s Nikolai Østgaard
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Talks and Posters

Publications
Given 74 Invited talks

2024

  • 575. J. Gordillo-Vasquez , S. Soler, F. J. Perez-Invernon, P. Jockel, T. Neubert, O. Chanrion, V. Reglero, N. Østgaard. Parameterizations for thundercloud streamer corona discharges: analysis for present day and end of the 21st century climate scenarios. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 574. M. Marisaldi , N. Østgaard and the ALOFT team The novel view of gamma-ray active thunderclouds from the ALOFT flight campaign. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 573. M. Stanley , P. Krehbiel , R. Thomas, R. Brown, Y. Pu, S. Cummer, M. Urbani, J. Montanya, N. Østgaard, M. Marisaldi and the ALOFT team Broadband VHF Interferometer Observations of ALOFT TGFs. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 572. N. G. Lehtinen , D.Sarria, M. Marisaldi, N. Østgaard, Ø. H. Færder. Flickering Gamma Flashes (FGF) as a Lotka-Volterra System. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 571. J. Montanya , ......., T. Neubert, N. Østgaard, V. Reglero. Analysis of the MTG-LI performance during the first days of public data with the Ebro Lightning Mapping Array and the ASIM instrument on the ISS. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 570. J. E. Groves , D. Shy, B. F. Phlips, M. Kerr, N. Østgaard, T. Lang, M. Marisaldi and the ALOFT team Temporal Morphology of Gamma-ray Glows from Thunderstorms Using iSTORM During the 2023 ALOFT Campaign. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 569. D. Sarria , N. Østgaard, M. Marisaldi and the ALOFT team Spectral analysis of Flickering Gamma Flashes observed during the ALOFT 2023 Campaign. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 568. N. Østgaard , A. Mezentsev , M. Marisaldi, D. Sarria, N. Lehtinen, T. Neubert, O. Chanrion, F. J. Gordillo-Vasquez. Discerning TGF and Leader Current Pulse in ASIM Observation AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 567. I. Bjørge-Engeland , N. Østgaard, M. Marisaldi and the ALOFT team New population of weak TGFs observed from aircraft altitude. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 566. D. Li , , A. Luque, E. Bruning, T. Neubert, O. Chanrion, Y. Zhu, J. Lapierre, N. Østgaard, V. Reglero. How Cloud Microphysics Affect Observations of Blue Corona Discharges in Thunderstorms AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 565. A. Fuglestad , M. Marisaldi, N. Østgaard and the ALOFT team The intensity distribution of Terrestrial Gamma-ray Flashes from the ALOFT flight campaign AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 564. Y. Pu ,S. Cummer, O. Scholten, B. Hare, N. Liu, N. Østgaard, M. Marisaldi and the ALOFT team Small Discharges at Thunderstorm Tops Imaged with VHF Interferometry. AGU fall meeting, Washington DC, USA, Dec, 2024.

  • 563. F. J. Navarro-González , J. F.Ripoll, F. J. Gordillo-Vazquez, P. Camino-Faillace, T. Neubert, O. Chanrion, N. Østgaard A Comprehensive Analysis of Optical Emissions in Exposed Lightning Channels ESCAMPIG XXVI, Brno, Chech Republic, July 9-13, 2024

  • 562. N. Østgaard , ALOFT team TGF and gamma-ray glow highlights from the ALOFT 2023 flight campaign 4th URSI AT-RASC, Gran Canaria, 19-24 May 2024

  • 561. N.G. Lehtinen , D. Sarria, M. Marisaldi, A. Mezentsev, N. Østgaard, S. Cummer and Y. Pu High-energy, optical and radio emissions from long streamer discharges 4th URSI AT-RASC, Gran Canaria, 19-24 May 2024

  • 560. N. Østgaard , ALOFT team TGF and gamma-ray glow highlights from the ALOFT 2023 flight campaign Invited talk at EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 559. M. Marisaldi , ALOFT team A novel view of gamma-ray glows from the ALOFT 2023 flight campaign EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 558. D. Sarria , ALOFT team Spectral Analysis of High-Energy Radiation Events Observed during the ALOFT 2023 Campaign EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 557. I. Bjørge-Engeland , ALOFT team TGFs observed by the ALOFT 2023 flight campaign during an ISS overpass EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 556. A. Nødland Fuglesstad , ALOFT team The intensity distribution of Terrestrial Gamma-ray Flashes from the ALOFT flight campaign EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 555. S. Cummer , ALOFT team Glow-terminating terrestrial gamma-ray flashes observed during the ALOFT Campaign EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 554. N. Lehtinen, D. Sarria, M. Marisaldi, A. Mezentsev,, N. Østgaard Thundercloud high-energy radiation production by long streamers EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 553. D. Li, A. Luque, T. Neubert, O. Chanrion, Y. Zhu, J. Lapierre, N. Østgaard, V. Reglero Cloud Microphysical Characteristics Associated with Blue Corona Discharges at thundercloud tops EGU General Assembly 2024,EGU24-7900 Vienna, Austria

  • 552. C. A. Morales Rodriguez, J. Montanyà, J. A. López, O. A. van der Velde, N. Østgaard, T. Neubert, V. Reglero GLM lightning flashes observed during ASIM triggers over Tropical South America EGU General Assembly 2024,EGU24-7900 Vienna, Austria

    2023

  • 551. N. Østgaard , ALOFT team Results from the ALOFT mission: a flight campaign for TGF and gamma-ray glow observations over Central America and the Caribbean in July 2023 AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 550. N. Lehtinen , D Sarria, M Marisaldi, N. Østgaard, A Luque, A Schmalzried Alternative mechanisms of fast negative streamer propagation and implications for x-ray generation AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 549. D. Sarria , ALOFT team (N. Østgaard) Observation of Long and Intense sequences of Gamma-ray Glows during the 2023 ALOFT flight campaign. AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 548. S. Cummer , ALOFT team (N. Østgaard) Low Frequency Radio Measurements of TGFs and Lightning during the ALOFT Campaign AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 547. I. Bjørge Engeland, N. Østgaard, M Marisaldi, A Luque, A Mezentsev, N G Lehtinen, O Chanrion, T Neubert and V Reglero High peak current lightning and the production of Elves AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 546. T. Lang , ALOFT team (N. Østgaard) Evaluation of present and future spaceborne lightning observations during the ALOFT campaign AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 545. M Marsaldi , ALOFT team (N. Østgaard) Terrestrial Gamma-ray Flash observations by the ALOFT flight campaign AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 544. D. Shy , ALOFT team (N. Østgaard) Temporal And Spectral Observations of Gamma-ray Transients from Thunderstorms Using iSTORM on ALOFT AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 543. J. Montanya , ALOFT team (N. Østgaard) Summary of the lightning ground measurements at the Island of San Andres to support the ALOFT flight campaign and ASIM AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 542. C. Koehn , O Chanrion, V Reglero, N. Østgaard, H J Christian, T J Lang, R J Blakeslee and T. Neubert Employing Optical Lightning Data to identify lightning flashes associated to Terrestrial Gamma-ray Flashes. AGU fall meeting, San Francisco, USA, Dec, 2023.

  • 541. P. A. Camino , F. J. Pérez-Invernon, F.J. Gordillo-Vazquez, T. Neubert, V. Reglero, N. Østgaard Simultaneous detection of lightning producing wildfires using ground-based detectors and low-earth / geostationary orbit lightning sensors EUMETSAT Meteorological Satellite Conference 2023, Malmö, Sweden, 11-15 September 2023

  • 540. D. Li ,T. Neubert, O. Chanrion, L. Skaaning Husbjerg, A. Luque, N. Østgaard, V. Reglero Optical Emissions from Lightning Processes and the Impact of Cloud Properties in Space-Based Observations EUMETSAT Meteorological Satellite Conference 2023, Malmö, Sweden, 11-15 September 2023

  • 540. I. Bjørge-Engeland , N. Østgaard, M. Marisaldi, A. Luque, A. Mezentsev, O. Chanrion, T. Neubert, V. Reglero Detections of high peak current lightning and observations of Elves IUGG, Berlin 11-20 July, 2023.

  • 539. N. Østgaard , M. Marisaldi, K. Ullaland, S. Yang, J. Søndergaard, A. Mezentsev, D. Sarria, N. Lehtinen, T. Lang, H. Christian, M. Quick, R. Blakeslee, E. Grove The ALOFT mission: a flight campaign for TGF and gamma-ray glow observations over Central America and the Caribbean in July 2023 EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 538. M. Marisaldi , N. Østgaard, K. Ullaland, S. Yang, J. Søndergaard, A. Mezentsev, D. Sarria, N. Lehtinen, T. Lang, H. Christian, M. Quick, R. Blakeslee, E. Grove The scientific payload of the ALOFT mission to chase TGFs and gamma-ray glows EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 537. I. Bjørge-Engeland , N. Østgaard, M. Marisaldi, A. Luque, A. Mezentsev, O. Chanrion, T. Neubert, V. Reglero Detections of high peak current lightning and observations of Elves EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 536. D. Sarria , N. Østgaard, M. Marisaldi, N. Lehtinen, A. Mezentsev, Library of simulated gamma-ray glows and application to previous airborne observations EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 535. A. Mezentsev, N. Østgaard, M. Marisaldi, T. Neubert, O. Chanrion, V. Reglero. Discerning TGF and leader current pulse in ASIM observation. EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 534. A. Luque , I. Bjørge-Engeland, N. Østgaard, M. Marisaldi Investigating ELVE photometric waveforms with elementary electromagnetics EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 533. L. Skaaning Husbjerg , T. Neubert, O. Chanrion, M. Marisaldi, M. Stendel, E. Kaas, N. Østgaard, V. Reglero Characterization of Thunderstorm Cells Producing Observable Terrestrial Gamma Ray Flashes EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 532. A. Ramsli , M. Marisaldi1, A. Tsvtkova, C. Guidorzi, D. Sarria, A. Mezentsev, A. Lindanger, N. Østgaard, T. Neubert, V. Reglero Validation of the ASIM MXGS performance using cosmic Gamma-Ray Bursts EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 531. J. Navarro-González .P. Connell, C. Eyles, V. Reglero, J. A. Lopez, J. Montanya, M. Marisaldi, A. Mezentzev, A. Lindanger, D. Sarria, N. Østgaard, O. Chanrion, F. Christiansen, T. Neubert. TGFs - "Storm Activity" relationship EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 530. P. A. Camino-Faillace .......N. Østgaard, V. Reglero, T. Neubert. Simultaneous detection of long continuing current lightning with space and ground-based detectors EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 529. F. J. Gordillo-Vazquez .......N. Østgaard, V. Reglero, T. Neubert. Worldwide distributions and key properties of Blue LUminous Events (BLUEs) as detected by ASIM EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 528. D. Li ,T. Neubert, O. Chanrion, L. Skaaning Husbjerg, A. Luque, Y. Zhu, N. Østgaard, , V. Reglero Optical properties of the shallow and exposed lightning discharges observed by ASIM EGU General Assembly, Vienna, Austria, April 23-27, 2023.

  • 527. C. Kohn , M. Heumesser, O. Chanrion, V. Reglero, N. Østgaard, H. J. Christian, T. J. Lang, R. J. Blakeslee, T. Neubert Development of an Algorithm to Detect Terrestrial Gamma-ray Flashes from Optical Lightning Data EGU General Assembly, Vienna, Austria, April 23-27, 2023.

    2022

  • 526. O. A. van der Velde , J. A. Lopez, J. Montanya, T. Neubert, V. Reglero, N. Østgaard, S. Soler. Sprites Recorded by the Modular Multispectral Imaging Array of ASIM. AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 525. J. Montanya, J. A. Lopez, J. F. Moran-Domínguez, O. A. van der Velde, J. Navarro-Gonzalez, V. Reglero, T. Neubert, N. Østgaard. An evaluation of GLM optical pulse detection using ASIM MMIA. AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 524. A. Mezentsev, N. Østgaard, M. Marisaldi, T. Neubert, O. Chanrion, V. Reglero. Discerning TGF and leader current pulse in ASIM observation. AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 523. M. Marisaldi, M. Urbini, X. Bai, A. Ursi, J. Smith, PO. Cristofanelli, F. Calzolari, J. Montanya, E. Virgilli, M. Fullekrug, A. Tiberia, S. Dietrich, M. Tavani, N. Østgaard. Interferometric Lightning Observations at Mount Cimone, Italy, in Association with the Gamma-Flash Experiment AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 522. J. Navarro-Gonzalez, P. Connell, C. Eyles, V. Reglero, J. A. Lopez, J. Montanya, M. Marisaldi, A. Mezentzev, A. Lindanger, David Sarria3, N. Østgaard, O. Chanrion, F. Christiansen, T. Neubert. Anisotropy distribution of TGFs couples: Central America region is the key. AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 521. I. Bjørge-Engeland, N. Østgaard, M. Marisaldi, A. Mezentsev, T. Neubert, V. Reglero, O. Chanrion. High peak current lightning and the production of Elves AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 520. D. Li, T. Neubert, L. Skaaning Husbjerg, Y. Zhu, O. Chanrion, J. Lapierre, A. Luque, C. Kohn, M. Heumesser, M. Stendel, E. Kaas, E. P. P. Wiinberg Olesen, F. Liu N. Østgaard, V. Reglero. Cloud microphysics properties related to blue corona discharges generated from deep convective cloud cells in cyclone Fani AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 519. A. Luque, D. Li, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, S. Soler, T. Neubert, O. Chanrion, N. Østgaard, V. Reglero. Light Scattering in Thunderclouds to Probe Flash Properties and Storm Evolution. AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 518. N. Østgaard, A. Mezentsev, M. Marisaldi, D. Sarria, K. Ullaland, G. Genov, T. Neubert, O. Chanrion, F. Christiansen, S. A. Cummer, G. Lu, V. Reglero, A. Luque. Double TGFs and associated optical pulses from lightning AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 517. D. Sarria, N. Østgaard, M. Marisaldi, N. Lehtinen, A. Mezentsev Library of simulated gamma-ray glows and application to previous airborne observations AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 516. F. J. Gordillo-Vazquez , F. J. Perez-Invernon, M. Passa-Varo, T. Neubert, O. Chanrion, V. Reglero, N. Østgaard. Multispectral Optical Diagnostics of Lightning from Space AGU physical/virtual meeting, Chicago, USA, Dec, 2022.

  • 515. N. Østgaard, A. Mezentsev, M. Marisaldi, D. Sarria, K. Ullaland, G. Genov, T. Neubert, O. Chanrion, F. Christiansen, S. A. Cummer, G. Lu, V. Reglero, A. Luque. Double TGFs and optical pulses observed by ASIM EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 514. A. Mezentsev, N. Østgaard, M. Marisaldi, T. Neubert, O. Chanrion, V. Reglero. Discerning TGF and leader current pulse in ASIM observation. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 513. A. Lindanger, A. Lindanger, C. A. Skeie, M. Marisaldi, I. Bjørge-Engeland, N. Østgaard, A. Mezentsev, D. Sarria, N. Lehtinen, V. Reglero, O. Chanrion, T. Neubert. Production of Terrestrial Gamma-ray Flashes During the Early Stages of Lightning Flashes. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 512. L. Skaaning Husbjerg, T. Neubert, O. Chanrion, K. Dimitriadou, M. Stendel, E. Kaas, N. Østgaard, V. Reglero. Observations of Blue Corona Discharges in Thunderclouds. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 511. X. Bai, M. Fullekrug, O. Chanrion, S. Soula, A. Peverell, D. Mashao, M. Kosch, T. Neubert, N. Østgaard, V. Reglero. Height Determination of a Blue Discharge Observed by ASIM/MMIA on the International Space Station. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 510. F. Liu, T. Neubert, O. Chanrion, B. Zhu, G. Lu, F. Lyu, K. Dimitriadou, J. Lei, N. Østgaard, V. Reglero. Ionospheric elves powered by negative Narrow Bipolar Events in overshooting thunderclouds. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022. s

  • 509. D. Li, A. Luque, F. J. Gordillo-Vazquez, T. Neubert, G. Lu, O. Chanrion, H. Zhang, N. Østgaard, V. Reglero. Multiple-pulse blue luminous events detected by ASIM. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 508. I. Bjørge-Engeland, N. Østgaard, A. Mezentsev, C. A. Skeie, D. Sarria, J. Lapierre, A. Lindanger, T. Neubert, M. Marisaldi, N. Lehtinen, O. Chanrion, K. Ullaland, S. Yang, G. Genov, F. Christiansen, V. Reglero. Observations by ASIM of Terrestrial Gamma-ray Flashes accompanied by Elves. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 507. J. Navarro-Gonzalez, P. Connell, C. Eyles, V. Reglero, J. A. Lopez, J. Montanya, M. Marisaldi, A. Mezentzev, P. Kochkin, A. Lindanger, D. Sarria, N. Østgaard, O. Chanrion, F. Christiansen and T. Neubert. Brother TGF. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 506. D. Sarria, A. Lindanger, N. Østgaard, M. Marisaldi, A. Mezentsev, T. Neubert, V. Reglero. Spectral Analysis on Multi-Pulse TGFs detected by ASIM. EGU physical/virtual meeting, Vienna, Austria, May 23-27, 2022.

  • 505. M. Marisaldi on behalf of the ASIM team Highlights from the Atmosphere-Space Interactions Monitor Norsk Fysisk Selskap, Tromsø, March 2022.

  • 504. I. Bjørge-Engeland, N. Østgaard, A. Mezentsev, C. A. Skeie, D. Sarria, J. Lapierre, A. Lindanger, T. Neubert, M. Marisaldi, N. Lehtinen, O. Chanrion, K. Ullaland, S. Yang, G. Genov, F. Christiansen, V. Reglero. TGFs with Accompanying Elves Detected by ASIM. Norsk Fysisk Selskap, Tromsø, March 2022.

    2021

  • 503. N. Østgaard, A. Mezentsev, M. Marisaldi, D. Sarria, K. Ullaland, G. Genov, T. Neubert, O. Chanrion, F. Christiansen, S. A. Cummer, G. Lu, V. Reglero, Double TGFs and optical pulses observed by ASIM AGU meeting, New Orleans, US, Dec. 2021.

  • 502. D. Li, A. Luque, F. J. Gordillo-Vazquez, F. Liu, G. Lu, T. Neubert, O. Chanrion, B. Zhu, N. Østgaard and Reglero V. Reglero. Blue Flashes as Counterparts to Narrow Bipolar Events: the Optical Signal of Shallow In-Cloud Discharges. AGU meeting, New Orleans, US, Dec. 2021.

  • 501. P. Bitzer, T. Lang, T. Neubert, O. Chanrion, V. Reglero, and N. Østgaard. Multifrequency optical observations of lightning with ISS-LIS and ASIM. AGU meeting, New Orleans, US, Dec. 2021.

  • 500. A. Huang, S. A. Cummer, T. Neubert, O. Chanrion, V. Reglero, and N. Østgaard. Transition in Optical and Radio Features during the Initial Leader Development of Intracloud Lightning. AGU meeting, New Orleans, US, Dec. 2021.

  • 499. D. Sarria , N. Østgaard, M. Marisaldi, A. Lindanger, T. Neubert, V. Reglero. Investigating bright TGF events detected by the Atmosphere-Space Interactions Monitor AGU meeting, New Orleans, US, Dec. 2021.

  • 498. A. Lindanger, C. A. Skeie, M. Marisaldi, I. Bjørge-Engeland, N. Østgaard, A. Mezentsev, V. Reglero, T. Neubert. Statistical Evidence of Terrestrial Gamma-ray Flashes Production During the Early Stages of Lightning Flashes. AGU meeting, New Orleans, US, Dec. 2021.

  • 497. L. Husbjerg, T. Neubert, O. Chanrion, V. Reglero, N. Østgaard, M. Stendel, E. Kaas, K. Dimitriadou, E. Olesen. Investigating blue corona discharges with ASIM. AGU meeting, New Orleans, US, Dec. 2021.

  • 496. V. Reglero, J. Navarro-Gonzales, P. H. Connell, C. Eyles, T. Neubert, N. Østgaard, O. Chanrion, F. Christiansen. ASIM TGF Imaging 2018-2019. AGU meeting, New Orleans, US, Dec. 2021.

  • 495. J. P. Reistad, K. Laundal, N. Østgaard, A. Ohma, S. Hatch, S. Haaland, A. Burrell, E. Thomas. Isolating and quantifying the effect of lobe reconnection on high latitude ionospheric convection during IMF By dominated periods. AGU meeting, New Orleans, US, Dec. 2021.

  • 494. N. Østgaard, A. Mezentsev, M. Marisaldi, P. Kochkin, T. Neubert, V. Reglero, O. Chanrion, N. Lehtinen, D. Sarria, C. Skeie, I. Bjørge-Engeland, A. Lindanger, F. Christiansen, K. Ullaland, G. Genov, C. Budzt Jørgensen. New highlights of gamma-ray observations by ASIM, Invited talk at URSI GASS, Rome, Italy, 28 aug-4 september, 2021.

  • 493. T. Neubert , O. Chanrion, K. Dimitriadou, M. Heumesser, L. Husbjerg, J. Montanya, O. van derVelde, F. Gordillo-Vazquez, A. Luque, N. Østgaard, V. Reglero. Observations of thunderstorms by the Atmosphere-Space Interactions Monitor. Invited talk at URSI GASS, Rome, Italy, 28 aug-4 september, 2021.

  • 492. C. Kohn , M. Heumesser, O. Chanrion, K. Dimitriadou, V. Reglero, N. Østgaard, T. Neubert. Modelling the production of terrestrial gamma-ray flashes in the streamer coronae ahead of a lightning leader. URSI GASS, Rome, Italy, 28 aug-4 september, 2021.

  • 491. A. Ohma, N. Østgaard, K. M. Laundal, J. P. Reistad, S. M. Hatch, P. Tenfjord. Evolution of IMF By induced asymmetries: The role of tail reconnection. Solar wind-Magnetosphere Interaction Workshop, APL, US, Aug-Sept. 2021.

  • 490. J. P. Reistad, K. Laundal, N. Østgaard, A. Ohma, S. Hatch, S. Haaland, A. Burrell, E. Thomas. What is the relative importance of lobe reconnection versus Dungey-type reconnection when IMF By is dominating? Solar wind-Magnetosphere Interaction Workshop, APL, US, Aug-Sept. 2021.

  • 489. K. Dimitriadou, O. Chanrion, L. Chaumat, H. J. Christian3, R. J. Blakeslee, M. Heumesser, N. Østgaard, V. Reglero, T. Neubert Analysis of lightning detections and performance assessment of ASIM and GOES-16 GLM for MTG-LI applications. EUMETSAT Meteorological Satellite Conference, Romania, September 2021.

  • 488. N. Østgaard, A. Mezentsev, M. Marisaldi, Pavlo Kochkin, Torsten Neubert, Victor Reglero, O. Chanrion, N. Lehtinen, D. Sarria, C. Skeie, I. Bjørge-Engeland, A. Lindanger, Freddy Christiansen, Kjetil Ullaland, Georgi Genov, C. Budzt Jørgensen. New highlights of gamma-ray observations by ASIM EGU virtual meeting, 19-30 April, 2021.

  • 487. K. Dimitriadou, O. Chanrion, L. Chaumat, H. J. Christian3, R. J. Blakeslee, M. Heumesser, N. Østgaard, V. Reglero, T. Neubert Comparison of lightning observed by ASIM on the International Space Station and GLM on the GOES-16 geostationary satellite. EGU virtual meeting, 19-30 April, 2021.

  • 486. L. Boggs, T. Neubert, O. Chanrion, V. Reglero, N. Østgaard, M. Heumesser, A. Nag, E. Bruning. Optical and Radio emissions of a possible blue starter observed by ASIM and the West Texas LMA. EGU virtual meeting, 19-30 April, 2021.

  • 485. A. Mezentsev, N. Østgaard, T. Neubert, V. Reglero. ASIM TGFs associated with high peak current strokes. EGU virtual meeting, 19-30 April, 2021.

  • 484. A. Lindanger, M. Marisaldi, D. Sarria, N. Østgaard,, N. Lehtinen, A. Mezentsev, P. Kochkin, C. A. Skeie, K. Ullaland, S. Yang, G. Genov, B. E. Carlson, T. Neubert, V. Reglero, F. Christiansen, C. Kohn, C. Maiorana, I. Bjørge-Engeland. Spectral Analysis of Individual Terrestrial Gamma-ray Flashes Detected by ASIM. EGU virtual meeting, 19-30 April, 2021.

  • 483. D. Sarria, N. Østgaard,P. Kochkin, N. Lehtinen, A. Mezentsev, M. Marisaldi, A. Lindanger, C. Maiorana, B. E. Carlson, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, B. Qureshi, C. Budtz-J&oslah;rgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, J. Navarro-Gonzalez, and the Atmosphere-Space Interactions Monitor (ASIM) team. Constraining spectral models of a terrestrial gamma-ray flash from a terrestrial electron beam observation by the Atmosphere-Space Interactions Monitor. EGU virtual meeting, 19-30 April, 2021.

  • 482. C. A. Skeie, N. Østgaard, A. Mezentsev, I. Bjørge-Engeland, A. Lindanger, T. Neubert, V. Reglero. Investigating the relationship between TGF durations and the onset times of the optical pulses and the TGFs. EGU virtual meeting, 19-30 April, 2021.

  • 481. I. Bjørge-Engeland, N. Østgaard, A. Mezentsev, T. Neubert, O. Chanrion, C. A. Skeie, M. Marisaldi, K. Ullaland, G. Genov, V. Reglero. ASIM TGFs with accompanying elves. EGU virtual meeting, 19-30 April, 2021.

  • 480. C. Maiorana1, M. Marisaldi, M. Fullekrug, S. Soula, J. Lapierre, A. Mezentsev, C. A. Skeie, M. Heumesser, O. Chanrion, N. Østgaard, T. Neubert, V. Reglero. Observation of TGFs at High Latitude. EGU virtual meeting, 19-30 April, 2021.

  • 479. J. P. Reistad, A. Ohma, K. Laundal, N. Østgaard, E. Thomas, A. Burrell, S. Hatch and S. Haaland. The importance of lobe reconnection during dominant IMF By periods. EGU virtual meeting, 19-30 April, 2021.

    2020

  • 478. N. Østgaard, K. Laundal, J. Reistad, P. Tenfjord, A. Ohma and S. Hatch. How large scale asymmetries in geospace are produced and removed. Invited talk at the AGU Fall meeting - virtual 1-17 December, 2020.

  • 477. N. Østgaard, S. Cummer, A. Mezentsev, T. Neubert, V. Reglero, M. Marisaldi, Pavlo Kochkin, D. Sarria, N. Lehtinen, K. Ullaland, Shiming Yang, Georgi Genov. O. Chanrion, F. Christiansen, Y. Pu, A. Luque, J. R. Dwyer. TGF and elves produced by the same thunderstorm system. AGU Fall meeting - virtual 1-17 December, 2020. s

  • 476. D. Sarria, N. Østgaard, P. Kochkin, N. G. Lehtinen, A. Mezentsev, M. Marisaldi, A. Lindanger, C. Maiorana, B. Carlson, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, B. Hasan Qureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, J. Navarro-Gonzalez, P. H. Connel, C. J. Eyles. Constraining spectral models of terrestrial gamma-ray flashes from a terrestrial electron beam observation by the Atmosphere-Space Interactions Monitor. talk at the AGU Fall meeting - virtual 1-17 December, 2020.

  • 475. M. Marisaldi, A. Mezentsev, D. Sarria, A. Lindanger, N. Østgaard, T. Neubert, V. Reglero, P. Kochkin, N. G. Lehtinen, C. Maiorana, C. A. Skeie1, I. Bjørge-Engeland, K. Ullaland, G. Genov, F. Christiansen, H. J. Christian, S. Alnussirat, M. S. Briggs, A. Ursi, M. Tavani. ASIM - Fermi - AGILE simultaneous observation of Terrestrial Gamma-ray Flashes. AGU Fall meeting - virtual 1-17 December, 2020.

  • 474. N. Østgaard, T. Neubert, V. Reglero, O. Chanrion, A. Mezentsev, M. Marisaldi, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, M. Heumesser, K. Dimitriadou, J. Navarro-Gonzales, P. Connell, C. Eyles, S. Cummer Y. Pu, Freddy Christiansen, Chris Eyles, Kjetil Ullaland, Georgi Genov. Recent science results from ASIM. Invited talk at the URSI GASS 2020, Rome, Italy, 29 August - 5 September 2020. Meeting was postphoned to 2021 due to the COVID19.

  • 473. T. Neubert, O. Chanrion, K. Dimitriadou, M. Heumesser, E. P. P. Wiinbe, R. C. Jørgensen, L. Husbjerg, J. Montanya, O. van der Velde, N. Østgaard and Victor Reglero Observations of thunderstorms by the Atmosphere-Space Interactions Monitor. Invited talk at the URSI GASS 2020, Rome, Italy, 29 August - 5 September 2020. Meeting was postphoned to 2021 due to the COVID19.

  • 472. J. P. Reistad, A. Ohma, K. M. Laundal, T. Moretto, S. E. Milan, N. Østgaard. Understanding the explicit IMF By dependence on solar wind - magnetosphere coupling Invited talk at the COSPAR meeting in Sidney, Australia, 15-22 August, 2020.

  • 471. S. Sembay, Richard Hampson , Andrew Cheney , Andrew Read, Julian Thornhill, Adrian Martindale, Piyal Samara-Ratna, Parthil Patel (, Siddhant Sachdev , Charly Feldman, Chris Bicknell, Jennifer Carter, Graziella Branduardi-Raymont , Tom Kennedy, Dave Walton , Sampie Smit , Andrey Samsonov , Andrew Holland, Matt Soman, George Randall, David Hall, Walfried Raab, David Agnolon, Chris Runciman, Philippe Escoubet, Fabio Giannini, Tianran Sun, Chi Wang, Wei Fei, Roland Ottensamer, Manuel Gudel, Franz Kerschbaum, Stefan Koegl, Nicholas Eaton, Sam Krucker, N. Østgaard, Kjellmar Oksavik, Georgi Genov, Maja Rostad, Manfred Stellar , Gunter Laky, M. C. Bueno, A. B. B. Margeli, J. M. M. Hesse, D. Sibeck, K. Kuntz, M. Collier, S.-Y. Hsieh, B. Walsh, H. Connor . THE SOFT X-RAY IMAGER (SXI) ON THE SMILE MISSION The COSPAR meeting in Sidney, Australia, 15-22 August, 2020.

  • 470. P. Jamlongkul, J.P. Reistad, F. Sørå N. Østgaard, S Wannawichian, K Haewsantati. Investigation of FUV intensities from SDRs data based on DMSP/SSUSI during the strong geomagnetic storm events AOGS2020, Hongcheon, Korea, 28 June - 4 July, 2020.

  • 469. S. Haaland, S.M. Hatch, B. Lybekk, A. Pedersen, K.M. Laundal, T. Moretto, J.P. Reistad, K. Oksavik, L. Bjoland, A. Ohma, N. Østgaard, P. Krcelic. An intriguing hemispheric asymmetry in cold plasma density in the magnetotail lobes. ICPP, Los Alamos, US, JUne 1-4, 2020.

  • 468. N. Østgaard, S. Cummer, A. Mezentsev, Torsten Neubert, Victor Reglero, O. Chanrion, M. Marisaldi, Pavlo Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, Y. Pu, Freddy Christiansen, Chris Eyles, Kjetil Ullaland, Georgi Genov. One TGF and two elves produced by the same thunderstorm system. Invited talk at the JpGU - AGU Joint meeting, Chiba, Japan, 24-28 May, 2020.

  • 467. M. Heumesser, O. Chanrion, T. Neubert, K. Dimitriadou, H. Christian, R. Blakeslee, N. Østgaard, A. Mezentsev and V. Reglero. Optical Signatures Associated with Terrestrial Gamma-Ray Flashes in the 777.4 nm band and their relevance for MTG-I LI EUMETSAT conference, Wurzburg, Germany, 28 September - 2 October, 2020.

  • 466. N. Østgaard, A. Mezentsev, S. Cummer, T. Neubert, V. Reglero, O. Chanrion, M. Marisaldi, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, Y. Pu, F. Christiansen, Kj. Ullaland, G. Genov. One TGF and two elves produced by the same thunderstorm system. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 465. J. A. Lopez, ..........N. Østgaard,et al. Simultaneous detection of lightning flashes by MMIA-ASIM and Colombia Lightning Mapping Array EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 464. A. Ohma , N. Østgaard, J. P. Reistad, K. M. Laundal. How tail reconnection affects the asymmetric state of the magnetosphere in the LFM model EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 463. J. P. Reistad, A. Ohma, K. M. Laundal, T. Moretto, S. E. Milan, N. Østgaard. On the origins of an explicit IMF By dependence on solar wind - magnetosphere coupling EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 462. K. Dimitriadou, K. Dimitriadou O. Chanrion, T. Neubert, M. Heumesser, A. Protat, V. Louf, H. Christian, R. Blakeslee, C. Kohn, N. Østgaard and V. Reglero Analysis of Blue Discharges in Thunderclouds EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 461. O. Chanrion, T. Neubert, V. Reglero, N. Østgaard, and ASIM team. Analysis of Elves observations from about 2 years of ASIM operation. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 460. A. Lindanger, M. Marisaldi, N. Østgaard, A. Mezentsev, Torsten Neubert, Victor Reglero, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. A. Skeie, I. Bjørge-Engeland, Kjetil Ullaland, Georgi Genov, Freddy Christiansen, Christoph Kohn Energy spectrum from single TGFs detected by ASIM EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 459. Martino Marisaldi, A. Mezentsev, D. Sarria, Anders Lindanger, Nikolai Østgaard, Torsten Neuber, Victor Reglero, Pavlo Kochkin, N. Lehtinen, Carolina Maiorana, C. A. Skeie, I. Bjørge-Engeland, Kjetil Ullaland, Georgi Genov, Freddy Christiansen, Hugh Christian, Samer Al-Nussirat, Michael Briggs, Alessandro Ursi, Marco Taviani. Simultaneous observation of Terrestrial Gamma-ray Flashes by ASIM, Fermi and AGILE. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 458. Pavlo Kochkin, Nikolai Østgaard, Torsten Neubert, Victor Reglero, Kjetil Ullaland, Shiming Yang, Georgi Genov, Martino Marisaldi, A. Mezentsev, N. Lehtinen, D. Sarria, Anders Lindanger, Ingrid Engeland, Chris Alexander Skeie, Bilal Hasan Qureshi, Arne Solberg, Carolina Maiorana, Freddy Christiansen. Multipulse TGFs and associated optical emission as seen by ASIM. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 457. Carolina Maiorana, Martino Marisaldi, A. Mezentsev, Nikolai Østgaard, M. Fullekrug, S. Soula, T. Neubert, V. Reglero. Observation of TGFs at high-latitude EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 456. V. Reglero, P. Connell, J. Navarro, C. Eyles, N. Østgaard, T. Neubert, F. Fabro, J. Montanya, A. Mezentsev, O. Chanrion, F. Christiansen, P. Kochkin. Extreme TGF Imaging by ASIM. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 455. A. Mezentsev N. Østgaard, M. Marisaldi, P. Kochkin, T. Neubert, O. Chanrion, M. Heumesser, V. Reglero, F. Christiansen, Kj. Ullaland, G. Genov. Lightning optical context associated with ASIM TGFs. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 454. I. B. Engeland N. Østgaard, C. A. Skeie, A. Mezentsev, T. Neubert, V. Reglero, M. Marisaldi, P. Kochkin, N. G. Lehtinen, D. Sarria, C. Maiorana, A. Lindanger, F. Christiansen, Kj. Ullaland, G. Genov. Time sequence of TGFs and optical pulses detected by ASIM. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 453.C. A. Skeie N. Østgaard, I. B. Engeland, A. Mezentsev, T. Neubert, V. Reglero, M. Marisaldi, P. Kochkin, N. G. Lehtinen, D. Sarria, C. Maiorana, A. Lindanger, F. Christiansen, Kj. Ullaland, G. Genov. Assessing the relationship between the TGF durations and the onset times of the TGFs and the main optical pulses as detected by ASIM. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 452. D. Sarria, P. Kochkin, N. Østgaard, A. Mezentsev, N. G. Lehtinen, M. Marisaldi, C. Maiorana, T. Neubert, V. Reglero, B. E. Carlson, K. Ullaland, S. Yang, G. Genov, B. Qureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, J. Navarro-Gonzales, P. H. Connell, C. J Eyles Observation of a Terrestrial Electron Beam during the tropical cyclone Joaninha in March 2019. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

  • 451. M. Heumesser, O. Chanrion, T. Neubert, K. Dimitriadou, C. Kohn, F. J. Gordillo-Vazquez, A. Luque, F. J. Perez-Invernon, H. Christian, R. Blakeslee, N. Østgaard, A. Mezentsev and M. Marisaldi Inferring Source Altitudes for Optical Emissions Associated with TGFs. EGU General Assembly 2020, Vienna, Austria, 4-9 May, 2020.

    2019

  • 450. P. Tenfjord, N. Østgaard, R. Strangeway, M. Hesse, J.P. Reistad, K. Laundal, A. Ohma, S. Haaland, K. Snekvik, S. E. Milan.Magnetospheric response and reconfiguration times following IMF By reversals. Invited talk at the AGU fall meeting, San Francisco, December 2019, USA.

  • 449. N. Østgaard, T. Neubert, V. Reglero, O. Chanrion, A. Mezentsev, M. Marisaldi, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, M. Heumesser, K. Dimitriadou, J. Navarro-Gonzales, P. Connell, C. Eyles. New science results from ASIM. Invited talk at the AGU fall meeting, San Francisco, December 2019, USA.

  • 448. F. J. Perez-Invernon, s. Soler, F. J. Gordillo-Vazquez, A. Luque, D. Li, A. Malagon-Romero, T. Neubert, O. Chanrion, K. Dimitriadou, M. Heumesser, V. Reglero, J. Navarro-Gonzalez, N. Østgaard, G. Lu, H. Zhang, A. Huang. Analysis of blue discharges detected by ASIM-MMIA with indication of their source altitudes and electromagnetic signature. AGU fall meeting, San Francisco, December 2019, USA.

  • 447. S. E Milan, J. Alyson Carter, M-T. Walach, H. Sangha, K. Laundal, N. Østgaard, P. Tenfjord, J. P. Reistad, B. J. Anderson. Timescales of Dayside and Nightside Field-Aligned Current Response to Changes in Solar Wind-Magnetosphere Coupling. AGU fall meeting, San Francisco, December 2019, USA.

  • 446. P Jamlongkul, J P Reistad, F Søraas, N Østgaard, S Wannawichian, K Haewsantati. Investigation of FUV irradiances from SDRs data based on DMSP/SSUSI during various strong geomagnetic storm events. AGU fall meeting, San Francisco, December 2019, USA.

  • 445. J. P. Reistad, K. M. Laundal, A. Ohma, N. Østgaard, E. G. Thomas, S. Haaland, K. Oksavik, S. E. Milan. Quantifying the dipole tilt influence on reverse convection cells during northward IMF using spherical elementary functions. AGU fall meeting, San Francisco, December 2019, USA.

  • 444. O. Chanrion, T. Neubert, C. Zuccotti, M. Heumesser, K. Dimitriadou, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, N. Østgaard, A. Mezentsev, V. Reglero. Analysis of Elves observations from one year of ASIM operation. AGU fall meeting, San Francisco, December 2019, USA.

  • 443. K. Dimitriadou, O. Chanrion, T. Neubert, M. Heumesser, A. Protat, V. Louf, C. Kohn, N. Østgaard, V. Reglero, F. J. Gordillo-Vazquez, F. J. Perez-Invernon. A meteorological study of a blue discharge-producing Australian thunderstorm captured by ASIM on the ISS. AGU fall meeting, San Francisco, December 2019, USA.

  • 442. N. Østgaard, A. Mezentsev, S. Cummer, T. Neubert, V. Reglero, O. Chanrion, M. Marisaldi, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, Y. Pu. One TGF and two elves produced by the same thunderstorm system. AGU fall meeting, San Francisco, December 2019, USA.

  • 441. C. A. Skeie, N. Østgaard, A. Mezentsev, T. Neubert, V. Reglero, O. Chanrion, M. Marisaldi, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, A. Lindanger, I. B. Engeland. The relationship between the TGF durations and the relative onset times of the TGFs and main optical pulse. AGU fall meeting, San Francisco, December 2019, USA.

  • 440. P. Kochkin, N. Østgaard, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, N. Lehtinen, D. Sarria, I. Engeland, B. Hasan Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, C. Kohn, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles, J. Dwyer, S. Celestin. On multi-pulse TGFs observed by the ASIM payload on the International Space Station. AGU fall meeting, San Francisco, December 2019, USA.

  • 439. M. Marisaldi, N. Østgaard, T. Neubert, V. Reglero, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, A. Lindanger, O. Chanrion, M. Heumesser, K. Dimitriadou, J. Navarro-Gonzales, P. Connell, C. Eyles, F. Christensen. Terrestrial Gamma-ray Flashes science highlights from the ASIM mission Invited talk at the AGU fall meeting, San Francisco, December 2019, USA.

  • 438. V. Reglero, P. Connell, J. Navarro, C. Eyles, N. Østgaard, T. Neubert, F. Fabro, J. Montanya, A. Mezentsev, O. Chanrion, F. Christiansen, P. Kochkin. Extreme TGF Imaging by ASIM. AGU fall meeting, San Francisco, December 2019, USA.

  • 437. A. Lindanger, M. Marisaldi, N. Østgaard, A. Mezentsev, T. Neubert, V. Reglero, P. Kochkin, N. Lehtinen, D. Sarria, C. Maiorana, C. Skeie, I. B. Engeland. Energy spectrum from single TGFs detected by ASIM. AGU fall meeting, San Francisco, December 2019, USA.

  • 436. M. Heumesser, O. Chanrion, T. Neubert, K. Dimitriadou, C. Kohn, F. Christiansen, I. Lundgaard Rasmussen, N. Østgaard, V. Reglero, A. Mezentsev, M. Marisaldi, F. J. Gordillo-Vazquez, A. Luque, F. J. Perez-Invernón, R. Blakeslee, K. Virts and H. Christian. UV and Optical Lightning Activity Associated with TGFs. AGU fall meeting, San Francisco, December 2019, USA.

  • 435. D. Sarria, P. Kochkin, N. Østgaard, B. E. Carlson, A. Mezentsev, N. Lehtinen, M. Marisaldi, C. Maiorana, K. Albrechtsen, T. Neubert, V. Reglero, K. Ullaland, S.Yang, G. Genov, B. H. Qureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. Observation of a Terrestrial Electron Beam during the tropical cyclone Joaninha in March 2019. AGU fall meeting, San Francisco, December 2019, USA.

  • 434. T. Neubert, O. Chanrion, K. Dimitriadou, M. Heumesser, L. Husbjerg, I. Lundgaard-Rasmussen, V. Reglero and N. Østgaard. The genesis of blue lightning into the stratosphere. AGU fall meeting, San Francisco, December 2019, USA.

  • 433. M. Marisaldi, M. Galli, C. Labanti, N. Østgaard, D. Sarria, S.A. Cummer, F. Lyu, A. Lindanger, R. Campana, A. Ursi, M. Tavani, F. Fuschino, A. Argan, A. Trois, C. Pittori and F. Verrecchia. A solution to the eight year-long controversy on the high-energy spectral component of Terrestrial Gamma-ray Flashes. AGU fall meeting, San Francisco, December 2019, USA.

  • 432. C. Maiorana, M. Marisaldi1, A. Mezentsev, N. Østgaard, M. Fullekrug, S. Soula, G. Lu, The ASIM Team. Observation of TGFs at high-latitude AGU fall meeting, San Francisco, December 2019, USA.

  • 431. N. Østgaard, T. Neubert, Vi. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. Recent results from ASIM mission. Talk at the IUGG meeting , Montreal, Canada, July, 2019.

  • 430. N. Østgaard, T. Neubert, Vi. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. Highlights and new science from first year of TGF observations by ASIM. Talk at the IUGG meeting , Montreal, Canada, July, 2019.

  • 429. K. M. Laundal, A. Ohma, J. P. Reistad, P. Tenfjord, N. Østgaard. Tail Reconnection Reduces Interhemispheric Asymmetry. AOGS, SIngapore, 28 Jul - 2 Aug, 2019.

  • 428. M. Marisaldi, N. Østgaard, T. Neubert, Vi. Reglero, K. Ullaland, S. Yang, G. Genov, , A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles, H. Christian, S. Al Nussirat. ASIM - Fermi simultaneous observation of Terrestrial Gamma-ray Flashes EGU General Assembly, Wien, Austria, April 2019.

  • 427. N. Østgaard, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles, H. Christian, S. Al Nussirat. Highlights and new science from first year of TGF observations by ASIM. EGU General Assembly, Wien, Austria, April 2019.

  • 426. S. Soler, F. J. Perez-Invernon, F. J. Gordillo-Vazquez, A. Malagon, A. Luque, J. Navarro-Gonzalez, V. Reglero, T. Neubert, N. Østgaard, O. Chanrion, K. Dimitriadou, C. Zucotti, M. Heumesser, Analysis of spectral emissions associated with thunderstorm activity detected by ASIM. EGU General Assembly, Wien, Austria, April 2019.

  • 425. J. P. Reistad, K. M. Laundal, A. Ohma, N. Østgaard, E. G. Thomas, K. Oksavik, S. E. Milan, A new way to identify and quantify the sources of ionospheric convection EGU General Assembly, Wien, Austria, April 2019.

  • 424. A. Ohma, N. Østgaard, J. P. Reistad, P. Tenfjord, K. M. Laundal, T. Moretto Jørgensen, S. Haaland, Cluster EDI Observations of the Asymmetric Plasma Convection in the Magnetotail Lobes During Different Levels of Tail Reconnection Rate. EGU General Assembly, Wien, Austria, April 2019.

  • 423. C. A. Skeie, N. Østgaard, P. Kochkin, D. Sarria, N. Lehtinen, A. I. de Bohr, M. Bardet, C. Allasia, F. Flourens, A. P. J. Deursen, Recoil leader properties estimated from X-ray emission in aircraft triggered discharges EGU General Assembly, Wien, Austria, April 2019.

  • 422. C. Kohn, N. Østgaard, V. Reglero, and the ASIM team Modelling the production of gamma-ray flashes from encountering leaders EGU General Assembly, Wien, Austria, April 2019.

  • 421. T. Neubert, N. Østgaard, V. Reglero, E. Blanc, O. Chanrion, M. Heumesser, K. Dimitriadou,T. Farges, H. Christian, R. Blakeslee, C. Budtz-Jørgensen, I. Kuvvetli,I. Lundgaard Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg Observations of Lightning, TLEs and TGFs with the Atmosphere-Space Interactions Monitor on the International Space Station. Invited talk at the EGU General Assembly, Wien, Austria, April 2019.

  • 420. V. Reglero, N. Østgaard, T. Neubert, P. Connell, C. J. Eyles, J. Navarro, M. Marisaldi, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, B. H. Oureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, P. Brauer, A. Solberg. The first half year of ASIM TGF Imaging EGU General Assembly, Wien, Austria, April 2019.

  • 419. O. Chanrion, T. Neubert, S. A Cummer, M. Heumesser, K. Dimitriadou, N. Østgaard, V. Reglero, R. J. Blakeslee, K. Virts, H. J. Christian, I. L. Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen. Global map of thunderstorm flashes from one year of ASIM operation.. EGU General Assembly, Wien, Austria, April 2019.

  • 418. A. Mezentsev ,P. Kochkin, A. N. Østgaard, D. Sarria, H. Christian, E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, M. Marisaldi, N. Lehtinen In-cloud gamma-ray glow termination mechanism EGU General Assembly, Wien, Austria, April 2019.

  • 417. P. Kochkin, C. Skeie, A. I. de Bohr, M. Bardet, C. Allasia, F. Flourens, H. J. Christian, J. E. Grove, M. Quick, S. A. Nussirat, E. Wulf, S. Yang, G. Genov, K. Ullaland, M. Marisaldi, N. Lehtinen, A. Mezentsev, D. Sarria, A. P. J. Deursen, N. Østgaard High-Energy Atmospheric Phenomena observed in "lightning hole" proximity EGU General Assembly, Wien, Austria, April 2019.

  • 416. K. Dimitriadou, O. Chanrion, T. Neubert, M. Heumesser, Nikolai Østgaard, V. Reglero, T. Farges, R. Blakeslee, K. Virts, H. Christian, F. Gordillo-Vazquez, I. L. Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen. Spectral properties of lightning and TLEs observed by ASIM on the International Space Station EGU General Assembly, Wien, Austria, April 2019.

  • 415. M. Heumesser, O. Chanrion, T. Neubert, K. Dimitriadou1, N. Østgaard, V. Reglero, T. Farges, R. Blakeslee, K. Virts, H. Christian, F. Gordillo-Vazquez, I. . Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, C. Budtz-Jørgensen, I. Kuvvetli, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg. Properties of Lightning Associated with TGFs as Observed by ASIM EGU General Assembly, Wien, Austria, April 2019.

  • 414. D. Sarria, P. Kochkin, N. Østgaard, A. Mezentsev, N. Lehtinen, M. Marisaldi, C. Maiorana, K. Albrechtsen, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, B. Hasan Qureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen , O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. The First Terrestrial Electron Beam Observed by The Atmosphere-Space Interactions Monitor EGU General Assembly, Wien, Austria, April 2019.

  • 413. C. Maiorana, M. Marisaldi, A. Lindanger, N. Østgaard, A. Ursi, M. Tavani. The 3rd AGILE TGF Catalogue: New Selection Criteria and Characteristics of the Sample EGU General Assembly, Wien, Austria, April 2019.

  • 412. A. Lindanger , M. Marisaldi, C. Maiorana, N. Østgaard, A. Ursi, M. Tavani. The 3rd AGILE TGF catalog: simultaneous lightning associations. EGU General Assembly, Wien, Austria, April 2019.

    2018

  • 411. N. Østgaard, T. Neubert, Vi. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. First half year of TGF observations by ASIM. Invited talk at the AGU Fall Meeting in Washington DC, US, December 2018.

  • 410. T. Neubert, N. Østgaard, V. Reglero, E. Blanc, O. Chanrion, M. Heumesser, K. Dimitriadou,T. Farges, H. Christian, R. Blakeslee, C. Budtz-Jørgensen, I. Kuvvetli,I. Lundgaard Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg Observations of Lightning, TLEs and TGFs with the Atmosphere-Space Interactions Monitor on the International Space Station. Invited talk at the AGU Fall Meeting in Washington DC, US, December 2018.

  • 409. V. Reglero, N. Østgaard, T. Neubert, P. Connell, C. J. Eyles, J. Navarro, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, B. H. Oureshi, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen. Terrestrial Gamma ray Flashes Imaging. First results. Talk at the AGU Fall Meeting in Washington DC, US, December 2018.

  • 408. O. Chanrion, T. Neubert, S. A Cummer, M. Heumesser, K. Dimitriadou, N. Østgaard, V. Reglero, R. J. Blakeslee, K. Virts, H. J. Christian, I. L. Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen. Comparison of observations of thunderstorms from the ASIM optical module and from ground-based instrumentation. AGU Fall Meeting in Washington DC, US, December 2018.

  • 407. A. Mezentsev , N. Østgaard, P. Kochkin , K. Ullaland, N. Lehtinen, M. Marisaldi, T. Neubert, V. Reglero, S. Yang, G. Genov, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. Peculiarities of High Flux Terrestrial Gamma-Ray Flashes Detected by Atmosphere-Space Interaction Monitor. AGU Fall Meeting in Washington DC, US, December 2018.

  • 406. P. Kochkin, N. Østgaard, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, M. Marisaldi, A. Mezentsev, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg, C. Maiorana, C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, Ma. Heumesser, J. Navarro-Gonzales, P. Connell, C. Eyles. Performance of MXGS detector in Terrestrial Gamma-Ray Flash detection by Atmospheric-Space Interactions Monitor on the International Space Station. AGU Fall Meeting in Washington DC, US, December 2018.

  • 405. K. Dimitriadou, O. Chanrion, T. Neubert, M. Heumesser, Nikolai Østgaard, V. Reglero, T. Farges, R. Blakeslee, K. Virts, H. Christian, F. Gordillo-Vazquez, I. L. Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen. First observations of lightning and TLEs by ASIM on the International Space Station AGU Fall Meeting in Washington DC, US, December 2018.

  • 404. M. Heumesser, O. Chanrion, T. Neubert, K. Dimitriadou1, N. Østgaard, V. Reglero, T. Farges, R. Blakeslee, K. Virts, H. Christian, F. Gordillo-Vazquez, I. . Rasmussen, C. Stoltze, D. Tcherniak, N. C. Jessen, J. Polny, P. Brauer, J. E. Balling, S. S. Kristensen, C. Budtz-Jørgensen, I. Kuvvetli, S. Forchhammer, P. Davidsen, O. Mikkelsen, C. G. Petersen, M. Lorenzen, K. Ullaland, S. Yang, G. Genov, A. Mezentsev, P. Kochkin, N. Lehtinen, D. Sarria, B. H. Qureshi, A. Solberg. First observations of lightning associated with TGFs by ASIM on the International Space Station AGU Fall Meeting in Washington DC, US, December 2018.

  • 403. D. Sarria, N. Østgaard, H. J Christian, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, P. Kochkin, M. Marisaldi, N. Lehtinen, A. Mezentsev, S. Yang, R. Blakeslee. Modeling and constraining a gamma-ray glow observed at 20 km altitude during the FEGS/ALOFT campaign. AGU Fall Meeting in Washington DC, US, December 2018.

  • 402. C. Maiorana, M. Marisaldi, N. Østgaard, A. Ursi. New Design of AGILE Selection Criteria for TGFs. AGU Fall Meeting in Washington DC, US, December 2018.

  • 401. A. Lindanger , M. Marisaldi, K. Albrechtsen, N. Østgaard. Search for TGFs in AGILE data using time correlation with ground-based lightning data EGU General Assembly, Wien, Austria, April 2018, EGU2018-17656.

  • 400. M. Marisaldi, M. Galli, P. Bastia, C. Labanti, R. Campana, N. Østgaard, D. Sarria, S. Cummer, F. Liu, F. Fuschino, A. Ursi. Implications for Terrestrial Gamma-ray Flashes spectrum, flux and fine time structure at source based on the high-energy events observed by AGILE EGU General Assembly, Wien, Austria, April 2018, EGU2018-17358.

  • 399. K. M. Laundal, J. P. Reistad, N. Østgaard, P. Tenjord, K. Snekvik, A. Ohma. Interplanetary magnetic field Bx component influence on ionospheric currents. EGU General Assembly, Wien, Austria, April 2018, EGU2018-14172.

  • 398. K. Snekvik, N. Østgaard, P. Tenjord, A. Ohma, J. P. Reistad, K. M. Laundal. Response times of the two cell convection pattern in the ionosphere. EGU General Assembly, Wien, Austria, April 2018, EGU2018-13626.

  • 397. A. Ohma , N. Østgaard, K. M. Laundal, P. Tenjord, K. Snekvik, J. P. Reistad. Evolution of asymmetrically displaced footpoints during substorms. EGU General Assembly, Wien, Austria, April 2018, EGU2018-13293.

  • 396. A. Mezentsev, , N. Østgaard, H. J. Christian, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, P. Kochkin, M. Marisaldi, N. Lehtinen, D. Sarria. Search for gamma ray signatures from +IC upward leaders. EGU General Assembly, Wien, Austria, April 2018, EGU2018-7871.

  • 395. D. Sarria, P. Kochkin, N. Lehtinen, N. Østgaard. Modeling the 511 keV background enhancement in theunderstorms. EGU General Assembly, Wien, Austria, April 2018, EGU2018-7279.

  • 394. C. A. Skeie, N. Østgaard, P. Kochkin. On high-energy radiation inside aircraft in thunderstorm environment. EGU General Assembly, Wien, Austria, April 2018, EGU2018-7129.

  • 393. P. Kochkin, N. Østgaard, H. J. Christian, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, M. Marisaldi, N. Lehtinen, A. Mezentsev, D. Sarria. Gamma-ray glow termination dilemma. EGU General Assembly, Wien, Austria, April 2018, EGU2018-6876.

  • 392. K. M. Laundal, C.C. Finlay, N. Olsen, J.P. Reistad, P. Tenfjord, N. Østgaard , A. Ohma, K. Snekvik, S. E. Haaland, S.E. Milan A new empirical model of the total ionospheric current - performance on different time scales.EGU General Assembly, Wien, Austria, April 2018, EGU2018-5350.

  • 391. J. P. Reistad, K. M. Laundal, N. Østgaard, A. Ohma, K. Snekvik, P. Tenfjord Plasma circulation inside the polar cap and lobe reconnection. EGU General Assembly, Wien, Austria, April 2018, EGU2018-4485.

  • 390. M. Hesse, M. Kuznetsova, Y-H Liu, L. Raststatter, N. Østgaard, J. Birn, On the magnetospheric origin of nonconjugate auroral features. EGU General Assembly, Wien, Austria, April 2018, EGU2018-3286.

  • 389. C. Rutjes,D. Sarria, A. B. Skeltved, A. Luque, G. Dintz, N. Østgaard, U. Ebert. Evaluation of Monte Carlo tools for high energy atmospheric physics II : relativistic runaway electron avalanches. EGU General Assembly, Wien, Austria, April 2018. EGU2018-3264.

  • 388. P. Tenfjord, N. Østgaard, S. Haaland, K. Snekvik, K. M. Laundal,J.P. Reistad, R. Strangeway, S. E. Milan, M. Hesse. How the IMF By induces a local By component during northward IMF Bz and characteristic timescales. EGU General Assembly, Wien, Austria, April 2018. EGU2018-2744.

  • 387. N. Østgaard H. J. Christian, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, P. Kochkin, M. Marisaldi, N. Lehtinen, A. Mezentsev, D. Sarria. Gamma-ray glow observations at 20 km altitude. EGU General Assembly, Wien, Austria, April 2018. EGU2018-2566.

  • 386. N. Østgaard , J. P. Reistad, P. Tenfjord, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, M. Hesse, S. Milan, A. Ohma. The asymmetric geospace as displayed during the geomagnetic storm on August 17, 2001. EGU General Assembly, Wien, Austria, April 2018. EGU2018-2553.

    2017

  • 385. N. Østgaard H. J. Christian, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, P. Kochkin, M. Marisaldi. Gamma-ray observations at 20 km altitude above thunderstorms . AGU fall meeting, New Orleans, December 2017, USA.

  • 384. A. Ohma, N. Østgaard, J.P. Reistad , P. Tenfjord, K. M. Laundal, K. Snekvik, M. Fillingim. Evolution of asymmetric displaced footpoints during substorms. AGU fall meeting, New Orleans, December 2017, USA.

  • 383. K. Albrechtsen , N. Østgaard, M. Marisaldi, N. Berge, T. Gjesteland. Estimating the global production rate of TGFs. AGU fall meeting, New Orleans, December 2017, USA.

  • 382. N. G. Lehtinen , B. E. Carlson, P. Kochkin, N. Østgaard Mechanisms important to later stages of streamer system development. AGU fall meeting, New Orleans, December 2017, USA.

  • 381. D. Sarria, P. Kochkin, N. Østgaard Modeling aircraft-based detections of 511 keV bakground enhancements observed in thunderstorms. AGU fall meeting, New Orleans, December 2017, USA.

  • 380. P. Kochkin, D. Sarria, A. P. J. van Deursen, A. I. de Boer, M. Bardet, C. Allasia, F. Flourens, N. Østgaard Positron annihilation in thunderstorms observed by ILDAS. AGU fall meeting, New Orleans, December 2017, USA.

  • 379. J.P. Reistad, N. Østgaard, K. M. Laundal, P. Tenfjord, K. Snekvik, S. E. Haaland, S.E. Milan, A. Ohma, A. Grocott, K. Oksavik The influence of plasma flows bringing the magnetotail back to a more symmetric configuration. AGU fall meeting, New Orleans, December 2017, USA.

  • 378. K. M. Laundal, J.P. Reistad, P. Tenfjord, K. Snekvik, N. Østgaard. Seasonal and IMF-controlled variations in the large-scale true horizontal ionospheric current. AGU fall meeting, New Orleans, December 2017, USA.

  • 377. S. Haaland, B.Lybekk, L.Maes, K. Laundal, A.Pedersen, P. Tenfjord, A. Ohma, N.Ostgaard, J. Reistad, K.Snekvik. Cluster observations of magnetospheric asymmetries: North-South asymmetries in cold plasma density, Cluster workshop 2017

  • 376. S. Haaland, N. Østgaard , F. Søraas, K. Olksavik, K. Olafsson Looking South for the Northern Light: Substorm Physics as University Curriculum.ICS13, University of New Hampshire, US.

  • 375. K. M. Laundal, C.C. Finlay, N. Olsen, J.P. Reistad, P. Tenfjord, N. Østgaard , A. Ohma, K. Snekvik, S. E. Haaland, S.E. Milan North-south asymmetries in polar ionospheric currents - effects of asymmetries in the main magnetic field.IUGG Joint Assembly 2017 IUGG, Cape Town, South Africa.

  • 374. K. M. Laundal, C.C. Finlay, N. Olsen, J.P. Reistad, P. Tenfjord, N. Østgaard , A. Ohma, K. Snekvik, S. E. Haaland, S.E. Milan Developing and Using Realistic External Source Models for imaging global deep Earth conductivity with Satellite and Ground-based Data.IUGG Joint Assembly 2017 IUGG, Cape Town, South Africa.

  • 373. N. Østgaard, M. Marisaldi, K. Albrechtsen, P. Kochkin, N. G. Lehtinen, A. Mezentsev, A. B. Skeltved A Synergic Approach to the Study of TGFs and Energetic Radiation from Thunderstorms. IUGG Joint Assembly 2017 IUGG, Cape Town, South Africa.

  • 372. P. Kochkin, A. P. J. van Deursen, A. I. de Boer, M. Bardet, C. Allasia, J. -F. Boissin, N. Østgaard In-flight observation of long duration gamma-ray glows by aircraft. ICOLSE, Winc Aichi, Nagoya, Aichi, Japan, September 2017.

  • 371. M. Marisaldi, N. Østgaard, K. Albrechtsen, P. Kochkin, N. G. Lehtinen, A. Mezentsev, A. B. Skeltved A Synergic Approach to the Study of TGFs and Energetic Radiation from Thunderstorms. 32nd URSI General Assembly, Montreal, Canada, August 2017

  • 370. P. Kochkin, A. P. J. van Deursen, A. I. de Boer, M. Bardet, C. Allasia, J. -F. Boissin, N. Østgaard Thunderstorm high-energy radiation measured in-flight. 32nd URSI General Assembly, Montreal, Canada, August 2017. .

  • 369. A. Ohma, N. Østgaard, Evolution of asymmetrically displaced footpoints during substorms. EGU General Assembly, Wien, Austria, April 2017, EGU2017-18188.

  • 368. S. Milan, N. Østgaard Seasonal variations in Birkeland current response to solar wind-magnetosphere coupling. EGU General Assembly, Wien, Austria, April 2017, EGU2017-17861.

  • 367. K. M. Laundal, C. C. Finlay, N. Olsen, J. P. Reistad, P. Tenfjord, K. Snekvik, N. Østgaard, A new parametrized model of the global horizontal and vertical ionospheric current system. EGU General Assembly, Wien, Austria, April 2017, EGU2017-14741.

  • 366. K. Albrechtsen and N. Østgaard, Assessment of the cutoff of a broken power law fitted to RHESSI data. EGU General Assembly, Wien, Austria, April 2017, EGU2017-13323.

  • 365. M. Marisaldi, M. Galli, A. Ursi, M. Tavani, C. Labanti, F. Fuschino, N. Østgaard, S. Cummer, F. Lyu. On the high-energy spectral component of TGFs detected by AGILE. EGU General Assembly, Wien, Austria, April 2017, EGU2017-12652.

  • 364. P. Tenfjord, N. Østgaard, R. J. Strangeway, J. Reistad, K. M. Laundal, S. Haaland, M. Hesse, K. Snekvik, and S. E. Milan How the IMF By induces a By-component on closed field lines during northward IMF Bz. EGU General Assembly, Wien, Austria, April 2017, EGU2017-12331.

  • 363. A. Mezentsev, N. Lehtinen, N. Østgaard, J. Perez-Invernon, S. Cummer Spectral characteristics of VLF sferics associated with TGFs. EGU General Assembly, Wien, Austria, April 2017, EGU2017-11285.

  • 362. A. B. Skeltved, N. Østgaard, A. Mezentsev, N. Lehtinen, B. Carlson. Constraints to do realistic modeling of the electric field at the tip of a lightning leader. EGU General Assembly, Wien, Austria, April 2017, EGU2017-8093.

  • 361. J. P. Reistad, N. Østgaard,K. M. Laundal, P. Tenfjord, K. Snekvik, S. Haaland, S. Milan, A. Ohma, A. Grocott, K. Oksavik. When and where is the process of restoring symmetry important? EGU General Assembly, Wien, Austria, April 2017, EGU2017-8045.

  • 360. R. Torkelsen, N. Østgaard, P. Kochkin. Fourier analysis of high-frequency current oscillations measured in high-voltage electrical discharge experiments in the laboratory. EGU General Assembly, Wien, Austria, April 2017 EGU2017-7662.

  • 359. N. L. Berge, N. Østgaard, K. H. Albrechtsen. Optimization of Selection Criteria for Weak Signal TGFs. EGU General Assembly, Wien, Austria, April 2017, EGU2017-7644.

  • 358. N. Lehtinen, P. Kochkin, sN. Østgaard Mechanisms of X-ray production in laboratory streamers. EGU General Assembly, Wien, Austria, April 2017, EGU2017-7332.

  • 357. P. Kochkin, A. P. J. van Deursen, A. I. de Boer, M. Bardet, C. Allasia, J. -F. Boissin, N. Østgaard. In-flight observation of long duration gamma-ray glows by aircraft. EGU General Assembly, Wien, Austria, April 2017, EGU2017-7186.

  • 356. N. Østgaard , J. P. Reistad, P. Tenfjord, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, M. Hesse, S. Milan. The asymmetric geospace - the most common state of the system. EGU General Assembly, Wien, Austria, April 2017, EGU2017-6620.

  • 355. N. Østgaard, M. Marisaldi, P. Kochkin, N. Lehtinen, A. Mezentsev, A. Skelted, K. Albrechtsen. How should we define terrestrial gamma-ray flashes? EGU General Assembly, Wien, Austria, April 2017, EGU2017-6511.

  • 354. K. Snekvik, N. Østgaard, P. Tenfjord, J. P. Reistad, K. M. Laundal, S. E. Milan, and S. E. Haaland Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection. EGU General Assembly, Wien, Austria, April 2017 EGU2017-6390.

  • 353. M. Hesse, M. Kuznetsova, Y-H Liu, L. Raststatter, N. Østgaard, J. Birn, The roles of IMF By, dipole tilt, and conductance differences in establishing nonconjugate auroral features. EGU General Assembly, Wien, Austria, April 2017, EGU2017-3625.

  • 352. N. Østgaard, Conjugate auroral imaging: How asymmetric can geospace be ? Magnetic storm 17 aug 2001. Invited talk at the SMILE Consortium meeting at ESTEC, Noordwijk, Netherlands, February 2017,

  • 351. N. Østgaard, Norwegian contributions to SCOSTEP/VarSITI. Invited talk at the United Nation, Committee on Peaceful Uses of Outer Space (UNCOPUOS) in Vienna, Austria, January 2017,

    2016

  • 350. N. Østgaard , J.P. Reistad, P. Tenfjord, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, S. Milan. The asymmetric geospace during the magnetic storm on August 17, 2001. AGU fall meeting, San Francisco, December 2016, USA.

  • 349. A. Mezentsev, N. Østgaard, S. Cummer. Sperical characteristics of VLF sferics associated with TGFs. AGU fall meeting, San Francisco, December 2016, USA.

  • 348. K. M. Laundal, J. P. Reistad, N. Østgaard, P. Tenfjord, K. Snekvik, S. Haaland and S. E. Milan IMF Bx effects in the ionospheric current system AGU fall meeting, San Francisco, December 2016, USA.

  • 347. K. Albrechtsen, N. Østgaard. Characteristics of weak TGFs in RHESSI data. AGU fall meeting, San Francisco, December 2016, USA.

  • 346. P. Tenfjord, N. Østgaard, K. Snekvik, S. Haaland, J. P. Reistad, K. M. Laundal and S. E. Milan How the IMF By induces a By component on closed field lines during northward IMF Bz AGU fall meeting, San Francisco, December 2016, USA.

  • 345. A. B. Skeltved, N. Østgaard, A. Mezentsev, N. Lehtinen, B. Carlson. Constraints to do realistic modeling of electric field at the tip of a lightning leader. AGU fall meeting, San Francisco, December 2016, USA.

  • 344. S. Sembay, G. Branduardi-Raymont, P. Drumm, C. P. Escoubet, W. Fei, G. Genov, J. Gow, D. Hall, A. Holland, R. Hudec, J. M. Mas-Hesse, T. Kennedy, K. D. Kuntz, R. Nakamura, N. Østgaard, R. Ottensamer, Walfried Raab, A. Read, D. Rebuffat, J. Romstedt, E. Schyns, D. Sibeck, A. Srp, M. Steller, T. Sun, J. Sykes, J. Thornhill, B. Walsh1, D. Walton, C. Wang, A. Wielders, I. Whittaker The Soft X-ray Imager (SXI) on the SMILE mission. AGU fall meeting, San Francisco, December 2016, USA.

  • 343. M. Marisaldi, M. Galli, A. Ursi, M. Tavani, C. Labanti, F. Fuschino, N. Østgaard, S. Cummer, F. Lyu Assessment of the high-energy spectral component of TGFs AGU fall meeting, San Francisco, December 2016, USA.

  • 342. Nikolai G. Lehtinen, Pavlo O. Kochkin, and Nikolai Østgaard X-ray production in a laboratory streamer discharge AGU fall meeting, San Francisco, December 2016, USA.

  • 341. P. Kochkin, N. Lehtinen, J. Montanyá, A.P.J. van Deursen, N. Østgaard Neutron bursts from long laboratory sparks. AGU fall meeting, San Francisco, December 2016, USA.

  • 340. N. Østgaard, J.P. Reistad, P. Tenfjord, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, S. Milan. The asymmetric system during the magnetic storm on August 17, 2001. Invited talk at ISROSES, Golden Sands, Bulgaria, 12-16 September, 2016.

  • 339. N. Lehtinen, P. Kochkin, N. Østgaard. Modeling of laboratory streamer discharge features associated with observations of x-ray emissions. Frontiers of Nonlinear Physics, Nizhny Novgorod, Russia, July 2016.

  • 338. N. Østgaard, P. Tenfjord, J.P. Reistad, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, S. Milan.. Asymmetric field aligned currents into the conjugate hemispheres. Invited talk at the Chapman conference on Currents in Geospace and beyond, Dubrovnik, Croatia, May 2016.

  • 337. J. P. Reistad, N. Østgaard, P. Tenfjord, K. Snekvik, K. M. Laundal, S. Haaland, S. E. Milan, A. Grocott, H. Frey, K. Oksavik. Dynamic effects of restoring footpoint symmetry on closed magnetic field-lines: Importance of Birkeland currents on the untwisting process Chapman conference on Currents in Geospace and beyond, Dubrovnik, Croatia, May 2016.

  • 336. K. M. Laundal, C.C. Finlay, N. Olsen, S.E. Haaland, N. Østgaard, J.P Reistad, P. Tenfjord, K. Snekvik, J.W. Gjerloev. The relationship between the ionospheric current system and magnetic field perturbations on ground and in space. Chapman conference on Currents in Geospace and beyond, Dubrovnik, Croatia, May 2016.

  • 335. M. Marisaldi, A. Argan, A. Ursi, T. Gjesteland, F. Fuschino, C. Labanti, M. Galli, M. Tavani, C. Pittori, F. Verrecchia, F. D´Amico, N. Østgaard, S. Mereghetti, R. Campana, P. W. Cattaneo, A. Bulgarelli,1 S. Colafrancesco, S. Dietrich, F. Longo, F. Gianotti, A. Rappoldi, M. Trifoglio, A. Trois. One year of AGILE Terrestrial Gamma-Ray Flashes in the enhanced configuration EGU meeting, Vienna, Austria, April 2016.

  • 334. T. Gjesteland, N. Østgaard, . Stereo observations of Terrestrial Gamma-ray Flashes. EGU meeting, Vienna, Austria, April 2016.

  • 333. A. Mezentsev, N. Østgaard, T. Gjesteland. Radio emissions from RHESSI TGFs. EGU meeting, Vienna, Austria, April 2016.

  • 332. N. Østgaard, J.P. Reistad, P. Tenfjord, K. M. Laundal, T. Rexer, S. Haaland, K. Snekvik, S. Milan. Asymmetric aurora in the conjugate hemispheres during the magnetic storm on August 17, 2001. EGU meeting, Vienna, Austria, April 2016.

  • 331. S. Coyle, N. Østgaard, T. Gjesteland. Search for weak TGFs in the RHESSI data by using conjunctions of TRMM and RHESSI orbits. EGU meeting, Vienna, Austria, April 2016.

  • 330. A. B. Skeltved, N. Østgaard, . Estimating the electric field at the tip of lightning leaders. EGU meeting, Vienna, Austria, April 2016.

  • 329. N. Lehtinen, N. Østgaard, P. Kochkin. Modeling of laboratory streamer discharge features leading to x-ray emissions. EGU meeting, Vienna, Austria, April 2016.

  • 328. K. Albrechtsen, N. Østgaard, T. Gjesteland. A new population of TGFs in RHESSI data. EGU meeting, Vienna, Austria, April 2016.

  • 327. P. Tenfjord, N. Østgaard, . How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres. Invited talk at the EGU meeting, Vienna, Austria, April 2016.

    2015

  • 326. N. Østgaard, T. Gjesteland, H. J. Christian, K. Albrechtsen, B. Carlson, A. B. Collier, S. Cummer, G. Lu. The sequence of events in a lightning stroke: terrestrial gamma ray flash, radio signal and optical lightning. AGU fall meeting, San Francisco, December 2015, USA.

  • 325. N. G. Lehtinen, N. Østgaard, P. O. Kochkin. Modeling of the laboratory streamer discharge. AGU fall meeting, San Francisco, December 2015, USA.

  • 324. J. P. Reistad, N. Østgaard, P. Tenfjord, K. Snekvik, K. M. Laundal, S. Haaland, S. E. Milan, A. Grocott, H. Frey, K. Oksavik. On the importance of magnetotail untwisting. AGU fall meeting, San Francisco, December 2015, USA.

  • 323. K. M. Laundal, S. Haaland, N. Østgaard, J. P. Reistad, P. Tenfjord, K. Snekvik, S. E. Milan. Birkeland current effects on high-latitude ground magnetic field perturbations AGU fall meeting, San Francisco, December 2015, USA.

  • 322. K. Snekvik, P. Tenfjord, N. Østgaard, K. M. Laundal, J. P. Reistad, S. E. Milan, S. Haaland. Solar wind ionosphere coupling times from the dayside to the nightside as observed by AMPERE AGU fall meeting, San Francisco, December 2015, USA.

  • 321. P. Tenfjord, N. Østgaard, R. J. Strangeway, J. P. Reistad, K. Snekvik, K. M. Laundal, S. Haaland, S. E. Milan. On which timescales are By induced in the closed magnetosphere? AGU fall meeting, San Francisco, December 2015, USA.

  • 320. N. Østgaard How is Earth coupled to space? Invited talk at UIB: Forskning og Formidling, November 2015.

  • 319. N. Østgaard How is Earth coupled to space? Invited talk at Norges Geofysiske Selskap - annual meeting, Solstrand, October 2015.

  • 318. N. Østgaard, J.P. Reistad, P. Tenfjord, K. M. Laundal, S. Haaland, K. Snekvik, S. Milan. Unanswered questions regarding solar wind - magnetosphere interaction., Invited talk at the Workshop on UNSOLVED PROBLEMS IN MAGNETOSPHERIC PHYSICS 6-12th September, 2015 Crown Spa Hotel, Scarborough, UK.

  • 317. N. Østgaard, T. Gjesteland, B. E. Carlson, A. B. Collier, S. Cummer, G. Lu, H. J. Christian. Simultaneous observations of optical lightning and terrestrial gamma flash from space and radio signals on ground, Invited talk at the 26th IUGG, General Assembly 2015, June 22-July 2, 2015, Prague, Czech Rep.

  • 316. Tenfjord, Paul ; Østgaard, Nikolai; Haaland, Stein; Milan, Steve; Laundal, Karl Magnus; Reistad, Jone Peter; Snekvik, Kristian. The Impact of IMF By on the Magnetosphere-Ionosphere System. GEM 2015 Summer Workshop; 2015-06-14 - 2015-06-19

  • 315. J. P. Reistad, N. Østgaard, K. M. Laundal, P. Tenfjord, K. Snekvik, S. E. Milan, S. Haaland, K. Oksavik, H. Frey, A. Grocott. On the importance of magnetotail untwisting. GEM 2015 Summer Workshop; 2015-06-14 - 2015-06-19

  • 314. K. M. Laundal , N. Olsen, C. Finlay, N. Østgaard, P. Tenfjord, J. Reistad, K. Snekvik. Statistical maps of Birkeland currents from Swarm magnetometer measurements. 26th IUGG, General Assembly 2015, June 22-July 2, 2015, Prague, Czech Rep.

  • 313. N. Østgaard, How is Earth coupled to space?, Invited, key-note speaker at the 22th ESA Symposium on European Rocket and Balloon Programmes and related Research, June 7-12, 2015, Tromsø, Norway.

  • 312. K. M. Laundal , M. Förster, K. Snekvik, N. Østgaard, J. Reistad, P. Tenfjord, S. Milan. Effects of electric field component representation on estimated cross polar cap potential - Implications for interhemispheric asymmetries. SuperDARN workshop, 1-5 June, 2015, University of Leicester, UK.

  • 311. T. Rexer, N. Østgaard, J. P. Reistad, K. M. Laundal. Current systems associated with Non-Conjugate Aurora. EGU meeting, 2015, Vienna, Austria.

  • 310. N. Østgaard, B. E. Carlson, Ø. Grøndahl, P. Kochkin, R. S. Nisi, T. Gjesteland. Search for relativistic electrons in laboratory discharge experiments. EGU meeting, 2015, Vienna, Austria.

  • 309. N. G. Lehtinen and N. Østgaard. Dimension of a fractal streamer structure. EGU meeting, 2015, Vienna, Austria.

  • 308. A. Mezentsev, N. Østgaard, T. Gjesteland, A. Skeltved, S. Cummer. VLF sferics associated with TGFs. EGU meeting, 2015, Vienna, Austria.

  • 307. V. Aamodt, N. Østgaard, T. Gjesteland, B. E. Carlson, A. Collier. Search for Terrestrial Electron Beams (TEBs) in SAMPEX data. EGU meeting, 2015, Vienna, Austria.

  • 306. K. Albrectsen, N. Østgaard, T. Gjesteland, A. Collier. Do all lightning produce TGFs?.Approaching this question using data from RHESSI and WWLLN. EGU meeting, 2015, Vienna, Austria.

  • 305. J. P. Reistad, N. Østgaard, P. Tenfjord, K. Snekvik, K. M. Laundal, S. Milan, K. Oksavik. Are there auroral signatures related to asymmetric generation of field-aligned currents in the tail due to an IMF By induced twist? EGU meeting, 2015, Vienna, Austria.

  • 304. K. Snekvik, K. M. Laundal, N. Østgaard, P. Tenfjord, J. P. Reistad, S. Milan, S. Haaland. Magnetic field patterns near the polar cap boundary. EGU meeting, 2015, Vienna, Austria.

  • 303. A. B. Skeltved , N. Østgaard, T. Gjesteland, B. Carlson. Modeling the production and acceleration of runaway electrons in strong inhomogeneous electric fields with GEANT4. EGU meeting, 2015, Vienna, Austria.

  • 302. P. Tenfjord, K. Snekvik, N. Østgaard, K. M. Laundal, J. P. Reistad, S. Milan, S. Haaland. Generation of Birkeland Currents during IMF By; Mechanisms and theory. EGU meeting, 2015, Vienna, Austria.

  • 301. T. Gjesteland , H. Christian, N. Østgaard. An observation of a TGF from the convective core of a thundercloud. EGU meeting, 2015, Vienna, Austria.

  • 300. K. M. Laundal , M. Förster, K. Snekvik, N. Østgaard, J. Reistad, P. Tenfjord, S. Milan. Effects of electric field component representation on estimated cross polar cap potential - Implications for interhemispheric asymmetries. EGU meeting, 2015, Vienna, Austria.

    2014

  • 299. P. Tenfjord, N. Østgaard, K. Snekvik, K. M. Laundal, J. P. Reistad. Generation of Field Aligned Currents during IMF By; mechanisms and theory. AGU fall meeting, San Francisco, December 2014, USA.

  • 298. A. Infanger, D. M Smith, T. Gjesteland, N. Østgaard, P. Buzbee Toward an optimized Third Catalog of RHESSI TGFs. AGU fall meeting, San Francisco, December 2014, USA.

  • 297. N. Østgaard, B. E. Carlson, Ø. Grøndahl, P. Kochkin, R. S. Nisi, T. Gjesteland. Search for X-rays and relativistic electrons in laboratory discharge experiments. AGU fall meeting, San Francisco, December 2014, USA.

  • 296. N. G. Lehtinen , N. Østgaard, U. S. Inan. Dynamics of a streamer structure. AGU fall meeting, San Francisco, December 2014, USA.

  • 295. K. M. Laundal , N. Østgaard, J. P. Reistad, P. Tenfjord, K. Snekvik, Seasonal differences in ionospheric current rise and decay times. AGU fall meeting, San Francisco, December 2014, USA.

  • 294. J. P. Reistad, N. Østgaard, K. M. Laundal, K. Snekvik, P. Tenfjord, K. Oksavik. Hemispheric differences in solar wind - magnetosphere interactions. Invited talk at the AGU fall meeting, San Francisco, December 2014, USA.

  • 294. N. G. Lehtinen , U. S. Inan, N. Østgaard, On the Spatial Scale of Streamers. Talk at the General Assembly and Scientific Symposium of International Union of Radio Science (URSI), August 17-23, 2014, Beijing, China

  • 293. N. Østgaard, T. Gjesteland, B. E. Carlson, A. B. Collier, S. Cummer, G. Lu, H. J. Christian. First simultaneous observations of optical lightning and terrestrial gamma flash from space, Invited talk at the General Assembly and Scientific Symposium of International Union of Radio Science (URSI), August 17-23, 2014, Beijing, China

  • 291. J. P. Reistad, N. Østgaard, K. M. Laundal, K. Oksavik. Conjugate and non-conjugate aspects of the aurora. Invited talk at The Annual Summer CEDAR Workshop, 2014, June 22-26, Seattle, USA.

  • 291. J. P. Reistad, N. Østgaard, K. M. Laundal, S. Haaland, P. Tenfjord, K. Oksavik, and S. E. Milan. Hemispheric asymmetries in the global aurora and IMF Bx. The Annual Summer CEDAR Workshop, 2014, June 22-26, Seattle, USA.

  • 290. N. Østgaard TGF observations. Invited lecture at the TEA-IS Summer School, Collioure, France, 23-27 June , 2014

  • 289. A. B. Skeltved , N. Østgaard, T. Gjesteland, B. Carlson. Modelling the runaway electron avalanche and the feedback mechanism with GEANT4. TEA-IS Summer School, Collioure, France, 23-27 June , 2014

  • 288. K. Albrectsen, S. Coyle , N. Østgaard, T. Gjesteland, A. Collier. Do all lightning produce TGFs?. TEA-IS Summer School, Collioure, France, 23-27 June , 2014

  • 287. V. Aamodt, N. Østgaard, T. Gjesteland, B. E. Carlson, A. Collier. Search for Terrestrial Electron Beams (TEB) in SAMPEX data. TEA-IS Summer School, Collioure, France, 23-27 June , 2014

  • 286. N. G. Lehtinen,U. S. Inan, N. Østgaard. On the spatial scale of streamers. TEA-IS Summer School, Collioure, France, 23-27 June , 2014

  • 285. J. Montanyà, F. Fabró, O. van der Velde, D. Aranguren, E. Williams, C. Morales, H. D. Betz, T. Gjesteland, N. Østgaard, S. Soula, N. Pineda, D. Smith, Lightning activity and radar for a TGF case in Colombia 15th International Commission on Atmospheric Electricity conference (ICAE2014), Norman, Oklahoma, USA, 14-19 June 2014.

  • 284. N. Østgaard Birkeland Centre for Space SCience. Invited talk at the SuperDARN workshop 25-30th May, UNIS Svalbard, 2014

  • 283. J. P. Reistad, N. Østgaard, K. M. Laundal, S. Haaland, P. Tenfjord, K. Oksavik Comparison of solar wind driving of the aurora in the two hemispheres due to solar wind dynamo. EGU meeting 27 april - 5 may, 2014, Wien, Austria.

  • 282. A. B. Skeltved, N. Østgaard, B. E. Carlson, T. Gjesteland A study of the runaway relativistic electron avalanche and the feedback theory using GEANT4. EGU meeting 27 april - 5 may, 2014, Wien, Austria.

  • 281. T. Gjesteland, N. Østgaard, R. S. Nisi, A. Collier, D. M. Smith, S. A. Cummer, G. Lu. Twelve Years of RHESSI TGFs - The second RHESSI TGF catalog.. EGU meeting 27 april - 5 may, 2014, Wien, Austria.

  • 280. R. S. Nisi , N. Østgaard, T. Gjesteland An altitude and distance correction to the initial fluence distribution of TGFs. EGU meeting 27 april - 5 may, 2014, Wien, Austria.

  • 279. N. Østgaard, B. E. Carlson, Ø. Grøndahl, P. Kochkin, R. S. Nisi, T. Gjesteland. Search for X-rays and relativistic electrons in laboratory discharge experiments. EGU meeting 27 april - 5 may, 2014, Wien, Austria.

  • 278. N.A. Kelley, D.M. Smith, G.S. Bowers, P. Buzbee, F. Martinez-Mckinney, J.R. Dwyer, E.S. Cramer, H. Rassoul, S.A. Cummer, G. Lu, A. Infanger, R.H. Holzworth, M.L. Hutchings, M.E. Splitt, S.M. Lazarus, T. Gjesteland, N. Østgaard. Recent Results from ADELE and RHESSI. URSI meeting 8-11 Jan., Boulder, Colorado, USA.

    2013

  • 277. N.A. Kelley, D.M. Smith, G.S. Bowers, P. Buzbee, F. Martinez-Mckinney, J.R. Dwyer, E.S. Cramer, H. Rassoul, S.A. Cummer, G. Lu, A. Infanger, R.H. Holzworth, M.L. Hutchings, M.E. Splitt, S.M. Lazarus, T. Gjesteland, N. Østgaard. Recent Results from ADELE and RHESSI. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 276. B. E. Carlson, Z. Scherrer, K. Weber, K. LeCaptain, N. Østgaard, Ø. Grøndahl, P. Kochkin Spatial Correlations and Distributions in Energetic Electron Production by Meter­Scale Sparks. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 275. D. M. Smith, P. Buzbee, A. Infanger, J. R. Dwyer, S. A. Cummer, G. Lu, R. A. Holzworth, M. L. Hutchins, M. Splitt, S. Lazarus, T. Gjesteland, N. Østgaard. Results from the third RHESSI catalog of Terrestrial Gamma-ray Flashes. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 274. N. Østgaard, J.P. Reistad, P. Tenfjord, K. M. Laundal. What are the mechanisms that produce auroral asymmetries in the conjugate hemispheres? Invited talk at AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 273. J. P. Reistad, N. Østgaard, K. M. Laundal,S. Haaland, K. Oksavik Is there any significant intensity asymmetry between the northern and southern auroral ovals associated with the x-component of the interplanetary magnetic field?. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 272. T. Gjesteland, N. Østgaard, M. Marisaldi, F. Fuschino, E. Arnona, S. Laviola, A. Collier. Terrestrial Gamma ray Flashes observed over low clod tops. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 271. K. M. Laundal, N. Østgaard, J. P. Reistad. Solar wind dynamic pressure effect on global auroral intensity. AGU Fall meeting 9-13 Dec, San Francisco, USA.

  • 270. N. Østgaard. Jakten på jordiske gammaglimt. Invited talk at Senior University Fyllingsadlen, Bergen, Norway October 16, 2013

  • 269. T. Gjesteland, N. Østgaard, M. Marisaldi, F. Fuschino, E. Arnona, S. Laviola, A. Collier. Terrestrial Gamma ray Flashes observed over low clod tops. TEPA meeting, Artmenia, Sept 9-13, 2013.

  • 268. N. Østgaard. UV and X-ray imaging of aurora and other atmospheric phenomena. Invited talk at the European Planetary Science Congress 2013, University College, London, 8-13 sept. UK

  • 267. P. Tenfjords, N. Østgaard, K.M. Laundal, J. P. Reistad, S. Haaland The occurrence of interhemispheric currents in the ring current region as seen by the Cluster spacecraft. Cluster workshop, Tromsø, Norway August, 2013

  • 266. J. P. Reistad, S. Haaland, N. Østgaard, K. M. Laundal, K. Oksavik Investigation of the role og IMF Bx on magnetopause characteristics past the terminator. Cluster workshop, Tromsø, Norway August, 2013

  • 265. K. M. Laundal, N. Østgaard, J. P. Reistad, K. Oksavik. Non-conjugate features in the auroral ovals in the two hemispheres. Invited talk at AOGS meeting, Brisbane, Australia, 24-28 June, 2013.

  • 264. P. Tenfjords, N. Østgaard. Energy Transfer and Flow in the SolarWind-Magnetosphere-Ionosphere System: A New Coupling Function. GEM meeting, Snow Mass, Colorado, June 2013.

  • 263. J. P. Reistad, N. Østgaard, K. M. Laundal, K. Oksavik. How IMF Bx affects the two polar hemispheres differently. GEM meeting, Snow Mass, Colorado, June 2013.

  • 262. N. Østgaard. Terrestrial Gamma-ray Flashes - the most energetic photon phenomenon in our atmosphere. Invited talk at Norwegian PhD Network on Nanotechnology for Microsystems, Bergen, Norway June 17, 2013

  • 261. N. Østgaard. Jakten på jordiske gammaglimt. Invited talk at Christiekonferansen, Bergen, Norway April, 2013

  • 260. N. Østgaard, T. Gjesteland, B. E. Carlson, A. B. Collier, S. Cummer, G. Lu, H. J. Christian. First simultaneous observations of optical lightning and terrestrial gamma flash from space, EGU meeting Wien, April 2013.

  • 259. P. Tenfjords, N. Østgaard. Energy Transfer and Flow in the SolarWind-Magnetosphere-Ionosphere System: A New Coupling Function, EGU meeting Wien, April 2013.

  • 258. R. S. Hansen, N. Østgaard, B. Carlson, T. Gjesteland. Modeling of the Bremsstrahlung process in connection to Terrestrial gamma-ray flashes, EGU meeting Wien, April 2013.

  • 257. A. Collier, T. Gjesteland, N. Østgaard. Intensity of Lightning Associated with TGFs. EGU meeting Wien, April 2013.

  • 256. M. Liemohn, N Ganushkina, O. Amarieutei, I. Daglis, I. Dandouras, D. L. De Zeeuw, S. Dubyagin, Y. Ebihara, R. Ilie, R. Katus, M. Kubyshkina, S. Milan, S-I Ohtani, N. Østgaard, Jone P. Reistad, F. Toffoletto, S. Zaharia. Defining and Resolving Current Systems in Geospace. EGU meeting Wien, April 2013.

  • 255. T. Gjesteland, N. Østgaard, M. Marisaldi, F. Fuschino, E. Arnona, S. Laviola. Unusual bright TGF from low cloud tops over the Mediterranean sea. EGU meeting Wien, April 2013.

  • 254. A. B. Skeltved, N. Østgaard, B. Carlson, T. Gjesteland. A study of the relativistiv runaway electron avalanche and the feedback theories to explain terrestrial gammaray production. EGU meeting Wien, April 2013.

  • 253. J. P. Reistad, N. Østgaard, K. M. Laundal, K. Oksavik. How IMF Bx affects the two polar hemispheres differently. EGU meeting Wien, April 2013.

  • 252. N. Østgaard Terrestrial Gamma-ray Flashes - the most energetic photon phenomenon in our atmosphere. Invited talk at NTNU, Trondhjem, Norway, February, 2013

  • 251. N. Østgaard. Nye fenomener i romforskning - gammaglimt, blå jetter og røde ånder. Invited talk at Norges Tekniske Vitenskapsakademi, Januar 2013.

  • 250. N. Østgaard. Terrestrial gamma ray flashes, the most energetic photon phenomenon in our atmosphere. Invited talk at Institute of Theoretical Astrophysics, University of Oslo, Januar 2013.

    2012

  • 249. N. Østgaard, T. Gjesteland, R. S. Hansen, B. Carlson, A. Collier. The relation between TGF and lightning. Invited talk at AGU meeting San Francisco, December 2012.

  • 248. J. P. Reistad, N. Østgaard, K. Oksavik, K. M. Laundal. Asymmetric field-aligned currents in the conjugate hemispheres, AGU meeting San Francisco, December 2012.

  • 247. R. S. Hansen, N. Østgaard, T. Gjesteland, B. E. Carlson. Modeling of the Bremsstrahlung process in connection to Terrestrial gamma-ray flashes, AGU meeting San Francisco, December 2012.

  • 246. T. Gjesteland, N. Østgaard, R. S. Hansen, B. E. Carlson, A. Collier. Analysis of the recent RHESSI TGFs, AGU meeting San Francisco, December 2012.

  • 245. J. P. Reistad, N. Østgaard. Hemispheric differences in Solar Wind synamo induced currents, Space Weather and Challenges for Modern Society, Oslo, Oct, 2012.

  • 244. A. Collier, T. Gjesteland, N. Østgaard. Intensities of TGF source lightning, VERSIM meeting, Sao Paulo, Brazil, Sept, 2012.

  • 243. A. Collier, T. Gjesteland, N. Østgaard, B. Delport. Intensities of TGF source lightning, South African Society of Atmospheric Sciences, Cape Town, Sept, 2012.

  • 242. T. Gjesteland, N. Østgaard, A. Collier, B. Carlson, C. Eyles, D. M. Smith. Recent results from the new RHESSI TGFs. TEPA meeting, Moscow, July, 2012.

  • 241. N. Østgaard, B. Carlson, R. S. Hansen, T. Gjesteland, A. Collier. Invited How common are TGFs? TEPA meeting, Moscow, July, 2012.

  • 240. A. Orr, ASIM team. Atmosphere Space Interaction Monitor (ASIM). 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 239. B. E. Carlson, P. Kochkin, R. Hansen, O. Grondahl, T. Gjesteland, N. Østgaard, A. P. J van Deursen. Energetic radiation observations near meter-scale sparks in the laboratory. 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 238. T. Gjesteland, N. Østgaard, A. Collier, B. Carlson, C. Eyles, D. M. Smith. Recent results from the new RHESSI TGFs. 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 237. A. B. Skeltved, B. Carlson, N. Østgaard. The feedback theory concerning the production of terrestrial gamma-ray flashes. 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 236. R. Hansen, N. Østgaard, T. Gjesteland, B. Carlson. How simulated fluence of photons from Terrestrial Gamma ray flashes at aircraft and balloon altitudes depends on initial parameters. 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 235. N. Østgaard. Invited. Recent results in TGF research observations and theories. 1st TEA-IS Summer School, June 17th - June 22nd 2012, Malaga, Spain.

  • 234. N. Østgaard, The search for terrestrial gamma flashes. How common are they? Invited talk at Japan Norway symposium, Oslo, Norway, June 2012.

  • 233. B. Carlson, N. Østgaard, T. Gjesteland, R. Hansen, L. van Deursen, P. Kochin. A direct search for energetic electrons produced by laboratory sparks. EGU meeting Vienna, April 2012.

  • 232. M. Liemohn, N. Ganushkina, I. Daglis, I. Dandouras, Y. Ebihara, Ma. Kubyshkina, St. Milan, S. Ohtani, N. Østgaard, F. Toffoletto, S. Zaharia, S. Dubyagin, R. Ilie, D. De Zeeuw IonoResolving Current Systems in Geospace. EGU meeting Vienna, April 2012.

  • 231. P. Tenfjord, N. Østgaard. On the solar wind-magnetosphere energy coupling function. EGU meeting Vienna, April 2012.

  • 230. L. M. Bjoland, N. Østgaard, K. Oksavik, K. Atakan Ionospheric Signatures Associated with the 2008 Svalbard Earthquake. EGU meeting Vienna, April 2012.

  • 229. C. Johnsen, N. Østgaard, S. E. Haaland. Mass lost from the atmosphere through ion-outflow. EGU meeting Vienna, April 2012.

  • 228. R. Hansen, N. Østgaard, T. Gjesteland, B. Carlson. Fluence of photons from Terrestrial Gamma ray flashes in aircraft and balloon altitudes - dependence of initial parameters in simulations. EGU meeting Vienna, April 2012.

  • 227. J. P. Reistad, N. Østgaard, K. M. Laundal, K. Oksavik. Non-conjugate aurora and inter hemispheric currents. EGU meeting Vienna, April 2012.

  • 226. T. Gjesteland, N. Østgaard, A. Collier, B. Carlson, R. S. Hansen, C. Eyles, D. M. Smith. Many new Terrestrial Gamma Ray Flashes found in the RHESSI data. EGU meeting Vienna, April 2012.

  • 225. N. Østgaard, B. Carlson, R. S. Hansen, T. Gjesteland, A. Collier. How common are TGFs? EGU meeting Vienna, April 2012.

  • 224. S. Milan, J. Shi, M. Dunlop, A. Fazakerley, B. Hubert, B. Lavraud, N. Østgaard, P. Escoubet, M. Taylor, P. Falkner, A. Wielders. KuaFu - exploring the Sun-Earth connection. National Astronomy Meeting, UK, March, 2012.

    2011

  • 223. N. Østgaard, B. Carlson, R. S. Hansen, T. Gjesteland , A. Collier. The true distribution of TGF fluence measured from space. AGU meeting San Francisco, December 2011.

  • 222. T. Gjesteland, N. Østgaard, A. Collier, B. Carlson, R. S. Hansen, C. Eyles, E. Stopnitzky, D. M. Smith. Are there more TGFs in the RHESSI data? AGU meeting San Francisco, December 2011.

  • 221. N. Østgaard The global auroral response to solar wind - Earth magnetosphere coupling, Invited talk at the Transatlantic Science Week, U. C. Berkeley and Stanford University, California, October 25-28, 2011.

  • 220. N. Østgaard Auroral asymmetries in the conjugate hemispheres, Invited talk at International Symposium on Recent Observations and Simulations of the Sun-Earth System II, Borovets, Bulgaria, September 11-16, 2011.

  • 219. N. Østgaard Auroral asymmetries in the conjugate hemispheres, International Living With a Star Science Workshop, Beijing, August 28, 2011.

  • 218. A. Orr on behalf of the ASIM team, Atmosphere-Space Interaction Monitor for ISS, 4th International Symposium on Physical Sciences in Space, 11-15 July 2011, Bonn, Germany.

  • 217. B. E. Carlson, T. Gjesteland, N. Østgaard. The TGF source luminosity distribution. Huntsville workshop July, 2011.

  • 216. N. Østgaard, R. S. Hansen, T. Gjesteland, B. Carlson, A. Collier. Occurence frequency and fluence of TGFs. Huntsville workshop July, 2011.

  • 215. N. Østgaard, K.M. Laundal, j. Stadsned. Auroral asymmetries in the conjugate hemispheres. Invited talk at IAGA, Melbourn, Australia, June 2011.

  • 214. A. Collier, T. Gjesteland, N. Østgaard. Terrestrial Gamma-ray Flash Intensity Distribution. URSI meeting Istanbul, Turkey, August 2011.

  • 213. B. E. Carlson, T. Gjesteland, N. Østgaard. The frequency of Terrestrial Gamma-ray Flash Electron Beam Observations.URSI meeting Istanbul, Turkey, August 2011.

  • 212. T. Gjesteland, N. Østgaard, A. B. Collier, B. E. Carlson, M. B. Cohen, N. G. Lehtinen Confining the Angular Distribution of TGF Emission. URSI meeting Istanbul, Turkey, August 2011.

  • 211. J-B Renard J-L Pincon, N. Østgaard, G Berthet, N Brun-Huret, Imapct of recent results About TGFs and TLEs to the scientific return OF the cobrat project, 20th ESA Symposium on European Rocket and Balloon, 22-26 May 2011, Hyere - France.

  • 210. K. Snekvik E. Tanskanen, N. Østgaard, Flux cloaure during magnetotail reconnection, EGU, Vienna, Austria, April 3-8, 2011.

  • 209. B. Carlson, G. Fishman, M. S. Briggs, M. B. Cohen, N. Østgaard, R. K. Said, T. Gjesteland, V. Connaughton. Modeling TGF electron beams and constraints on the TGF source. EGU, Vienna, Austria, April 3-8, 2011.

  • 208. Y. Khotyaintsev, A. Retino, A. Vaivads, E. Kontar, H. Reid., J. Gosling., L.Vlahos., M. Fujimoto., S.Krucker., S. D. Bale, T. Neukirch., V. S. Semenov., N. Østgaard. Particle Acceleration During Solar Flares and Magnetospheric Substorms. EGU, Vienna, Austria, April 3-8, 2011.

  • 207. L. Juusola, N. Østgaard, E. Tanskanen. Statistics of Plasma Sheet Convection. EGU, Vienna, Austria, April 3-8, 2011.

  • 206. S. Haaland, F. Søraas, P. Daly, C. Johnsen, E. Georgescu, E. Krinberg, K. Oksavik, N. Østgaard. Determination of polar cap size and shape using energetic particles. EGU, Vienna, Austria, April 3-8, 2011.

  • 205. S. M. Vaktdal, N. Østgaard, T. Gjesteland, R. S. Hansen, A. Collier, B. Carlson. TGF dependence on magnetic latitude and solar zenith angle. EGU, Vienna, Austria, April 3-8, 2011.

  • 204. A. Collier,T. Gjesteland, N. Østgaard. Terrestrial Gamma-Ray Flash Intensity Distribution. EGU, Vienna, Austria, April 3-8, 2011.

  • 203. T. Gjesteland, N. Østgaard, A. Collier. Constrains on the Terrestrial Gamma-ray Flashes Emission Cone by Spectral Analysis of Geolocated Events. EGU, Vienna, Austria, April 3-8, 2011.

  • 202. N. Østgaard, R. S. Hansen, T. Gjesteland, B. Carlson, A. Collier. Occurence frequency and fluence of TGFs. EGU, Vienna, Austria, April 3-8, 2011.

  • 201. N. Østgaard, B. K. Humberset, L. Juusola, K.M. Laundal, S. E. Haaland, A.Aasnes, J. Weygand. Asymmetries of substorm onset location and the dynamic behavior of auroral substorms during expansion phase. EGU, Vienna, Austria, April 3-8, 2011.

  • 200. N. Østgaard, B. K. Humberset, K.M. Laundal, H. U. Frey, J. B. Sigwarth, A.Aasnes, J. Weygand. Auroral asymmetries in the conjugate hemispheres during substorm onset and expansion phase. Invited talk at AGU Chapman Conference, Fairbanks, Alaska, USA, Feb 28 - Mar 4, 2011.

    2010

  • 199. K. Snekvik E. Tanskanen, N. Østgaard, Flux cloaure during magnetotail reconnection, AGU fall meeting, San Francisco, USA, Dec 2010.

  • 198. N. Østgaard, K Snekvik, A. L. Borg, A. Åsnes, A. Pedersen, M. Øieroset, T. D. Phan, S. E. Haaland. Can magnetotail reconnection produce the auroral intensities observed in the conjugate ionosphere? Cluster 10th anniversary, Corfu, Sept 2010.

  • 197. K. Snekvik E. Tanskanen, N. Østgaard, E. I. Gordeev The solar wind influence on tail reconnection, talk at Geocosmos, St. Petersburg, Russia, September 20-24, 2010.

  • 196. K. Snekvik, L. Juusola ,N. Østgaard, O. Amm. Reconnection Hall current system observed in the magnetotail and in the ionosphere. Cluster workshop, Corfu, Sept 2010.

  • 195. N. Østgaard and K. M. Laundal Recent results from auroral conjugacy studies, Invited talk at The meeting of the Americas, Foz do Iguassu, Brazil, August 8-13, 2010.

  • 194. N. Østgaard, B. K. Humberset, K.M. Laundal, H. U. Frey, J. B. Sigwarth, A.Aasnes, J. Weygand. Auroral asymmetries in the conjugate hemispheres during substorm onset and expansion phase. IPY Oslo Science Conference, June 8-12, 2010.

  • 193. K. M. Laundal and N. Østgaard Asymmetric aurora detected in the two hemispheres simultaneously IPY Oslo Science Conference, June 8-12, 2010.

  • 192. I Häggstrøm, E Turunen1, N Østgaard Incoherent Scatter Polar Atmosphere Monitoring IPY Oslo Science Conference, June 8-12, 2010.

  • 191. K. Snekvik, L. Juusola ,N. Østgaard, O. Amm. Reconnection Hall current system observed in the magnetotail and in the ionosphere. IPY Oslo Science Conference, June 8-12, 2010.

  • 190. N. Østgaard, B. K. Humberset, K.M. Laundal, H. U. Frey, J. B. Sigwarth, A.Aasnes, J. Weygand. Auroral asymmetries in the conjugate hemispheres during substorm onset and expansion phase. EGU, Vienna, Austria, May 3-7, 2010.

  • 189. R. S. Hansen , N. Østgaard, Thomas Gjesteland, and Johann Stadsnes. Constraints for observing Terrestrial Gamma-ray Flashes by a high-altitude aircraft. EGU, Vienna, Austria, May 3-7, 2010.

  • 188. T. Gjesteland , N. Østgaard, Morris B. Cohen, and Nikolai G. Lehtinen. The angular distribution of Terrestrial Gamma ray Flashes (TGFs) measurements. EGU, Vienna, Austria, May 3-7, 2010.

  • 187. N. Østgaard and ASIM team. ASIM Challenges and possibilities.Invited talk at Agile 3rd anniversary and 8th workshop, Bologna, April 28, 2010.

    2009

  • 186. K. Snekvik, L. Juusola , O. Amm, N. Østgaard. Reconnection Hall current system observed in the magnetotail and in the ionosphere. AGU, San Francisco, USA, December, 2009.

  • 185. N. Østgaard, B. K. Humberset, K.M. Laundal, H. U. Frey, J. B. Sigwarth, A.Aasnes, J. Weygand. Substorm auroral asymmetries in the conjugate hemispheres during onset and expansion phase. AGU, San Francisco, USA, December, 2009.

  • 184. K. M. Laundal and N. Østgaard Asymmetric aurora detected in the two hemispheres simultaneously AGU, San Francisco, USA, December, 2009.

  • 183. H.U. Frey, C. Chaston, S. Fu, G. Haerendel, L. Juusola, T. Karlsson, B. Lanchester, R. Nakamura, N. Østgaard, T. Sakanoi, E. Seran, D. Whiterand. Auroral Small-and Meso-Scale Structures, Origin and Function AGU, San Francisco, USA, December, 2009.

  • 182. M. Liemohn, P. Brandt, M. Denton, E Donovan, H Frey, M Lester, W. Liu, S Milan, N Østgaard, M Palmroth, V Uritsky, X Zhang. Go With the Flow: The Reductionist View of Geospace at the System Level. AGU, San Francisco, USA, December, 2009.

  • 181. N. Østgaard and K. M. Laundal Asymmetric aurora detected in the two hemispheres simultaneously IAGA meeting, Sopron, Hungary, August, 2009.

  • 180. K. M. Laundal and N. Østgaard Conjugate aurora observations of substorms IAGA meeting, Sopron, Hungary, August, 2009.

  • 179. N. Østgaard and K. M. Laundal Asymmetric aurora detected in the two hemispheres simultaneously Invited talk 14th EISCAT workshop, Tromsø, Norway, August, 2009.

  • 178. T. Neubert, V. Reglero, N. Østgaard, E. Blanc The ASIM Mission for Studies of Severe Thunderstorms, AGU Chapman Conference, The Pennsylvania State University, May, 2009.

  • 177. N. Østgaard, T. Gjesteland, P. H. Connell , and J. Stadsnes, Production altitude, initial distributions and time delays for TGFs when instrumental deadtime effects are treated properly. Invited talk at the AGU Chapman Conference, The Pennsylvania State University, May, 2009.

  • 176. T. Gjesteland , N. Østgaard, P. H. Connell , and J. Stadsnes, Analysis of BATSE TGFs taking instrumental limitations into account. AGU Chapman Conference, The Pennsylvania State University, May, 2009.

  • 175. N. Østgaard, T. Gjesteland , P. H. Connell, J. Stadsnes, Analysis of a subset of BATSE TGFs that do not suffer from instrumental limitations. EGU, Vienna, April, 2009.

  • 174. B. K. Humberset, N. Østgaard, K. M. Laundal, A case study of auroral conjugacy based on global imaging EGU, Vienna, April, 2009.

  • 173. K. M. Laundal and N. Østgaard, IMF Bx Effects on Interhemispheric Polar Cap Asymmetries Inferred From Conjugate Auroral Imaging EGU, Vienna, April, 2009.

  • 172. K. M. Laundal and N. Østgaard, IPY-ICESTAR Arctic Frontiers, Tromsø, January, 2009.

  • 171. N. Østgaard, Y. Skogseide, K. Ullaland, J. Stadsnes, G. Mæhlum, C. B. Jørgensen, I. Kuvvetli, A. Solberg, K. Njøten. An X- and gamma-ray detector for observing terrestrial gamma flashes from the International Space Station. Invited talk at CMOS Emerging Technolgies Workshop, Banff, Canada, February, 2009

    2008

  • 170. K. Snekvik, N. Østgaard , S. Håland, R. Nakamura. Field aligned currents detected during fats flows in the magnetotail. AGU, San Francisco, USA, December, 2008.

  • 169. M. Daae, N. Østgaard , W. S. Lewis. Undulations on the Equatorial Edge of the Auroral Oval. AGU, San Francisco, USA, December, 2008.

  • 168. K. M. Laundal, N. Østgaard Auroral asymmetries in the conjugate hemispheres during strong IMF Bx. AGU, San Francisco, USA, December, 2008.

  • 167. N. Østgaard, T. Gjesteland , P. H. Connell, J. Stadsnes Analysis of a subset of BATSE TGFs that do not suffer from instrumental limitations. AGU, San Francisco, USA, December, 2008.

  • 166. K. Olafsson and N. Østgaard. The Space Science Suitcase Instruments for Exploring Space Weather From the Classroom., AGU, San Francisco, USA, December, 2008.

  • 165. K. M. Laundal and N. Østgaard, Conjugate imaging of substorms Invited talk Transatlantic Science Week 2008, Ottawa, Canada, 2008.

  • 164. N. Østgaard and K. M. Laundal. Conjugate imaging of substorms, Invited talk at the 3. International Symposium of KuaFu at Kunming, Yunnan, China, 15-19 September, 2008.

  • 163. C. Budtz-Jørgensen, I Kuvvetli, Y. Skogseide, K. Ullaland, N. Østgaard. Characterization of CZT Detectors for the ASIM Mission, Talk at the IEEE conference in Dresden, October 25, 2008.

  • 162. S. Mikkelsen D. Meier, G. Mæhlum, B. Sundal, J. Talebi, A. Helland, N. Østgaard, Y. Skogseide, K. Ullaland. Low-Power and Low-Noise MultiChannel ASIC for X-ray and Gamma-Ray Spectrosopy, AMISCA, Cascais, Portugal, August 2008.

  • 161. K. M. Laundal and N. Østgaard. Conjugate observations of substorm onset and expansion in the two hemispheres, SCAR/IASC IPY, St. Petersburg, Russia, July, 2008.

  • 160. N. Østgaard, A. L. Borg, A. Åsnes, A. Pedersen, M. Øieroset, T. Phan, K. Snekvik and K. M. Laundal. Invited , What are the ionospheric signatures of magnetotail reconnection?, SCAR/IASC IPY, St. Petersburg, Russia, July, 2008.

  • 159. T. Gjesteland, N. Østgaard, P. H. Connell, J. Stadsnes Monte Carlo simulation of the temporal behavior of Terrestrial Gamma ray Flashes and analysis of the BATSE measurements. Workshop on Coupling of Thunderstorms and Lightning Discharges to Near-Erath Space, Corsica, France, June, 2008.

  • 158. N. Østgaard, T. Gjesteland, J. Stadsnes, P. H. Connell, B. Carlson The production altitude and time delays of the terrestrial gamma flashes - revisiting the BATSE spectra Workshop on Coupling of Thunderstorms and Lightning Discharges to Near-Erath Space, Corsica, France, June, 2008.

  • 157. N. Østgaard, K. M. Laundal. Invited , Auroral conjugacy studies AGU, Fort Lauderdale, Florida, May, 2008.

  • 156. K. Snekvik, R. Nakamura, S. Haaland and N. Østgaard A statistical study of the current sheet structure associated with fast flows in the magnetotail. EGU, Vienna, April 2008.

  • 155. T. Gjesteland, N. Østgaard, P. H. Connell, J. Stadsnes Monte Carlo simulation of the temporal behavior of Terrestrial Gamma ray Flashes EGU, Vienna, 2008.

  • 154. N. Østgaard, T. Gjesteland, J. Stadsnes, P. H. Connell, B. Carlson The production altitude and time delays of the terrestrial gamma flashes - revisiting the BATSE spectra EGU, Vienna, April 2008.

  • 153. M. Daae, N. Østgaard, B. Lewis Undulations on the equatorial edge of the auroral oval in the dusk sector EGU, Vienna, April 2008.

  • 152. T. Gjesteland, N. Østgaard, J. Stadsnes, P. H. Connell, B. Carlson The production altitude and time delays of the terrestrial gamma flashes - revisiting the BATSE spectra URSI, Colorado, january 2008.

    2007

  • 151. N. Østgaard, A. L. Borg, A. Åsnes, A. Pedersen, M. Øieroset, T. Phan and K. Snekvik. What are the ionospheric signatures of magnetotail reconnection? AGU fall meeting, San Francisco, USA, 2007.

  • 150. T. Gjesteland, N. Østgaard, P. H. Connell, J. Stadsnes Monte Carlo simulation of the temporal behavior of Terrestrial Gamma ray Flashes AGU fall meeting, San Francisco, USA, 2007.

  • 149. K. M. Laundal and N. Østgaard. Solar wind pressure as a cause for persistent proton precipitation AGU fall meeting, San Francisco, USA, 2007.

  • 148. A. Åsnes, M. G. G. T. Taylor, A. L. Borg, C. P. Escoubet, H. Laakso, A. Masson, N. Østgaard, P. Daly, A.N. Fazakerley, E. Lucek. Cluster observations of electron acceleration in near-Earth reconnection events. AGU fall meeting, San Francisco, USA, 2007.

  • 147. A. Orr, R. Nasca, M. Tacconi, S. De Mey, O. Hartnack, P. Davidsen, J.S. Pedersen, S.E. Jorgensen, O. Mikkelsen, K. Pedersen, O. Gloe-Jakobsen, P. L. Thomsen, J. Rodrigo, T. Neubert, N. Østgaard, V. Reglero, E. Blanc ESA's Atmosphere-Space Interactions Monitor (ASIM) for the ISS, the 3rd International Symposium on Physical Sciences in Space (ISPS 2007), October 2007, Nara, Japan.

  • 146. N. Østgaard . De mystiske tvillingene - Nordlys og Sørlys, Invited talk Forskningsadgene, Bergen, Sept 22, 2007.

  • 145. A. Helland, N. Østgaard, K. Ullaland, A. O. Solberg, K. Njøten, V. Reimundo. ASIM, 18th symposium on European Rocket and balloon programmes and related resarch, June 2007, Visby, Sweden.

  • 144. K. Olafsson , N. Østgaard, E. Tanskanen The Spce Suitcase - instruments for exploring the near-Earth space from the classroom IHY workshop, Torino, Italy, June, 2007.

  • 143. N. Østgaard . IPY-ICESTAR. Invited talk Norway-Japan Symposium on Polar, Space and Climate, May 29-30, Tokyo, Japan

  • 142) Anil Bhardwaj, Ronald F. Elsner, G. Randall Gladstone, Graziella Branduardi-Raymont, Konrad Dennerl, Carey M. Lisse, Thomas E. Cravens, J. Hunter Waite Jr., Nikolai Østgaard, Bradford J. Wargelin, Ina Robertson, Peter Beiersdorfer, Steven L. Snowden, Vasili Kharchenko. Solar System X-rays: Relationship with Solar X-rays and Solar Wind. Asia Oceania Geosciences Society, 4th Annual Assembly, Bangkok, July 30 - August 4, 2007.

  • 141. N. Østgaard, A. L. Borg, A. Åsnes, A. Pedersen, M. Øieroset and T. Phan. What are the ionospheric signatures of magnetotail reconnection? Invited. IUGG meeting, Perugia, July, 2007.

  • 140. J. Stadsnes, C. Sætre, N. Østgaard, C. A. Barth, S. M. Bailey, G. A. Germany, J. W. Gjerloev. Energetic Particles and Geomagnetic Storm Influence on Chemical and Dynamical Processes in the Polar Stratosphere and Mesosphere. Invited, IUGG meeting, Perugia, July, 2007.

  • 139. J. Stadsnes, C. Sætre, N. Østgaard, C. A. Barth, S. M. Bailey, G. A. Germany, J. W. Gjerloev. Energetic Particles and Geomagnetic Storm Influence on Chemical and Dynamical Processes in the Polar Stratosphere and Mesosphere. AGU, Mexico, May, 2007.

  • 138. T. Gjesteland , N. Østgaard and J. Stadsnes. Monte Carlo Simulation of Terrestrial Gamma ray Flashes production altitude. EGU meeting in Vienna, April 2007.

  • 137. K. Laundal and N. Østgaard Global observations of proton precipitation during the 21.-25. October 2001 geomegnetic storm. EGU meeting in Vienna, April 2007.

  • 136. J. R. Flatjord and N. Østgaard The characteristics of theta aurora and implications for its production mechanisms. EGU meeting in Vienna, April 2007.

  • 135. K. Snekvik , R. Nakamura, S. Haaland, N. Østgaard A statistical survey of the electric field Z(GSM) component in the plasma sheet based on Cluster data. EGU meeting in Vienna, April 2007.

  • 134. N. Østgaard Conjugate studies, Invited review talk at the IPY-ICESTAR kick-off meeting in Helsinki, Finland, February, 2007.

  • 133. N. Østgaard Conjugate studies, Invited talk at the 2. International Symposium of KuaFu at Hainan, China, 15-19 January, 2007.

    2006

  • 132. N. Østgaard, J. Stadsnes, T. Gjesteland, Paul H. Conell. TGF production altitude - revisiting the BATSE spectra in view of upcoming missions AGU fall meeting, San Francisco, December, 2006.

  • 131. N. Østgaard . Imaging the upper atmopshere from space. Invited talk at the Transatlantic Science Week 2006, 'Arctic Meltdown Global Effects', October 2-4, 2006, Carnegie Institution, Washington DC., USA.

  • 130. N. Østgaard and J. Stadsnes. X-ray spectra measured by MXGS can reveal the production altitude of TGFs. ASIM Science workshop, ESTEC, June, 2006.

  • 129. N. Østgaard, S. B. Mende, H. U. Frey, J. B. Sigwarth A. Aasnes, J. Weygand. ICESTAR: Auroral conjugacy studies. SCAR meeting, Hobart, Australia, July 2006.

  • 128. T. Neubert , N. Østgaard, Carl Budz-Jorgensen, Irfan Kuvvetli, Victor Reglero, Eric Donovan, Serge Soula, Elisabeth Blanc. The Atmosphere-Space Interactions Monitor (ASIM) for the International Space Station. 57th International Astronautical Congress, October 2006.

  • 127. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes, J. Weygand. Auroral conjugacy studies based on global imaging. Invited talk at the National Institute of Polar Reasearch, Tokyo, Japan,, August 2006.

  • 126. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes, J. Weygand. Hemispherical asymmetries derived from conjugate auroral imaging. Invited talk at the Western Pacific Geophysical Meeting, Beijing, China, July 2006.

  • 125. C. Sætre , J. Stadsnes, N. Østgaard, C. A. Barth, S. M. Bailey, G. A. Germany, D. N. Baker. Chemical effects of electron precipitation - Modelling thermospheric nitric oxide. COSPAR meeting, Beijing, July, 2006.

  • 124. J. Stadsnes , N. Østgaard,C. Sætre, A. Aasnes. Global observations of the dynamics of energetic electron precipitation during substorms. COSPAR meeting, Beijing, July, 2006.

  • 123. J. Stadsnes , A. Aksnes, C. Sætre, N. Østgaard, C.A. Barth, S.M. Bailey, G. Germany. Satellite remote mapping of the precipitation of energetic electrons and their effects on the Earth's upper atmosphere. AOGS 2006 meeting in Singapore 10-14 July, 2006.

  • 122. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes. Substorm onset asymmetries derived from conjugate auroral imaging EGU meeting, Vienna, Austria, April, 2006.

  • 121. N. Østgaard , K. Kauristie, A. Weatherwax, ICESTAR A connection between IHY and IPY. Invited talk at the EGU meeting, Vienna, Austria, April, 2006.

  • 120. C. Sætre , J. Stadsnes, N. Østgaard, C. A. Barth, S. M. Bailey, G. A. Germany, D. N. Baker. Electron precipitation - Energy deposition and chemical effects in the lower thermosphere. EGU meeting, Vienna, Austria, April, 2006.

  • 119. T. Neubert , N. Østgaard, Carl Budz-Jorgensen, Irfan Kuvvetli, Victor Reglero, Elisabeth Blanc. The Atmosphere-Space Interactions Monitor (ASIM) for the International Space Station. EGU meeting, Vienna, Austria, April, 2006.

  • 118. N. Østgaard Remote sensing of X rays to study characteristics of electron precipitation. Invited talk at 2nd International Workshop on Riometry, Banff, Canada, March 2006.

  • 117. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes. Conjugate imaging of substorms. Invited talk at the ICS-8, March, Calgary, 2006.

  • 116. N. Østgaard and T. Immel. Global imaging to predict space weather. Invited talk at the SCOSTEP, STP-11 in Rio de Janeiro, Brazil 6-10 March, 2006.

  • 115. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth. Auroral conjugacy studies, Invited talk at the Yosemite meeting, California, February, 2006.

  • 114. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth. Simulaneous imaging of the reconnection spot in the opposite hemispheres during northward IMF, Invited talk at the IHY European Assembly, January 2006 .

    2005

  • 113. N. Østgaard and J. Stadsnes. Production altitude effects on the X-ray spectrum from TGFs. AGU fall meeting in San Francisco, 2005.

  • 112. N. Østgaard , Conjugate auroral observations, Now and in the future. Invited talk at the Vegard symposium, Oslo, Norway, October 14, 2005.

  • 111. N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth. Global imaging of Auroral Phenomena in the Conjugate Hemispheres. Invited talk at the IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July, 2005.

  • 110. A. Aksnes, J. Stadsnes, N. Østgaard, G. A. Germany, R. R. Vondrak, K. Oksavik, A. Brekke, U. P Lovhaug. Ionospheric global conductance maps from remote sensing of UV and X-ray emissions. Invited talk at the IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July, 2005.

  • 109. N. Østgaard and J. Stadsnes. Production altitude effects on the X-ray spectrum from TGFs. Invited talk at the midterm review and science meeting of the European Union Research Training Network, Coupling of Atmopsheric Layers, Crete, Greece, June, 2005.

  • 108. Anil Bhardwaj , Ron Elsner, Randy Gladstone, Tom Cravens, Hunter Waite, Graziella Branduardi-Raymont, Nikolai Ostgaard, Konrad Dennerl, Casey Lisse, Vasili Kharchenko, Ronnie Hoekstra, Peter Beiersdorfer. A Comparative View of X-rays from the Solar System. AGU spring meeting, New Orleans, May, 2005.

  • 107. Nesse H. Stadsnes J., Paxton L., Saetre C., Aksnes A. , Åsnes A., Ostgaard N. Effects on the O/N2-ratio caused by ionospheric heating during geomagnetic storms. EGU meeting, Vienna, Austria, April, 2005.

  • 106. C. Sætre , C. A. Barth, J. Stadsnes, N. Østgaard, D. N. Baker, A. Aksnes, H. Nesse, S. M. Petrinec, S. M. Bailey. Comparisons of electron energy flux derived from X-ray bremsstrahlung measurements and from a photochemical model for nitric oxide. EGU meeting, Vienna, Austria, April, 2005.

  • 105. A. L. Borg, N. Østgaard, A. Pedersen. Studies of an X-line passage 2 October 2002 using multipoint Cluster and Polar imaging data, EGU meeting, Vienna, Austria, April, 2005.

  • 104. A. Aksnes, J. Stadsnes, A. Brekke, N. Østgaard, G. A. Germany, R. R. Vondrak, K. Oksavik, U. P Lovhaug. Height profiles of the ionospheric electron density derived from remote sensing of UV- and X-ray emissions and measured by EISCAT radar, EGU meeting, Vienna, Austria, April, 2005.

  • 103. N. Østgaard, J. Stadsnes, J. Moen, J. C. Gerard. A double spacecraft imaging mission to study reconnection and ion outflow EGU meeting, Vienna, Austria, April, 2005.

  • 102. N. Østgaard, S. B. Mende, H. Frey, J. B. Sigwarth. Auroral signatures of lobe reconnection observed simultaneously in the conjugate hemispheres. EGU meeting, Vienna, Austria, April, 2005.

    2004

  • 101. A. Åsnes, Reiner Friedel, Michelle Thomsen, Tom Cayton, Nikolai Ostgaard, Johan Stadsnes. Statistical pitch angle properties of substorm injected electron clouds and their relation to dawnside energetic electron precipitation. AGU meeting, San Francisco, USA, Dec, 2004.

  • 100. R. Gladstone, R. Elsner , A. Bhardwaj, N. Østgaard, H. Waite, Jr., T. Majeed, S. W. Chang, T. E. Cravens, A. E. Metzger. Chandra observations of soft X-ray emissions from Earth and Jupiter. AGU meeting, San Francisco, USA, Dec, 2004.

  • 99. N. Østgaard, S. B. Mende, H. Frey, T. J. Immel, J. B. Sigwarth, L. A. Frank. The Cusp Aurora in the Conjugate Hemispheres of the Earth. AGU meeting, San Francisco, USA, Dec, 2004.

  • 98. C. Sætre , J. Stadsnes, H. Nesse, A. Aksnes, S. M. Petrinec, C. A. Barth, D. N. Baker, R. R. Vondrak and N. Østgaard, Direct comparisons of energetic electron precipitation and nitric oxide in the upper atmosphere during geomagnetic storms. AGU meeting, San Francisco, USA, Dec, 2004.

  • 97. A. Bhardwaj, R. F. Elsner , G. R. Gladstone, J. H. Waite, Jr., T. E. Cravens, N. Østgaard, S. W. Chang, A. E. Metzger, T. Majeed. First terrestrial soft X-ray aurora observations by Chandra. Hunstville workshop, Alabama, USA, Nov. 2004.

  • 96. Pedersen, A.; Balogh, A.; Borg, A.L.; Holtet, J.; Lybekk, B.; Moen, J.; Oksavik, K.; Østgaard, N.; Svenes, K.; Soeraas, F. Electric and magnetic field and particle observations on Cluster combined with ground-based observations during substorms, ICS7-A-00083, ICs-7, March 21-27, 2004 Levi, Lapland, Finland

  • 95. Alexander Kozlovsky, Alexander Koustov, Vladimir Safargaleev, N. Østgaard. Response of magnetospheric electric fields and dayside auroras to a solar wind pressure pulse. SuperDARN-2004 workshop.

  • 94. T. J. Stubbs, Richard R. Vondrak, N. Østgaard, John B. Sigwarth and Louis Frank. Simultaneous observations of the auroral oval in both hemispheres under various conditions AGU meeting, Montreal, Canada, May, 2004.

  • 93. H.U. Frey , N. Østgaard, T.J. Immel, H. Korth, S.B. Mende, Seasonal dependence of localized, High Latitude Dayside Aurora (HiLDA), AGU meeting, Montreal, Canada, May, 2004.

  • 92. Immel, T. J., N. Ostgaard, D. J. Strickland, H. U. Frey, S. B. Mende, G. Lu IMAGE-FUV observations of the October-November 2003 flare and magnetic storm effects on Earth, AGU meeting, Montreal, Canada, May, 2004.

  • 91. H.U. Frey, G. Haerendel, S.B. Mende, T. Forrester, M. Thomsen, T.J. Immel, N. Ostgaard Sub-Auroral Morning Proton Spots (SAMPS) as a result of plasmapause-ring-current interaction, AGU meeting, Montreal, Canada, May, 2004.

  • 90. H.U. Frey, S.B. Mende, T.J. Immel, N. Ostgaard, T.D. Phan The combination of auroral imaging and spacecraft in-situ measurements for M-I coupling research, COSPAR, Paris, July, 2004.

  • 89. A. Kozlovsky,A. Koustov, V. Safargaleev, N. Østgaard,Response of dayside auroras and ionospheric plasma flows to a solar wind pressure pulse, AGU meeting, Montreal, Canada, May, 2004.

  • 88. N. Østgaard, S. B. Mende, H. Frey, T. J. Immel, L. A. Frank, J. B. Sigwarth, M. O Fillingim. IMF control of auroral phenomena in the conjugate hemispheres, AGU meeting, Montreal, Canada, May, 2004.

  • 87. O. Amm, A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany, I. Sillanpää, Observations and analysis of ionospheric electrodynamics during a substorm recovery phase using the MIRACLE network, EGU meeting, Nice, France, April, 2004.

  • 86. A. Aksnes, J. Stadsnes, Asgeir Brekke, U. P Lovhaug, N. Østgaard, G. A. Germany, R. R. Vondrak. Comparing height profiles of the ionospheric electron density derived from remote sensing of UV- and X-ray emissions and from EISCAT radar data, EGU meeting, Nice, France, April, 2004.

  • 85. N. Østgaard, S. B. Mende, H. Frey, T. J. Immel, L. A. Frank, J. B. Sigwarth, M. O Fillingim. IMF control of the aurora in the conjugate hemispheres, EGU meeting, Nice, France, April, 2004.

  • 84. O. Amm , A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany, and I. Sillanpää Observations and analysis of ionospheric electrodynamics during a substorm recovery phase using the MIRACLE network, Invited talk at ICS-7, Finland, March, 2004.

    2003

  • 83. G. K. Parks , M. Fillingim, E. S Lee, M. Spesojevic, M. Wilber, F. Mozer, N., Østgaard, K. Liou, C. I. Meng, J. Scudder, B. Giles, T. Moore, J. Wygant, N. Fox, J. Sigwarth, J. Spann, B. Blake, P. Chi, C. Russell, M. Goldstein A. Fazakerley, I. Dandouras, C. Vallat, H. Reme, P. Escoubet, A. Balogh, Featuring Particles and Fields from the Super Storms during October 24 to 29, 2003., AGU fall meeting, San Francisco, 2003.

  • 82. H.U. Frey H.U Frey, S.B. Mende, T.J. Immel, N. Østgaard, Response of the dayside aurora to the October/November storms, AGU fall meeting, San Francisco, 2003.

  • 81. O Amm, A Aksnes, J Stadsnes, N Ostgaard, R R Vondrak, G A Germany, G Lu, A Pulkkinen, I Sillanpaa, Mesoscale and semiglobal scale view of the ionospheric electrodynamics of auroral torches, AGU fall meeting, San Francisco, 2003.

  • 80. K. S. Garcia, P. H. Reiff, S. Naehr, H. Frey, J. Sigwarth, N. Østgaard, S. Mende, L. Frank, T. Hill, F. Toffoletto. Comparison of Rice Field Model to Simultaneous Conjugate Auroral Images , AGU fall meeting, San Francisco, 2003.

  • 79. N. Østgaard, S. B. Mende, H. Frey, T. J. Immel, L. A. Frank, J. B. Sigwarth IMF control of the theta aurora and substorm onset location in the conjugate hemispheres, AGU fall meeting, San Francisco, 2003.

  • 78. H.U. Frey, S.A. Fuselier, S.B. Mende, T.D. Phan, T.J. Immel, N. Ostgaard Investigation of cusp dynamics with IMAGE-FUV, AGU fall meeting, San Francisco, 2003.

  • 77. A. Aksnes, J. Stadsnes, Asgeir Brekke, U. P Lovhaug, N. Østgaard, G. A. Germany, R. R. Vondrak. Comparing height profiles of the ionospheric electron density derived from remote sensing of UV- and X-ray emissions and from EISCAT radar data, AGU fall meeting, San Francisco, 2003.

  • 76. H. Nesse , J. Stadsnes , C. J. Mertens , C. Saetre , A. Aasnes, A. Aksnes, N. Østgaard. Upper Atmosphere Temperature Effects of Energetic Electron Precipitation During Substorms, AGU fall meeting, San Francisco, 2003.

  • 75. T. J. Stubbs, Richard R. Vondrak, Nikolai Ostgaard, John B. Sigwarth Conjugate auroral observations under various interplanetary conditions, AGU fall meeting, San Francisco, 2003.

  • 74. A. T. Weatherwax, L. J. Lanzerotti, T. J. Rosenberg, R. Clauer, S. B. Mende, U. S. Inan, M.J. Engebretson, J. LaBelle, M. Lessard, K. Lynch, C. Maclennan, A. Ridley, D. L. Detrick, N. Petit, H. U. Frey, N. Østgaard, R. W. Sterling, J. H. Doolittle, H. Fukunishi, Polar Experiment Network for Geospace Upper-atmosphere Investigations (PENGUIn): A Vision for Global Polar Studies and Education, AGU fall meeting, San Francisco, 2003.

  • 73. N. Østgaard, J. I. Moen, S. B. Mende, H. U. Frey, P. Gallop, K. Oksavik. Reconnection rate determined from EISCAT VHF radar measurements and IMAGE FUV imaging from space. EISCAT 2003 Workshop, Menlo Park, California, USA, August 25-29, 2003.

  • 72. N. Østgaard, S. B. Mende, H. Frey, L. A. Frank, J. B. Sigwarth. Global conjugate imaging of a substorm by Polar and IMAGE., EGS/AGU, EAE03-A-02406, April 2003, Nice, France.

  • 71. S. B. Mende, H. U. Frey, N. Østgaard, D. S. Evans. The expansion of substorm auroras in local time., EGS/AGU, EAE03-A-02974, April 2003, Nice, France.

  • 70. H. U. Frey, S. Fusilier, S. B. Mende, N. Østgaard. Proton aurora at the cusp footprint during southward IMF, EGS/AGU, EAE03-A-07221, April 2003, Nice, France.

  • 69. A. Aksnes, J. Stadsnes, G. Lu, N. Østgaard, R. R. Vondrak, D. L. Detrick, T. J. Rosenberg, G. A. Germany, M. Schulz, Effects of energetic electrons on the electrodynamics in the ionosphere. EGS/AGU, EAE03-A-02575, April 2003, Nice, France.

  • 68. A. Aksnes, O. Amm, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany, A. Pulkkinen, I. Sillanpaa. Comparison of two Different Techniques to Derive the Ionospheric Conductances., EGS/AGU, EAE03-A-02295, April 2003, Nice, France.

  • 67. O. Amm, A. Aksnes, J. Stadsnes, N. Ostgaard, R.R. Vondrak, G. A. Germany, G. Lu, A. Pulkkinen, I. Sillanpää, Mesoscale and semiglobal scale view of the ionospheric electrodynamics of auroral torches., EGS/AGU, EAE03-A-02625, April 2003, Nice, France.

  • 66. H. Nesse, J. Stadsnes, A. Aksnes, C. Sætre, A. Åsnes, P. C. Anderson, A. Christensen, L. Paxton, N. Østgaard. Atmospheric effects of energetic electron precipitation during substorms., EGS/AGU, EAE03-A-13231, April 2003, Nice, France.

    2002

  • 65. N. Østgaard, J. Moen, S. B. Mende, H. U. Frey, T. J. Immel, P. Gallop, K. Oksavik. Estimates of magnetotail reconnection rate based on IMAGE FUV and EISCAT measurements, AGU fall meeting, San Francisco, 2002 USA.

  • 64. B. Ursin, J. Stadsnes, M. Brittnacher, G.K. Parks, R. Friedel, N. Østgaard, The Global Development of Energetic Electron Precipitation During the Storm Sudden Commencement on September 24, 1998., AGU fall meeting, San Francisco, 2002 USA.

  • 63. O. Amm, A. Aksnes, J. Stadsnes, N. Østgaard, T. J. Rosenberg, D. L. Detrick, G. A. Germany, R. R. Vondrak, I. Sillanpää Comparison of two Different Techniques to Derive the Electric Current Density in the Ionosphere, AGU fall meeting, San Francisco, 2002 USA.

  • 62. A. Aksnes, J. Stadsnes, G. Lu, A. D. Richmond, N. Østgaard, T. J. Rosenberg, D. L. Detrick, G. A. Germany, R. R. Vondrak, M. Schulz, The electrodynamics in the ionosphere during substorms, AGU fall meeting, San Francisco, 2002 USA.

  • 61. H.U. Frey, S.B. Mende, T.J. Immel, G. Lu, N. Østgaard, Global cause of localized high latitude aurora, AGU fall meeting, San Francisco, 2002 USA.

  • 60. N. Østgaard, S. B. Mende, H. U. Frey, G. R. Gladstone, Neutral hydrogen density profiles derived from geocoronal imaging, poster at the COSPAR meeting, Houston, Texas, October 2002 USA.

  • 59. N. Østgaard, Hydrogen density profiles derived from geocoronal imaging. Seminar, University of California, Berkeley, USA, September 2002.

  • 58. N. Østgaard, Hydrogen density profiles derived from geocoronal imaging. Guest lecture, Lockheed Martin Advanced Technology Center, Palo Alto, September 2002.

  • 57. A. Bhardwaj, G. R. Gladstone, R. F. Elsner , J. H. Waite, Jr., D. Grodent, W. S. Lewis, F. J. Crary, M. C. Weisskopf, R. R. Howell, R. E. Johnson, P. G. Ford, A. E. Metzger, K. C. Hurley, E. D. Feigelson, G. P. Garmire, T. Majeed, J. T. Clarke, D. T. Young, M. K. Dougherty, S. A. Espinosa, T. E. Cravens, A. F. Tennant, J.-M. Jahn, N. Østgaard, Soft X-Ray Emissions from Planets and Moons, Conference: ESLAB 36: Earth-like Planets and Moons, Noordwijk, June 3-8, 2002.

  • 56. N. Østgaard, Hydrogen density profiles derived from geocoronal imaging. Guest lecture, University of Bergen, Norway, May 2002.

  • 55. N. Østgaard, Hydrogen density profiles derived from geocoronal imaging. Guest lecture, University of Oslo, Norway, May 2002.

  • 54. N. Østgaard, S. B. Mende, H. U. Frey, G. R. Gladstone, Neutral hydrogen density profiles derived from geocoronal imaging, poster at AGU spring meeting, Washington DC, May 2002.

  • 53. A. Aksnes, J. Stadsnes, M. Lester, N. Østgaard, T. J. Rosenberg,, G. Germany , Ionospheric electric fields, conductances and currents during geomagnetic substorms, ICS-6, April 2002, Seattle, USA .

  • 52.T. Christensen, N. Østgaard, T. J. Rosenberg, D. Detrick, G. A. Germany and P. Stauning, Conjugate high-intensity energetic electron precipitation at high latitude, EGS, April 2002, Nice, France.

  • 51. A. Aksnes, J. Stadsnes, M. Lester, S. Milan, N. Østgaard, T. J. Rosenberg, D. L. Detrick, G. A. Germany, R. R. Vondrak, , M. Schulz, Electrodynamical parameters during a geomagnetic substorm, EGS, April 2002, Nice, France .

  • 50. A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, D. Detrick, T. J. Rosenberg, G. Germany, M. Schulz, Instantaneous ionospheric global conductance maps during substorms, EGS, April 2002, Nice, France.

  • 49. N. Østgaard, S. B. Mende, H. U. Frey, G. R. Gladstone, Neutral hydrogen density profiles derived from geocoronal imaging, poster at the Yosemite 2002, Magnetospehric Imaging Workshop, February 2002, California, USA.

    2001

  • 48. T. Christensen, N. Østgaard, T. J. Rosenberg, P. Stauning, G. A. Germany, J. Watermann, A conjugate study of localized high-energy precipitation event in the evening sector, poster at the AGU fall meeting, Dec 2001, San Francisco, USA.

  • 47. J. W. Gjerloev, R. A. Hoffman, N. Østgaard, L. A. Frank and J. B. Sigwarth, The non-expansive auroral disturbance events. poster at the AGU fall meeting, Dec 2001, San Francisco, USA.

  • 46. A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, D. Detrick, T. J. Rosenberg, G. Germany, D. Chenette and D. Weimer, Global maps of electromagnetical parameters during substorms, talk at the AGU fall meeting, Dec 2001, San Francisco, USA.

  • 45. N. Østgaard, S. Mende, H. Frey, T. Immel, G. Germany, J. Stadsnes and R. R. Vondrak, The energy transport during substorms based on remote sensing techniques, solar wind measurements, and magnetic indices, talk at the AGU fall meeting, Dec 2001, San Francisco, USA.

  • 44. N. Østgaard, Recent results from PIXIE. Guest lecture, University of Bergen, Norway, Nov 2001.

  • 43. N. Østgaard, G. Germany, J. Stadsnes and R. R. Vondrak, Energy analysis of substorms based on solar wind measurements, derived auroral electron distribution and magnetic indices, poster at the IAGA meeting August 2001 in Hanoi, Vietnam.

  • 42. N. Østgaard, T. J. Rosenberg, D. Detrick, J. Stadsnes and R. R. Vondrak, High-latitude dayside X-ray emissions observed in the southern auroral region, talk at the IAGA meeting August 2001 in Hanoi, Vietnam.

  • 41. P. C. Anderson, N. Østgaard, J. Sigwarth, S. Cummer, Multispectral imaging results from the Polar spacecraft, invited talk at the AGU spring meeting, May-June 2001,Boston USA.

  • 40. A. Aasnes, J. Stadsnes, J. Bjordal, N. Østgaard, S. Håland, T. J. Rosenberg and D. Detrick, A detailed study of the energetic electron precipitation at substorm onset and expansion, poster at the AGU spring meeting, May-June 2001,Boston USA.

  • 39. A. Aksnes, J. Stadsnes, N. Østgaard, J. Bjordal, T. J. Rosenberg, D. Detrick, G. Germany and R. R. Vondrak, Global maps of Pedersen and Hall conductivities through a substorm, talk at the AGU spring meeting, May-June 2001,Boston USA.

  • 38. N. Østgaard, G. Germany, J. Stadsnes and R. R. Vondrak, Energy analysis of substorms based on remote sensing techniques, solar wind measurements, and magnetic indices, talk at the AGU spring meeting, May-June 2001,Boston USA.

  • 37. N. Østgaard, Recent results from PIXIE. Seminar, University of California, Berkeley ,USA, May 2001.

  • 36. S. Håland, N. Østgaard, D. Vassiliadis and J. Stadsnes, Principal Component Analysis of X-ray Images, talk at the EGS meeting April 2001, Nice, France.

  • 35. J. Moen, J. A. Holtet, A. Pedersen, B. Lybekk, P. E. Sandholt, K. Oksavik, N Østgaard and G. Gustafsson, CLUSTER observations related to postnoon auroral arcs, talk at the EGS meeting April 2001, Nice, France.

  • 34. J. Stadsnes, J. Bjordal, N. Østgaard, A. Aksnes, R. R. Vondrak, T. J. Rosenberg and D. L. Chenette, Space based imaging of auroral X-rays, talk at the EGS meeting April 2001, Nice, France.

  • 33. N. Østgaard, J. Stadsnes, R. R. Vondrak, and G. Germany, Energy analysis of substorms based on remote sensing techniques, talk at the EGS meeting April 2001, Nice, France.

  • 32. N. Østgaard, G. Germany, J. Stadsnes and R. R. Vondrak, Energy analysis of substorms based on remote sensing techniques and solar wind measurements, poster at the Chapman Conference on Storm-Substorm Relationship, 13-16 March, 2001, Mumbai, India.

    2000

  • 31. A. Aksnes, J. Stadsnes, J. Bjordal, N. Østgaard, D. Detrick, T. J. Rosenberg, R. R. Vondrak and D. Chenette, Global Conductivity Maps Derived From Polar PIXIE Observations, poster at the AGU fall meeting Dec. 2000, San Francisco, USA, EOS Vol. 81, No 48, SM22A-03

  • 30. B. El Marji, B. L. Giles, M. Fok, T. E. Moore, N. Østgaard and M. O. Chandler, Cusp Area, Solar Wind Pressure and Ionospheric Outflow, poster at the AGU fall meeting Dec. 2000, San Francisco, USA, EOS Vol. 81, No 48, SM52A-19

  • 29. S. Håland, N. Østgaard, J. Stadsnes, F. Søraas, G. Germany, R.R. Vondrak, B. Wilken, T. Doke, G. D. Reeves, V. Lutsenko and J. -A Sauvaud, Comparison of Energy Spectra in the Ionosphere and in the Central Plasma Sheet During a Magnetospheric Substorm, talk at the AGU fall meeting Dec. 2000, San Francisco, USA, EOS Vol. 81, No 48, SM21A-10

  • 28. N. Østgaard, J. Stadsnes, R. R. Vondrak, and G. Germany, Energy Analysis of an Isolated Substorm Based on Remote Sensing Techniques, poster at the AGU fall meeting Dec. 2000, San Francisco, USA, EOS Vol. 81, No 48, SM71A-20

  • 27. S. Håland, N. Østgaard, J. Bjordal, J. Stadsnes, S. Ullaland, B. Wilken, T. Yamamoto, T. Doke, D. L. Chenette, G.K. Parks, M. Brittnacher and G. D. Reeves, Energetic Particle Signatures of Reconnection and Plasmoid Formation in the Magnetotail, First S-RAMP Conference, Sapporo, Japan, 2-6 October, 2000.

  • 26. J. Stadsnes, J. Bjordal, N. Østgaard, E. Thorsen, D. L. Chenette, G.K. Parks and M. Brittnacher, Temporal and Spatial Features of the Energetic Electron Precipitation During Substorms, talk at the AGU spring meeting May-June 2000, Washington DC, USA, EOS SM32B-03.

  • 25.N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, D. L. Chenette, J. G. Pronko, G. Germany and S. A. Cummer, Global energy input derived from UVI and PIXIE, talk at the AGU spring meeting May-June 2000, Washington DC, USA, EOS SM32B-05.

  • 24. J. Stadsnes, J. Bjordal, N. Østgaard, E. Thorsen, D. L. Chenette, G.K. Parks and M. Brittnacher, Temporal and Spatial Features of the Energetic Electron Precipitation During Substorms, talk at the EGS meeting April 2000, Nice, France.

  • 23. N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, D. L. Chenette, J. G. Pronko, G. Germany and S. A. Cummer, Global energy input derived from UV and X rays, talk at the EGS meeting April 2000, Nice, France.

    1999

  • 22. J. Stadsnes, J. Bjordal, N. Østgaard, E. Thorsen and D. L. Chenette, Energetic Electron Precipitation Patterns During Substorm Onset and Expansion, talk at the AGU fall meeting Dec. 1999. Abstract in EOS, Suppl. of Vol. 80, 46, SM52A-10, 1999.

  • 21. S. A. Cummer, R. R. Vondrak, R. Pfaff, N. Østgaard, J. Bjordal, J. Stadsnes, D. L. Chenette, G. K. Parks, M. J. Brittnacher, L. Frank, J. Sigwarth and C. W. Carlson.Global Multispectral Imaging of an Isolated Substorm, talk at the IUGG, Birmingham, July 1999.

  • 20. L.Lazutin, I. Kornilova, G. Starkov, T. Kornilova, L. Borovkov, S. Chernouss, J. Stadsnes, J. Bjordal, N. Østgaard, E. Thorsen, C. Meng, D. G. Sibeck and K. Liou. Comparison of Auroral Dynamics Over Kola Peninsula With the Global Auroral UV and X-ray Oval Measured by Polar/PIXIE, on February 9, 1997. talk at the AGU spring meeting May 1999. Abstract in EOS, Suppl. of Vol. 80, 17, SM31C-10, 1999.

  • 19. S. A. Cummer, R. R. Vondrak, R. Pfaff, N. Østgaard, J. Bjordal, J. Stadsnes, D. L. Chenette, G. K. Parks, M. J. Brittnacher, L. Frank, J. Sigwarth and C. W. Carlson. Global Multispectral Imaging of an Isolated Substorm, talk at the AGU spring meeting May 1999. Abstract in EOS, Suppl. of Vol. 80, 17, SM31C-11, 1999.

  • 18. N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A. Cummer, D. L. Chenette, M. Schulz and J. G. Pronko Localized Maximum of X-ray emission in the Morning Sector Caused by Drifting Electrons. Talk at the AGU spring meeting, Boston, May 1999, Abstract in EOS, Suppl. of Vol. 80, 17, SM32D-02, 1999

  • 17.N. Østgaard, "Nordlys - en effekt av stormer og eksplosjoner på solen (The aurora - an effect of solar storms and eruption)", Invited public talk at Bergen Realistforening, 12 Mars, 1999

  • 16. N. Østgaard, "Nordlys - en effekt av stormer og eksplosjoner på solen (The aurora - an effect of solar storms and eruption)", Invited public talk at Norges Fysikkstudenters Konferanse i Bergen, 28 February, 1999

  • 15.N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. Cummer, D. L. Chenette, M. Schulz, J. G. Pronko, G. K. Parks; M. J. Brittnacher and D. L. McKenzie. Intensified Energetic Electron Precipitation in the Morning Sector Caused by Drifting Electrons. Talk at the 34th Nordic Plasma and Gas Discharge Symposium, Geilo, Norway, 24- 27 January, 1999

    1998

  • 14. J Stadsnes, J Bjordal, E Thorsen, N Østgaard, D L Chenette, G K Parks and M Brittnacher. Temporal Characteristics of Energetic Electron Precipitation during Substorm Onset and Expansion Phase.AGU fall meeting 1998, Abstract in EOS, Suppl. of Vol. 79, 45, SM41B-05, 1998.

  • 13. N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. Cummer, D. L. Chenette, M. Schulz, J. G. Pronko, G. K. Parks; M. J. Brittnacher and D. L. McKenzie. Intensified Energetic Electron Precipitation in the Morning Sector Caused by Drifting Electrons. Invited talk at the Sixth Huntsville Modelling Workshop at Guntersville, Alabama, 26-30 October 1998

  • 12. N. Østgaard, S. Håland, J. Bjordal, J.Stadsnes, S. Ullaland, G. D. Reeves, D. L. Chenette, B. Wilken, T. Yamamoto, T. Doke, G. K. Parks and M. J. Brittnacher. Magnetospheric and Ionospheric Response to a Substorm: GEOTAIL HEP-LD and POLAR PIXIE Observations, Poster at the AGU spring meeting, Boston, May 1998. Abstract in EOS, Suppl. of Vol. 79, 17, SM41A-08, 1998.

  • 11.S. A. Cummer, R. R. Vondrak, R. Pfaff, N. Østgaard, J. Bjordal, J. Stadsnes, D. L. Chenette, G. K. Parks and M. J. Brittnacher, L. Frank and J. Sigwarth and C.Carlson. Multi-spectral Auroral Imaging on 23 November 1997, talk at the AGU spring meeting May 1998. Abstract in EOS, Suppl. of Vol. 79, 17, SM31B-05, 1998.

  • 10. N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, D. L. Chenette, G. K. Parks, M. J. Brittnacher and D. L.McKenzie. Global Scale Electron Precipitation During Substorms, Poster. Abstracts from 32nd Scientific Assembly of COSPAR, Nagoya, Japan 1998.

  • 9. N. Østgaard, Ionospheric Response to Magnetospheric Processes seen in X-ray and UV-images, Talk at the 33th Nordic Plasma and Gas Discharge Symposium, Geilo, Norway, 25- 28 January, 1998.

    1997

  • 8. N. Østgaard, J. Stadsnes, J. Bjordal, E. Thorsen, R. R. Vondrak, D. L. Chenette, G. K. Parks; M. J. Brittnacher and D. L. McKenzie. Global Scale Electron Precipitation Features During Substorms, Poster at the AGU fall meeting Dec. 1997. Abstract in EOS, 78, 46, F601, 1997 - awarded as an Outstanding Student Paper.

  • 7. J. Bjordal, J. Stadsnes, N. Østgaard, E. Thorsen, R. R. Vondrak, D. L. Chenette, J. Mobilia and S. Petrinec, Distribution of High Energy Electron Precipitation During the MSX/FAST Conjuction of 9 February 1997. poster at the AGU fall meeting Dec. 1997. Abstract in EOS, 78, 46, F503, 1997

  • 6. J. Stadsnes, N. Østgaard, F. Søraas, K. Aarsnes, J. Bjordal, K. Måseide, M. Smith and J. Sharber, Coordinated Studies of Auroral X-rays, Optical Emissions and Precipitating Electrons By Rockets. The 24th Annual European Meeting on Atmospheric Studies by Optical Methods, Andenes, Norway, 18-22 August 1997.

  • 5. J. Bjordal, M. Brittnacher, D. L. Chenette, D. L. McKenzie, G. K. Parks, J. Stadsnes, E. Thorsen, and N. Østgaard, X-ray and optical auroral imaging from the Polar satellite. The 24th Annual European Meeting on Atmospheric Studies by Optical Methods, Andenes, Norway, 18-22 August 1997.

  • 4. J. Bjordal, J. Stadsnes, N. Østgaard, D. L. Chenette, W. L. Imhof, G. K. Parks, M. Brittnacher, D. L. McKenzie, T. J.Rosenberg, J. G. Luhmann and R.R.Vondrak, Global Scale Auroral Electron Precipitation Features during Substorms. 8th Scientific Assembly of IAGA with ICMA and STP Symposia, Uppsala, Sweden, 4-15 August 1997.

  • 3. J. Stadsnes, J. Bjordal, E. Thorsen, N. Østgaard, D.L.Chenette, D. L. McKenzie, G. K. Parks and M. Brittnacher, Boundaries and dynamics of the energetic electron precipitation as seen from POLAR images. Invited paper, NATO Advanced Study Institute on Polar Cap Boundary Phenomena, Longyearbyen, Svalbard, 4-13 June 1997.

    1996

  • 2. J. Stadsnes, N. Østgaard, F. Søraas, K.Aarsnes and M. Smith, Electron flux modulations during pulsating aurora, poster at the AGU spring meeting May 1996. Abstract in EOS, 77, S238, 1996.

  • 1. N. Østgaard, J. Stadsnes, K. Aarsnes, F. Søraas and M. Smith. PULSAUR II Launched 01.23 MLT 9.2.1994: X-ray Measurements During a Pulsating Aurora, Talk at the EGS meeting in The Hague, May 1996, Abstract in Annales Geophysicae, Suppl. of Vol. 14, 730, 1996
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