168) A. Mezentsev, N. Østgaard, M. Marisaldi, D. Sarria, N. Lehtinen, T. Neubert, O. Chanrion, F. Gordillo-Vazquez. Discerning TGF and leader current pulse in ASIM observation.
Geophys: Res. Lett., doi: 10.1029/2024GL110554, Nov 2024.
[pdf]
167) M. Marisaldi , N. Østgaard, A. Mezentsev, T. Lang, J. E. Grove, D. Shy, G. M. Heymsfield, P. Krehbiel, R. J. Thomas, M. Stanley, D. Sarria, C. Schultz, R. Blakeslee, M. G. Quick, H. Christian, I. Adams, R. Kroodsma, N. Lehtinen, K. Ullaland, S. Yang, B. Hasan Qureshi, J. Søndergaard, B. Husa, D. Walker, M. Bateman, D. Mach, S. Cummer, M. Pazos, Y. Pu, P. Bitzer, M. Fullekrug, M. Cohen, J. Montanya, C. Younes, O. van der Velde, J. A. Roncancio, J. A. Lopez, M. Urbani & A. Santos.ss
Highly dynamic gamma-ray emissions are common in tropical thunderclouds
Nature Letter, doi: 10.1038/s41586-024-07936-6, October 2024.
[Springer Nature]
166) N. Østgaard, A. Mezentsev, M. Marisaldi, J. E. Grove, M. Quick, H. Christian, S. Cummer, M. Pazos, Y. Pu, M. Stanley, D. Sarria, T. Lang, C. Schultz, R. Blakeslee, I. Adams, R. Kroodsma, G. Heymsfield, N. Lehtinen, K. Ullaland, S. Yang, B. Hasan Qureshi, J. Søndergaard, B. Husa, D. Walker, D. Shy, M. Bateman, P. Bitzer, M. Fullekrug, M. Cohen, J. Montanya, C. Younes, O. van der Velde, P. Krehbiel, J. A. Roncancio, J. A. Lopez, M. Urbani, A. Santos & D. Mach.
Flickering Gamma-Ray Flashes, the Missing Link between Gamma Glows and TGFs.
Nature Letter, doi: 10.1038/s41586-024-07893-0, October 2024.
[Springer Nature]
165) I. Bjørge-Engeland, N. Østgaard, D. Sarria, M. Marisaldi, A. Mezentsev , A. Fuglestad, N. Lehtinen, J. E. Grove, D. Shy, T. Lang, M. Quick, H. Christian, C. Schultz, R. Blakeslee, I. Adams, R. Kroodsma, G. Heymsfield, K. Ullaland, S. Yang, B. Hasan Qureshi, J. Søndergaard, B. Husa, D. Walker, M. Bateman, D. Mach, P. Bitzer, M. Fullekrug, M. Cohen, M. Stanley, S. Cummer, J. Montanya, M. Pazos, C. Velosa, O. van der Velde, Y. Pu, P. Krehbiel, J. A. Roncancio, J. A. Lopez, M. Urbani, A. Santos, T. Neubert, F. Gordillo-Vazquez.
Evidence of a new population of weak Terrestrial Gamma-ray Flashes observed from aircraft altitude.
Geophys. Res. Lett., doi: 10.1029/2024GL110395, September 2024.
[pdf]
164) S. Soler, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, P. Jockel, T. Neubert, V. Riglero, N. Østgaard.
Parameterizations for global thundercloud corona discharge distributions
Atmospheric Chemistry and Physics, doi: 10.5194/acp-24-10225-2024, September 2024.
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163. C. Kohn, M. Heumesser, O. Chanrion, V. Reglero, N. Østgaard, H. J. Christian, T. J. Lang, R. J. Blakeslee, T. Neubert.
Employing Optical Lightning Data to identify lightning flashes associated to Terrestrial Gamma-ray Flashes
Bulletin of Atmospheric Science and Technology, March 2024.
[pdf]
162. O. A. van der Velde, J. Navarro, F. Fabro, V. Reglero, P. Connell, O. Chanrion, J. A. Lopez, J. Montanya,
T. Neubert, N. Østgaard.
TGF imaging by the Atmosphere-Space Interactions Monitor: Analysis of 3 bright TGFs and their parent thunderstorms
Scientific Reports, March 2024.
[pdf]
161) I. Bjørge-Engeland, N. Østgaard, M. Marisaldi, A. Luque, A. Mezentsev, N. Lehtinen, O.
Chanrion, A. Fuglestad,s T. Neubert, V. Reglero.
High peak current lightning and the production of Elves
J. Geophys. Res., doi: 10.1029/2023JD039849, Jan 2024.
[pdf]
160) D. Li, T. Neubert, L. Skanning Husbjerg, Y. Zhu, O. Chanrion, J. Lapierre, A. Luque, K. Cohn, M. Heumesser, K. Dimitrriadou, M.
Stendel, E. Kaas, E. P. P. Wiinberg Olesen, F. Liu, N. Østgaard, V. Reglero.
Observation of blue corona discharges and cloud microphysics in the top of thunderstorm cells in cyclone Fani.
J. Geophys. Res..,doi:10.1029/2022JD038328, Oct 2023.
[pdf]
159) 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
J. Geophys. Res., doi: 10.1029/2023JD038893, Aug 2023.
[pdf]
158) D. Sarria, N. Østgaard, M. Marisaldi, N. G. Lehtinen, A Mezentsev.
Library of simulated gamma-ray glows and application to previous airborne observations
J. Geophys. Res., doi: 10.1029/2022JD037956, April 2023.
[pdf]
157) 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.
J. Geophys. Res., doi: 10.1029/2022JD037460, March 2023.
[pdf]
156) D. Li, A. Luque, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, L. Skanning Husbjerg, T. Neubert, O. Chanrion, G. Lu, H. Zhang, J. Han, N. G. Lehtinen, N. Østgaard, V. Reglero.
Different types of corona discharges associated with high-altitude positive Narrow Bipolar Events nearby cloud top
J. Geophys. Res., doi: 10.1029/2022JD037883, Jan 2023.
[pdf]
155) S. Soler, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, A. Luque, D. Li, T. Neubert, O. Chanrion, V. Riglero,
J. Navarro-Gonzalea, N. Østgaard.
Global distribution of key features of streamer corona discharges in thunderclouds
J. Geophys. Res., doi: 10.1029/2022JD036989, Dec 2022.
[pdf]
154) M. D. Caballero-Garcia, R. Gupta, S. B. Pandey, S. R. Oates, M. Marisaldi, Y.-D. Hu,
A. J. Castro-Tirado, R. Sanchez-Ramirez, P. H. Connell, F. Christiansen, A. Kumar Ror, A. Aryan, J.-M. Bai,
M. A. Castro-Tirado, Y.-F. Fan, E. Fernandez-Garcia, A. Kumar, A. Lindanger, A. Mezentsev, J. Navarro-Gonzalez, T. Neubert, N. Østgaard,
I. Perez-Garcia, V. Reglero, D. Sarria, T. R. Sun, D.-R. Xiong, J. Yang, Y.-H. Yang, and B.-B. Zhang
Multiwavelength study of the luminous GRB 210619B observed with Fermi and ASIM.
MNRAS, Dec 2022.
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153) A. Huang, S. Cummer, Y. Pu, O. Chanrion,T. Neubert, V. Reglero N. Østgaard.
Transition in Optical and Radio Features during the Early Development of Negative Intracloud Leader
Geophys. Res. Lett.,doi:10.1029/2022GL100594, Nov 2022.
[pdf]
152) A. Ohma, K. M. Laundal, J. P. Reistad, N. Østgaard.
Evolution of IMF By induced asymmetries during substorms: Superposed epoch analysis at geosynchronous orbit
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[pdf]
151) C. A. Skeie, N. Østgaard, A. Mezentsev, I. Bj ørge-Engeland ,M. Marisaldi, N. Lehtinen, V. Reglero, T. Neubert
The temporal relationship between Terrestrial Gamma-ray flashes and associated optical pulses from lightning
J. Geophys. Res., doi: 10.1029/2022JD037128, Aug 2022.
[pdf]
150) D. Li, A. Luque, N. G. Lehtinen, F.J. Gordillo-Vazquez, T. Neubert, G. Lu, O. Chanrion, H. Zhang,
N. Østgaard, V. Reglero.
Multi-pulse corona discharges in thunderclouds observed in optical and radio bands
Geophys. Res. Lett., doi:10.1029/2022GL098938, June 2022.
[pdf]
149) L. Husbjerg, T. Neubert, O. Chanrion, K. Dimitriadou, D. Li, M. Stendel, E. Kaas
N. Østgaard, V. Reglero.
Observations of Blue Corona Discharges in Thunderclouds
Geophys. Res. Lett., doi:10.1029/2022GL099064, Accepted June 2022.
[pdf]
148) 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.
Terrestrial Gamma-ray Flashes with Accompanying Elves Detected by ASIM.
J. Geophys. Res., doi: 10.1029/2021JD036368, May 2022.
[pdf]
147) 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.
J. Geophys. Res., doi: 10.1029/2021JD036305, Apr. 2022.
[pdf]
146) K. Dimitriadou, O. Chanrion, T. Neubert, A. Protat,V. Louf, M. Heumesser, L. Husbjerg, C. Kohn, N. Østgaard and V. Reglero.
Analysis of blue corona discharges at the top of tropical thunderstorm clouds in different phases of convection.
Geophys. Res. Lett., doi: 10.1029/2021GL095879, Feb. 2022.
[pdf]
145) A. J. Castro-Tirado, N. Østgaard, E Gogus, C. Sanchez-Gil, J. Pascual-Granado,
V. Reglero, A. Mezentsev, M. Gabler, M. Marisaldi, T. Neubert, C. Budtz-Jørgensen, A. Lindanger, D.
Sarria, I. Kuvvetli, P. Cerda-Duran, J. Navarro-Gonzalez, J. A. Font, B. -B. Zhang, N. Lund, C. A. Oxborrow,
S. Brandt, M. D. Caballero-Garcia, I. M. Carrasco-Garcia, A. Castellon, M. A. Castro Tirado, F. Christiansen,
C. J. Eyles, E. Fernandez-Garcia, G. Genov, S. Guziy, Y. -D. Hu, A. Nicuesa Guelbenzu, S. B. Pandey, Z. -K.
Peng, C. Perez del Pulgar, A. J. Reina Terol, E. Rodriguez, R. Sanchez-Ramirez, T. Sun, K. Ullaland, S. Yang.
Very-high-frequency oscillations in the main peak of a magnetar giant flare.
Nature, 600, 621-624, doi:10.1038/s41586-021-04101-1, 22. Dec 2021.
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144) J. A. Lopez, J. Montanya, O. va der Velde, D. Romero, F. G.
Gordillo-Vazquez, F. J. Perez-Invernon, A. Luque, C. Morales, T. Neubert, W. Rison, P. Krehbiel, J. Navarro Gonzalez,
N. Østgaard and V. Reglero.
Initiation of lightning flashes simultaneously observed from space and the ground: Narrow bipolar events.
Atmospheric Research, doi: ATMOSRES-D-21-01137R1, accepted Dec 2021.
143) A. Lindanger, M. Marisaldi, D. Sarria, N. Østgaard,, N. Lehtinen, C. A. Skeie, A. Mezentsev, P. Kochkin,
K. Ullaland, S. Yang, G. Genov, B. E. Carlson, C. Kohn, J. Nvarro-Gonzalez, P. Connell, V. Reglero, T. Neubert.
Spectral Analysis of Individual Terrestrial Gamma-ray Flashes Detected by ASIM.
J. Geophys. Res, doi: 10.1029/2021JD035347, November 2021.
[pdf]
142) J. P. Reistad, K. Laundal, N. Østgaard, A. Ohma, S. M. Hatch, S. Haaland, A. G. Burrell, E. G. Thomas.
Quantifying the lobe reconnection rate during dominant IMF By periods.
J. Geophys. Res., doi: 10.1029/2021JA029742, October 2021.
[pdf]
141) F. Liu , G. Lu, T. Neubert, J. Lei, O. Chanrion, N. Østgaard, A. Luque, F. J.
Gordillo-Vazquez, W. Lyu, B. Zhu.
Optical emissions associated with narrow bipolar events in radio signals from thunderstorm clouds penetrating into the stratosphere.
Nature Communication, accepted October 2021.
[pdf]
140) S. Soler, F. J. Gordillo-Vazquez, F. J. Perez-Invernon, A. Luque, D. Li, T. Neubert, O. Chanrion, V. Riglero, J. Navarro-Gonzalea, N. Østgaard.
Global frequency and geographical distribution of nighttime streamer corona discharges (BLUEs) in thunderclouds.
Geophys. Res. Lett., doi: 10.1029/2021GL094657, Sept 8, 2021.
[pdf]
139) C. Maiorana , M. Marisaldi, M. Fullekrug, S. Soula, J. Lapierre, A. Mezentsev, C. Skeie, M. Heumesser, O. Chanrion, N. Østgaard, T.
Neubert, V. Reglero.
Observation of Terrestrial Gamma-ray Flashes at Mid Latitude.
J. Geophys. Res., doi: 10.1029/2020JD034432, Aug 18, 2021.
[pdf]
138) G. Branduardi-Raymont, M. Berthomier, Y. V. Bogdanova, J. A. Carter, M. Collier, A. Dimmock, M. Dunlop, R. Fear,
C. Forsyth, B. Hubert, E. A. Kronberg, K. M. Laundal, M. Lester, S. Milan, K. Oksavik, N. Østgaard, M. Palmroth1, F. Plaschke, F.
S. Porter, I. J. Rae, A. Read, A. Samsonov, S. Sembay, Y. Shprits, D. G. Sibeck, B. Walsh, M. Yamauchi.
Exploring Solar-Terrestrial Interactions
via Multiple Imaging Observers.
Experimental Astronomy, doi:10.1007/s10686-021-09784-y, Aug 16, 2021.
[pdf]
137) 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.
J. Geophys. Res,doi: 10.1029/2021JA029577, June 2021.
[pdf]
136) D. Li, A. Luque, F. J. Gordillo-Vazquez, F. Liu, G. Lu, T. Neubert, O. Chanrion, B. Zhu, N. Østgaard, V. Reglero.
Blue Flashes as Counterparts to Narrow Bipolar Events: the Optical Signal of Shallow In-Cloud Discharges.
J. Geophys. Res.doi: 10.1029/2021JD035013, June 2021.
[pdf]
135) D. Sarria , N. Østgaard, P. Kochkin, N. Lehtinen, A. Mezentsev, M.
Marisaldi, A. Lindanger, C. Maiorana, B. Carlson, T. Neubert, V. Reglero, K. Ullaland, S. Yang, G. Genov, b. Qureshi, C. Budtz-Jørgensen,
I. Kuvetli, F. Christiansen, O. Chanrion, J. Navarro-Gonzalez, C. Eyles.
Constraining spectral models of a terrestrial gamma-ray flash from a terrestrial electron beam observation by the Atmosphere-Space Interactions Monitor.
Geophys. Res. Lett, doi: 10.1029/2020GL091668, April 2021.
[pdf]
134) P. Kochkin, N. Østgaard, H. J. Christian,, J. E. Grove, M. Quick, S. Al-Nussirat, E. Wulf, S. Yang
, G. Genov, K. Ullaland, M. Marisaldi, N. Lehtinen, A. Mezentsev, D. Sarria.
A rapid Gamma-Ray Glow flux reduction observed from 20 km altitude
J. Geophys. Res., doi: 10.1029/2020JD033467, April 2021.
[pdf]
133) N. Østgaard, S. A. Cummer, A. Mezentsev, A. Luque, J. Dwyer, T. Neubert, V. Reglero, M.
Marisaldi, P. Kochkin, D. Sarria, N. Lehtinen, K. Ullaland, S. Yang, G. Genov, O. Chanrion, F.
Christiansen, Y. Pu.
Simultaneous observations of EIP, TGF, Elve and optical lightnings.
J. Geophys. Res., doi: 10.1029/2020JD033921, April 2021.
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132) J. Montanya, J. A. Lopez, C. A. Morales Rodriguez, O. A. van der Velde, F. Fabro, N. Pineda, J. Navarro-Gonzales,
V. Reglero, T. Neubert, O. Chanrion, S. J. Goodman, N. Østgaard, A. Ladino-Ricon, D. Romero, G. Sola, R. Horta, M. Freijo.
A simultenous observation of lightning by ASIM, Columbia-Lightning Mapping Array, GLM and ISS-LIS.
J. Geophys. Res., doi: 10.1029/2020JD033735, January 2021.
[pdf]
131) T. Neubert,, O. Chanrion, M. Heumesser, K. Dimitriadou, L. Husbjerg, I. Lindgaard Rasmussen, N. Østgaard, V. Reglero.
Observation of the onset of a blue jet into the stratosphere.
Nature, 589, 371-375 (2021), doi: 10.1038/s41586-020-03122-6, January 2021.
[pdf]
[On the cover of Nature]
130) M. Heumesser, O. Chanrion, T. Neubert, H. Christian, C. Kohn, K. Dimitriadou, F. J. Gordillo-Vazques, A. Luque,
F. J. Perez-Invernon, R. Blakeslee, A. Mezentsev, N. Østgaard, V. Reglero.
Spectral Observations of Optical Emissions Associated with Terrestrial Gamma-Ray Flashes.
Geophys. Res. Lett., doi: 10.1002/2020GL090700, December 2020.
[pdf]
129) A. Luque, F. J. Gordillo-Vazquez, D. Li, A. Malagon-Romero, F. J.
Perez-Invernon, A. Schmalzried, S. Soler, O. Chanrion, M. Heumesser, T. Neubert, V. Reglero, N. Østgaard.
Modeling lightning observations from space-based platforms (CloudScat.jl 1.0).
Geosci. Model Dev, November 2020.
[pdf]
128) K. M. Laundal, J. P. Reistad, S. M. Hatch, T. Moretto, A. Ohma, N. Østgaard,
P.Tenfjord, C. C. Finlay, C. Kloss.
Time-scale dependence of solar wind-based regression models of ionospheric electrodynamics.
Scientific Reports, September 2020.
[pdf]
127) O. A. van der Velde, J. Montanya, T. Neubert, O. Chanrion, N. Østgaard, S.
Goodman, J. A. Lopez, F. Fabro, V. Reglero.
Comparison of high-speed optical observations of a lightning flash from space and the ground.
Earth and Space Science, accepted July 2020.
[pdf]
126) S. Soler, F. J. Perez-Invernon, F. J. Gordillo-Vazquez, A. Luque, D. Li, A. Malagon-Romero, T. Neubert, O. Chanrion, V. Riglero, J. Navarro-Gonzalea, G. Lu, H. Zhang, A.
Huang, N. Østgaard.
Blue optical observations of narrow bipolar events by ASIM confirm corona streamer activity in thunderstorms.
J. Geophys. Res., doi: 10.1029/2020JD032708, July 2020.
[pdf]
125) C. A. Skeie, N. Østgaard, N. G. Lehtinen, D. Sarria, P. Kochkin, A.I. deBoer, M. Bardet, C. Allasia, F. Flourens.
Constraints on recoil leader properties estimated from X-ray emissions in aircraft-triggered discharges
J. Geophys. Res., doi: 10.1029/2019JD032151, June 2020.
[pdf]
124) C. Maiorana, M. Marisaldi, A. Lindanger, N. Østgaard, D. Sarria, A. Ursi, M. Galli, C. Labanti, M. Tavani, C. Pittori, F. Verrecchia.
The 3rd AGILE Terrestrial Gamma-ray Flashes Catalog. Part II: Optimized selection criteria and characteristics of the new sample
J. Geophys. Res., doi: 10.1029/2019JD031986, April 2020.
[pdf]
123) A. Lindanger, M. Marisaldi, C. Maiorana, D. Sarria, K. Albrechtsen, N. Østgaard, M. Galli, A. Ursi, C. Labanti, M. Tavani, C. Pittori, F. Verrecchia.
The 3rd AGILE Terrestrial Gamma Ray Flash catalog. Part I: Association to lightning sferics
J. Geophys. Res., doi: 10.1029/2019JD031985, April 2020.
[pdf]
122) T. Neubert , N. Østgaard, V. Reglero, O. Chanrion, M. Heumesser, K. Dimitriadou, F. Christiansen,
C. Budtz-Jørgensen, I. Kuvvetli, I. Lundgaard Radmussen, A. Mezentsev, M. Marisaldi, K. Ullaland, G. Genov, S. Yang,
P. Kochkin, J. Navarro-Gonzales, P. Connell, C. Eyles. A terrestrial gamma-ray flash and ionospheric ultraviolet emissions powered by lightning
Highlight by AGU and Cover in Science , 10 Jan 2020, Vol. 367, Issue 6474, pp. 183-186, doi: 10.1126/science.aax3872, December 2019.
[link to Science]
121) 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, K. Albrechtsen,
C. Budtz-Jørgensen, I. Kuvvetli, F. Christiansen, O. Chanrion, M. Heumesser, J. Navarro-Gonzales, P. Connell,
C. Eyles, H. Christian, S. Al Nussirat.
First ten months of TGF observations by ASIM.
J. Geophys. Res., doi: 10.1029/2019JD031214, December 2019.
[pdf]
120) D. Sarria, P. Kochkin, N. Østgaard, N. Lehtinen, A. Mezentsev, M. Marisaldi, B. E. Carlson, 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, K. Dimitriadou, J. Navarro-Gonzales, P. Connell, C. Eyles.
The First Terrestrial Electron Beam Observed by The Atmosphere-Space Interactions Monitor
J. Geophys. Res., doi: 10.1029/2019JA027071, November 2019.
[pdf]
119) A. Ohma , N. Østgaard, J. P. Reistad , P. Tenfjord, K. M. Laundal, T. Moretto Jørgensen,
S.Haaland, P. Krcelic, S. E. Milan.
Observations of Asymmetric Lobe Convection for Weak and Strong Tail Activity
J. Geophys. Res., doi: 10.1029/2019JA026773, October 2019.
[pdf]
118) J. P. Reistad, K. M. Laundal, N. Østgaard, A. Ohma, E. G. Thoams, S.Haaland K. Oksavik, S. E. Milan.
Separation and quantification of ionospheric convection sources: 2. The dipole tilt angle influence on lobe convection cells during northward IMF
J. Geophys. Res., doi: 10.1002/2019JA026634, July 2019.
[pdf]
117) J. P. Reistad, K. M. Laundal, N. Østgaard, A. Ohma, S.Haaland K. Oksavik, S. E. Milan.
Separation and quantification of ionospheric convection sources: 1. A new technique
J. Geophys. Res., doi: 10.1002/2019JA026641, July 2019.
[pdf]
116) M. Marisladi , 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, F. Verrecchia.
On the high-energy spectral component and fine time structure of terrestrial gamma-ray flashes
J. Geophys. Res., doi:10.1029/2019JD030554, June 2019.
[pdf]
115) N. Østgaard , H. J. Christian, J. E. Grove, D. Sarria, A. Mezentsev, P. Kochkin, N. Lehtinen, M. Quick, S. Al-Nussirat, E. Wulf, G. Genov, K. Ullaland, M.
Marisaldi, S. Yang, R. J. Blakeslee
Gamma-ray glow observations at 20 km altitude.
J. Geophys. Res., doi: 10.1029/2019JD030312, June 2019.
[pdf]
[link to open access]
114) T. Neubert, N. Østgaard, V. Reglero, E. Blanc, O. Chanrion, C. A. Oxborrow,
A. Orr, M. Tacconi, O. Hartnack, D. D. V. Bhanderi.
The ASIM mission on the International Space Station.
Space Science Rev.,215, 2, doi: 10.1007/s11214-019-0592-z, March 2019.
[pdf]
113) N. Østgaard, J. E. Balling, T. Bjørnsen, P. Brauer, C. Budtz-Jørgensen,
W. Bujwan, B. Carlson, F. Christiansen, P. Connell, C. Eyles, D. Fehlker, G. Genov,
P. Grudzinski, P. Kochkin, A. Kohfeldt, I. Kuvvetli, P. Lundahl Thomsen, S. Møller Pedersen,
J. Navarro-Gonzalez, T. Neubert, K. Njøten, P. Orleanski, B. Hasan Qureshi, L. Reddy Cenkeramaddi,
V. Reglero, M. Reina, J. Manuel Rodrigo, M. Rostad, M. D. Sabau, S. Savstrup Kristensen,Y. Skogseide,
A. Solberg, J. Stadsnes, K. Ullaland, S. Yang.
The Modular X- and Gamma- ray Sensor (MXGS) of the ASIM payload on the International Space Station.
Space Science Rev., 215, 2, doi: 10.1007/s11214-018-0573-7, February 2019.
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112) K. Albrechtsen, N. Østgaard, N. Berge, T. Gjesteland.
Observationally weak TGFs in the RHESSI data.
J. Geophys. Res.,doi: 10.1029/2018JD029272, November 2018.
[pdf]
111) 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
Annales Gepophysicae, doi: 10.5194/angeo-36-1577-2018, November 2018.
[pdf]
[link to open access]
110) A. Ohma, N. Østgaard, J.P. Reistad, P. Tenfjord, K. M. Laundal, K. Snekvik, S. E. Haaland, M. O. Fillingim.
Evolution of asymmetrically displaced footpoints during substorms.
J. Geophys. Res., doi: 10.1029/2018JA025869, November 2018..
[pdf]
109) D. Sarria, C. Rutjes, G. Diniz, A. Luque, K. M. A. Ihaddadene, J. R. Dwyer, N. Østgaard, A. B. Skeltved, I.
S. Ferreira and U. Ebert.
Evaluation of Monte Carlo tools for high energy atmospheric physics II: relativistic runaway electron avalanches
Journal of Geoscientific model development (GMD), October 2018.
[pdf]
[link to open access]
108) S. E. Milan, J. A. Carter, H. Sangha, K. Laundal, N. Østgaard,
P. Tenfjord, J. Reistad, K. Snekvik, j. Coxon, H. Korth, B. J. Anderson.
Timescales of dayside and nightside field-aligned current response to changes in solar wind-magnetosphere coupling.
J. Geophys. Res., 123, doi: 10.1029/2018JA025645, July 2018.
[pdf]
107) N. Lehtinen and N. Østgaard.
X-ray emissions in a multi-scale fluid model of a streamer discharge
J. Geophys. Res., 123, doi: 10.1002/2018JD028646, July 2018.
[pdf]
106) P. Kochkin, D. Sarria, C. Skeie, A. P. J. van Deursen, A. I. de Boer, M. Bardet, C. Allasia, F. Flourens, N. Østgaard.
In-flight observation of positron annihilation by ILDAS
J. Geophys. Res., doi: 10.1002/2018JD028337, June 2018.
[pdf]
105) J. P. Reistad, N. Østgaard, K. M. Laundal, A. Ohma, K. Snekvik, P. Tenfjord, A Grocott, K. Oksavik, S. E. Milan.
Observations of Asymmetries in Ionospheric Return Flow During Different Levels of Geomagnetic Activity.
J. Geophys. Res., doi: 10.1002/2017JA025051, May 2018.
[pdf]
104) K. M. Laundal, J.P. Reistad, C. C. Finley, N. Østgaard, P. Tenfjord, K. Snekvik, A. Ohma.
Interplanetary magnetic field Bx component influence on horizontal and field-aligned currents in the ionosphere.
J. Geophys. Res., doi: 10.1002/2017JA024864, April 2018.
[pdf]
103) S. Zhou , X. Luan, F. Søraas, N. Østgaard, T. Raita.
The detached aurorae induced by the solar wind pressure pulse in both hemispheres from imaging and in situ particle observations.
J. Geophys. Res., 2018.
[pdf]
102) P. Tenfjord, N. Østgaard, S. Haaland, K. Snekvik, K. M. Laundal,J.P. Reistad, R. Strangeway, S. E.
Milan, M. Hesse, A. Ohma.
How the IMF By induces a local By component during northward IMF Bz and characteristic timescales.
J. Geophys. Res., 123, doi: 10.1002/2018JA025186, March 2018.
[pdf]
101) A. Mezentsev, N. Lehtinen, N. Østgaard, F. J. Perez Invernon, S. Cummer.
Spectral characteristics of VLF sferics associated with RHESSI TGFs.
J. Geophys. Res., doi: 10.1002/2017JD027624, online December 2017.
[pdf]
100) P. Kochkin, A. P. J. van Deirsen, M. Marisaldi, A. Ursi, A. I. de Boer, M. Bardet, C. Allasia, J. F. Boissin, N. Østgaard.
In-flight observation of gamma-ray glows by ILDAS
J. Geophys. Res., Atmospheres, 122, https://doi.org/10.1002/2017JD027405, 2017.
[pdf]
99) A. B. Skeltved, N. Østgaard, N. Lehtinen, A. Mezentsev, B. Carlson.
Constraints to do realistic modeling of the electric field ahead of the tip of a lightning leader.
J. Geophys. Res. Phys, doi: 10.1002/2016JD026206, July 2017.
[pdf]
98) T. Gjesteland, N. Østgaard, P. Bitzer, H. J. Christian.
On the timing between Terrestrial Gamma ray Flashes, radio atmospherics and optical lightning emission.
J. Geophys. Res. Phys, doi: 10.1002/2017JA024285, June 2017.
[pdf]
97) K. Snekvik, N. Østgaard, P. Tenfjord, J. P. Reistad , K. M. Laundal, S. E. Milan, S. E. Haaland.
Dayside and nightside magnetic field responses at 800 km altitude to dayside reconnection
J. Geophys. Res., doi: 10.1002/2016JA023177, February 2017.
[pdf]
96) S. E. Milan, L. B. N. Clausen, J. C. Coxon, J. A. Carter. M. T. Walach. K. Laundal, N. Østgaard,
P. Tenfjord, J. Reistad, K. Snekvik, H. Korth, B. J. Anderson.
Overview of solar wind-magnetosphere-ionosphere-atmosphere coupling and the generation of magnetospheric currents.
Space Sci. Rev., doi: 10.1007/s11214-017-0333-0, 1. February 2017.
[pdf]
95) S. E. Haaland, B. Lybekk, L. Maes, K. M. Laundal, A. Pedersen, P. Tenfjord, A. Ohma, N. Østgaard, J. P. Reistad , K. Snekvik
North-south asymmetries in cold plasma density in the magnetosphere: Cluster observations
J. Geophys. Res., doi: 10.1002/2016JA023404, January 2017.
[pdf]
94) P. Tenfjord, N. Østgaard, R. Strangeway, S. E. Haaland, K. Snekvik, K. M. Laundal,
J. P. Reistad, S. E. Milan.
Magnetospheric response and reconfiguration times following IMF By reversals
J. Geophys. Res, doi: 10.1002/2016JA023018, December 2016.
[pdf]
93) 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
Geosci. Model Dev, doi: 10.5194/gmd-9-3961-2016, November 2016.
[pdf]
92) P. Kochkin, N. Lehtinen, A. P. J. van Deursen, N. Østgaard.
Pilot system development in metre-scale laboratory discharge
J. Phys. D: Appl. Phys., 49, 425203, doi:10.1088/0022-3727/49/42/425203, September 2016.
[pdf]
91) A. Mezentsev, N. Østgaard, T. Gjesteland, K. Albrechtsen, M. Marisaldi, D. Smith, S. Cummer.
Radio emissions from double RHESSI TGFs
J. Geophys. Res, doi: 10.1002/2016JD025111, July 2016.
[pdf]
90) J. P. Reistad, N. Østgaard, P. Tenfjord, K. M. Laundal, K. Snekvik, S. Haaland, S. E. Milan, K. Oksavik, H. U. Frey, A Grocott.
Dynamic effects of restoring footpoint symmetry on closed magnetic field-lines.
J. Geophys. Res., 121, doi: 10.1002/2015JA022058, May 5, 2016.
[pdf]
89) K. M. Laundal, J. W. Gjerloev, N. Østgaard, J. P. Reistad, S. E. Haaland,
K. Snekvik, P. Tenfjord, S. Ohtani, S. E. Milan.
The impact of sunlight on high-latitutde equivalent currents.
J. Geophys. Res., doi: 10.1002/2015JA022236. February 2016.
[pdf]
88) N. Østgaard, B. E. Carlson, R. Nisi, T. Gjesteland, Ø. Grøndahl, A. Skeltved, N. G. Lehtinen,
A. Mezentsev, M. Marisaldi, P. Kochkin.
Relativistic electrons from sparks in the laboratory
J. Geophys. Res, doi: 10.1002/2015JD024394, February 2016.
[pdf]
87) N. Østgaard, K. H. Albrechtsen, T. Gjesteland, A. Collier.
A new population of Terrestrial Gamma-ray Flashes in the RHESSI data
Geophys. Res. Lett. doi: 10.1002/2015GL067064, December 2015.
[pdf]
[link to open access]
86) Natalia Yu. Ganushkina, Michael W. Liemohn, Olga Amariutei, Ioannis A. Daglis, Iannis Dandouras, Stepan Dubyagin, Darren L. De Zeeuw,
Yusuke Ebihara, Raluca Ilie, Roxanne Katus, Marina Kubyshkina, Stephen E. Milan, Shinichi Ohtani, Nikolai Østgaard, Jone P. Reistad, Paul
Tenfjord, Frank Toffoletto and Sorin Zaharia.
Defining and resolving current systems in geospace
Annales Geophysicae Special Issue: Dynamic processes in geospace, 33, 1369-1402, doi:10.5194/angeo-33-1369-2015, November 2015.
[pdf]
85) T. Gjesteland , N. Østgaard, S. Laviola, M. M. Miglietta, E. Arnone, M. Marisaldi, F. Fuschino,
A. B. Collier, F. Fabro, J. Montanya.
Observation of intrinsic bright Terrestrial Gamma
2 ray Flashes from the Mediterranean basin
J. Geophys. Res, doi: 10.1002/2015JD023704, December 2015.
[pdf]
[link to open access]
84) B. E. Carlson, N. Østgaard, P. Kochkin, Ø. Grøndahl, R. Nisi, K. Weber, Z, Scherrer, K. LeCaptain.
Meter-scale spark x-ray spectrum statistics
J. Geophys. Res, doi: 10.1002/2015JD023849, November 2015.
[pdf]
[link to open access]
83) 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.
Enhanced detection of Terrestrial Gamma-Ray Flashes by AGILE
Geophys. Res. Lett., doi: 10.1002/2015GL066100, November 2015.
[pdf]
[link to open access]
82) P. Tenfjord, N. Østgaard, K. Snekvik, K. M. Laundal,
J. P. Reistad, S. E. Haaland, S. E. Milan.
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
J. Geophys. Res, 120, doi: 10.1002/2015JA021579, November 2015.
[pdf]
[link to open access]
81) K. M. Laundal, S. E. Haaland, N. Lehtinen, J. W. Gjerloev, N. Østgaard,
P. Tenfjord, J. P. Reistad, K. Snekvik, S. E. Milan, S. Ohtani, B. J. Anderson.
Birkeland current effects on high-latitude ground magnetic field perturbations
Geophys. Res. Lett., doi: 10.1002/2015GL065776, September 2015.
[pdf]
[link to open access]
80) J. P. Reistad, N. Østgaard, K. M. Laundal, S. Haaland, P. Tenfjord, K. Snekvik,
K. Oksavik, S. E. Milan.
Intensity asymmetries in the dusk sector of the poleward auroral oval due to IMF Bx
J. Geophys. Res., 119, doi:10.1002/2014JA020216, 2014.
[pdf]
[link]
79) A. B. Skeltved, N. Østgaard, B. Carlson, T. Gjesteland, S. Celestin.
Modeling the Relativistic Runaway Electron Avanche and the feedback mechanism with GEANT4
J. Geophys. Res., 119. doi:10.1002/2014JA020504, 2014.
[pdf]
78) R. S. Nisi, N. Østgaard, T. Gjesteland, A. B. Collier
An altitude and distance correction to the initial fluence distribution of TGFs
J. Geophys. Res. Space Physics, 119, doi:10.1002/2014JA019817, 2014.
[pdf]
77) P. Tenfjord and N. Østgaard.
Energy transfer and flow in the solar wind-magnetosphere-ionosphere system: A new coupling function.
J. Geophys. Res., Vol. 118, 1-14, doi:10.1002/jgra.50545, 2013.
[pdf]
An edited version of this paper was published by AGU. Copyright (2013) American Geophysical Union:
[link]
76) J. P. Reistad, N. Østgaard, K. M. Laundal, K. Oksavik.
Generator mechanisms of non-conjugate auroras
J. Geophys. Res., Vol. 118, Issue 6, pg 3394-3406, doi: 10.1002/jgra50300, in press, 2013.
An edited version of this paper was published by AGU. Copyright (2013) American Geophysical Union
[pdf]
75) 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
J. Geophys. Res., Vol. 118, Issue 5, pg. 2333-2339, doi: 10.1002/jgra.50143, 2013.
An edited version of this paper was published by AGU. Copyright (2013) American Geophysical Union
[pdf]
74) N. Østgaard, T. Gjesteland, B. E. Carlson, A. B. Collier,
S. A. Cummer, G. Lu and H. J. Christian.
Simultaneous observations of optical lightning and terrestrial gamma ray flash from space.
Geophys. Res. Lett.,Vol. 40, 1-4, doi:10.1002/grl.50466, 2013.
An edited version of this paper was published by AGU. Copyright (2013) American Geophysical Union
[pdf]
73) N. Østgaard, B. K. Humberset, K. M. Laundal.
Correction to 'Evolution of auroral asymmetries in the conjugate hemispheres during two substorms.' (paper #59 below)
Geophys. Res. Lett., doi:10.1029/2012GL055020. 2013.
[pdf]
72) S. Milan, M. Dunlop, A. Fazakerley, B. Hubert, B. Lavraud,
N. Østgaard, J. Shi, C. P. Escoubet, M. Taylor, P. Falkner, A. Wielders
KuaFu Sun-Earth connection explorer
Astronomy and Geophysics., 2012
[pdf]
71) S. Haaland, A. Eriksson, E. Engwall, B. Lybekk, H. Nilsson, A. Pedersen,
K. Svenes, M. Andre, M. Forster, K. Li, C. Johnsen, N. Østgaard.
Estimating the capture and loss of cold plasma from ionospheric outflow.
J. Geophys. Res., Vol. 117, A07311, doi:10.1029/2012JA017679, 2012.
[pdf]
70) N. Østgaard, K. M. Laundal, L. Juusola , A. Aasnes, S. E. Haaland, J. M. Weygand.
Correction to 'Interhemispherical asymmetry of substorm onset locations and the Interplanetary Magnetic Field.' (paper #60 below)
Geophys. Res. Lett., Vol. 39, L10104, 2012.
[pdf]
AGU
69) N. Østgaard, T. Gjesteland, R. S. Hansen, A. B. Collier, B. E. Carlson
The true fluence distribution of terrestrial gamma flashes at satellite altitude.
J. Geophys. Res, Vol. 117, A03327, doi:10.1029/2011JA017365, 2012.
[pdf]
AGU
68) T. Gjesteland, N. Østgaard, A. B. Collier, B. E. Carlson, C. Eyles, D.
M. Smith. A new method reveals more TGFs in RHESSI data, Geophys. Res. Lett., Vol. 39, L05102,
doi:10.1029/2012GL050899, 2012
[pdf]
67) K. Snekvik, E. Tanskanaen, N. Østgaard, L. Juusola, K. M. Laundal,
E. I. Gordeev, A. L. Borg.
Changes in the magnetotail configuration before near-Earth reconnection.
J. Geophys. Res, Vol. 117, A02219, doi:10.1029/2011JA017040, 2012.
[pdf]
66) B. E. Carlson, T. Gjesteland, N. Østgaard.
Connecting the terrestrial gamma-ray flash source strength and observed fluence distributions,
J. Geophys. Res., Vol. 117, A01314, doi:10.1029/2011JA017122, 2012.
[pdf]
65) B. E. Carlson, T. Gjesteland, N. Østgaard.
Terrestrial gamma-ray flash electron beam geometry, fluence, and detection frequency.
J. Geophys. Res., Vol.116, No. A11, A11217, doi:10.1029/2011JA016812, 2011.
[pdf]
64) T. Gjesteland, N. Østgaard, A. B. Collier, B. E. Carlson, M. B. Cohen, N. G. Lehtinen
Confining the Angular Distribution of Terrestrial Gamma-ray Flash Emission.
J. Geophys. Res, 116, A11313, doi:10.1029/2011JA016716, 2011.
[pdf]
63) L. Juusola, N. Østgaard, E. Tanskanaen, N. Partamies, K. Snekvik.
Earthward Plasma Sheet Flows During Substorm Phases.
J. Geophys. Res, Vol. 116, A10228, doi:10.1029/2011JA016852, 2011.
[pdf]
62) A. Collier, T. Gjesteland, N. Østgaard.
Assessing the Power Law Distribution of TGFs.
J. Geophys. Res, Vol. 116, A10320, doi:10.1029/2011JA016612, 2011.
[pdf]
61) L. Juusola, N. Østgaard, E. Tanskanaen.
Statistics of Plasma Sheet Convection.
J. Geophys. Res, Vol. 116, A08201,
doi:10.1029/2011JA016479, 2011.
[pdf]
AGU
60) N. Østgaard, K. M. Laundal, L. Juusola , A. Aasnes, S. E. Haaland, J. M. Weygand.
Interhemispherical asymmetry of substorm onset locations and the Interplanetary Magnetic Field.
Geophys. Res. Lett., Vol. 38, L08104, doi:10.1029/2011GL046767, 2011.
See paper #70 with correction
[pdf]
AGU
59) N. Østgaard ,B. K. Humberset, K. M. Laundal.
Evolution of auroral asymmetries in the conjugate hemispheres during two substorms.
Geophys. Res. Lett., Vol. 38, L03101, doi:10.1029/2010GL046057, 2011.
See paper #73 with correction
[pdf]
AGU
58) K. M. Laundal, N. Østgaard, H. U. Frey, J. Weygand.
Seasonal and IMF dependent polar cap contraction during substorm expansion phase
J. Geophys. Res., Vol. 115, A11224, doi: 10.1029/2010JA015910, 2010.
[pdf]
57) H. U. Frey, O. Amm, C. C. Chaston, S. Fu, G. Haerendel, L. Juusola , T.
Karlsson, B. Lanchester, R. Nakamura, N. Østgaard, T. Sakanoi, E. Seran , D.
Whiter, J. Weygand, K. Asamura and M. Hirahara. Small and Meso-scale Properties of a Substorm Onset Auroral
Arc.
J. Geophys. Res., Vol. 115, A10209, doi:10.1029/2010JA015537, 2010.
[pdf]
56) K. M. Laundal, N. Østgaard, K. Snekvik, H. U. Frey.
Inter-hemispheric observations of emerging polar cap
asymmetries
J. Geophys. Res., Vol. 115, No. A7, A07230, doi: 10.1029/2009JA015160.
[pdf]
AGU
55) T. Gjesteland, N. Østgaard, P. H. Connell , J. Stadsnes , G. J. Fishman,
Effects of deadtime losses on Terrestrial Gamma ray Flash (TGF) measurements with the Burst and
Transient Source Experiment (BATSE)
J. Geophys. Res., Vol. 115, A00E21, doi: 10.1029/2009JA014754, 2010.
[pdf]
54) K. M. Laundal and N. Østgaard Asymmetric auroral intensities in the Earth's Northern and Southern
hemispheres.
Highlight and Cover in Nature Letters, Vol. 460, pg. 491-493, doi:10.1038/nature08154, 2009.
paper from the nature site
the cover at nature site
download an e-print version
53) 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?
J. Geophys. Res, 114, A06204,doi:10.1029/2009JA014185, 2009.
JGR site: id & pssw: 20978614
[pdf]
52) 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,
Stephen M. Petrinec, Bradford J Wargelin, Ina Robertson, Peter Beiersdorfer,
Steven L. Snowden, Vasili Kharchenko. X-ray emission from planets and comets: Relationship with solar X-rays and Solar Wind,
Advances in Geosciences, October, Vol 15, Planetary Science, 2009.
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URL reference
51) K. Snekvik, L. Juusola , O. Amm, N. Østgaard.
Reconnection Hall current system observed in the magnetotail
and in the ionosphere.
Geophys. Res. Lett., Vol. 36, L08104, doi:10.1029/2009GL037239, 2009.
[pdf]
50) K. Snekvik, R. Nakamura, N. Østgaard, S. Haaland, A. Retino.
The Hall current system revealed as a statistical significant pattern during fast flows.
Ann. Geophys., Vol 26, No 11, 3429-3437, 2008
[pdf]
49) K. M. Laundal and N. Østgaard Persistent Global Proton Aurora Caused by High Solar Wind Pressure.
J. Geophys. Res., Vol. 113, A08231, doi:10.1029/2008JA013147, 2008.
[pdf]
48) N. Østgaard ,T. Gjesteland, J. Stadsnes, P. H. Connell, B. Carlson.
Production altitude and time delays of the terrestrial gamma flashes:
Revisiting the Burst and Transient Source Experiment spectra.
J. Geophys. Res., 113, A02307, doi:10.1029/2007JA012618, 2008.
[pdf]
47) C. Sætre , C. A. Barth, J. Stadsnes, N. Østgaard, S. M. Baily,
D. N. Baker, G. A. Germany and J. W. Gjerloev. Thermospheric nitric oxide at higher
latitudes - Model calculations with auroral energy input.
J. Geophys. Res., Vol. 112, No. A8, A08306, doi: 19.1029.2006JA012203, 2007.
[pdf]
46) K. Snekvik, S. Haaland, N. Østgaard, H. Hasegawa, R. Nakamura, T. Takada, F. Pitout,
H. R`eme, B. Klecker, and E. A. Lucek.
Cluster observations of a field aligned current at the dawn
flank of a bursty bulk flow.
Ann. Geophys., 25, 1405-1415, 2007.
[pdf]
45) A. L. Borg, N. Østgaard, A. Pedersen M. Øieroset, T. D. Phan, G.
Germany, A. Aasnes, W. Lewis, J. Stadsnes, E. A. Lucek, H. R`eme, C. Moukis. Simultaneous observations of magnetotail
reconnection and bright X-ray aurora on 2. October 2002.
J. Geophys. Res., Vol. 112, No. A6, A06215, doi: 10.1029/2006JA011913, 2007.
[pdf]
44) Anil Bhardwaj, Ronald F. Elsner, G. Randall Gladstone,
Thomas E. Cravens, Carey M. Lisse, Konrad Dennerl, Graziella Branduardi-Raymont, Brad Wargelin, J. Hunter Waite Jr., Ina Robertson,
Nikolai Østgaard, Peter Beiersdorfer,
Steven L. Snowden,
Vasili Kharchenko. X-rays from Solar System Bodies,
Review paper in Planet Space Science, Vol 55/9, pp 1135-1189, doi: 10.1016/j.pss.2006.11.009, 2007.
[online pdf]
43) N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes, J. Weygand.
Auroral conjugacy studies based on global imaging
J. Atmos. Solar-Terr. Phys., special issue from Yosemite 2006, 69, 249-255, 2007.
[pdf]
42) Anil Bhardwaj , G. Randall Gladstone, Ronald F. Elsner, Nikolai Østgaard, J. Hunter
Waite, Jr., Thomas E. Cravens, Shen-Wu Chang, Tariq Majeed, Albert E. Metzger.
First terrestrial soft X-ray auroral observation by the Chandra X-ray Observatory.
J. Atmos. Solar-Terr. Phys., Vol 69/ 1-2 pp 179-187, DOI: 10.1016/j.jastp.2006.07.011, 2007.
[pdf]
41) C. Sætre , C. A. Barth, J. Stadsnes, N. Østgaard, S. M. Baily,
D. N. Baker and J. W. Gjerloev. Comparison of electron energy deposition calculated
by a photochemical nitric oxide model, and derived
from X.ray bremsstrahlung measurements
J. Geophys. Res., Vol. 111, No. A4, A04301
doi:10.1029/2005JA011399, 2006.
[pdf]
40) A. Aksnes , J. Stadsnes, N. Ostgaard, G. A. Germany, K. Oksavik,
R. R. Vondrak, A. Brekke, U. P. Lovhaug.
Height profiles of the ionospheric electron density derived using
space-based remote sensing of UV and X-ray emissions, and EISCAT radar
data: A ground-truth experiment.
J. Geophys. Res., Vol. 111, No. A2, A02301, doi:10.1029/2005JA011331, 2006.
[pdf]
39) E. Tanskanen, M. Palmroth, T.I. Pulkkinen, H.E.J. Koskinen, P. Janhunen, N. Østgaard, J.A.
Slavin, K. Liou. Energetics of a substorm on 15 august, 2001: comparing empirical methods and a
global MHD simulation.
Advances in Space Research, 36, 10, 1825, 2005.
[pdf]
38) N. Østgaard, S. B. Mende , H. U. Frey , J. B.
Sigwarth. Simultaneous imaging of the reconnection spot in the
conjugate hemispheres during northward IMF.
Highlight in Geophys. Res. Lett., Vol. 32, No. 21, L21104, doi: 10.1029/2005GL024491, 2005.
[pdf]
37) M. Palmroth , P. Janhunen, T. I. Pulkkinen, A. Aksnes, G. Lu , N. Østgaard,
J. Watermann, G. D. Reeves, G. A. Germany. Assessment of ionospheric Joule heating by
GUMICS-4 MHD simulation, AMIE, and satellite-based statistics:
Towards a synthesis.
Annales Geophysicae, 23, 2051-2068, 2005,
[pdf]
36) A. Åsnes, J. Stadsnes, R. W. Friedel, N. Østgaard, M. Thomsen.
Medium energy pitch anglke distribution during substorm injected electron
cloud.
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34) O. Amm, A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany,
G. Lu, A. Viljanen. Mesoscale ionospheric electrodynamics of omega bands determined
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33) A. Aksnes, O. Amm, J. Stadsnes, N. Østgaard, G. A. Germany, R. R. Vondrak,
I. Sillanpaa. Ionospheric conductances derived from satellite measurements
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32) A. Kozlovsky, V. Safargaleev, N. Østgaard, T. Turunen, J. Jussila, A
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31) N. Østgaard, N. A. Tsyganenko, S. B. Mende , H. U. Frey , T. J. Immel, M. Fillingim, L. A. Frank, J. B.
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30) N. Østgaard, J. Moen, S. B. Mende, H. U. Frey, T. J. Immel, P. Gallop, K.
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29) T. J. Stubbs , R. R. Vondrak and N. Østgaard, J. B. Sigwarth and
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24) C. J. Farrugia, P. E. Sandholt, R. B. Torbert, N. Østgaard. Temporal and spatial
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23) H.U. Frey , N. Østgaard, T.J. Immel, H. Korth, S.B. Mende,
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22) A. Aksnes, J Stadsnes, G. Lu, N. Østgaard, R. R. Vondrak, D. L. Detrick, T. J. Rosenberg,
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21) N. Østgaard, S. B. Mende, H. U.
Frey, L. A. Frank , J. B. Sigwarth. Observations of non-conjugate theta
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20) M. Meurant, J.-C. Gérard, B. Hubert, C. Blockx,
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FAST and IMAGE-FUV observations of a Substorm onset.
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18) H. U. Frey, S. B. Mende, T. J. Immel, S. A. Fuselier, N. Østgaard. Proton aurora in the
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P. Stauning. Conjugate high-intensity energetic electron precipitation at high latitude.
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13) N. Østgaard, D. L. Detrick, T. J. Rosenberg, R. R. Vondrak, H. U. Frey, S. B. Mende, S. E. HÅland, J.
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Thorsen, S. Chernouss. Structure of polar aurora over Kola Peninsula and X-ray oval measured by Polar
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Geomagnetism and Aeronomie, No.3, 2000.
6) N. Østgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A Cummer, D. L. Chenette, M. Schulz, J. G.
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3) S. Håland, N. Østgaard, J. Bjordal, J. Stadsnes, S. Ullaland, G. D. Reeves, D. L. Chenette, B. Wilken, T.
Yamamoto, T. Doke, G. K. Parks, M. J. Brittnacher. Magnetospheric and Ionospheric Response to a Substorm:
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1) N. Østgaard, J. Stadsnes, K. Aarsnes, F. Søraas, Karl Måseide, M. Smith, J.Sharber. Simultaneous
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6) N. Østgaard, J. P. Reistad, P. Tenfjord, K. M. Laundal, K. Snekvik, S. E. Milan, S. Haaland.
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Auroral Signatures of the Dynamic Plasma Sheet
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3)N. Østgaard and K. M. Laundal
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Their Mappings to the Equatorial Magnetosphere.
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19) S. Haaland, L. Baddeley, K. Olafsson, N. Partamies, E. Tanskanen, A. Vaivads, N. Østgaard.
Looking South for the Northern Light.
Proceedings from the ICS 13, 2017, New Hampshire, US, 2017.
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18) P. Kochkin , A. P. J. van Deursen, A. I. Boer, M. Bardet, C. Allasia, J. -F. Boissin, N. Østgaard.
In-flight measurements of high-energy lightning-related atmospheric phenomena
2017 International Conference on Lightning and Static Electricity, Nagoya, Japan.
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17) M. Marisaldi , D.M. Smith, S. Brandt, M.S. Briggs, C. Budtz-Jørgensen,
R. Campana, B.E. Carlson, S. Celestin, V. Connaughton, S.A. Cummer, J.R. Dwyer,
G.J. Fishman, M. Fullekrug, F. Fuschino, T. Gjesteland, T. Neubert, N. Østgaard, M. Tavani.
High-energy radiation from thunderstorms and lightning with LOFT
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16) M. Berthomier, A. N. Fazakerley, C. Forsyth, R. Pottelette,
O. Alexandrova, A. Anastasiadis, A. Aruliah, P.-L. Blelly, C. Briand,
R. Bruno, P. Canu, B. Cecconi, T. Chust, I. Daglis, J. Davies, M. Dunlop,
D. Fontaine, V. Génot, B. Gustavsson, G. Haerendel, M. Hamrin,
M. Hapgood, S. Hess, D. Kataria, K. Kauristie, S. Kemble,
Y. Khotyaintsev, H. Koskinen, L. Lamy, B. Lanchester, P. Louarn,
E. Lucek, R. Lundin, M. Maksimovic, J. Manninen, A. Marchaudon,
O. Marghitu, G. Marklund, S. Milan, J. Moen, F. Mottez, H. Nilsson,
N. Ostgaard, C. J. Owen, M. Parrot, A. Pedersen, C. Perry, J.-L. Pinçon,
F. Pitout, T. Pulkkinen, I. J. Rae, L. Rezeau, A. Roux, I. Sandahl,
I. Sandberg, E. Turunen, J. Vogt, A. Walsh, C. E. J. Watt, J. A. Wild,
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15) L. R. Cenkeramaddi, G. Genov, K. Njøten, M. E. Rostad, Y. Skogseide, M. Roscoe, A. Solberg, J. Stadsnes, K. Ullaland, N. Østgaard,
C. Budtz-Jørgensen, I. Kuvvetli, S. Mikkelsen, G. Mæhlum. Low-energy CZT detector array
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2012 IEEE International Instrumentation and Measurement Technology Conference, Graz, Austria, May 13-16, 2012.
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14) Y. Skogseide, L. R. Cenkeramaddi, G. Genov, K. Njøten, M. E. Rostad, A. Solberg, J. Stadsnes, K. Ullaland, N. Østgaard,
C. Budtz-Jørgensen, I. Kuvvetli. BGO Front-End Electronics and Signal Processing in the MXGS Instrument for the ASIM Mission.
2012 IEEE International Instrumentation and Measurement Technology Conference, Graz, Austria, May 13-16, 2012.
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13) A. Collier, T. Gjesteland, N. Østgaard.
Terrestrial Gamma-ray Flash Intensity Distribution. Proceedings of the URSI GA, 2011.
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12) B. E. Carlson, T. Gjesteland, N. Østgaard.
The frequency of Terrestrial Gamma-ray Flash Electron Beam Observations. Proceedings of the URSI GA, 2011.
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11) T. Gjesteland, N. Østgaard, A. B. Collier, B. E. Carlson, M. B. Cohen, N. G. Lehtinen
Confining the Angular Distribution of TGF Emission. Proceedings of the URSI GA, 2011.
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10) J-B Renard, G Berthet, V Catoire, N Huret,
D Lagoutte, F Lefeuvre, J-L Pincon, C Robert, M Tagger, E Seran, M Godefroy, P-L Blelly, S Soula,
S Coquillat, N Østgaard, T Neubert, F Lebrun
COBRAT project: Long duration balloons for the study of high energy phenomena and consequence for stratospheric chemistry,
19th ESA symposium on balloon and rocket, 2009.
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9) K. Olafsson, N. Østgaard and E. Tanskanen
The Space Science Suitcase - Instruments for exploring Near-Earth Space from Classroom, Earth Moon Planet, doi 10.1007/s11038-008-9261-z, 2008.
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8) C. Budtz-Jørgensen I. Kuvvetli, Y. Skogseide, K. Ullaland, N. Østgaard.
Characterization fo CZT detectors fro the ASIM mission, Converence Record from IEEE, Dresden, October 2008.
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7) S. Mikkelsen D. Meier, G. Mæhlum, B. Sundal, J. Talebi,
A. Helland, N. Østgaard, Y. Skogseide, K. Ullaland.
Low-Power and Low-Noise Multi Channel ASIC for X-ray and Gamma-Ray Spectrosopy,
AMISCA, Cascais, Portugal, August 2008.
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6) N. Østgaard , S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes, J. Weygand.
Conjugate imaging of substorms.
Proceedings from the ICS 8, 2006, in Banff, Canada, ISBN 978-0-88953-312-7, 2007.
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5) T. Neubert, I. Kuvvetli, C. Budtz-Jorgensen, N. Østgaard, V. Reglero,
N. Arnold. The Atmosphere-Space Interactions Monitor (ASIM) for the International
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4) J. Nystrand, K. BrØnstad, G. Eigen, F. Eisele, P. Fischer, H.
Helstrup, N. Herrmann, V. Lindenstruth, R. Männer, K. Meier, N. Østgaard, D.
Röhrich, B. Skaali, J. Stachel, J. Stadsnes, S. Stapnes, B. Stugu, B.G.
Svensson, T. Tveter, K. Ullaland, and U. Uwer. The International Research
Training Group. Development and Application of Intelligent Detectors.
Proceedings from the EUI-Net conference, Tallin, May, 2006.
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3) O. Amm, A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany,
I. Sillanpaa. Observations and analysis of ionospheric electrodynamics during
a substorm recovery phase using the MIRACLE network.
Proceedings from the ICS 7 in Finland, 2004.
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2) A. Bhardwaj , G. R. Gladstone, R. F. Elsner, J. H. Waite, Jr., D. Grodent,
T. E. Cravens, R. R. Howell, A. E. Metzger, N. Østgaard, A. Maurellis,
R. E. Johnson, M. C. Weisskopf, T. Majeed , P. G. Ford, A. F. Tennant,
J. T. Clarke, W. S. Lewis, K. C. Hurley, F. J. Crary, E. D. Feigelson,
G. P. Garmire, D. T. Young, M. K. Dougherty, S. A. Espinosa, J.-M. Jahn.
Soft X-ray emissions from planets, moons and comets.
ESA-SP-514, Proc. ESLAB 36
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3-8 June 2002, pp215-226. 2002.
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1) N. Østgaard, J. Stadsnes, J. Bjordal, E. Thorsen, R. R. Vondrak, S. A. Cummer, D. L. Chenette, G. K. Parks,
M. J. Brittnacher, D. L. McKenzie. Global Scale Electron Precipitation During Substorm Expansions.
Proceedings of the International Conference on Substorms -4, 55 - 58, 1998, Terra Scientific Publishing
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3) T. Gjesteland, N. Østgaard, R. S. Hansen, J. Stadsnes, Jordiske Gammaglimt.
Fra Fysikkens Verden, Nr. 2 - 2010, 72 Årgang
2) N. Østgaard, J. Bjordal, J. Stadsnes, E. Thorsen. PIXIE data processing at the University of Bergen.
Scientific/Technical Report No 1999-05, Dept. of Physics, University of Bergen, ISSN 0803-2696, May 1999.
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1) N. Østgaard, J. Stadsnes, K. Aarsnes, F. Søraas, M. Smith. PULSAUR II Launched 01.23 MLT 9.2.1994: X-ray
Measurements During a Pulsating Aurora.
Scientific/Technical Report No 1996-08, Dept. of Physics, University
of Bergen, ISSN 0803-2696, August 1996