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ONGOING PROJECTS
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EARLIER PROJECTS
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+ SIR-2
+ INTEGRAL
+ IMAGE
+ ESPRIT


Earlier satellite projects [pdf]

Earlier rocket projects [pdf]
2013


F. Søraas, and M. Sørbø, Low altitude observations of ENA from the ring current and from the proton oval, J. Atm. Solar-Terr. Phys., in press.

N. Østgaard, B. K. Humberset, K. M. Laundal, Correction to ''Evolution of auroral asymmetries in the conjugate hemispheres during substorms'', Geophys. Res. Lett., doi:10.1029/2012GL055020, in press.

M. Förster, Y. I. Feldstein, L. I. Gromova. L. A. Dremukhina, A. E. Levitin, and S. E. Haaland, Some aspects of modelling the high-latitude ionospheric convection from Cluster/EDI data, Geomagnetism and Aeronomy, 53 (1), 85-95, 2013.
[pdf]

J. Moen, K. Oksavik, L. Alfonsi, Y. Daabakk, V. Romano, and L. Spogli, Space weather challenges of the polar cap ionosphere, J. Space Weather Space Clim., 3, A02, 2013.
[pdf]

2012


E. A. Kronberg, S. E. Haaland, P. W. Daly, E. E. Grigorenko, L. M. Kistler, M. Fränz, and I. Dandouras, Oxygen and hydrogen ion abundance in the near-Earth magnetosphere: Statistical results on the response to the geomagnetic and solar wind activity conditions, J. Geophys. Res, 117, A12208, doi:10.1029/2012JA018071, 2012.
[pdf]

N. Østgaard, and K. M. Laundal, Auroral asymmetries in the conjugate hemispheres and interhemispheric currents, in Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets, Geophys. Monogr. Ser., vol. 197, edited by A. Keiling et al., 99-111, AGU, Washington, D. C., doi:10.1029/2011GM001190, 2012.
[abstract]

S. R. Kaeppler, C. A. Kletzing, S. R. Bounds, J. W. Gjerloev, B. J. Anderson, H. Korth, J. W. LaBelle, M. P. Dombrowski, M. Lessard, R. F. Pfaff, D. E. Rowland, S. Jones, and C. J. Heinselman, Current closure in the auroral ionosphere: Results from the auroral current and electrodynamics structure rocket mission, in Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets, Geophys. Monogr. Ser., vol. 197, edited by A. Keiling et al., 183-192, AGU, Washington, D. C., doi:10.1029/2011GM001177, 2012.
[abstract]

A. Keiling, K. Shiokawa, V. Uritsky, V. Sergeev, E. Zesta, L. Kepko, and N. Østgaard, Auroral signatures of the dynamic plasma sheet, in Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets, Geophys. Monogr. Ser., vol. 197, edited by A. Keiling et al., 317-335, AGU, Washington, D. C., doi:10.1029/2012GM001231, 2012.
[abstract]

M. Daae, P. Espy, H. Nesse Tyssøy, D. Newnham, J. Stadsnes, and F. Søraas, The effect of energetic electron precipitation on middle mesospheric night-time ozone during and after a moderate geomagnetic storm, Geophys. Res. Lett., 39, L21811, doi:10.1029/2012GL053787, 2012.
[pdf]

K. Oksavik, J. Moen, M. Lester, T. A. Bekkeng, and J. K. Bekkeng, In situ measurements of plasma irregularity growth in the cusp ionosphere, J. Geophys. Res., 117, A11301, doi:10.1029/2012JA017835, 2012.
[pdf]

K. Li, S. Haaland, A. Eriksson, M. André, E. EngwalL, Y. Wei, E. A. Kronberg, M. Fränz, P. W. Daly, H. Zhao, and Q. Y. Ren, On the ionospheric source region of cold ion outflow, Geophys. Res. Lett., 39, L18102, doi:10.1029/2012GL053297, 2012.
[pdf]

M. A. Young, M. Lessard, M. Engebretson, J. R. Woodroffe, and K. Oksavik, Spectral enhancements associated with Pi1B events observed at high latitude, J. Geophys. Res., 117, A09314, doi:10.1029/2012JA017940, 2012.
[pdf]

R. C. Fear, S. E. Milan, and K. Oksavik, Determining the axial direction of high-shear flux transfer events: Implications for models of FTE structure, J. Geophys. Res., 117, A09220, doi:10.1029/2012JA017831, 2012.
[pdf]

J. W. Gjerloev, The SuperMAG data processing technique, J. Geophys. Res., 117, A09213, doi:10.1029/2012JA017683, 2012.
[pdf]

B. M. Walsh, S. E. Haaland, P. W. Daly, E. A. Kronberg, and T. A. Fritz, Energetic electrons along the high-latitude magnetopause, Ann. Geophys., 30, 1003-1013, 2012.
[pdf]

S. Haaland, A. Eriksson, E. Engwall, B. Lybekk, H. Nilsson, A. Pedersen, K. Svenes, M. André, M. Förster, K. Li, C. Johnsen, and N. Østgaard, Estimating the capture and loss of cold plasma from ionospheric outflow, J. Geophys. Res., 117, A07311, doi:10.1029/2012JA017679, 2012.
[pdf]

S. Ohtani, H. Korth, S. Wing, E. R. Talaat, H. U. Frey, and J. W. Gjerloev, The double auroral oval in the dusk-midnight sector: Formation, mapping and dynamics, J. Geophys. Res., 117, A08203, doi:10.1029/2011JA017501, 2012.
[pdf]

N. Østgaard, K. M. Laundal, L. Juusola, A. Åsnes, S. E. Haaland, and J. M. Weygand, Correction to ''Interhemispherical asymmetry of substorm onset locations and the interplanetary magnetic field'', Geophys. Res. Lett., 39, L10104, doi:10.1029/2012GL052319, 2012.
[pdf]

E. J. Lund, M. R. Lessard, F. Sigernes, D. A. Lorentzen, K. Oksavik, P. M. Kintner, K. A. Lynch, D. H. Huang, B. C. Zhang, H. G. Yang, and Y. Ogawa, Electron temperature in the cusp as measured with the SCIFER-2 sounding rocket, J. Geophys. Res., 117, A06326, doi:10.1029/2011JA017404, 2012.
[pdf]

P. T. Newell, and J. W. Gjerloev, SuperMAG-based partial ring current indices, J. Geophys. Res., 117, A05215, doi:10.1029/2012JA017586, 2012.
[pdf]

J. Moen, K. Oksavik, T. Abe, M. Lester, Y. Saito, T. A. Bekkeng, and K. S. Jacobsen, First in-situ measurements of HF radar echoing targets, Geophys. Res. Lett., 39, L07104, doi:10.1029/2012GL051407, 2012.
[pdf]

N. Østgaard, T. Gjesteland, R. S. Hansen, A. B. Collier, and B. Carlson, The true fluence distribution of terrestrial gamma flashes at satellite altitude, J. Geophys. Res., 117, A03327, doi:10.1029/2011JA017365, 2012.
[pdf]

T. Gjesteland, N. Østgaard, A. B. Collier, B. E. Carlson, C. Eyles, and D. M. Smith, A new method reveals more TGFs in the RHESSI data, Geophys. Res. Lett., 39, L05102, doi:10.1029/2012GL050899, 2012.
[pdf]

S. Haaland, B. Sonnerup, and G. Paschmann, More about arc-polarized structures in the solar wind, Ann. Geophys., 30, 867-883, 2012.
[pdf]

K. Snekvik, E. Tanskanen, N. Østgaard, L. Juusola, K. Laundal, E. I. Gordeev, and A. L. Borg, Changes in the magnetotail configuration before near-Earth reconnection, J. Geophys. Res., 117, A02219, doi:10.1029/2011JA017040, 2012.
[pdf]

B. E. Carlson, T. Gjesteland, and N. Østgaard, Connecting the terrestrial gamma-ray flash source strength and observed fluence distributions, J. Geophys. Res., 117, A01314, doi:10.1029/2011JA017122, 2012.
[pdf]

S. Haaland, K. Svenes, B. Lybekk, and A. Pedersen, A survey of the polar cap density based on Cluster EFW probe measurements: Solar wind and solar irradiation dependence, J. Geophys. Res., 117, A01216, doi:10.1029/2011JA017250, 2012.
[pdf]

B. Lybekk, A. Pedersen, S. Haaland, K. Svenes, A. N. Fazakerley, A. Masson, M. G. G. T. Taylor, and J.-G. Trotignon, Solar cycle variations of the Cluster spacecraft potential and its use for electron density estimations, J. Geophys. Res., 117, A01217, doi:10.1029/2011JA016969, 2012.
[pdf]

2011


P. T. Newell, J. W. Gjerloev, Substorm and Magnetosphere characteristic scales inferred from the SuperMAG auroral electrojet indices, J. Geophys. Res., Vol. 116, A12232, doi:10.1029/2011JA016936, 2011.
[pdf]

P. T. Newell, J. W. Gjerloev, Evaluation of SuperMAG Auroral Electrojet Indices as Indicators of Substorms and Auroral Power, J. Geophys. Res., Vol. 116, A12211, doi:10.1029/2011JA016779, 2011.
[pdf]

K. Oksavik, J. I. Moen, E. H. Rekaa, H. C. Carlson, M. Lester, Reversed flow events in the cusp ionosphere detected by SuperDARN HF radars, J. Geophys. Res., Vol. 116, A12303, doi:10.1029/2011JA016788, 2011.
[pdf]

Vogt, J., Haaland, S., Paschmann, G., Accuracy of multi-point boundary crossing time analysis, Ann. Geophys., 29, 2239-2252, doi:10.5194/angeo-29-2239-2011, 2011.
[pdf]

Anekallu, C. R., M. Palmroth, T. I. Pulkkinen, S. E. Haaland, E. Lucek, I. Dandouras, Energy conversion at the Earth's magnetopause using single and multispacecraft methods, J. Geophys. Res., 116, A11204, doi:10.1029/2011JA016783, 2011.
[pdf]

J. W. Gjerloev, S. Ohtani, T. Iijima, B. Anderson, J. Slavin, G. Le, Characteristics of the terrestrial field-aligned current system, Ann. Geophys., 29, 1713-1729, 2011.
[pdf]

B. E. Carlson, T. Gjesteland, N. Østgaard, Terrestrial gamma-ray flash electron beam geometry, fluence, and detection frequency. J. Geophys. Res, Vol. 116, A11217, doi:10.1029/2011JA016812, 2011.
[pdf]

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, Vol. 116, A11313, doi:10.1029/2011JA016716, 2011.
[pdf]

M. Förster, S. E. Haaland, E. Doornbos,Thermospheric vorticity at high geomagnetic latitudes from CHAMP data and its IMF dependence, Ann. Geophys., 29, 181-186, 2011.
[pdf]

E. A. Kronberg, R. Bucik, S. Haaland, B. Klecker, K. Keika, M. I. Desai, P. W. Daly, M. Yamauchi, R. Gomez-Herrero, A. T. Y. Lui, On the origin of the energetic ion events measured upstream of the Earth's bow shock by STEREO, Cluster, and Geotail, J. Geophys. Res., 116, A02210, doi:10.1029/2010JA015561, 2011.
[pdf]

W.-L. Teh, B. U. Ö. Sonnerup, G. Paschmann, S. E. Haaland, Local structure of directional discontinuities in the solar wind, J. Geophys. Res., 116, A04105, doi:10.1029/2010JA016152, 2011.
[pdf]

A. Vaivads, G. Andersson, S. D. Bale, C. M. Cully, J. De Keyser, M. Fujimoto, S. Grahn, S. Haaland, H. Ji, Yu. V. Khotyaintsev, A. Lazarian, B. Lavraud, I. R. Mann, R. Nakamura, T. K. M. Nakamura, Y. Narita, A. Retino, F. Sahraoui, A. Schekochihin, S. J. Schwartz, I. Shinohara, L. Sorriso-Valvo, EIDOSCOPE: particle acceleration at boundaries, Experimental Astronomy, pp. 1-37, doi:10.1007/s10686-011-9233-6, 2011.
[pdf]

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]

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]

L. Juusola, N. Østgaard, E. Tanskanaen, Statistics of Plasma Sheet Convection, J. Geophys. Res, Vol. 116, A08201, doi:10.1029/2011JA016479, 2011.
[pdf]

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
[pdf]

N. Østgaard, B. K. Humberset, K. M. Laundal, Evolution of auroral asymmetries in the conjugate hemispheres during two substorms, Geophys. Res. Lett., Vol. 38, No. L03101, doi:10.1029/2010GL046057
[pdf]

2010


H. Nesse Tyssøy, J. Stadsnes, M. Sørbø, C. J. Mertens, D. S. Evans, Changes in upper mesospheric and lower thermospheric temperatures caused by energetic particle precipitation, J. Geophys. Res., Vol. 115, No. A10, A10323, doi:10.1029/2010JA015427
[pdf]

B. E. Carlson, N. G. Lehtinen, U. S. Inan. Terrestrial gamma ray flash production by active lightning leader channels, J. Geophys. Res., Vol. 115, No. A10, A10324, doi:10.1029/2010JA015647
[pdf]

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
[pdf]

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. Small and Meso-scale Properties of a Substorm Onset Auroral Arc. J. Geophys. Res. Vol. 115, A10209, doi:10.1029/2010JA015537
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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]

Kronberg E. A., P.W. Daly, I. Dandouras, S. Haaland and E.Georgescu, Generation and validation of ion energy spectra based on Cluster RAPID and CIS measurements, In "The Cluster Active Archive : Studying the Earth's Plasma Environment", edited by H. Laakso, M. Taylor, and C. P. Escoubet, Springer, ISBN 978-9048134984

Haaland, S., C. Munteanu, and B. Mailyan, Solar wind propagation delay: Comment on "Minimum variance analysis-based propagation of the solar wind observations: Application to real-time global magnetohydrodynamic simulations" by A. Pulkkinen and L. Raststeatter, Space Weather: The International Journal of Research and Applications, doi:10.1029/2009SW000542 (in press)

Haaland, S., Kronberg, E. A.; Daly, P. W.; Fränz, M.; Degener, L.; Georgescu, E.; Dandouras, I. Spectral characteristics of protons in the Earth's plasmasheet: statistical results from Cluster CIS and RAPID, Annales Geophysicae, 1483-1498, Volume 28, Issue 8, 2010
[pdf]

B.U.O Sonnerup, S.E. Haaland, and G. Paschmann, On arc-polarized structures in the solar wind, Annales Geophysicae, 1229-1248, Volume 28, Issue 6, 2010
[pdf]

T. Gjesteland, N. Østgaard, R. S. Hansen, J. Stadsnes, Jordiske Gammaglimt. Fra Fysikkens Verden, Nr. 2 - 2010, 72 Årgang

Usanova, M. E., I. R. Mann, Z. C. Kale, I. J. Rae, R. D. Sydora, M. Sandanger, F. Soraas, K. H. Glassmeier, K.-H. Fornacon, H. Matsui, P. Puhl-Quinn, A. Masson, and X. Vallieres, Conjugate Ground and Multi-satellite Observations of Compression-related EMIC Pc 1 waves and Associated Proton Precipitation, J. Geophys. Res.,Vol. 115, A07208, doi:10.1029/2009JA014935
[pdf]

T. Gjesteland, N. Østgaard, P.H. Connell, J. Stadsness, G.J. Fishman Effects of dead time losses on terrestrial gamma ray flash measurements with the Burst and Transient Source Experiment, Journal of Geophysical Research, 115, doi:10.1029/2009JA014578, 2010
[pdf]

A. Blagau, B. Klecker, G. Paschmann, S. Haaland, O. Marghitu, and M. Scholer A new technique for determining orientation and motion of a 2-D, non-planar magnetopause, Ann. Geophys., 28, 753-778, 2010
[pdf]

M. B. Cohen, U. S. Inan, R. K. Said, and T. Gjesteland Solar Ystem X-rays: Geolocation of terrestrial gamma-ray flash source lightning, Geophys. Res. Lett, Vol 37, 2010.
[pdf]

2009


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. Solar Ystem X-rays: Relationship with solar X-rays and Solar Wind, Advances in Geosciences, October, Vol 15, 2009.
[pdf]

C. J. Pollock, A. Isaksson, J.-M. Jahn, F. Søraas and M. Sørbø, Remote global-scale observations of intense low-altitude ENA emissions during the Halloween geomagnetic storm of 2003, Geophysical Resarch Letters, Vol. 36, doi:10.1029/2009GL038853, 2009
[pdf]

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
[pdf]

S. Haaland, B. Lybekk, K. Svenes, A. Pedersen, M. Förster, H. Vaith, and R. Torbert, Plasma transport in the magnetotail lobes, Ann. Geophys., 27, 3577-3590, 2009
[pdf]

Kronberg E. A., P.W. Daly, I. Dandouras, S. Haaland and E.Georgescu, Generation and validation of ion energy spectra based on Cluster RAPID and CIS measurements, In "The Cluster Active Archive : Studying the Earth's Plasma Environment", edited by H. Laakso, M. Taylor, and C. P. Escoubet, Springer, ISBN 978-9048134984

M. Förster, Y. I. Feldstein, S. E. Haaland, L. A. Dremukhina, L. I. Gromova, and A. E. Levitin, Magnetospheric convection from Cluster EDI measurements compared with the ground-based ionospheric convection model IZMEM, Ann. Geophys., 27, 3077-3087, 2009
[pdf]

N. Partamies, T.I. Pulkkinen, R.L. McPherron, K. McWilliams, C.R. Bryant, E. Tanskanen, H.J. Singer, G.D. Reeves, M.F. Thomsen, Statistical survey on sawtooth events, SMCs and isolated substorms, Advances in Space Research, 44, pages 376-384, doi:10.1016/j.asr.2009.03.013
[pdf]

M.I. Sandanger, F. Søraas, M. Sørbø, K. Aarsnes, K. Oksavik, and D. Evans, Relativistic electron losses related to EMIC waves during CIR and CME storms, Journal of Atmospheric and Solar-Terrestrial Physics, 71, pages 1126-1144, doi:10.1016/j.jastp.2008.07.006
[pdf]

M. Sørbø, F. Søraas, M.I. Sandanger, and D.S. Evans, Ring current behaviour during corotating interaction region and high speed stream events, Journal of Atmospheric and Solar-Terrestrial Physics, 71, pages 1103-1125, doi:10.1016/j.jastp.2008.08.012
[pdf]

K. M. Laundal and N. Østgaard, Asymmetric auroral intensities in the Earth's Northern and Southern hemispheres.
Nature Letters, Vol. 460, doi:10.1038/nature08154, 2009.
paper from the Nature site
the cover at the Nature site
download an e-print version (limited)

N. Østgaard, K. Snekvik, A. L. Borg, A. Åsnes, A. Pedersen, M. Øieroset, T. Phan, and S. E. Haaland, Can magnetotail reconnection produce the auroral intensities observed in the conjugate ionosphere?, J. Geophys. Res., Vol. 114, No. A6, doi:10.1029/2009JA014185
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E. I. Tanskanen, A comprehensive high-throughput analysis of substorms observed by IMAGE magnetometer network: Years 1993-2003 examined, J. Geophys. Res., Vol. 114, doi:10.1029/2008JA013682
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K. Snekvik, L. Juusola, N. Østgaard and O. Amm, Reconnection Hall current system observed in the magnetotail and in the ionosphere, Geophys. Res. Lett., Vol. 36, No. 8, doi:10.1029/2009GL037239
[pdf]

2008


K. Olafsson, N. Østgaard, and E. Tanskanen, The Space Science Suitcase - Instruments for Explø Near-Earth Space from the Classroom, Earth Moon Planet, 104, page 73-75, doi: 10.1007/s11038-008-9261-z
[pdf]

Huttunen, K.E.J., Kilpua, S.P., Pulkkinen A., Tanskanen, E. Solar wind drivers of large geomagnetically induced currents during the solar cycle 23, Space Weather, Vol 6, doi:10.1029/2007SW000374
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M. Förster, S. E. Haaland, G. Paschmann, J. M. Quinn, R. B. Torbert, H. Vaith and C. A. Kletzing, High-latitude plasma convection during Northward IMF as derived from in-situ magnetospheric Cluster EDI measurements, Annales Geophysicae, vol 26, 2685-2700, 2008
[pdf]

K. Snekvik, R. Nakamura, N. Østgaard, S. Haaland, and A. Retino, The Hall current system revealed as a statistical significant pattern during fast flows, Annales Geophysicae, vol 26, No 11, 3429-3437, 2008
[pdf]

M. Sørbø, F. Søraas, M.I. Sandanger, and D.S. Evans, Ring current behaviour during Corotating Interaction Region and High Speed Stream events, JASTP, in press, doi:10.1016/j.jastp.2008.08.012, 2008
[pdf]

M.I. Sandanger, F. Søraas, M. Sørbø and D.S. Evans, Relativistic electron losses during CIR and CME storms related to EMIC waves, JASTP, in press, doi:10.1016/j.jastp.2008.07.006, 2008
[pdf]

T. Takada, R. Nakamura, L. Juusola, O. Amm, W. Baumjohann, M. Volwerk, A. Matsuoka, B. Klecker, K. Snekvik, C. J. Owen, A. N. Fazakerley, H. U. Frey, H. Réme, E. A. Lucek and C. Carr, Local field-aligned currents in the magnetotail and ionosphere as observed by a Cluster, Double Star, and MIRACLE conjunction, Journal of Geophysical Research, vol 113, A07S20, doi:10.1029/2007JA012759, 2008
[pdf]

K. R. Svenes, B. Lybekk, A. Pedersen, and S. Haaland, Cluster observations of near-Earth magnetospheric lobe plasma densities a statistical study, Ann. Geophys., 26, 2845-2852, 2008
[pdf]

B. Mailyan, C. Munteanu, and S. Haaland, What is the best method to calculate the solar wind propagation delay?, Annales Geophysicae, vol 26, 2383-2394, 2008
[pdf]

S. Haaland, G. Paschmann, M. Förster, J. Quinn, R. Torbert, H. Vaith, P. Puhl-Quinn, and C. Kletzing, Plasma convection in the magnetotail lobes: statistical results from Cluster EDI measurements, Annales Geophysicae, vol 26, 2371-2382, 2008
[pdf]

Förster, M., Rentz, S., Köhler, W., Liu, H. and Haaland, S., IMF dependence of high-latitude thermospheric wind pattern derived from CHAMP cross-track measurements, Annales Geophysicae, vol 26, 1581-1595, 2008
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Sonnerup, B. Haaland, S. and Paschmann, G.: Discontinuity Orientation, Motion and Thickness in "Multi-Spacecraft Analysis Methods Revisited", eds: G. Paschmann & P. Daly, ISSI-SR08, ISBN 987-92-9221-937-6, 2008

A. S. Sharma, R. Nakamura, A. Runov, E. E. Grigorenko, H. Hasegawa, M. Hoshino, P. Louarn, C. J. Owen, A. Petrukovich, J.-A. Sauvaud, V. S. Semenov, V. A. Sergeev, J. A. Slavin, B.U.Ö. Sonnerup, L. M. Zelenyi, G. Fruit, S. Haaland, H. Malova and K. Snekvik, Transient and localized processes in the magnetotail: a review, Annales Geophysicae, vol 26, 955-1006, 2008
[pdf]

Laundal K. M., N. Østgaard (2008), Persistent global proton aurora caused by high solar wind dynamic pressure, J. Geophys. Res., 113, A08231, doi:10.1029/2008JA013147.
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H. Nesse Tyssøy, D. Heinrich, J. Stadsnes, M. Sørbø, U.-P. Hoppe, D.S. Evans, B.P. Williams and F. Honary, Upper-mesospheric temperatures measured during intense substorms in the declining phase of the January 2005 solar Proton Events
Annales Geophysicae, Vol 26, No 9, 2008
[pdf]

Østgaard, N., T. Gjesteland, J. Stadsnes, P. H. Connell, and B. Carlson (2008), 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.
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2007


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]

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.
[pdf]

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. Submitted to J. Geophys. Res., Vol. 112, No. A6, A06215, doi: 10.1029/2006JA011913, 2007.
[pdf]

M. Förster,G. Paschmann,S. E. Haaland,J. M. Quinn, R. B. Torbert, H. Vaith,C. A. Kletzing, High-latitude plasma convection from Cluster EDI: variances and solar wind correlations, Annales Geophysicae, vol 25, No 7, p. 1691-1707, 2007
[pdf]

S. Haaland, G. Paschmann, M. Forster, J. M. Quinn, R. B. Torbert, C. E. McIlwain, H. Vaith, P. A. Puhl-Quinn, and C. A. Kletzing. "High-latitude plasma convection from Cluster EDI measurements: method and IMF-dependence", Ann. Geophys., 25, 239 - 253, 2007
[pdf]

D. Heinrich, H. Nesse Tyssøy, U. Blum, P.Acott, B. Williams, U.-P. Hoppe, Summer sudden Na number density enhancements measured with the ALOMAR Weber Na Lidar,25, 1-25,2007
[pdf]

Morley S.K., Freeman M.P., E.I. Tanskanen, A statistical comparison of observed substorm magnetic bay magnitude with that predicted by a minimal substorm model, accepted to Annales Geophysicae, 2007.

Pulkkinen, T.I., Palmroth, M., Tanskanen, E.I., Ganushkina, N.Y., Shukhtina, M.A., Dmitrieva, N.P., Solar wind -- magnetosphere coupling: A review of recent results, Journal of Atmospheric and Solar-Terrestrial Physics, Vol 69, Issue 3, 256-264, 2007.
[pdf]

Sandanger, M., F. Søraas, K. Aarsnes, K. Oksavik, and D. S. Evans, Loss of relativistic electrons: Evidence for pitch angle scattering by electromagnetic ion cyclotron waves excited by unstable ring current protons, J. Geophys. Res., doi:10.1029/2006JA012138, 2007
[pdf]

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. Accepted Annales Geophys. October 2006.
[pdf]

B.U.Ö. Sonnerup, S. Haaland, G. Paschmann, M.W. Dunlop, H. Rème, A. Balogh, Correction to ``Orientation and motion of a plasma discontinuity from single-spacecraft measurements: Generic residue analysis of Cluster data'' Journal of Geophysical Research, vol 112, No A4, 2007, doi:10.1029/2007JA012288
[pdf]

C. Sætre, C. A. Barth, J. Stadsnes, N.Østgaard, S. M. Bailey, 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:10.1029/2006JA012203, 2007.
[pdf]

H. Nesse Tyssøy, D. Heinrich, B. Williams, U.-P. Hoppe, J. Stadsnes, M. Rietveld, W. Singer, U. Blum, M. I. Sandanger and E. Trondsen, A case study of a sporadic sodium layer observed by the ALOMAR Weber Na lidar, Vol. 25, 1-11, 2007
[pdf]

N. Østgaard, S. B. Mende, H. U. Frey, J. B. Sigwarth, A. Aasnes, J. Weygand, Auroral conjugacy studies based on global imaging JASTP, special issue from Yosemite 2006, 69, 249-255, 2007.
[pdf]

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
[pdf]


2006


A. Aksnes, J. Stadsnes, N. Østgaard, G. A. Germany, K. Oksavik, R. R. Vondrak, A. Brekke, U. P. Løvhaug. 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.
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F. L. Guarnieri, B. T. Tsurutani, W. D. Gonzalez, A. L. C. Gonzalez, M. Grande, F. Soraas, E. Echer, ICME and CIR storms with particular emphases on HILDCAA events.ILWS WORKSHOP 2006, GOA, FEBRUARY 19-20, 2006.
[pdf]

S. Haaland, G. Paschmann, B.U.O. Sonnerup. Comment on "A new interpretation of Weimer et al.'s solar wind propagation delay technique" by Bargatze et al. J. Geophys. Res., Vol. 111, A06102, doi:10.1029/2005JA011376, 2006.
[pdf]

T. Neubert, I. Kuvvetli, C. Budtz-Jorgensen, N. Østgaard, V. Reglero, N. Arnold. The Atmosphere-Space Interactions Monitor (ASIM) for the International Space Station. Proceedings from the ILWS Goa Workshop. February 2006.
[pdf]

J. Nystrand, K. Brønstad, G. Eigen, F. Eisele, P. Fischer, H. Helstrup, N. Herrmann, V. Lindenstruth, R. Männer, K. Meier, N. Østgaard, D. Rohrich, 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, 2007.
[pdf]

C. Sætre, C. A. Barth, J. Stadsnes, N.Østgaard, S. M. Bailey, D. N. Baker and J. W. Gjerloev. Comparisons of electron deposition derived from observations of lower thermospheric nitric oxide and from X-ray bremsstrahlung measurements. J. Geophys. Res., Vol. 111, A04302, doi:10.1029/2005JA011391, 2006.
[pdf]

F. Søraas, M. Sørbø, K. Aarsnes and D. S. Evans, Ring current behavior inferred from ground magnetic and space observations, Geophysical Monograph Volume 167, AGU, Washington DC, 2006
[pdf]


M. Sørbø, F. Søraas, K. Aarsnes, K. Oksavik and D. S. Evans,Latitude distribution of vertically precipitating energetic neutral atoms observed at low altitudes, Geophys. Res. Lett., 33, L06108, doi:10.1029/2005GL025240
[pdf]

Bruce T. Tsurutani, Walter D. Gonzalez, Alicia L. C. Gonzalez, Fernando L. Guarnieri, Nat Gopalswamy, Manuel Grande, Yohsuke Kamide, Yoshiya Kasahara, Gang Lu, Ian Mann, Robert L. McPherron, Finn Soraas and Vytenis M. Vasyliunas. Corotating solar wind streams and recurrent geomagnetic activity: A Review. J. Geophys. Res., Vol. 111, A07S01, doi:10.1029/2005JA011273, 2006.
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2005


B. T. Tsurutani, W. D. Gonzalez, A. L. C. Gonzalez, F. L. Guarnieri, N. Gopalswamy, M. Grande, Y. Kamide, Y. Kasahara, G. Lu, I. Mann, R. McPherron, F. Soraas, V. Vasyliunas, Corotating solar wind streams and recurrent geomagnetic activity: A review, J. Geophys. Res., 111, A07S01, doi:10.1029/2005JA011273, 2006.
[pdf]

T. Asikainen, K. Mursula, R. Kerttula, R. Friedel, D. Baker, F. Søraas, J.F. Fennell and B. Blake Global View of energetic Particles During a major Magnetic Storm. The Inner Magnetosphere: Physics and Modeling, edited by Tuija I. Pulkkinen, Nikolai A. Tsyganenko, and Reiner H. W. Friedel, Geophysical Monograpgh 155, AGU, Washington DC, 2005.

A. Aksnes, O. Amm, J. Stadsnes, N. Østgaard, G. A. Germany, R. R. Vondrak, and I. Sillanpaa, Ionospheric conductances derived from satellite measurements of auroral UV and X-ray emissions, and ground-based electromagnetic data: A comparison, Annales Geophysicae 23 (2), 343-358, 2005.
[pdf]

0. Amm, A. Aksnes, J. Stadsnes, N. Østgaard, R. R. Vondrak, G. A. Germany, G. Lu, and A. Viljanen, Mesoscale ionospheric electrodynamics of omega bands determined from ground-based electronmagnetic and satellite optical observation, Annales Geophysicae 23 (2), 325-342, 2005.
[pdf]

M. Förster, S. Haaland, G.Paschmann, J.B.Baker, H.Vaith, J.M.Quinn, R.B.Torbert, Cross-Polar Magnetospheric Plasma Drift as Observedby Cluster EDI: Statistical results, In Proceedings of the Cluster and Double Star Symposium - 5th Anniversary of Cluster in Space, ESA SP 598, 2005

S. Haaland, B.U.Ö. Sonnerup, G. Paschmann, E. Georgescu, M.W.Dunlop, A. Balogh, B. Klecker, H.Réme, A.Vaivads, Discontinuity analysis with Cluster, In Proceedings of the Cluster and Double Star Symposium - 5th Anniversary of Cluster in Space, ESA SP 598, 2005

A. Kozlovsky, V. Safargaleev, N. Østgaard, T. Turunen, J. Jussila, A Roldugin, On the motion of dayside auroras caused by a solar wind pressure pulse, Ann. Geophys., 23 (2): 509-521 2005.
[pdf]

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]

M. I. Sandanger, F. Søraas, K. Aarsnes, K. Oksavik, D. S. Evans and M. S. Greer, Proton injections into the ring current associated with Bz variations during HILDCAA events. The Inner Magnetosphere: Physics and Modeling, edited by Tuija I. Pulkkinen, Nikolai A. Tsyganenko, and Reiner H. W. Friedel, Geophysical Monograpgh 155, 249-256, AGU, Washington DC, 2005.
[pdf]

B.U.Ö. Sonnerup, S. Haaland, G. Paschmann, M. W. Dunlop, H.Réme, A.Balogh, Orientation and motion of a plasma discontinuity from single-spacecraft measurements: Generic residue analysis of Cluster data J. Geophys. Res., Vol. 111, No. A5, A05203, doi:10.1029/2005JA011538
[pdf]

T. J. Stubbs , R. R. Vondrak and N. Østgaard, J. B. Sigwarth and L. A. Frank. Simultaneous observations of the auroral oval in both hemispheres under varying conditions. Geophys. Res. Lett., Vol 32, L03103, doi:10.1029/2004GL021199, 2005.
[pdf]

F. Søraas, K. Aarsnes, D. V. Carlsen, K. Oksavik and D. S. Evans, Ring current behavior as revealed by energetic proton precipitation. The Inner Magnetosphere: Physics and Modeling, edited by Tuija I. Pulkkinen, Nikolai A. Tsyganenko, and Reiner H. W. Friedel, Geophysical Monograpgh 155, 237-248, AGU, Washington DC, 2005.
[pdf]

N. Østgaard, S. B.Mende, H. U. Frey & J. B. Sigwarth, Simultaneous imaging of the reconnection spot in the opposite hemisphere during northward IMF, Geophys. Res. Lett., Vol 32, L21104, doi:10.1029/2005GL024491, 2005.
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N. Østgaard, N. A. Tsyganenko, S. B. Mende , H. U. Frey , T. J. Immel, M. Fillingim, L. A. Frank, J. B. Sigwarth, Observations and model predictions of substorm auroral asymmetries in the conjugate hemispheres, Geophys. Res. Lett., 32, 5, L05111, doi:10.1029/2004GL022166, 2005.
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N. Østgaard, J. Moen, S. B. Mende, H. U. Frey, T. J. Immel, P. Gallop, K. Oksavik, M. Fujimoto. Estimates of magnetotail reconnection rate based on IMAGE FUV and EISCAT measurements Ann. Geophys. (Eleventh International EISCAT Workshop), 23 (1), 123-134, 2005.
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A. Åsnes, J. Stadsnes, R. W. Friedel, N. Østgaard, M. Thomsen. Medium energy pitch anglke distribution during substorm injected electron cloud, Geophys. Res. Lett., Vol. 32, No. 10, L10101, doi: 10.1029/2004GL022008, 2005.
[pdf]

A. Åsnes, R. W. Friedel, J. Stadsnes, M. Thomsen, N. Østgaard, T. Cayton. Statistical pitch angle properties of substorm injected electron clouds and their relation to dawnside energetic electron precipitation, J. Geophys. Res., Vol. 110, No. A5, A05207, doi:10.1029/2004JA010838, 2005.
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2004


A. Aksnes, J. Stadsnes, G. Lu, N. Østgaard, R. R. Vondrak, D. L. Detrick, T. J. Rosenberg, G. A. Germany, and M. Schulz, Effects of energetic electrons on the electrodynamics in the ionosphere. Annales Geophysicae, 22 (2), 475-496, 2004.
[pdf]

K. Oksavik, F. Søraas, J. Moen, R. Pfaff, J. A. Davies, and M. Lester, Simultaneous optical, CUTLASS HF radar, and FAST spacecraft observations: Signatures of boundary layer processes in the cusp. Annales Geophysicae, 22 (2), 511-525, 2004.
[pdf]

C. Sætre, J. Stadsnes, H. Nesse, A. Aksnes, S. M. Petrinec, C. A. Barth, D. N. Baker, R. R. Vondrak, and N. Østgaard (2004), Energetic electron precipitation and the NO abundance in the upper atmosphere: A direct comparison during a geomagnetic storm, J. Geophys. Res., Vol. 109, NO. A9, A09302, doi:10.1029/2004JA010485, 2004.
[pdf]

F. Søraas, K. Aarsnes, K. Oksavik, M. I. Sandanger, D. S. Evans, and M. S. Greer, Evidence for particle injection as the cause of Dst reduction during HILDCAA events. Journal of Atmospheric and Solar-Terrestrial Physics, 66, 177-186, 2004.
[pdf]

Q.-G. Zong, T. A. Fritz, H. Spence, K. Oksavik, P. Daly, and A. Korth. Energetic particle sounding of the magnetopause – A contribution by CLUSTER/RAPID, J. Geophys. Res., 109, A04207, doi:10.1029/2003JA009929, 2004.
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N. Østgaard, S. B. Mende , H. U. Frey , T. J. Immel, L. A. Frank, J. B. Sigwarth, T. J. Stubbs. Interplanetary magnetic field control of the location of substorm onset and auroral features in the conjugate hemispheres. J. Geophys. Res., Vol. 109, No. A7, A07204, 10.1029/2003JA010370, 2004
[pdf]

A. Åsnes, J. Stadsnes, J. Bjordal, N. Østgaard, D. L. Detrick, T. J. Rosenberg and S. E. Håland, Pi2-pulsations observed in energetic electron precipitation and magnetic field in association with a substorm surge. Annales Geophysicae, 22 (6), 2097-2105, 2004.
[pdf]



2003


S. E. Milan, M. Lester, S. W. H. Cowley, K. Oksavik, M. Brittnacher, R. A. Greenwald, G. Sofko, J.-P. Villain, Variation in polar cap area during two substorm cycles, Ann. Geophys., 21 (5), 1121-1140, 2003.
[pdf]

F. Søraas, K. Oksavik, K. Aarsnes, D. S. Evans, and M. S. Greer, Storm time equatorial belt - an 'image' of ring current behavior, Geophysical Research Letters, 30(2) 10.1029/2002GL015636, 2003.
[pdf]

N. Ostgaard, D. L. Detrick, T. J. Rosenberg, R. R. Vondrak, H. U. Frey, S. B. Mende, S. E. Haaland, J Stadsnes, High-latitude dayside energetic precipitation and IMF BZ rotations. J. Geophys. Res., Vol. 108 (A4), 8013, doi:10.1029/2002JA009350, 2003.
[pdf]

Ubertini P, Lebrun F, Di Cocco G, Bazzano A, Bird AJ, Broenstad K, Goldwurm A, La Rosa G, Labanti C, Laurent P, Mirabel IF, Quadrini EM, Ramsey B, Reglero V, Sabau L, Sacco B, Staubert R, Vigroux L, Weisskopf MC, Zdziarski AA,IBIS: The Imager on-board INTEGRAL, ASTRONOMY & ASTROPHYSICS 411 (1): L131-L139 NOV 2003

Quadrini EM, Bazzano A, Bird AJ, Broenstad K, Di Marco F, La Rosa G, Michalska M, Orleanski P, Solberg A, Ubertini P, IBIS Veto System - Background rejection, instrument dead time and zoning performance, ASTRONOMY & ASTROPHYSICS 411 (1): L153-L157 NOV 2003



2002


A. Aksnes, J. Stadsnes, J. Bjordal, N. Østgaard, R. R. Vondrak, D. L. Detrick, T. J. Rosenberg, G. A. Germany, and D. Chenette, Instantaneous ionospheric global conductance maps during an isolated substorm. Annales Geophysicae, 20 (8), 1181-1191, 2002.
[pdf]

K. Oksavik, T. A. Fritz, Q.-G. Zong, F. Søraas, and B. Wilken. Three-dimensional energetic ion sounding of the magnetopause using Cluster/RAPID. Geophys. Res. Lett., 29, 9, doi:10.1029/2001GL014265, 2002.
[pdf]

N. Ostgaard, G. A. Germany, J Stadsnes, R. R. Vondrak, Energy analysis of substorms based on remote sensing techniques, solar wind measurements and geomagnetic indices. J. Geophys. Res., Vol. 107, NO. A9, 1233, doi: 10.1029/2001JA002002, 2002.
[pdf]

F. Søraas, K. Aarsnes, K. Oksavik, and D. S. Evans, Ring current intensity estimated from low altitude proton observations, Journal of Geophysical Research, 107(A7), doi:10.1029/2001JA000123, 2002.
[pdf]



2001


L. Lazutin, G. Starkov, C.-I. Meng, D.G. Sibeck, J. Stadsnes, J. Bjordal, Kan Liou, T. Kornilova, and G. Reeves, Westward Traveling Surge Dynamics and the Local Structure of an Isolated Substorm, Adv. Space Res., 28, 1623-1629, 2001.

J. Moen, J. A. Holtet, A. Pedersen, B. Lybekk, K. R. Svenes, K. Oksavik, W. F. Denig, E. Lucek, F. Søraas, and M. André. Cluster boundary layer measurements and optical observations at magnetically conjugate sites. Annales Geophysicae, Vol 19, page 1655 - 1668, 2001.
[pdf]

N.Ostgaard, J. Stadsnes, J. Bjordal, G. A. Germany, R. R. Vondrak, G. K. Parks, S. A Cummer, D. L. Chenette, J. G. Pronko, Auroral electron distributions derived from combined UV and X-ray emissions. J. Geophys. Res., Vol.106, 26,081 - 26,090, 2001.
[pdf]

B. Wilken, P. W. Daly, U. Mall, K. Aarsnes, D. N. Baker, R. D. Belian, J. B. Blake, H. Borg, J. Büchner, M. Carter, J. F. Fennell, R. Friedel, T. A. Fritz, F. Gliem, M. Grande, K. Kecskemety, G. Kettmann, A. Korth, S. Livi, S. McKenna-Lawlor, K. Mursula, B. Nikutowski, C. H. Perry, Z. Y. Pu, J. Roeder, G. D. Reeves, E. T. Sarris, I. Sandahl, F. Søraas, J. Woch, and Q.-G. Zong. First results from the RAPID imaging energetic particle spectrometer on board Cluster. Annales Geophysicae, Vol 19, page 1355 – 1366, 2001.
[pdf]

2000


J. Bjordal, L. P. Borovkov, I. A. Kornilov, T. A. Kornilova, L. L. Lazutin, N. Østgaard, J. Stadsnes, G. V. Starkov, E. Thorsen, S. A. Chernous, Structure of polar aurora over Kola Peninsula and of X-Ray oval measured by PIXIE/POLAR on February 9, 1997, Geomagnetism and Aeronomy, 40, 307-315, 2000.

S.A. Cummer, R.R. Vondrak, N. Østgaard, J. Stadsnes, J. Bjordal, D.L. Chenette, M.J. Brittnacher, G.K. Parks, J.B. Sigwarth, L.A. Frank, Global Multispectral Auroral Imaging of an Isolated Substorm, Geophys.Res.Lett., 27, 637-640, 2000.
[pdf]

Lazutin LL, Borovkov LP, Kozelova TV, Kornilov IA, Tagirov VR, Korth A, Stadsnes J, Ullaland S, Investigation of the conjugacy between auroral breakup and energetic electron injection JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 105 (A8): 18495-18503 AUG 1 2000
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Maynard, N. C., W. J. Burke, R. F. Pfaff, E. Weber, D. D. Ober, D. R. Weimer, J. Moen, S. Milan, K. Måseide, P. E. Sandholt, A. Egeland, F. Søraas, R. Lepping, S. Bounds, M. H. Acuna, H. Freudenreich, L. C. Gentile, D. A. Hardy, J. A. Holtet, M. Lester, J. S. Machuzak, P. Ning, J. Stadsnes, and T. van Eyken, Driving dayside convection with northward IMF: observations of a sounding rocket from Svalbard, J. Geophys. Res., 105, 5245, 2000.

Oksavik, K., F. Søraas, J. Moen, and W.J. Burke, Optical and particle signatures of magnetospheric boundary layers near magnetic noon: Satellite and ground-based observations, J. Geophys. Res., 105, 27555, 2000.
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N. Ostgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A Cummer, D. L. Chenette, M. Schulz and J. G. Pronko, Cause of the localized maximum of X-ray emission in the morning sector: A comparison with electron measurements. J. Geophys. Res., Vol. 105, No A9, p. 20,869 - 20,885, 2000.
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N. Ostgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A Cummer, D. L. Chenette, M. Schulz, G. K. Parks, M. J. Brittnacher, D. L. McKenzie and J. G. Pronko, Global X-ray emission during an isolated substorm - A case study. J. Atmos. Solar-Terr. Phys., Vol. 62 (10), p. 889 - 900, 2000.
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1999


Håland S., F. Søraas and S.L. Ullaland Propagation Velocities and Dimensions of Flux Rope Formation in the Near-Earth Magnetotail, Geophysical Research Letter, Vol. 26, No. 21, 1999.
[pdf]

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 and M. J. Brittnacher, Magnetospheric and Ionospheric Response to a Substorm: Geotail HEP-LD and Polar PIXIE Observations, J. Geophys. Res., Vol. 104, No. A12, p. 28,459. 1999.
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N. Østgaard, J. Bjordal, J. Stadsnes, and 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, 1999.
[pdf]

N. Ostgaard, J. Stadsnes, J. Bjordal, R. R. Vondrak, S. A Cummer, D. L. Chenette, G. K. Parks, M. J. Brittnacher and D. L. McKenzie, Global Scale Electron Precipitation Features seen in UV and X-rays During Substorms. J. Geophys. Res., Vol. 104, p. 10,191 - 10,204, 1999.
[pdf]

Søraas, F., K. Aarsnes, J.Å. Lundblad and D.S. Evans, Enhanced pitch angle scattering of protons at mid-latitudes during geomagnetic storms, Phys.Chem. Earth (C) 24,1-3, 287-292,1999.
[pdf]

Ubertini P, Lebrun F, Di Cocco G, Bazzano A, Bird AJ, Broenstad K, Caroli E, Denis M, Goldwurm A, Labanti C, Laurent P, Mirabel IF, Natalucci L, Quadrini EM, Reglero V, Sabau L, Sacco B, Staubert R, Vigroux L, Weisskopf MC, Zdziarski A, Zehnder A, Bassani L, The gamma-ray imager on board INTEGRAL, ASTROPHYSICAL LETTERS & COMMUNICATIONS 39 (1-6): 799-+ 1999



1998


Lockwood M., S. Fuselier, A.D.M. Walker and F. Søraas, " A summary of NATO ASI on polar cap boundary phenomena." Polar Cap Boundary Phenomena, NATO Advanced Study Institute Series, Kluwer Academic Press, Dordrecht, Vol 509, 1998.

N. Østgaard, J. Stadsnes, K. Aarsnes, F. Søraas, Simultaneous measurements of X-rays and electrons during a pulsating aurora, Annales Geophysicae, 16, 148-160, 1998.
[pdf]

N. Østgaard, J. Stadsnes, J. Bjordal, E. Thorsen, R. R. Vondrak, S. A. Cummer, D. L. Chenette, G. K. Parks, M. J. Brittnacher, and D. L. McKenzie, Global Scale Electron Precipitation During Substorm Expansions, In SUBSTORMS-4, Eds. S. Kokubun and Y. Kamide, 55-58, 1998.

Synnes, S.A., F. Søraas and J.P. Hansen, Monte-Carlo simulations of proton aurora, J. Atmos. Terr. Phys., 60, 1695-1705, 1998.
[pdf]

Wilken B, Zong QG, Doke T, Mukai T, Yamamoto T, Reeves GD, Maezawa K, Kokubun S, Ullaland S, Substorm activity on January 11, 1994: Geotail observations in the distant tail during the leading phase of a corotating interaction region, J. Geophys. Res. Vol. 103 , No. A8 , p. 17,671 (98JA00673)
[pdf]

Zong QG, Wilken B, Woch J, Mukai T, Yamamoto T, Reeves GD, Doke T, Maezawa K, Williams DJ, Kokubun S, Ullaland S, Energetic oxygen ion bursts in the distant magnetotail as a product of intense substorms: Three case studies J. Geophys. Res. Vol. 103 , No. A9 , p. 20,339 (97JA01146), 1998
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1997


J. Bjordal, M. Brittnacher, D.L. Chenette, D.L. McKenzie, G.K. Parks, J. Stadsnes, E. Thorsen, and N. Østgaard, X-ray and Optical Imaging From the POLAR Satellite, Proceedings, The 24th Annual European Meeting on Atmospheric Studies By Optical Methods, Andenes, 18-22 August, 1997, p. 96-107, ISBN 82-994583-0-7.

J. Stadsnes, K. Aarsnes and J. Bjordal, X-ray Imaging of the Aurora, Advances in Space Research, 20, 1043-1054, 1997.
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Wilken B, Axford WI, Daglis I, Daly P, Guttler W, Ip WH, Korth A, Kremser G, Livi S, Vasyliunas VM, Woch J, Baker D, Belian RD, Blake JB, Fennell JF, Lyons LR, Borg H, Fritz TA, Gliem F, Rathje R, Grande M, Hall D, Kecsuemety K, McKennaLawlor S, Mursula K, Tanskanen P, Pu Z, Sandahl I, Sarris ET, Scholer M, Schulz M, Soraas F, Ullaland S, RAPID - The imaging energetic particle spectrometer on Cluster, SPACE SCIENCE REVIEWS 79 (1-2): 399-473 JAN 1997

Wilken B, Daglis IA, Milillo A, Orsini S, Doke T, Livi S, Ullaland S, Energetic neutral atoms in the outer magnetosphere: An upper flux limit obtained with the HEP-LD spectrometer on board GEOTAIL, Geophys. Res. Lett. Vol. 24 , No. 2 , p. 111 (96GL03659)
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Zong QG, Wilken B, Reeves GD, Daglis IA, Doke T, Iyemori T, Livi S, Maezawa K, Mukai T, Kokubun S, Pu ZY, Ullaland S, Woch J, Lepping R, Yamamoto T, Geotail observations of energetic ion species and magnetic field in plasmoid-like structures in the course of an isolated substorm event, J. Geophys. Res. Vol. 102 , No. 6 , p. 11,409 (97JA00076 )
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1996


I. A. Daglis, W. I. Axford, S. Livi, B. Wilken, M. Grande, F. Soraas, Auroral ionospheric ion feeding of the inner plasma sheet during substorms, JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 48 (5-6): 729-739 1996

F. Soraas , K. Aarsnes Observations of ENA in and near a proton arc GEOPHYSICAL RESEARCH LETTERS 23 (21), 1996
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Truman A, Palmer MJ, Durrant PT, Bird AJ, Ramsden D, Stadsnes J, A PSPMT based auroral X-ray imager NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 368 (2): 492-497 JAN 1 1996
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1995


W. L. Imhof, K. A. Spear, J. W. Hamilton, B. R. Higgins, M. J. Murphy, J. G. Pronko, R. R. Vondrak, D. L. McKenzie, C. J. Rice, D. J. Gorney, D. A. Roux, R. L. Williams, J. A. Stein, J. Bjordal, J. Stadsnes, K. Njøten, T. J. Rosenberg, L. Lutz, and D. Detric, The Polar Ionospheric X-ray Imaging Experiment, Space Science Reviews, 71,Nos. 1-4, 1995.

Wilken, B. ; Zong, Q. G. ; Daglis, I. A. ; Doke, T. ; Livi, S. ; Maezawa, K. ; Pu, Z. Y. ; Ullaland, S. ; Yamamoto, T. 1995 Tailward flowing energetic oxygen ion bursts associated with multiple flux ropes in the distant magnetotail: GEOTAIL observations Geophys. Res. Lett. Vol. 22 , No. 23 , p. 3267-3270 (95GL02980)



1994


F. Søraas, K. Måseide, P. Torheim and K. Aarsnes, Doppler-shifted auroral H emission: a comparison between observations and calculations, Annales Geophysicae, 12(10-11), 1994



1993


ULLALAND S, KREMSER G, TANSKANEN P, KORTH A, ROUX A, TORKAR K, BLOCK LP, IVERSEN IB, ON THE DEVELOPMENT OF A MAGNETOSPHERIC SUBSTORM INFLUENCED BY A STORM SUDDEN COMMENCEMENT - GROUND, BALLOON, AND SATELLITE-OBSERVATIONS, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 98 (A9): 15381-15401 SEP 1 1993



1992


DOKE T, FUJII M, FUJIMOTO M, FUJIKI K, FUKUI T, GLIEM F, GUTTLER W, HASEBE N, HAYASHI T, ITO T, ITSUMI K, KASHIWAGI T, KIKUCHI J, KOHNO T, KOKUBUN S, LIVI S, MAEZAWA K, MORIYA H, MUNAKATA K, MURAKAMI H, MURAKI Y, NAGOSHI H, NAKAMOTO A, NAGATA K, NISHIDA A, RATHJE R, SHINO T, SOMMER H, TAKASHIMA T, TERASAWA T, ULLALAND S, WEISS W, WILKEN B, YAMAMOTO T, YANAGIMACHI T, YANAGITA S, THE ENERGETIC PARTICLE SPECTROMETER HEP ONBOARD THE GEOTAIL SPACECRAFT, JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 46 (8): 713-733 1994

B. Wilken, W. Weiss, D. Hall, M. Grande, F. Soraas, J. F. Fennell, Magnetospheric ion composition spectrometer onboard the crres spacecraft, Journal of spacecraft and rockets, 29(4), 1992



1991


G. A. Johansen, J. Stadsnes, F. Soraas, T. E. Hansen, Detection of 10-20 keV H+ ions and electrons by planar oxide passivated and ion-implanted silicon diodes, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 62 (1), NOV 1991

RASINKANGAS R, KREMSER G, WILKEN B, SORAAS F, SUBSTORM RELATED ENERGY-LATITUDE DISPERSION OF ENERGETIC IONS IN THE DAYSIDE MAGNETOSPHERE - VIKING OBSERVATIONS, ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES 9 (9): 628-639 SEP 1991

SHAHIDI F, WOOLLISCROFT LJC, STADSNES J INTERACTIVE IMAGING AND REAL-TIME POINTING IN AN AURORAL IMAGING OBSERVATORY ESA JOURNAL-EUROPEAN SPACE AGENCY 15 (2): 141-148 1991



1990


PELLINENWANNBERG A, SANDAHL I, WANNBERG G, OPGENOORTH H, SORAAS F, MURPHREE JS, EISCAT OBSERVATIONS ON PLASMA DRIFTS CONNECTED WITH THE AURELD-VIP ROCKET AND THE VIKING SATELLITE, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 95 (A5): 6073-& MAY 1 1990



1989


OLAFSSON K, ULLALAND S ON THE RELATIONSHIP BETWEEN COSMIC NOISE ABSORPTION AND AURORAL X-RAYS - A CASE-STUDY JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 51 (3): 213-222 MAR 1989



1988




1987


STUDEMANN W, WILKEN B, KREMSER G, KORTH A, FENNELL JF, BLAKE B, KOGA R, HALL D, BRYANT D, SORAAS F, BRONSTAD K, FRITZ TA, LUNDIN R, GLOECKLER G THE MAY 2-3, 1986 MAGNETIC STORM - 1ST ENERGETIC ION COMPOSITION OBSERVATIONS WITH THE MICS INSTRUMENT ON VIKING GEOPHYSICAL RESEARCH LETTERS 14 (4): 455-458 APR 1987

TORKAR KM, RIEDLER W, KREMSER G, KORTH A, ULLALAND S, STADSNES J, BLOCK LP, IVERSEN IB, TANSKANEN P, KANGAS J, CORNILLEAUWEHRLIN N, SOLOMON J, A STUDY OF THE INTERACTION OF VLF WAVES WITH EQUATORIAL ELECTRONS AND ITS RELATIONSHIP TO AURORAL X-RAYS IN THE MORNING SECTOR, PLANETARY AND SPACE SCIENCE 35 (10): 1231-1253 OCT 1987

TANSKANEN P, KANGAS J, BLOCK L, KREMSER G, KORTH A, WOCH J, IVERSEN IB, TORKAR KM, RIEDLER W, ULLALAND S, STADNES J, GLASSMEIER KH, DIFFERENT PHASES OF A MAGNETOSPHERIC SUBSTORM ON JUNE 23, 1979, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 92 (A7): 7443-7457 JUL 1 1987



1986


KREMSER G, KORTH A, ULLALAND S, STADSNES J, BAUMJOHANN W, BLOCK L, TORKAR KM, RIEDLER W, APARICIO B, TANSKANEN P, IVERSEN IB, CORNILLEAUWEHRLIN N, SOLOMON J, AMATA E, KREMSER G, KORTH A, ULLALAND S, et al. ENERGETIC ELECTRON-PRECIPITATION DURING A MAGNETOSPHERIC SUBSTORM AND ITS RELATIONSHIP TO WAVE PARTICLE INTERACTION JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 91 (A5): 5711-5718 MAY 1 1986



1985


IVERSEN IB, BLOCK LP, BRONSTAD K, GRARD R, HAERENDEL G, JUNGINGER H, KORTH A, KREMSER G, MADSEN M, NISKANEN J, RIEDLER W, TANSKANEN P, TORKAR KM, ULLALAND S, SIMULTANEOUS OBSERVATIONS OF A PULSATION EVENT FROM THE GROUND, WITH BALLOONS AND WITH A GEOSTATIONARY SATELLITE ON AUGUST 12, 1978, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 89 (NA8): 6775-6785 1984

TORKAR KM, URBAN A, BJORDAL J, LUNDBLAD JA, SORAAS F, SMITH LG, DUMBS A, GRANDAL B, ULWICK JC, VANCOUR RP, ENERGY DEPOSITION RATES BY CHARGED-PARTICLES, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 47 (1-3): 61-71 1985

YAMAGISHI H, ONO T, FUKUNISHI H, YAMAGAMI T, NISHIMURA J, KODAMA M, HIRASIMA Y, MURAKAMI H, HOLTET JA, ULLALAND S, PELLINEN RJ, PULSATING PHENOMENA OF AURORAL-ZONE X-RAYS ASSOCIATED WITH QUASI-PERIODIC VLF EMISSIONS AND PC-3 MAGNETIC PULSATIONS, JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY 37 (10): 927-943 1985



1984


ASHEIM S, AARSNES K, OPTICAL AND MAGNETIC PULSATIONS, PLANETARY AND SPACE SCIENCE 32 (6): 735-744 1984

GOLDBERG RA, JACKMAN CH, BARCUS JR, SORAAS F, NIGHTTIME AURORAL ENERGY DEPOSITION IN THE MIDDLE ATMOSPHERE, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 89 (NA7): 5581-5596 1984



1983


SERGEEV VA, SAZHINA EM, TSYGANENKO NA, LUNDBLAD JA, SORAAS F, PITCH-ANGLE SCATTERING OF ENERGETIC PROTONS IN THE MAGNETOTAIL CURRENT SHEET AS THE DOMINANT SOURCE OF THEIR ISOTROPIC PRECIPITATION INTO THE NIGHTSIDE IONOSPHERE PLANETARY AND SPACE SCIENCE 31 (10): 1147-1155 1983



1982


IMHOF WL, STADSNES J, REAGAN JB, KILNER JR, GAINES EE, DATLOWE DW, MOBILIA J, NAKANO GH, SATELLITE BREMSSTRAHLUNG X-RAY MEASUREMENTS AT THE ONSET OF A MAGNETOSPHERIC SUBSTORM JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 87 (NA10): 8149-8156 1982

IMHOF WL, STADSNES J, KILNER JR, DATLOWE DW, NAKANO GH, REAGAN JB, STAUNING P, IMHOF WL, STADSNES J, KILNER JR, et al. MAPPINGS OF ENERGETIC ELECTRON-PRECIPITATION FOLLOWING SUBSTORMS USING THE SATELLITE BREMSSTRAHLUNG TECHNIQUE JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 87 (NA2): 671-680 1982

KREMSER G, BJORDAL J, BLOCK LP, BRONSTAD K, HAVAG M, IVERSEN IB, KANGAS J, KORTH A, MADSEN MM, NISKANEN J, RIEDLER W, STADSNES J, TANSKANEN P, TORKAR KM, ULLALAND SL, KREMSER G, BJORDAL J, BLOCK LP, et al. COORDINATED BALLOON-SATELLITE OBSERVATIONS OF ENERGETIC PARTICLES AT THE ONSET OF A MAGNETOSPHERIC SUBSTORM JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 87 (NA6): 4445-4453 1982



1981




1980


MAEHLUM BN, MASEIDE K, AARSNES K, EGELAND A, GRANDAL B, HOLTET J, JACOBSEN TA, MAYNARD NC, SORAAS F, STADSNES J, THRANE EV, TROIM J, MAEHLUM BN, MASEIDE K, AARSNES K, et al. POLAR-5 - AN ELECTRON-ACCELERATOR EXPERIMENT WITHIN AN AURORA .1. INSTRUMENTATION AND GEOPHYSICAL CONDITIONS PLANETARY AND SPACE SCIENCE 28 (3): 259-278 1980

SORAAS F, GUSTAFSSON G, BORG H FIELD LINE TOPOLOGY IN THE DAYSIDE CUSP REGION INFERRED FROM LOW ALTITUDE PARTICLE OBSERVATIONS PLANETARY AND SPACE SCIENCE 28 (5): 525-533 1980

SORAAS F, LUNDBLAD JA, MALTSEVA NF, TROITSKAYA V, SELIVANOV V, A COMPARISON BETWEEN SIMULTANEOUS IPDP GROUND-BASED OBSERVATIONS AND OBSERVATIONS OF ENERGETIC PROTONS OBTAINED BY SATELLITES PLANETARY AND SPACE SCIENCE 28 (4): 387-405 1980



1979


ARTHUR CW, BJORDAL J, ROSENBERG TJ, PC3 MAGNETIC PULSATIONS AND PRECIPITATION OF ENERGETIC ELECTRONS JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 84 (NA8): 4125-4133 1979

LUNDBLAD JA, SORAAS F, AARSNES K, SUBSTORM MORPHOLOGY OF GREATER-THAN 100 KEV PROTONS, PLANETARY AND SPACE SCIENCE 27 (6): 841-865 1979

TREFALL H, WILLIAMS DJ, TIME STRUCTURE OF POST-MIDNIGHT ENERGETIC ELECTRON-PRECIPITATION AND THE LIMIT OF STABLE TRAPPING, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 84 (NA6): 2725-2735 1979



1978


LUNDBLAD JA, SORAAS F, PROTON OBSERVATIONS SUPPORTING ION-CYCLOTRON WAVE HEATING THEORY OF SAR ARC FORMATION, PLANETARY AND SPACE SCIENCE 26 (3): 245-254 1978
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PYTTE T, LUNDLBAD JA, SORAAS F, HONES EW, WEST H, 3-SATELLITE MEASUREMENTS AND FIELD-LINE MAPPING OF OUTER PLASMA SHEET BOUNDARY FROM R - 1.2 TO - 18 RE DURING SUBSTORMS,GEOPHYSICAL RESEARCH LETTERS 5 (7): 585-588 1978



1977


SORAAS F, LUNDBLAD JA, HULTQVIST B, ENERGY-DEPENDENCE OF RING CURRENT PROTON PRECIPITATION, PLANETARY AND SPACE SCIENCE 25 (8): 757-763 1977



1976


PYTTE T, TREFALL H, KREMSER G, JALONEN L, RIEDLER W, MORPHOLOGY OF ENERGETIC (GREATER THAN OR EQUAL TO 30 KEV) ELECTRON-PRECIPITATION DURING GROWTH PHASE OF MAGNETOSPHERIC SUBSTORMS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 38 (7): 739-755 1976

WILLIAMS DJ, TREFALL H, FIELD-ALIGNED PRECIPITATION OF GREATER-THAN 30-KEV ELECTRONS, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 81 (16): 2927-2930 1976



1975


AMUNDSEN R, SORAAS F, AARSNES K, CLEFT SIGNATURE IN PROTON FLUXES ABOVE 100 KEV, JOURNAL OF GEOPHYSICAL RESEARCH 80 (4): 685-689 1975

HAUGE R, SORAAS F, PRECIPITATION OF GREATER-THAN 115 KEV PROTONS IN EVENING AND FORE-NOON SECTORS IN RELATION TO MAGNETIC ACTIVITY, PLANETARY AND SPACE SCIENCE 23 (8): 1141-1154 1975

KANGAS J, LUKKARI L, TANSKANEN P, TREFALL H, STADSNES J, KREMSER G, RIEDLER W, MORPHOLOGY OF AURORAL-ZONE X-RAY EVENTS .4. SUBSTORM-RELATED ELECTRON PRECIPITATION IN LOCAL MORNING SECTOR, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 37 (10): 1289-1303 1975

TREFALL H, ULLALAND S, STADSNES J, SINGSTAD I, PYTTE T, BRONSTAD K, BJORDAL J, KARAS RH, BROWN RR, MUNCH J, MORPHOLOGY AND FINE TIME STRUCTURE OF AN EARLY MORNING ELECTRON PRECIPITATION EVENT, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 37 (1): 83-105 1975



1974


KANGAS J, TANSKANE.P, TREFALL H, STADSNES J, KREMSER G, RIEDLER W, ENERGY SPECTRAL VARIATIONS DURING SVA PRECIPITATION EVENTS ON MORNING AND DAY SIDE OF AURORAL ZONE, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 36 (7): 1269-1275 1974

PYTTE T, BJORDAL J, BRONSTAD K, SINGSTAD I, STADSNES J, TREFALL H, ULLALAND S, BROWN RR, KARAS RH, LARGE-SCALE AURORAL-ZONE ELECTRON PRECIPITATION EVENT, BRIEFLY INTERRUPTED DURING A NEGATIVE MAGNETIC IMPULSE, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 36 (1): 29-42 1974

SORAAS F, BERG LE, CORRELATED SATELLITE MEASUREMENTS OF PROTON PRECIPITATION AND PLASMA-DENSITY, JOURNAL OF GEOPHYSICAL RESEARCH 79 (34): 5171-5180 1974

SORAAS F, LINDALEN HR, MASEIDE K, EGELAND A, STEN TA, EVANS DS, PROTON PRECIPITATION AND H-BETA EMISSION IN A POSTBREAKUP AURORAL GLOW, JOURNAL OF GEOPHYSICAL RESEARCH 79 (13): 1851-1859 1974



1973


BARCUS JR, BROWN RR, KARAS RH, BRONSTAD K, TREFALL H, KODAMA M, ROSENBER.TJ, BALLOON OBSERVATIONS OF AURORAL-ZONE X-RAYS IN CONJUGATE REGIONS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (3): 497-511 1973

DEEHR CS, EGELAND A, AARSNES K, AMUNDSEN R, LINDALEN HR, SORAAS F, DALZIEL R, SMITH PA, THOMAS GR, STAUNING P, BORG H, GUSTAFSS.G, HOLMGREN LA, RIEDLER W, RAITT J, SKOVLI G, WEDDE T, JAESCHKE R, PARTICLE AND AURORAL OBSERVATIONS FROM ESRO I-AURORAE SATELLITE JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (11): 1979-2011 1973

KREMSER G, WILHELM K, RIEDLER W, BRONSTAD K, TREFALL H, ULLALAND SL, LEGRAND JP, KANGAS J, TANSKANE.P, MORPHOLOGY OF AURORAL-ZONE X-RAY EVENTS .2. EVENTS DURING EARLY MORNING HOURS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (4): 713-733 1973

MARAL G, BRONSTAD K, TREFALL H, KREMSER G, SPECHT H, TANSKANE.P, KANGAS J, RIEDLER W, LEGRAND JP, MORPHOLOGY OF AURORAL-ZONE X-RAY EVENTS .3. LARGE-SCALE OBSERVATIONS IN MIDNIGHT-TO-MORNING SECTOR, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (4): 735-751 1973

SORENSEN T, BJORDAL J, TREFALL H, et al., CORRELATION BETWEEN PULSATIONS IN AURORAL LUMINOSITY VARIATIONS AND X-RAYS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (5): 961-969 1973

WEDDE T, SKOVLI G, AMUNDSEN R, AARSNES K, LINDALEN HR, SORAAS F, HIGH LATITUDE ELECTRON AND PROTON PRECIPITATION AT DIFFERENT LOCAL TIMES AND MAGNETIC ACTIVITY, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 35 (12): 2191-2203 1973



1972


AARSNES K, AMUNDSEN R, NORTH/SOUTH ASYMMETRIC ENTRY OF SOLAR PROTONS DURING NOVEMBER 18, 1968 EVENT, PLANETARY AND SPACE SCIENCE 20 (2): 1835& 1972

AMUNDSEN R, AARSNES K, LINDALEN HR, SORAAS F, PITCH-ANGLE DISTRIBUTIONS OF 100-KEV TO 300-KEV PROTONS MEASURED BY ESRO IB SATELLITE, JOURNAL OF GEOPHYSICAL RESEARCH 77 (4): 556& 1972

BARCUS JR, BROWN RR, BRONSTAD K, TREFALL H, ROSENBER.TJ, KODAMA M, KARAS RH, AURORAL X-RAY AND CONJUGATE IONOSPHERIC ABSORPTION OBSERVATIONS OF AN ELECTRON PRECIPITATION EVENT ACCOMPANYING A SUDDEN IMPULSE IN GEOMAGNETIC-FIELD, JOURNAL OF GEOPHYSICAL RESEARCH 77 (31): 6294-& 1972

BERG LE, SORAAS F, OBSERVATIONS SUGGESTING WEAK PITCH ANGLE DIFFUSION OF PROTONS, JOURNAL OF GEOPHYSICAL RESEARCH 77 (34): 6708& 1972



1971


BJORDAL J, TREFALL H, ULLALAND S, BEWERSDO.A, KANGAS J, TANSKANE.P, KREMSER G, SAEGER KH, SPECHT H, MORPHOLOGY OF AURORAL-ZONE X-RAY EVENTS .1. DYNAMICS OF MIDNIGHT EVENTS JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 33 (4): 605& 1971

LINDALEN HR, SORAAS F, AARSNES K, AMUNDSEN R, VARIATIONS IN HIGH LATITUDE PROTON TRAPPING BOUNDARY ASSOCIATED WITH POLAR MAGNETIC SUBSTORMS, PLANETARY AND SPACE SCIENCE 19 (9): 1041& 1971

ROSENBER.TJ, BJORDAL J, TREFALL H, KVIFTE GJ, OMHOLT A, EGELAND A, CORRELATION STUDY OF AURORAL LUMINOSITY AND X-RAYS, JOURNAL OF GEOPHYSICAL RESEARCH 76 (1): 122& 1971

SLETTEN A, STADSNES J, TREFALL H, AURORAL-ZONE X-RAY EVENTS AND THEIR RELATION TO POLAR MAGNETIC SUBSTORMS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 33 (4): 589& 1971



1970


AARSNES K, AMUNDSEN R, LINDALEN HR, SORAAS F, PROTON PRECIPITATION IN NOON-MIDNIGHT MERIDIAN AND ITS RELATION TO GEOMAGNETIC ACTIVITY, PHYSICA NORVEGICA 4 (2): 73& 1970

BRYANT DA, COURTIER GM, SKOVLI G, LINDALEN HR, AARSNES K, MASEIDE K, ELECTRON DENSITY AND ELECTRON FLUX IN A GLOW AURORA, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 32 (10): 1695-& 1970

TREFALL H, PYTTE T, BRONSTAD K, BJORDAL J, SINGSTAD I, SORHAUG A, MORPHOLOGY AND DYNAMICS OF AURORAL-ZONE ELECTRON PRECIPITATION FROM BALLOON MEASUREMENTS OF BREMSSTRAHLUNG PHYSICA NORVEGICA 4 (2): 161& 1970



1969




1968


BEWERSDO.A, KREMSER G, STADSNES J, TREFALL H, ULLALAND S, SIMULTANEOUS BALLOON MEASUREMENTS OF AURORAL X-RAYS DURING SLOWLY VARYING IONOSPHERIC ABSORPTION EVENTS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 30 (4): 591& 1968

BRONSTAD K, TREFALL H, EAST-WEST MOVEMENTS OF PULSATING AURORAL-ZONE X-RAY EVENTS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 30 (2): 205& 1968

PETTERSE.H, KVIFTE GJ, BJORDAL J, EFFECT OF A VELOCITY DISPERSION OF PRIMARY PARTICLES ON AURORAL LIGHT AND X-RAY PULSATIONS, ANNALES DE GEOPHYSIQUE 24 (2): 541& 1968

Soraas F., L. R. Davis, Temporal variations of the 100 keV to 1700 keV trapped protons observed on satellites explorer 26 during first half of 1965, Goddard space flight center, Greenbelt, Maryland
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1967


ROSENBER.TJ, BJORDAL J, KVIFTE GJ, ON COHERENCY OF X-RAY AND OPTICAL PULSATIONS IN AURORAS, JOURNAL OF GEOPHYSICAL RESEARCH 72 (13): 3504& 1967

MAEHLUM B, STADSNES J, SCATTERING AND ABSORPTION OF FAST ELECTRONS IN UPPER ATMOSPHERE, PHYSICA NORVEGICA 2 (2): 111& 1967

1966


SORAAS F, TRUMPY B ROCKET MEASUREMENT OF PROTON ENERGY SPECTRA AND PITCH ANGLE DISTRIBUTION IN AURORAL ZONE JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 28 (11): 1081& 1966

TREFALL H, BJORDAL J, ULLALAND SL, STADSNES J, ON EXTENSION OF AURORAL-ZONE X-RAY MICROBURSTS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS 28 (2): 225& 1966


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