Zobrazeno 1 - 10
of 109
pro vyhledávání: '"F. Sigernes"'
Autor:
J. A. Carter, M. Dunlop, C. Forsyth, K. Oksavik, E. Donovon, A. Kavanagh, S. E. Milan, T. Sergienko, R. C. Fear, D. G. Sibeck, M. Connors, T. Yeoman, X. Tan, M. G. G. T. Taylor, K. McWilliams, J. Gjerloev, R. Barnes, D. D. Billet, G. Chisham, A. Dimmock, M. P. Freeman, D.-S. Han, M. D. Hartinger, S.-Y. W. Hsieh, Z.-J. Hu, M. K. James, L. Juusola, K. Kauristie, E. A. Kronberg, M. Lester, J. Manuel, J. Matzka, I. McCrea, Y. Miyoshi, J. Rae, L. Ren, F. Sigernes, E. Spanswick, K. Sterne, A. Steuwer, T. Sun, M.-T. Walach, B. Walsh, C. Wang, J. Weygand, J. Wild, J. Yan, J. Zhang, Q.-H. Zhang
Publikováno v:
Earth and Planetary Physics, Vol 8, Iss 1, Pp 275-298 (2024)
The joint European Space Agency and Chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,
Externí odkaz:
https://doaj.org/article/29ec98756c3e4a33a1af2dd02c80e1c1
Autor:
G. J. Fasel, L. C. Lee, E. Lake, D. Csonge, B. Yonano, O. Bradley, J. Briggs, S. H. Lee, J. Mann, F. Sigernes, D. Lorentzen
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2024)
In 1961, Dungey suggested that magnetic reconnection occurs due to the solar-terrestrial interaction. The interplanetary magnetic field (IMF) is thought to merge with Earth’s geomagnetic field (GMF). After the reconnection process the newly formed
Externí odkaz:
https://doaj.org/article/bea3f4ecda304704a3f721f688454403
Publikováno v:
Annales Geophysicae, Vol 39, Pp 849-859 (2021)
We present measurements of sunlit aurora during the launch of the Rocket Experiment for Neutral Upwelling 2 (RENU2) on the 13 December 2015, 07:34 UTC. The in situ auroral conditions coincide with those of sunlit aurora and were characterised by the
Externí odkaz:
https://doaj.org/article/d3179ef78b094ab984ab721b251ce7a4
Autor:
F. Sigernes, S. E. Holmen, D. Biles, H. Bjørklund, X. Chen, M. Dyrland, D. A. Lorentzen, L. Baddeley, T. Trondsen, U. Brändström, E. Trondsen, B. Lybekk, J. Moen, S. Chernouss, C. S. Deehr
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 3, Iss 2, Pp 241-245 (2014)
A two-step procedure to calibrate the spectral sensitivity to visible light of auroral all-sky cameras is outlined. Center pixel response is obtained by the use of a Lambertian surface and a standard 45 W tungsten lamp. Screen brightness is regulated
Externí odkaz:
https://doaj.org/article/566158b5dca54db49877cea35807a9e8
Autor:
B. U. E. Brändström, C.-F. Enell, O. Widell, T. Hansson, D. Whiter, S. Mäkinen, D. Mikhaylova, K. Axelsson, F. Sigernes, N. Gulbrandsen, N. M. Schlatter, A. G. Gjendem, L. Cai, J. P. Reistad, M. Daae, T. D. Demissie, Y. L. Andalsvik, O. Roberts, S. Poluyanov, S. Chernouss
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 1, Iss 1, Pp 43-51 (2012)
Following the 38th Annual European Meeting on Atmospheric Studies by Optical Methods in Siuntio in Finland, an intercalibration workshop for optical low light calibration sources was held in Sodankylä, Finland. The main purpose of this workshop was
Externí odkaz:
https://doaj.org/article/52655ebfab1a416389e7186e3ff7a2e4
Autor:
M. Barthélémy, J. Lilensten, F. Pitout, C. Simon Wedlund, R. Thissen, D. Lorentzen, F. Sigernes, J. Moen, G. Gronoff, I. McCrea, H. Rothkael, H. Ménager, A. Aruliah
Publikováno v:
Annales Geophysicae, Vol 29, Pp 1101-1112 (2011)
The polarisation of the atomic oxygen red line in the Earth's thermosphere is observed in different configurations with respect to the magnetic field line at high latitude during several coordinated Incoherent Scatter radar/optical experiment campa
Externí odkaz:
https://doaj.org/article/027fab0a573b4be5afd607693f9f9735
Publikováno v:
Atmospheric Chemistry and Physics, Vol 11, Iss 11, Pp 5485-5490 (2011)
We present a seasonal climatology of tropopause altitude for 78° N 16° E derived from observations 2007–2010 by the SOUSY VHF radar on Svalbard. The spring minimum occurs one month later than that of surface air temperature and instead coincides
Externí odkaz:
https://doaj.org/article/996104c2cadd41079a6d7931032f5b73
Publikováno v:
Annales Geophysicae, Vol 27, Pp 4197-4205 (2009)
Measurements of hydroxyl nightglow emissions over Longyearbyen (78° N, 16° E) recorded simultaneously by the SABER instrument onboard the TIMED satellite and a ground-based Ebert-Fastie spectrometer have been used to derive an empirical formula
Externí odkaz:
https://doaj.org/article/5b1d74da343d4f979e61cd575e7a2524
Autor:
F. Sigernes, N. Lloyd, D. A. Lorentzen, R. Neuber, U.-P. Hoppe, D. Degenstein, N. Shumilov, J. Moen, Y. Gjessing, O. Havnes, A. Skartveit, E. Raustein, J. B. Ørbæk, C. S. Deehr
Publikováno v:
Annales Geophysicae, Vol 23, Pp 1593-1602 (2005)
On 6 December 2002, during winter darkness, an extraordinary event occurred in the sky, as viewed from Longyearbyen (78° N, 15° E), Svalbard, Norway. At 07:30 UT the southeast sky was surprisingly lit up in a deep red colour. The light increased
Externí odkaz:
https://doaj.org/article/11d00d7c86874e96a810129e7d5b3ce5
Publikováno v:
Annales Geophysicae, Vol 23, Pp 1603-1610 (2005)
An anomalous red glow due to scattered sunlight was observed at Longyearbyen (78° N, 15° E) on 6 December 2002 from 07:30 UT to 13:30 UT when the solar zenith angle varied between 100.7° and 104°. A model for this red sky event using sunlight
Externí odkaz:
https://doaj.org/article/1955b5ea0183487db8d7f35e1d4212c3