Zobrazeno 1 - 10
of 93
pro vyhledávání: '"I. Sandahl"'
Autor:
H. Dahlgren, B. Gustavsson, B. S. Lanchester, N. Ivchenko, U. Brändström, D. K. Whiter, T. Sergienko, I. Sandahl, G. Marklund
Publikováno v:
Annales Geophysicae, Vol 29, Pp 1699-1712 (2011)
Two discrete auroral arc filaments, with widths of less than 1 km, have been analysed using multi-station, multi-monochromatic optical observations from small and medium field-of-view imagers and the EISCAT radar. The energy and flux of the precip
Externí odkaz:
https://doaj.org/article/c9eb7aa4b2d0428e99dba1152d8be748
Autor:
Y.-M. Tanaka, T. Aso, B. Gustavsson, K. Tanabe, Y. Ogawa, A. Kadokura, H. Miyaoka, T. Sergienko, U. Brändström, I. Sandahl
Publikováno v:
Annales Geophysicae, Vol 29, Pp 551-562 (2011)
Aurora Computed Tomography (ACT) is a method for retrieving the three-dimensional (3-D) distribution of the volume emission rate from monochromatic auroral images obtained simultaneously by a multi-point camera network. We extend this method to a
Externí odkaz:
https://doaj.org/article/bb08c211b4a84ddea63154c2ea957a35
Publikováno v:
Annales Geophysicae, Vol 26, Pp 3185-3195 (2008)
We present results of an investigation of the fine structure of the night sector diffuse auroral zone, observed simultaneously with optical instruments (ALIS) from the ground and the FAST electron spectrometer from space 16 February 1997. Both the
Externí odkaz:
https://doaj.org/article/3640d86de02a46839101b1a66e8388e0
Autor:
S. Chernouss, I. Sandahl
Publikováno v:
Annales Geophysicae, Vol 26, Pp 1127-1140 (2008)
Results of measurements and visual observations of aurora at Spitsbergen, carried out by the joint Swedish-Russian expedition during 1899–1900, are described. Auroral observations took place during the great bilateral Arc-of-Meridian expedition,
Externí odkaz:
https://doaj.org/article/57c6d90af8074ee984756d63dc491f2d
Autor:
I. Sandahl, A. Wikström
Publikováno v:
Advances in Geosciences, Vol 3, Pp 35-40 (2005)
The town of Kiruna in the north of Sweden has a concentration of space activities and space research with, for example, the Swedish Institute of Space Physics, Esrange, the ESA Salmijärvi satellite station, and EISCAT (European Incoherent Scatter Ra
Externí odkaz:
https://doaj.org/article/41faf367d1cc43fd8509dd490abe8213
Autor:
Y. Ebihara, M. Ejiri, H. Nilsson, I. Sandahl, M. Grande, J. F. Fennell, J. L. Roeder, D. R. Weimer, T. A. Fritz
Publikováno v:
Annales Geophysicae, Vol 22, Pp 1297-1304 (2004)
Multiple discrete-energy ion bands observed by the Polar satellite in the inner magnetosphere on 9 February 1998 were investigated by means of particle simulation with a realistic model of the convection electric field. The multiple bands appear
Externí odkaz:
https://doaj.org/article/20b96e40d67f4abfbbc36b0ab60ba3ae
Autor:
S. Savin, L. Zelenyi, S. Romanov, I. Sandahl, J. Pickett, E. Amata, L. Avanov, J. Blecki, E. Budnik, J. Büchner, C. Cattell, G. Consolini, J. Fedder, S. Fuselier, H. Kawano, S. Klimov, V. Korepanov, D. Lagoutte, F. Marcucci, M. Mogilevsky, Z. Nemecek, B. Nikutowski, M. Nozdrachev, M. Parrot, J. L. Rauch, V. Romanov, T. Romantsova, C. T. Russell, J. Safrankova, J. A. Sauvaud, A. Skalsky, V. Smirnov, K. Stasiewicz, J. G. Trotignon, YU. Yermolaev
Publikováno v:
Annales Geophysicae, Vol 22, Pp 183-212 (2004)
We advance the achievements of Interball-1 and other contemporary missions in exploration of the magnetosheath-cusp interface. Extensive discussion of published results is accompanied by presentation of new data from a case study and a comparison o
Externí odkaz:
https://doaj.org/article/798c33191cd440f2aa5601f32ab42018
Autor:
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, Q.-G. Zong
Publikováno v:
Annales Geophysicae, Vol 19, Pp 1355-1366 (2001)
The advanced energetic particle spectrometer RAPID on board Cluster can provide a complete description of the relevant particle parameters velocity, V , and atomic mass, A, over an energy range from 30 keV up to 1.5 MeV. We present the first me
Externí odkaz:
https://doaj.org/article/7629bc0e7c6b4d209a5a35415bfb4e6f
Publikováno v:
Annales Geophysicae, Vol 19, Pp 495-519 (2001)
Abstract. Simultaneous DMSP F7 and Viking satellite measurements of the dawnside high-latitude auroral energy electron and ion precipitation show that the region of the low and middle altitude auroral precipitation consists of three characteristic
Externí odkaz:
https://doaj.org/article/3a7ea1e46e264126b0925c358b19ef1f
Autor:
I. Sandahl, S. Barabash, H. Borg, E. Y. Budnik, E. M. Dubinin, U. Eklund, H. Koskinen, K. Lundin, R. Lundin, A. Mälkki, R. Pellinen, N. F. Pissarenko, T. Pulkkinen, A. V. Zakharov
Publikováno v:
Annales Geophysicae, Vol 17, Pp 659-673 (1999)
The PROMICS-3 instrument on Interball-2 is nominally identical to the PROMICS-3 instrument on Interball-1. It performs three-dimensional measurements of ions in the energy range 4 eV-70 keV with mass separation and of electrons in the energy range
Externí odkaz:
https://doaj.org/article/21766fbbc38e467f8f2c52b9023e575d