Zobrazeno 1 - 10
of 72
pro vyhledávání: '"B. Holback"'
Autor:
B. Holback, Å. Jacksén, L. Åhlén, S.-E. Jansson, A. I. Eriksson, J.-E. Wahlund, T. Carozzi, J. Bergman
Publikováno v:
Annales Geophysicae, Vol 19, Pp 601-610 (2001)
The Swedish micro-satellite Astrid-2, designed for studies in magnetosperic physics, was launched into orbit on 10 December 1998 from the Russian cosmodrome Plesetsk. It was injected into a circular orbit at 1000 km and at 83 degrees inclinatio
Externí odkaz:
https://doaj.org/article/06b62b9b5bc8452da26afa70cabee524
Publikováno v:
Annales Geophysicae, Vol 19, Pp 655-666 (2001)
The presence of a satellite disturbs the ambient plasma. The charging of the spacecraft creates a sheath around it, and the motion of the satellite creates a wake disturbance. This modification of the plasma environment introduces difficulties
Externí odkaz:
https://doaj.org/article/cd098a2f521e41458eb92bff1071ae19
Autor:
S.-E. Jansson, Å. Jacksén, J. Bergman, B. Holback, Tobia Carozzi, Jan-Erik Wahlund, Anders Eriksson, L. Åhlén
Publikováno v:
Annales Geophysicae, Vol 19, Pp 601-610 (2001)
Annales Geophysicae, Vol 19, Iss 6, Pp 601-610 (0000)
Annales Geophysicae, Vol 19, Iss 6, Pp 601-610 (0000)
The Swedish micro-satellite Astrid-2, designed for studies in magnetosperic physics, was launched into orbit on 10 December 1998 from the Russian cosmodrome Plesetsk. It was injected into a circular orbit at 1000 km and at 83 degrees inclination. The
Autor:
Peter W. Schuck, David N. Walker, William E. Amatucci, B. Holback, S. Powell, Paul M. Kintner, D. Leonhardt
Publikováno v:
Review of Scientific Instruments. 72:2052-2057
A technique for removing surface contaminants from a sounding rocket spherical Langmuir probe is presented. Contamination layers present on probe surfaces can skew the collected data, resulting in the incorrect determination of plasma parameters. Des
Autor:
Hannu Koskinen, B. Holback, A. Malkki, J. S. Mäkelä, J. H. Clemmons, Robert E. Erlandson, Lena Eliasson
Publikováno v:
Journal of Geophysical Research: Space Physics. 104:17201-17215
We have used density measurements made by the Freja satellite to analyze the dynamical behavior of mesoscale auroral cavities at an altitude of 1700 km. Freja's orbital period of 109 min enabled a very large data set of cavity occurrences to be colle
Publikováno v:
Journal of Geophysical Research: Space Physics. 103:9391-9404
We have used data from the Freja satellite, with an apogee of 1700 km over the auroral oval, to make a statistical analysis of mesoscale auroral plasma density cavities. Such cavities are defined to be regions in the auroral zone with size scales bet
Autor:
Philippe Louarn, Alain Roux, Jan-Erik Wahlund, Hervé de Feraudy, Martin Volwerk, B. Holback, Thomas Chust
Publikováno v:
Journal of Geophysical Research: Space Physics. 103:215-224
Using plasma wave data sampled by the Freja spacecraft from the topside ionosphere during auroral conditions, the possible existence of electric fields with an intense parallel component (a few tens of millivolts per meter) with respect to the Earth'
Publikováno v:
Journal of Geophysical Research: Space Physics. 102:11385-11398
Solitary electrostatic waves (SWs) were frequently observed by the Viking satellite in the auroral plasma. Previously, Malkki et al. [1993] reported occurrence statistics and voltage data for these structures. In this paper, we make a detailed study
Publikováno v:
Journal of Geophysical Research: Space Physics. 102:7217-7224
The properties of the solitary kinetic Alfven waves (SKAWs) observed by Freja satellite are studied statistically for a typical event on March 7, 1994. The eigenmode of the SKAWs observed is still recognized by their anisotropic structure (1000 km x
Autor:
Lars Eliasson, Anders Eriksson, M. Boehm, B. Holback, J. Waldemark, Rolf Boström, P. O. Dovner
Publikováno v:
Geophysical Research Letters. 24:619-622
Lower hybrid cavities (LHC), i. e., small-scale density depletions coinciding with enhanced lower hybrid waves, are frequent in the upper ionosphere. It is found that they exist in all regions the Freja satellite has scanned, as long as lower hybrid