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Ann. Geophys., 15, 553-561, 1997
www.ann-geophys.net/15/553/1997/
© European Geosciences Union 1997
Structure of the low-latitude magnetopause: MAGION-4 observations
Z. Nemecek1, A. Fedorov2, J. Safrankova1, and G. Zastenker2
1Faculty of Mathematics and Physics of Charles University, Prague, Czech Republic
2Space Research Institute, Academy of Sciences of Russia, Moscow, Russia
Abstract. The aims of this paper are (1) briefly to
describe the plasma devices onboard the MAGION-4 satellite, launched on 3 August
1995, of the INTERBALL project, and (2) to discuss first observations made near
the magnetopause region. During the presented boundary crossings the MAGION-4
observed quasi-periodic pulses of magnetosheath-like plasma in a region of low
plasma density. This region is located just earthwards of the magnetopause and
is populated by a plasma which, except for the density, has the same parameters
as in the magnetosheath. Deeper in the magnetosphere, the encounter of a layer
of hot electrons and high-energy ions was interpreted as low-latitude boundary
layer.
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