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Ann. Geophys., 15, 562-569, 1997
www.ann-geophys.net/15/562/1997/
© European Geosciences Union 1997
Small scale observation of magnetopause motion: preliminary results of the INTERBALL project
J. Safrankova1, G. Zastenker2, Z. Nemecek1, A. Fedorov2, M. Simersky1, and L. Prech1
1Faculty of Mathematics and Physics of Charles University, Prague, Czech Republic
2Space Research Institute, Academy of Sciences of Russia, Moscow, Russia
Abstract. Two satellites of the INTERBALL project were
launched on 3 August 1995. The main goals of the present paper are (1) to give a
brief information about the VDP plasma device onboard the INTERBALL-1 satellite,
(2) to present the Faradays cup data taken in different magnetospheric regions
and (3) to expose first results of the two satellite measurements of the
magnetopause motion. The presented data illustrate magnetopause crossings as
seen by two satellites when separated by about ~ 1000 km. This separation
combined with the Faraday's cup time resolution allows to estimate the velocity
of the magnetopause and to reconstruct a possible structure of the boundary.
Simultaneous measurement of the magnetic field supports the interpretation of
the observed ion fluxes as a signature of the wavy motion of the boundary.
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