A high-latitude boundary layer crossing-INTERBALL measurements and MHD model results
| Autor: | U. Auster, H. Wiechen, K.H. Fornacon, Stanislav Klimov, S. Savin, B. Nikutowski, Jörg Büchner, J. Rustenbach |
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| Rok vydání: | 1998 |
| Předmět: |
Physics
Atmospheric Science Magnetometer Aerospace Engineering Astronomy and Astrophysics Instability law.invention Magnetic field Computational physics Boundary layer Geophysics Classical mechanics Space and Planetary Science law Physics::Space Physics Orbit (dynamics) General Earth and Planetary Sciences Magnetopause Satellite Magnetohydrodynamics |
| Zdroj: | Advances in Space Research. 22:161-165 |
| ISSN: | 0273-1177 |
| Popis: | We analyze the highly variable magnetic field behavior after a high-latitude outbound boundary layer crossing of the INTERBALL-1 main satellite on August 26, 1995, using data obtained by the fluxgate magnetometer FGM-1. We suggest that the oscillations, observed immediately after the first magnetopause crossing, are due to a Kelvin-Helmholtz instability. We verify this suggestion by appropriate MHD simulations. For the sake of a direct comparison we present the simulation results in a frame moving through the propagating structure at the relative speed of the satellite along its orbit. As a result we have found that the observed signatures compare well with the simulated crossing of a Kelvin-Helmholtz unstable magnetopause. |
| Databáze: | OpenAIRE |
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