Abstract
We investigate the behaviour of the plasma parameters in the magnetosheath in a case when Interball-1 satellite stayed in the magnetosheath, crossing the tail magnetopause. In our analysis we apply the numerical magnetosheath-magnetosphere model as a theoretical tool. The bow shock and the magnetopause are self-consistently determined in the process of the solution. The flow in the magnetosheath is governed by the Euler equations of compressible ideal gas. The magnetic field in the magnetosphere is calculated by a variant of the Tsyganenko model, modified to account for an asymmetric magnetopause. Also, the magnetopause currents in Tsyganenko model are replaced by numericaly calulated ones. Measurements from WIND spacecraft are used as a solar wind monitor. The results demonstrate a good agreement between the model-calculated and measured values of the parameters under investigation.
Highlights
The Earth magnetosheath is a transitional region between the bow shock and the magnetopause in which the solar plasma is heated, decelerated and compressed
We investigate the behaviour of the plasma parameters in the magnetosheath in a case when Interball-1 satellite stayed in the magnetosheath, crossing the tail magnetopause
The model takes into account the solar wind variations in some extend, it was not adapted to practical purposes and has some serious shortcomings
Summary
The Earth magnetosheath is a transitional region between the bow shock and the magnetopause in which the solar plasma is heated, decelerated and compressed. It plays a crucial role in solar-terrestrial relations, because the solar wind energy is transmitted through it and propagates to the magnetosphere and ionosphere. The model presents two-dimensional picture of flow properties in the magnetosheath for given input data, which are the solar wind Mach number, polytropic index and a predetermined magnetopause position. The model takes into account the solar wind variations in some extend, it was not adapted to practical purposes and has some serious shortcomings It does not allow for the north-south and.
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