Abstract

The determination of the real high latitude ring current distribution can be made if radial and azimuthal plasma pressure gradients are known. At high latitudes the plasma pressure is nearly isotropic, its calculation requires measurements of particle fluxes in the energy range from 0.1 to the hundreds of keV. Plasma pressure along the trajectory of INTERBALl/Tail Probe was calculated using data of CORALL and DOK-2 devices. It is shown that in most cases plasma pressure increases with the decrease of geocentric distances. The case is selected when pronounced pressure plateau is observed.