Cosmic Research, Том 25

according activity allowance altitude analysis angle approximation assume atmosphere average axis body boundary calculated characteristics components consider coordinate corresponding curve decrease density dependence described determined direction distance distribution earth effect electric electron energy equal equations error estimates experimental experiments flow flux frequency function Geophys given height increase indicated initial integral intensity interval ionosphere ions issues latitudes layer magnetic field mass maximum mean measurements method Moscow motion observed obtained orbit parameters particles period perturbations planet plasma polar position possible present pressure probe problem profiles quantity radiation radio range region relative respectively rotation Russian satellite shown solar wind solution space spacecraft spectra structure surface Table temperature tion trajectory Uranus values variations vector velocity Venera Venus wave zone