Cosmic Research, Том 23

acceleration aerodynamic algorithm altitude angle angular approximation assume atmosphere axes axis calculated center of mass characteristic cm³ CO₂ coefficients comet Comet Halley cometary components coordinate system corresponding curves density dependence determined diffusion dynamic earth electric field electrons energy equations errors estimates flare flux frequency function geomagnetic Geophys gravitational grid inertia integral interval ionosphere ions Issled Kosm Kosmicheskie Issledovaniya latitudes libration linear magnetic field magnetosphere matrix maximum measurements method Moscow motion observed obtained Oort cloud optimal orbit Original article submitted oscillations parameters particles period perturbations phase plane plasma problem protons radiation belts radius region resonance rotation Russian satellite satellite's shock wave sin² solar wind solution space spacecraft spectra spectrum structure surface t₁ temperature thermosphere tion trajectory Translated from Kosmicheskie values variables variation vector velocity Venera Venera 15 Venus