Cosmic Research, Том 29

according activity altitude angle angular approximation assume atmosphere average axis body boundary calculated characteristics coefficient components consider constant coordinate system corresponding curve density dependence described determined diffusion direction distribution dynamics Earth effect electron energy equal equations error estimate experiments expression field flight flux function given heat height increase initial integral intensity interval ionosphere ions issues limitations linear magnetic Mars mass matrix maximum means measurements method Moscow motion observed obtained optimal optimum orbit parameters particles phase plane plasma position possible potential presented pressure problem profiles radiation region relation relative respectively Russian satellite shown shows solar solar cosmic ray solution solving space spacecraft station surface Table temperature tion trajectory transfer upper values variables variations vector velocity wave wind