A description of several types of atmospheric entry that may occur in the course of various space missions. The phenomena accompanying entry are also considered. In particular, the paper discusses (1) the dynamics of various types of entry, (2) the results of analytic and numerical solutions for the emtry of both lifting and nonlifting vehicles into planetary atmospheres, (3) the effects of initial entry conditions and of the vehicle's gasdynamic characteristics on its motion and heating, and (4) the characteristics of several types of surface-protection and cooling systems and their application to various types of atmospheric entry.
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