Navigazione spaziale

Abstract

L&igrave; rie fi y are discussed the priucipal aspects of " space<br />navigation ". which can be divided in three phases:<br />circuinnavigation of the Earth (parking orbit or departure);<br />middle or interplanatery navigation;<br />approach and landing 011 the pia net.<br />The radio-assistence from the Earth, with transponder, may play the<br />principal iole for the first two phases, while for the last phase, the astronauta<br />must rely 011 the self-contained navigation: electronics and observation.<br />The energy reserve reduce&raquo; the general needs of space navigation.