Woodman Pollitt, Ronald Francisco2016-11-082017-12-212016-11-082017-12-211963-12-13http://hdl.handle.net/20.500.12816/528"X-531-63-251, NASA,Goddard Space Flight Center, Maryland, December 13, 1963"A combined system consisting of an Interferometer and a Range System has been proposed (Reference #1) for tracking the Apollo spacecraft during the re-entry phase. The system herein discussed processes the output of the above system and performs the following functions.application/pdfenghttps://purl.org/coar/access_right/c_abf2https://creativecommons.org/licences/by/4.0/InterferometryTracking Control SystemsApollo 1http://purl.org/coar/resource_type/c_93fchttp://purl.org/pe-repo/ocde/ford#1.05.01