A GPS single-receiver pointing/attitude system derives pointing/attitude measurements by correlating a selected GPS code (either P or C/A), recovered from GPS navigation signals using a single GPS receiver with multiple GPS antennas (a reference antenna and at least two slave antennas for pointing or...http://www.google.de/patents/US5185610?utm_source=gb-gplus-sharePatent US5185610 - GPS system and method for deriving pointing or attitude from a single GPS receiver
