GPS receiver perfected using a communication link.

摘要

Frequency signal CARRIER FOR PRECISION GAUGE LOCAL oscillator (56) of a GPS RECEIVER TO ACQUIRE SIGNALS USED GPS. SIGNAL FREQUENCY CARRIER PRECISION IS USED TO CALIBRATE THE ROCKER LOCAL, so that the output of the local oscillator, that to acquire GPS signals is used, modified by a reference signal GENERATED SIGNAL FREQUENCY CARRIER OF PRECISION . EXAMINING GPS receiver (53) THIS FREQUENCY SIGNAL CARRIER AND GENERATING PRECISION reference signal. In another aspect of the invention, broadcast almanac data satellite to a remote GPS receiver unit (20) from a database (12) station via a communications link. GPS receiver unit uses this data REMOTA almanac SATELLITE DATA TO DETERMINE THE APPROXIMATE FOR DOPPLER satellites SIGHT OF REMOTE GPS receiver unit.