Patent ID: 7953555

Claim:
A system comprising one or more base satellite signal receivers and associated antennas with substantial views of the sky, the base satellite signal receivers acquiring and tracking satellite signals and producing range data; a plurality of fixed-position satellite signal receivers, with one or more of the fixed-position satellite signal receivers operating in locations in which at various times the signals from the satellites in certain sky locations are unavailable, weakened or corrupted by multipath at the one or more fixed-position satellite signal receivers, the fixed-position satellite signal receivers acquiring and tracking satellite signals and producing range data; and a data recording and control center for collecting the range data from the one or more base receivers and the fixed-position receivers over an extended period of time and, for a given fixed position satellite signal receiver, batch processing the range data from at least three different intervals associated with different sky positions in which the given fixed position receiver is simultaneously tracking signals from any two satellites and calculating a three-dimensional position of the given fixed-position satellite signal receiver, and recording the position of the given fixed-position receiver.