| 摘要 |
A method and apparatus for accurately and precisely determining the position coordinates of a receiver (15) located at a predetermined site using signals broadcast from a plurality of orbiting satellites (13) and using information derived from a second receiver (17) located at a reference site having known coordinates. Carrier phase measurements made by the two receivers on all of the incoming satellite signals are incorporated into a special square root information filter matrix (31) that permits a convenient determination of phase noise in the satellite and receiver clocks, for use in subsequently correcting the phase measurements. The position coordinates of the unknown site are determined in a special three-stage procedure that generates, successively, a hyperbolic solution, a Doppler pseudorange solution, and a resolved lane solution. |
