Patent ID: 6084544
Filing Date: 2000-07-04
Classification: G01S

Abstract:
A method for determining the location of a satellite receiver comprising the steps of:calculating satellite auxiliary information based on a known location other than a current unknown location of the satellite receiver;transmitting that calculated auxiliary information to the satellite receiver at the unknown location; anddetermining by the satellite receiver of its location by performing the following steps:(a) selecting using the auxiliary information for the known location a trial time for use in calculating a presumed location using at least four satellites;(b) calculating the presumed location of the satellite receiver based on the selected trial time;(c) calculating a first range from the presumed location to a fifth satellite;(d) measuring a second range from the presumed location to the fifth satellite;(e) comparing the first range to the second range;(f) acknowledging the presumed location as the actual current location of the satellite receiver if the first range is substantially equal to the second range; otherwise performing the steps of:(g) selecting a new trial time using the auxiliary information for the known location; and(h) repeating the process beginning with step (b).