Method and apparatus for managing time in a satellite positioning system

Time management method and apparatus in a positioning system is disclosed. In one embodiment, the time relationship is received on the server. The timing relationship includes a relationship between the satellite time for a satellite group from the air interface time of the first satellite positioning system (SPS) receiver in a base station. Time relationship is stored on the server. In another example, the satellite time to the SPS receiver is measured at a first time. The time offset between the satellite time and the air interface time of the base station is determined. The time offset is stored in the SPS receiver. The position of the SPS receiver using satellite measurements and the stored time offset in the second time is calculated.