Patent ID: 8233898

Claim:
A wireless communications device comprising: a portable housing; a temperature-compensated clock circuit carried by said portable housing; a cellular wireless receiver carried by said portable housing, coupled to said temperature-compensated clock circuit and configured to receive timing signals, when available, from a cellular wireless network; a satellite positioning receiver carried by said housing and configured to receive satellite positioning signals; a satellite positioning clock circuit carried by said portable housing and coupled to said satellite positioning receiver; a temperature sensor; and at least one clock correction circuit carried by said portable housing and coupled to said temperature sensor for correcting said temperature-compensated clock circuit based upon timing signals from the cellular wireless network when available, and storing historical correction values for corresponding temperatures, correcting said temperature-compensated clock circuit based upon the stored historical correction values when timing signals are unavailable from the cellular wireless network, and providing an offset correction signal to said satellite positioning receiver based upon said temperature-compensated clock circuit.