Various techniques are provided for calibrating a frequency of a local clock using a satellite signal. In one example, a method of transferring frequency stability from a satellite to a device includes receiving a signal from the satellite. The method also includes determining a code phase from the satellite...http://www.google.de/patents/US7859455?utm_source=gb-gplus-sharePatent US7859455 - Local clock frequency calibration using low earth orbit (LEO) satellites
