High Precision Time and Frequency Transfer Using Gps Phase Measurements

The use of GPS CIA code measurements for time transfer by means of the so-called common view method is a widely accepted technique. The fuU pdeniiul of the GPS system for time and frequency transfer is, however, only exploited by using all phase and code observables from aU satellites in view. Gedetic processing techniques, adapted to the specifi requirements to process data from specWy modified geodetic receivers, wiU be presented. We wiU also discuss the requirements for the receivers, and the control as well as the calibration of instrumental dehys. The potential of the technique will be illustrated by laboratory experiments and measurement campaigns on continental and intercontinental baselines.