Short term GNSS clock characterization using One-Way carrier phase

A major effort has been done over the last years to use the carrier phase of GPS satellites signals for time transfer. Several techniques have been proposed by developing dedicated algorithms for common view time transfer, orbit and time network adjustments or precise point positioning. Such techniques have been widely and successfully used for clock comparison and dissemination, and for the characterization of on-board clocks. In particular, GPS clocks characterization is carried out by network analysis techniques by the USNO, NRL, NGA and IGS analysis centres. It is based on the processing of GPS observables gathered over wide network of sensor stations and therefore requires complex processing of a large amount of data.