Time and frequency transfer by geodetic GPS: Comparison of receivers and computation techniques

Geodetic GPS techniques based on dual-frequency phase and code measurements are now commonly used to perform time and frequency transfer. We present results from a dedicated experiment carried out to compare different types of geodetic GPS receivers and different processing techniques. Two time laboratories provide data from three different types of receivers as well as from Two-way time transfer and this dedicated data set is completed by data obtained from other laboratories participating to TAI. Comparisons of results between GPS analyses with two software packages and two processing techniques, and between GPS and TW are presented and discussed.