We review the development and status of GPS geodetic methods for high-precision global
time and frequency comparisons. A comprehensive view is taken, including hardware effects …

The development within the International GPS Service (IGS) of a suite of clock products, for
both satellites and tracking receivers, offers some experiences which mirror the operations …

We have conducted several time-transfer experiments using the phase of the GPS carrier
rather than the code, as is done in current GPS-based time-transfer systems. Atomic clocks …

An absolute calibration technique is developed for geodetic Global Positioning System
(GPS) receivers. An uncertainty budget for the system (receiver, cables, connectors …

This work covers a broad range of different topics such as orbit modeling, orbit validation
using satellite laser ranging observations, time transfer, station coordinates and velocities …

The GRACE mission consists of two identical satellites orbiting the Earth at an altitude of∼
500 km. Dual-frequency carrier-phase Global Positioning System (GPS) receivers are flying …

A joint time-transfer project between the Astronomical Institute of the University of Berne
(AIUB) and the Swiss Federal Office of Metrology and Accreditation (METAS) was initiated to …

We have conducted global positioning system (GPS) carrier-phase time-transfer
experiments between the master clock (MC) at the US Naval Observatory (USNO) in …

Modern dual-frequency global positioning system (GPS) receivers are capable of providing
direct measurements of both L 1 C/A (C 1) and P code (P 1) without the use of the Y-codes …

We have conducted several time-transfer experiments using the phase of the GPS carrier
rather than the code as is done in current GPS based time-transfer systems. We connected …