A Calibration of GPS Equipment at Time and Frequency Standards Laboratories in the USA and Europe

Abstract
The method of clock comparisons using GPS satellites in common view is now widely used in the time laboratories which participate in the international unification of time under the coordination of the Bureau International des Poids et Mesures (BIPM). We report here the results of a campaign of calibration of time delay in GPS receivers under the auspices of the BIPM with the assistance of the National Bureau of Standards (NBS), Boulder, CO. This trip in the United States and in Europe was performed from September 29, 1986 to October 27, 1986.