Coordinating GPS calibrations among NIST, NRL, USNO, PTB and OP

Abstract

International audienceReviewing calibration results over the history since early 1980s among several labs shows very mixed results. The best stabilities of GPS receivers, as given by calibrations, are of the order of a few nanoseconds or better over a year, though many results are quite a bit worse. Absolute calibrations show similar potential, though there are problems. We conclude that more calibrations and standard methods are needed