Limits on GPS Carrier-Phase Time Transfer

M. A. Weiss

Abstract:	The stability of differential delays between Global Navigation Satellite receivers is critical for time and frequency transfer. We study the limit of this transfer between two specific receivers due to effects in data taken from these receivers while they were connected with a splitter to the same antenna for 128 days. We show that the C/A-to-P1 TDEV stability is consistent with a flicker PM model at about 10 ps from 1 d – 10 d. The TDEV stability of differential code shows models of flicker PM at under 50 ps for C/A code, and white PM starting at under 100 ps at 1 d for P2 code. P3 code transfer would perhaps be limited by receiver variations to about 400 ps flicker PM. Carrier-only transfer shows a rate offset of +2 ×10-16for L1 and -2 × 10-16for L2. Thus, a carrier-only frequency transfer technique would be limited to 8 × 10-16for the ionosphere-free combination.
Published in:	Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting November 16 - 19, 2009 Hyatt Regency Tamaya Resort Santa Ana Pueblo, New Mexico
Pages:	101 - 110
Cite this article:	Weiss, M. A., "Limits on GPS Carrier-Phase Time Transfer," Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting, Santa Ana Pueblo, New Mexico, November 2009, pp. 101-110.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In