A Comparison of GPS Common-View Time Transfer to All-in-View

Published

August 29, 2005

Author(s)

Marc A. Weiss, G. Petit, Zhiheng Jiang

Abstract

All-in-view time transfer is being considered to replace common-view for computing the links of International Atomic Time (TAI). Components in all-in-view GPS time transfer that do not cancel as they do in the common-view technique are the satellite clock estimate and the ephemeris estimate. We show that these components average down as white phase noise with a typical level of 2 ns with 13 minute averaging, though we find a diurnal variation. Looking at closures including stations in Europe, North America and Japan, we see evidence for flicker noise processes in common-view transfer at 100 ps from 3 d past 10 d. We also show evidence that errors in ionospheric maps and multi-path interference can cause noise processes at least as dispersive as flicker phase noise at 300 ps from 1 d past 10 d. We conclude that all-in-view GPS time transfer should not be worse than common-view, though appropriate weights may contribute. We also find that ionosphere-free time transfer data may provide a significant improvement for averaging past 1 d.

Proceedings Title

Proc. Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI Mtg.

Conference Dates

August 29-31, 2005

Pub Type

Conferences

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Keywords

all-in-view, common-view, global positioning system, international atomic time, TAI, time transfer

Citation

Weiss, M. , Petit, G. and Jiang, Z. (2005), A Comparison of GPS Common-View Time Transfer to All-in-View, Proc. Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI Mtg., [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50214 (Accessed December 6, 2024)