Continuous, multi-channel, common-view, L1-GPS time-comparison over a 4,000 km baseline

Author

Giffard, Robin P. ; Cutler, L.S. ; Kusters, John A. ; Miranian, Mihran ; Allan, David W.

Author_Institution

Hewlett-Packard Co., Palo Alto, CA, USA

fYear

1996

fDate

5-7 Jun 1996

Firstpage

1198

Lastpage

1205

Abstract

We are investigating a method of time comparison described as “Advanced Common-View GPS” or GPS-ACV. This is a technique that uses the largest possible number of observations on all satellites in common-view to average short-term noise and reduce the effect of errors. The goal is to make optimum use of all degrees of freedom afforded by the data. We have recently tested the ACV method over a 4,000 km baseline using inexpensive, single-frequency, modular GPS receivers. The results indicate that a measurement noise of less than 1 nanosecond can be obtained for averaging times of 1 and 2 days. The equivalent uncertainty for frequency transfer is below 10^-14

Keywords

Global Positioning System; measurement errors; measurement standards; time measurement; 4000 km; 4000 km baseline measurements; Advanced Common-View GPS; active microstrip patch antennas; continuous multi-channel common-view L1-GPS time-comparison; error reduction; frequency transfer; measurement noise; short-term noise averaging; single-frequency modular GPS receivers; time scales; Aircraft navigation; Clocks; Computer errors; Frequency; Global Positioning System; Ionosphere; Laboratories; Noise reduction; Satellites; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.

Conference_Location

Honolulu, HI

Print_ISBN

0-7803-3309-8

Type

conf

DOI

10.1109/FREQ.1996.560313

Filename

560313