Recent improvements in GPS carrier phase frequency transfer

Author

Delporte, Jérôme ; Mercier, Flavien

Author_Institution

CNES, Toulouse

fYear

2005

fDate

29-31 Aug. 2005

Firstpage

699

Lastpage

706

Abstract

GPS carrier phase frequency transfer is a convenient method to compare distant ground clocks. It requires multi-channel dual-frequency GPS receivers in both ground stations. In this paper, CNES specific software for GPS carrier phase frequency transfer is used. It overcomes the usual limitation of some GPS solutions : the day boundaries discontinuities. These discontinuities in the clock solution occur if the data are analyzed in daily independent batches. It is also possible to down sample the measurement files. These two functionalities allow us to perform a continuous GPS carrier phase frequency transfer on long durations. Results on different baselines are presented and discussed. For instance, on medium baselines, stabilities reaching 1.10^-15 (Allan deviation) on one day are commonly obtained. On transatlantic baselines, stabilities are degraded due to the low number of satellites in common view

Keywords

Global Positioning System; atomic clocks; frequency measurement; time measurement; CNES specific software; GPS carrier phase frequency transfer; GPS receivers; distant ground clocks; Clocks; Cryogenics; Data analysis; Degradation; Extraterrestrial measurements; Frequency estimation; Global Positioning System; Laboratories; Satellite ground stations; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-9053-9

Type

conf

DOI

10.1109/FREQ.2005.1574020

Filename

1574020