First Results on a Transatlantic Time and Frequency Transfer by GPS Carrier Phase
Abstract
Time and frequency transfer by GPS carrier phase, also referred to as Geodetic Time Transfer (GeTT), has been studied intensively in the frame of a collaboration between the Swiss Federal Office of Metrology (OFMET) and the Astronomical Institute of the University of Berne (AIUB). Two terminals equipped with geodetic GPS receivers have been built and were successfully deployed over European baselines. The study has demonstrated the low instrumental noise of GeTT (q(4 = 1@13 at z = 100 s) which makes this method an ideal tool for frequency comparisons between high performance clocks since much shorter averaging times are required than with GPS common view. This new time and frequency transfer method is now to be tested over longer baselines. In this paper we report on a transatlantic campaign between the Physikalisch-Technische Bundesanstalt in Germany (PTB) and the US Naval Observatory, Washington (USNO). Besides the longer baseline the choice of these two sites offers also the possibility to compare frequently GeTT and TWSTFT. The paper outlines the main parts of a GeTT campaign and summarizes the first results of time and frequency transfer by GPS carrier phase between PTB and USNO.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1998
- Accession Number
- ADA507745
Entities
People
- E. Powers
- F. Overney
- G. Dudle
- L. Prost
- P. Hetzel
- T. Springer
- Th. Schildknecht
Organizations
- United States Naval Observatory