Least-Squares Analysis of Two-Way Satellite Time and Frequency Transfer Measurements

J.A. Davis, P.M. Harris, S.L. Shemar, M.G. Cox

Abstract:	The least-squares analysis of Two- Way Satellite Time and Frequency (TWSTFT) data, with the aim of determining optimal estimates of phase and frequency offsets, is considered. An overview of the application of Gauss-Markov estimation to the analysis of a uniformly spaced time series is presented. Two aspects of TWSTFT data analysis are examined in depth. Firstly, measures based on second difference statistics for characterizing the consistently but unevenly spaced TWSTFT measurements are introduced. Secondly, an approach to the estimation of the occasional and unknown delay steps in TWSTFT data, for example due to hardware replacement, is presented.
Published in:	Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting November 27 - 27, 2001 Hyatt Regency Long Beach Long Beach, California
Pages:	121 - 132
Cite this article:	Davis, J.A., Harris, P.M., Shemar, S.L., Cox, M.G., "Least-Squares Analysis of Two-Way Satellite Time and Frequency Transfer Measurements," Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, November 2001, pp. 121-132.
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