Title :
Redundancy and correlations in TAI time links
Author :
Petit, G. ; Jiang, Z.
Author_Institution :
Time Sect., BIPM, Sevres
Abstract :
The network of time links for the computation of TAI has always be chosen such as to allow a unique solution, i.e. not using any redundancy. In the present situation, many links can be computed with two or more techniques (mostly TW and GPS) and the TW network itself is highly redundant. In addition, the covariance matrix for the measurements from these two may now be determined with adequate uncertainty, so that it makes sense to use all the available information and to compute TAI links using the available redundant network. In the paper, we examine the formalism to be used in this aim and the consequences of using such a procedure
Keywords :
Global Positioning System; covariance matrices; measurement uncertainty; time measurement; GPS; TAI time links; TW network; covariance matrix; Clocks; Computer networks; Covariance matrix; Equations; Frequency measurement; Global Positioning System; Intelligent networks; Laboratories; Phase measurement; Time measurement;
Conference_Titel :
Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-9053-9
DOI :
10.1109/FREQ.2005.1573956
