Effects of Ionospheric Delay Estimationon Time Transfer via GPS

Lara Schmidt, Rainer Krämer

Abstract:	Several methods are routinely used to correct for ionospheric delays in GPS time transfer including the single-frequency model, codeless cross-correlation delay measurements, and true dual-frequency Y-code measurements. This paper discusses the performance of these estimation techniques and indicates the extent to which higher levels of solar activity introduce errors into the estimates of ionosphere delay. Common-view time transfer errors resulting from ionospheric delay estimation are identified, as are the potential impacts on international timescale formulation.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	1073 - 1080
Cite this article:	Schmidt, Lara, Krämer, Rainer, "Effects of Ionospheric Delay Estimationon Time Transfer via GPS," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 1073-1080.
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