Ionospheric time delay corrections for GPS time transfer

Details Ionospheric time delay corrections for GPS time transfer Ionospheric time delay corrections for GPS time transfer

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jtf....26..144s&link_type=abstract

Journal of Time and Frequency (ISSN 1001-1544), Vol. 26, No. 2, p. 144 - 152 (2003)

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Computation

Gps Common-View, Time Transfer

Scientific paper

GPS common-view is still one of the most powerful tools in the TAI computation up to now. To improve the precision for GPS time transfer is becoming more and more important along with the continuous improving of the qualities of atomic clocks. The precision lies on a few effects among which ionospheric delay is an important one. The method of calculating the ionospheric delay using TEC-map is introduced. The results indicate that the precisions for single-station timing and GPS-CV (Common-View) time transfer after correcting the ionospheric delay with TEC-map are better than those with the theoretical model for single-frequency GPS receivers. Besides, the comparisons show that the precisions for time transfer between time labs in Asia-Pacific region are lower than those in Europe and America, which is probably because there are much less IGS stations to measure TEC so as to cause lower precisions of TEC for Asia-Pacific region.

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