Methods for correcting higher-order ionospheric effects on the positioning and timing of GPS.

Details Methods for correcting higher-order ionospheric effects on the positioning and timing of GPS. Methods for correcting higher-order ionospheric effects on the positioning and timing of GPS.

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pshao..19...53y&link_type=abstract

Publ. Shaanxi Astron. Obs., Vol. 19, p. 53 - 58

Astronomy and Astrophysics

Astronomy

Earth Ionosphere: Time Signals, Time Signals: Methods Of Reduction

Scientific paper

One of the main error sources for positioning and timing in GPS is ionospheric refraction error. At present the dual-frequencies technique has been used for correcting the first-order ionospheric effect. The accuracy of 1 - 10 m for positioning or 3 - 30 ns for timing has been obtained by this technique. However, the second-order ionospheric effect needs to be corrected to reach higher accuracies of centimeters, and the third-order ionospheric effect should be corrected for the accuracies of millimeters. In this paper the methods which can correct not only the first-order but also the second and third-order ionospheric effects are proposed, and both of dual-frequencies technique and dual-polarization technique are used in these methods.

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