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Analysis on Unexpected Orbit Errors of GPS Satellite Broadcasting Ephemeris

QI Wei-jun

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Abstract

This paper focuses on the problem of unexpected orbital errors from the broadcast ephemeris of GPS satellite.Chebyshev Polynomial is used to calculate coordinates of satellites respectively with different fitting time interval.Comparison is made with IGS precise ephemeris which reveals unexpected orbit errors derived from GPS broadcast ephemeris.This is of significance for eliminating GPS orbit errors in broadcast ephemeris and for improving navigation and positioning accuracies.

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What this paper is about

This paper focuses on the problem of unexpected orbital errors from the broadcast ephemeris of GPS satellite.Chebyshev Polynomial is used to calculate coordinates of satellites respectively with different fitting time interval.Comparison is made with IGS precise ephemeris which reveals unexpected orbit errors derived from GPS broadcast ephemeris.This is of significance for eliminating GPS orbit errors in broadcast ephemeris and for improving navigation and positioning accuracies.

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Available abstract

This paper focuses on the problem of unexpected orbital errors from the broadcast ephemeris of GPS satellite.Chebyshev Polynomial is used to calculate coordinates of satellites respectively with different fitting time interval.Comparison is made with IGS precise ephemeris which reveals unexpected orbit errors derived from GPS broadcast ephemeris.This is of significance for eliminating GPS orbit errors in broadcast ephemeris and for improving navigation and positioning accuracies.

Key concepts: Ephemeris, Global Positioning System, Geodesy, Orbit (dynamics), Satellite, Orbit determination, Computer science, Remote sensing

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