Satellite orbit error refinement method

Abstract

The invention provides a satellite orbit error refinement method, which comprises the steps of respectively obtaining satellite-ground clock errors based on one-way and two-way time synchronization, comparing the clock errors, and obtaining an original orbit radial error sequence of precise orbit determination; based on the obtained original orbit radial error sequence, adopting a second-order polynomial to carry out orbit error fitting to obtain an orbit radial error correction sequence; and performing orbit error prediction based on a satellite orbit period by utilizing the orbit radial error correction sequence to obtain an orbit error prediction sequence, and converting the orbit error prediction sequence from an orbit coordinate system to an earth-fixed coordinate system to finish orbit error correction of precise orbit determination. According to the satellite orbit error refinement method, satellite orbit errors are effectively monitored, fitted, predicted and corrected under the conditions that dynamic factors are not considered and the range of a monitoring station is not expanded by means of comparing the two clock errors, and a practical Beidou satellite orbit performance improvement method is provided.

Description

technical field [0001] The invention relates to the field of determination of navigation satellite orbits, in particular to an error refinement method for satellite orbits. Background technique [0002] Since the first generation of three-dimensional positioning satellite system in the United States, the Meridian System, was put into operation in 1964, the satellite navigation system has experienced half a century of development, including the GPS of the United States, the GLONASS of Russia, the Galileo of the European Union and the Beidou system of my country. Several navigation systems have provided services or are under development and construction. The emergence of various satellite navigation systems aims to provide global coverage, all-weather, high-precision navigation, positioning and timing services. [0003] Signal-in-Space Range Error (SISRE) is an important index reflecting the performance of navigation system services. The broadcast information broadcast by navi...

AI Technical Summary

Problems solved by technology

Under the complex and changeable international situation at this stage, the scope and process of overseas station deployment cannot be fully guaranteed. The study of satellite dynamic perturbation models requires a large amount of historical data, and its model refinement is a long-term process.

Therefore, under the premise that it is impossible to effectively refine the satellite perturbation model and improve the station deployment area in the short term, how to analyze, predict and correct the satellite orbit error through other means is one of the key problems to be solved urgently for the Beidou system

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