Method for utilizing forwarding range finding value and pseudo range value to determine GEO navigation satellite clock error

Abstract

The invention relates to a method for utilizing forwarding range finding value and pseudo range value to determine GEO navigation satellite clock error. The method comprises the following steps: obtaining GEO navigation satellite transponder time delay value, forwarding range finding value, pseudo range finding value and synchronization forwarding range finding value through laser measurement and definitive orbit calculation, converting the synchronization forwarding range finding value as original satellite ground distance value, and carrying out ionosphere correction on the original satellite ground distance value and the pseudo range finding value to respectively obtain ionosphere corrected satellite ground distance value and ionosphere corrected pseudo range measured value; figuring out real-time GEO navigation satellite clock error; and obtaining satellite transponder time-delayed actual value and after precise GEO navigation satellite clock error through after precision definitive orbit calculation. According to the method, clock error product with second time interval can be provided to improve real-time precision of a navigation positioning system. Also the calculating method used in the invention is simple, thus error in the calculating process is effectively minimized.

Description

technical field [0001] The invention relates to a method for determining the clock error of an atomic clock on a GEO navigation satellite by using a forwarding distance measurement value and a pseudorange value, relates to the field of navigation satellite measurement and orbit determination, and belongs to the subject of astrometry and celestial mechanics. Background technique [0002] The key problem of the positioning accuracy of the navigation satellite system is to determine the clock offset and its variation of the satellite-borne atomic clock. [0003] At present, there are mainly three methods for determining the clock error of navigation satellites: 1) one-way ranging method, which uses the measured pseudorange value and the distance value between the satellite and the synchronous station obtained by orbit positioning, and the difference between the two can be obtained Satellite clock difference. 2) The two-way ranging method uses several radar measuring stations a...

AI Technical Summary

Problems solved by technology

Due to the measurement mechanism, it is difficult to separate the satellite clock error from the station clock error even if multiple observation stations observe at the same time. Determining the satellite clock error has become a technical problem. Usually, the method of group difference is used to obtain the satellite clock error, which will reduce the Determination Accuracy of Satellite Clock Error

[0005] The above method has the disadvantages of a large number of observation equipment, complex calculation methods, the calculation results are affected by the accuracy of satellite orbit determination, and the results of the navigation satellite clock error are slow.

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