High-precision orbit determination method based on ground processing of single-frequency navigation raw observation data

Abstract

The invention provides a high-precision orbit determination method based on single-frequency navigation original observation quantity and ground processing, which comprises the following steps: 1) obtaining an original observation quantity and downloading the same; 2) performing quasi-real-time orbit dynamic smoothing process; 3) performing after-event single-frequency precision orbit processing. A satellite-borne navigation receiver downloads a navigation satellite original observation quantity obtained in real time to the ground, the ground improves orbit determination accuracy of a satellite to 0.2m from 10m in magnitude by using a quasi-real-time orbit dynamic smoothing process and the after-event single-frequency precision orbit determination method, thereby the problem of limitation to satellite application caused by low independent orbit determination accuracy of the satellite is successfully solved, a breakthrough is achieved from the ground, and the beneficial effects of reducing the satellite complexity, effectively improving the orbit determination accuracy of the satellite, improving the satellite application capacity and the like are achieved, and a new method for improving orbit determination accuracy is created for follow-up satellites configured with single-frequency BDS, GPS receivers of China, the method will be widely used in the field.

Description

technical field [0001] The present invention relates to a method for orbit determination, in particular to a high-precision orbit determination method based on ground processing of single-frequency navigation original observation data. Background technique [0002] The satellite is equipped with high-dynamic single-frequency GPS (U.S. Global Positioning System) and BDS (China Beidou Satellite Navigation System) receivers, which can obtain the ranging code, carrier phase and Doppler of GPS and BDS navigation signals on the first frequency in real time At the same time, the original observations are used to independently determine the satellite position and velocity according to the received navigation message information. However, because the ionospheric delay in the single-frequency observation value is difficult to accurately model, the navigation satellite orbit and clock error released in the navigation message The accuracy is limited, the computing power of the spaceborn...

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Problems solved by technology

[0003] Aiming at the defects in the prior art, the object of the present invention is to provide a high-precision orbit determination method based on single-frequency navigation raw observation data ground processing, and the spaceborne navigation receiver transmits the real-time obtained navigation satellite raw observation data to the ground, The ground uses quasi-real-time orbit dynamics smoothing processing and post-event single-frequency precision orbit determination processing methods to improve the accuracy of satellite orbit determination from the order of 10 meters to 0.2 meters, successfully solving the problem of low accuracy of satellite independent orbit determination that limits satellite applications , made breakthroughs in ground processing, achieved beneficial effects such as reducing satellite complexity, effectively improving satellite orbit determination accuracy, and improving satellite application capabilities. The method for determining the accuracy of the track, this invention will be widely used in this field

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