System and method for determining satellite attitude and orbit

Abstract

The invention provides a satellite attitude orbit determination system and method. The attitude orbit determination module contained in the satellite subsystem obtains pseudorange, pseudorange rate and carrier phase data from the satellite navigation signal from the attitude orbit acquisition module, and uses the pseudorange , pseudo-range rate and carrier phase data, generate inter-satellite relative position information, inter-satellite relative velocity information and three-dimensional position information, perform federated filtering algorithm on three-dimensional position information and satellite starlight elevation angle, generate satellite relative inertial system position information and satellite relative The speed information of the inertial system, using the satellite navigation signal, the satellite attitude angle information and the satellite starlight elevation angle, jointly determines the attitude, generates the three-axis angle, and optimally estimates the three-axis angle to obtain the satellite's three-axis attitude angle and three-axis angle. Attitude angular velocity; the attitude-orbit control computer performs orbit-changing and attitude-adjusting control according to the information output by the attitude-orbit determination module. By adopting the system and method of the present invention, the accuracy of attitude determination and the real-time performance of track determination can be improved.

Description

technical field [0001] The invention relates to the field of aircraft design, in particular to a satellite attitude orbit determination system and method. Background technique [0002] figure 1 It is a schematic diagram of the structure of the existing satellite attitude orbit determination system. Combine now figure 1 , to describe the existing satellite attitude orbit determination system, specifically as follows: [0003] The existing satellite attitude and orbit determination system includes an on-board subsystem 10 and a ground subsystem 11 . Among them, the on-board subsystem 10 is used to obtain the data for determining the satellite orbit and determining the satellite attitude, complete the attitude determination of the satellite according to the data for determining the satellite attitude, and downlink the data for determining the satellite orbit to the ground subsystem 11; System 11 performs orbit determination calculations based on the existing flight dynamics...

AI Technical Summary

Problems solved by technology

[0005] To sum up, in the existing satellite attitude and orbit determination system, the orbit determination result needs to depend on the distance between the satellite and the ground, and the orbit determination operation process completes the complex mathematical operation process for the ground subsystem. In order to improve the orbit determination accuracy, it is necessary to It takes a long calculation cycle; the accuracy of attitude determination using inertial devices alone is not high and needs to be further improved; once the ground subsystem participates in satellite orbit determination, the real-time performance of orbit determination cannot be guaranteed

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