Cooperative Orbit Determination Method Based on Optical Observation of Space Objects by Constellation

Abstract

The invention discloses a coordinated orbit determination method for space targets based on the optical observation of constellations, belonging to the aerospace field. The implementation method of the present invention is as follows: during the flight process of the spacecraft around the central celestial body, the orbital dynamics model of the spacecraft relative to the central celestial body is established, and the state model of the constellation optical observation coordination system is constructed; based on the relative line of sight of the constellation to the target spacecraft Vector direction measurement, combining the observation information of multiple observation stars on the target star, and establishing the observation model of the orbit determination system; combined with the established state model of the constellation optical observation orbit determination system, and the established observation model of the constellation optical observation orbit determination system, The nonlinear navigation filter algorithm is used to estimate the position of the target star, and the orbit parameters of n observation stars are corrected at the same time, that is, the cooperative orbit determination of the space target based on the optical observation of the star group is realized. The invention can improve the optical orbit determination accuracy of the space target, and provide technical reference for future space target observation and tracking.

Description

technical field [0001] The invention relates to a cooperative orbit determination method for optical observation of space targets based on constellations, and belongs to the field of aerospace. Background technique [0002] During the flight of the spacecraft around the central celestial body, it is necessary to observe and track the space target and estimate its orbit, and at the same time correct its own orbital parameters, so as to ensure the smooth development of space missions. Considering that some space target spacecraft are non-cooperative targets for observation spacecraft, and information exchange cannot be performed between them, optical observation is the best observation strategy. The spaceborne optical camera carried by the observation spacecraft takes pictures of the target spacecraft, and determines the line-of-sight direction of the target relative to the observation star in the inertial system based on its own inertial attitude information. The orbital dyn...

AI Technical Summary

Problems solved by technology

However, the coordinated orbit determination of single-star optical observations has the problems of low orbit determination efficiency, insufficient orbit determination accuracy, and even inability to determine orbits under certain geometric configurations.

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