Satellite autonomous navigation system and method integrating pulsar radiation vector and timing observation

Abstract

The invention discloses a satellite autonomous navigation system and a satellite autonomous navigation method integrating a pulsar radiation vector and timing observation. The system obtains pulse arrival time and accurately obtains a pulsar radiation direction vector by using a time distinguishing detector and a collimator, and obtains a geocentric direction vector by using an infrared or ultraviolet horizon sensor; a navigation computer respectively completes a pulsar timing observation navigation algorithm under a geocentric coordinate system, a pulsar positioning algorithm based on angular distance measurement and a geometric orientation algorithm based on angular distance measurement by using the pulsar pulse arrival time, the radiation direction vector and the geocentric direction vector, and obtains the position, the speed, the attitude and the on-track movement direction of a spacecraft through integration of several algorithms, so as to complete the autonomous navigation of an orbiting satellite, and output high-precision position, attitude and speed information. The system is suitable for autonomous operation control of orbiting satellites or constellations of the earth or other planets.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a satellite autonomous navigation method which integrates X-ray pulsar radiation vectors and timing observations, and is used for orbiting satellites of the earth or other near-celestial bodies, interstellar navigation spacecraft, or cruising vehicles on the surface of stars without dense atmospheres Provide high-precision autonomous navigation and positioning services. Background technique [0002] Navigation and positioning based on X-ray pulsars is a celestial navigation method that uses X-ray pulsar radiation pulse arrival time measurement as information input, which can provide position, velocity, time, attitude, etc. for near-earth, deep space and interstellar space spacecraft. Rich navigation information. It calculates the displacement of the spacecraft relative to the SSB in the direction of the pulsar by measuring the time difference between the same puls...

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Problems solved by technology

[0005] In view of the above problems, the main purpose of the present invention is to: In the traditional X-ray pulsar navigation method, only the timing observation of pulsar radiation pulse is used as the input of navigation information, resulting in insufficient utilization of pulsar navigation capability and the need to further improve the positioning accuracy of orbiting satellites To solve this problem, provide a satellite autonomous navigation method that integrates pulsar radiation vector and timing observations, so as to make full use of pulsar navigation capabilities, improve pulsar navigation accuracy, and realize autonomous high-precision orbit determination, time synchronization and attitude measurement of orbiting satellites

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