Navigation satellite autonomous navigation system and method based on X-ray pulsar

Abstract

A autonomous navigation system of a navigational satellite based on X radial pulse satellite includes: an X radial detector, an atomic clock group on the satellite, a planet of our solar system parameter database, an X radial pulsar module and a characteristic parameter database, a computer on the satellite, a strap-down inertial navigation system SINS and an autonomous navigation algorithm module library; in the autonomous navigation method, the X radial photons radiated from the pulsar are used as the input of the external information; the pulse arrival time TOA and the angular position information are obtained; data is processed through a autonomous navigation filter; and the navigational parameters such as the position, the speed, the time and the pose of the navigational satellite; the navigational telegraph text and the control command are generated independently, and the independent running of the navigational satellite is realized. The present invention has the advantages of providing a long time and a high degree of accuracy autonomous navigation, and providing the fault-tolerance capacity of the autonomous navigation information processing. The autonomous navigation system is also be adequate for the high degree of accuracy autonomous navigation of the near earth orbit, the deep space, the interplanetary flight space vehicle, the a celestial body lander without thickset atmosphere and the surface peripatetic machine.

Description

technical field [0001] The invention belongs to the technical field of spacecraft autonomous navigation, and relates to a system and method for high-precision autonomous orbit determination, time synchronization and attitude measurement for navigation satellites using X-ray signals radiated by pulsars; the invention is also applicable to low-earth orbits, High-precision autonomous navigation applications for deep space and interplanetary spacecraft, as well as non-dense atmosphere celestial body landers and their surface rovers. Background technique [0002] The satellite navigation system is a space-based radio navigation positioning and time transfer system. It is a space infrastructure for real-time acquisition of high-precision measurement information. It can provide all-weather, all-time, high-precision Navigation information services such as position, speed and time. A complete satellite navigation system includes three major components, namely the space constellation...

AI Technical Summary

Problems solved by technology

However, from the perspective of practical application effect, this method has not completely solved this technical problem, and cannot meet the requirements of constellation long-term autonomous navigation design indicators; The ranging signal and the modulation of the earth's rotation parameter information are processed on the star to suppress the accumulation of constellation unobservable errors over time

However, this solution by establishing a satellite-ground link violates the principle of long-term autonomous operation of navigation satellites.

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