Ultra-far deep space laser communication capturing and tracking system

Abstract

The invention provides an ultra-far deep space laser communication capturing and tracking system which obtains position information and attitude information through a star sensor and a navigation gyroscope, and obtains solar facula and earth facula positions through a visible light focal plane detector and an infrared focal plane detector. And the spaceborne computer calculates a coarse tracking pointing signal to control the coarse tracking turntable to drive the optical antenna, and calculates a fine tracking error signal to control the deflection direction of a transmission light beam of the electro-optical deflector, so that light beam capture tracking in laser communication from an ultra-far deep space away from the earth by 30-250 astronomical units to the earth is realized. An existing beacon light emitting system is omitted, the weight, the size and the power consumption of a laser communication system are effectively reduced, the star sensor and the navigation gyroscope are combined to obtain attitude and position information, a focal plane detector is used for replacing a common QAPD detector to obtain tracking errors, the capturing and tracking sensitivity and precision are effectively improved, and the tracking precision is improved. The method can be widely applied to ultra-far deep space detectors such as asteroid detectors and solar system marginal detectors.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to an ultra-far and deep-space laser communication capture and tracking system. Background technique [0002] With the development of our country's lunar exploration and Mars exploration, in the future, deep space exploration will continue to carry out in-depth research in the direction of ultra-far deep space exploration such as asteroid detection and solar system edge detection. At present, the radio frequency band is difficult to provide high-speed communication support services for ultra-deep space detector missions, so it is imminent to apply space laser communication technology to ultra-deep space information transmission tasks. [0003] The fast and stable capture and tracking of laser communication beams is the key link and important guarantee for the realization of ultra-far and deep space laser communication. Due to the extremely narrow beam divergence ang...

AI Technical Summary

Problems solved by technology

However, the detector field angle of the capture detection module is small, and the capture and tracking sensitivity is low, so it is impossible to complete the capture and tracking of the beam in the deep space more than 30 astronomical units from the earth.

[0009] Although the above five technologies have realized the capture and tracking of the laser communication system, they have not solved the capture and tracking technology of the laser communication system at a distance of more than 30 astronomical units from the earth, and there are still low measurement accuracy of position and attitude information, capture and tracking. Low sensitivity, complex system composition, poor stability and other problems

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