A Tracking System for Point Targets on Satellite

Abstract

A trajectory tracking system for a point target on a satellite includes a time management unit, a direction control unit and a directing mirror motor mechanism. A ground measurement and control system sends a data packet containing a curvilinear equation multinomial coefficient and starting and finishing time of curve tracking to the time management unit; the time management unit forwards the data packet to the direction control unit, and the direction control unit is controlled to begin to start tracking control calculation; after receiving the data packet and calculating the angles of a pitching direction and a rolling direction of a directing mirror motor, the direction control unit controls the directing mirror motor mechanism; and the directing mirror motor mechanism controls the direction of a directing mirror to adjust an optical axis of a remote sensing camera according to the angles of the pitching direction and the rolling direction. The trajectory tracking system for the point target on the satellite prevents a plurality of angle tracking instructions from being continuously uploaded to the remote sensing camera, and can control the remote sensing camera to complete continuous tracking of the motion trail of the point target only by transmitting time parameters and multinomial coefficient data in the form of a data packet, the communication efficiency is high, and storage pressure of the tracking system is reduced.

Description

technical field [0001] The invention relates to the technical field of optical imaging and remote sensors, in particular to a point target track tracking system on a star. Background technique [0002] The space-borne remote sensing camera uses push-broom or staring methods to image the scene target or track and image the predicted point target when flying with the satellite. There are two traditional point target trajectory tracking systems and methods on the satellite. One is that the ground measurement and control system uploads all position information of the point target trajectory to the satellite. All positions of the target are tracked one by one. This system or method relies on the side swing of the satellite, and its positioning accuracy is also limited by the side swing positioning accuracy of the satellite. To complete the track tracking of the point target, a large amount of position information needs to be uploaded, resulting in upload communication pressure; ...

AI Technical Summary

Problems solved by technology

There are two traditional point target trajectory tracking systems and methods on the satellite. One is that the ground measurement and control system uploads all position information of the point target trajectory to the satellite. All positions of the target are tracked one by one. This system or method relies on the side swing of the satellite, and its positioning accuracy is also limited by the side swing positioning accuracy of the satellite. To complete the track tracking of the point target, a large amount of position information needs to be uploaded, resulting in upload communication pressure; Another method is that the ground measurement and control system uploads the instructions of each position of the pre-stored point target trajectory to the satellite, and the satellite sends these instructions to the camera one by one in time sequence, and the camera realizes the continuous tracking of the point target trajectory according to the sequence of received instructions. This system or method also needs to upload a large amount of instruction data, causing pressure on traditional communication

Images