空间光通信中GPS辅助快速捕获对准技术

GPS aided fast acquisition and pointing technology for space laser communication

基于GPS坐标解算空间光通信终端初始对准的方位角和俯仰角,实现了信标光的快速捕获对准。给出了GPS坐标解算算法,根据解算得到的角度和自身姿态信息计算二维转台的指向角,以此驱动转台快速指向目标。测试了不同调整角度的初始对准误差和时间。进行了外场捕获对准实验,并对实验数据进行了分析,结果表明该系统可以用于快速建立空间激光通信链路。

In order to solve fast acquisition and pointing of the beacon in laser communication, the paper calculates the optical antenna＇s azimuth and elevation angles of space communication terminals by GPS coordinate. The GPS coordinates is calculated and according to the calculated pointing angles and the attitude information, the system rotates the turntable to point at the destination. The initial pointing error and time under different angles are recorded. A field experiment is carried out and the experimental data are analyzed, results show that it is feasible to realize fast establishment of laser communication link.