星地激光通信链路瞄准角度偏差修正及在轨验证

发布时间：2018-02-16 11:32

本文关键词： 光通信星地激光通信光束瞄准偏差坐标变换偏差修正　出处：《中国激光》2014年06期 　论文类型：期刊论文

【摘要】：在我国首次星地激光通信链路地面捕获实验初期,由于激光通信终端地面光机装调和整星安装过程中存在的系统误差,在瞄准过程中存在8mrad的瞄准角度偏差,且平均捕获时间大于40s,严重影响星地光通信链路捕获性能。基于此,利用立方棱镜坐标系为桥梁,建立了基于坐标变换的卫星本体坐标系与终端基准坐标系的修正变换矩阵,通过地面坐标系测量,最终对光束瞄准角度偏差进行了有效补偿。海洋二号卫星在轨实测结果表明,星地激光通信链路的瞄准偏差由最初的8mrad减小为0.8mrad,捕获扫描范围显著缩小,链路平均捕获时间由最初的40s减小到小于5s,明显优于国外同类型终端在轨实验性能,对卫星激光通信链路捕获性能的提高具有重大意义。
[Abstract]:For the first time in China satellite ground laser communication link ground capture at the beginning of the study, there is a systematic error due to ground laser communication terminal machine assembly and the entire star in the installation process, aiming at the existing in the process of 8mrad aiming angle deviation, and average acquisition time is more than 40s, seriously affect the performance of satellite to ground laser communication link. Based on this, using the cubic the prism coordinate transformation matrix correction bridge, established the satellite coordinate system based on the terminal and the reference coordinate system, the ground coordinates measurement, finally on the beam pointing angle deviation of the effective compensation. Ocean No. two satellite on orbit test results show that the satellite to ground laser communication link is reduced from the initial aiming error 8mrad 0.8mrad, captured the scanning range is significantly reduced, the average link acquisition time from 40s reduced to less than 5S, significantly better than the same type of terminal in abroad The experimental performance of rail is of great significance to the improvement of the acquisition performance of the satellite laser communication link.

【作者单位】：哈尔滨工业大学理学院物理系;哈尔滨工业大学可调谐激光技术国家级重点实验室;
【分类号】：TN929.1

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