星地激光通信链路瞄准角度偏差修正及在轨验证

武凤; 于思源; 马仲甜; 马晶; 谭立英

doi:doi:10.3788/cjl201441.0605008

中国激光, 2014, 41 (6): 0605008, 网络出版: 2014-04-29

星地激光通信链路瞄准角度偏差修正及在轨验证

Correction of Pointing Angle Deviation and In-Orbit Validation in Satellite-Ground Laser Communication Links

论文大纲

武凤 ^1,*于思源 ²马仲甜 ²马晶 ²谭立英 ²

作者单位

¹ 哈尔滨工业大学理学院物理系, 黑龙江哈尔滨 150001

² 哈尔滨工业大学可调谐激光技术国家级重点实验室, 黑龙江哈尔滨 150001

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8 mrad的瞄准角度偏差，且平均捕获时间大于40 s，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8 mrad减小为0.8 mrad，捕获扫描范围显著缩小，链路平均捕获时间由最初的40 s减小到小于5 s，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 satellite-ground laser communication links of China, beam pointing deviations are existed due to the coordinate system pointing errors of terminal adjustment and installation. The pointing angle deviation is 8 mrad and the acquisition time is larger than 40 s, which have a serious effect on the acquisition performance. Based on that, the transformation matrix between the satellite coordinate system and the terminal coordinate system is given based on the cubic mirror correction system. At last the correction angles are obtained and the correction of pointing brought by ground station is made. The in-orbit test results of haiyang-2 (HY-2) show that the pointing angle deviation between terminal and ground situation decreases from 8 mrad to 0.8 mrad, the scan area is decreased and the acquisition time of optical communication terminal decreases from 40 s to less than 5 s. The in-orbit experimental results show that this method can be accurate to compensate on the pointing deviations than that of other countries, revising the results to meet the requirements of the laser communications link established.

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武凤, 于思源, 马仲甜, 马晶, 谭立英. 星地激光通信链路瞄准角度偏差修正及在轨验证[J]. 中国激光, 2014, 41(6): 0605008. Wu Feng, Yu Siyuan, Ma Zhongtian, Ma Jing, Tan Liying. Correction of Pointing Angle Deviation and In-Orbit Validation in Satellite-Ground Laser Communication Links[J]. Chinese Journal of Lasers, 2014, 41(6): 0605008.

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