基于空间成像的卫星光通信双向捕获技术  

Bidirectional Acquisition Technology Based on Space Imaging in Intersatellite Optical Communications

作　　者：武凤[1] 周彦平[1] 于思源[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《光电子．激光》2006年第6期700-704,共5页Journal of Optoelectronics·Laser

摘　　要：分析了目前卫星间光通信中应用较多的双向捕获扫描技术,根据光通信终端和卫星平台的性能情况,给出了基于空间成像的双向扫描捕获适用条件和实施方案。在一定的卫星平台性能条件和捕获概率要求下,当2个终端的单场扫描范围相等时,链路建立过程中捕获系统总的扫描范围最小。通过双向捕获的理论模型,分析了光通信终端和卫星平台参量对双向捕获的影响,建立了双向扫描捕获MonteCarlo计算机仿真实验模型。实验结果表明,采用该设计的捕获方案,当链路卫星平台的姿态控制误差小于0.2°(3σ)时,平均捕获时间小于3 min,捕获概率大于99.5%。The bidirectional acquisition which is widely applied on the intersatellite optical communication systems is studied. Applicability and scenario of the bidirectional acquisition with space imaging are presented according to the performances of the optical terminal and the satellite. Under a certain satellite and acquisition probability, the total scan field of the acquisition system will be the minimum during the foundation of links if the scan fields of the single scan of two terminals are equal. Using a theoretical model of the bidirectional acquisition,the influences of the parameters of the optical terminal and the satellite on the bidirectional acquisition are analyzed. A model of Monte Carlo experiment was made for the bidirectional acquisition. It showed in experimentlly that, with the acquisition scenario in this paper,the average acquisition time will be less than 3 rain and the acquisition probability will be more than 99.5% when the errors from the pose controls of the satellite are under 0.2° （3σ）.

关 键 词：卫星间光通信 空间成像 双向捕获 仿真 捕获概率 捕获时间 

分 类 号：TN929.1[电子电信—通信与信息系统]