深空光通信中恒星信标的捕获跟踪技术研究  

Acquisition and tracking for star as beacon in deep space optical communication

作　　者：徐科华[1] 韩琦琦[1] 马晶[1] 谭立英[1] 

机构地区：[1]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

出　　处：《光电工程》2006年第11期8-12,共5页Opto-Electronic Engineering

摘　　要：提出一种深空光通信系统的信标捕获、跟踪方案,该方案是以恒星作为信标,根据恒星在惯性坐标系中的绝对位置信息,基于航天器和地球星历表、航天器的姿态信息来进行下行光束瞄准方向的精确控制。理论分析和计算机仿真都表明,星敏感器的测量精度和焦距,下行信号光的束散角将影响激光链路成功建立概率。下行信号光束散角为30μrad,星敏感器视场为8°×8°,焦距为143mm,恒星的中心位置测量精度达到0.10个像素时,链路成功建立的概率达到96.4%,表明该方案是可行的。A method to acquire and track the beacon for deep space optical communication system is proposed, which uses star as beacon, and controls the direction of down beam based on the absolute position in inertial frame, the ephemeris of aircraft and earth and the attitude of aircraft. Theory analysis and computer simulation show that the precision and focus of star tracker, the divergence angle of down beam influence the probability of laser link setting up. When the divergence angle of down beam is 30μrad, the field of view is 8°×8°, the focus is 143mm, and when the error of the center of star is 0.10 pixel, the probability of the laser link setting up will reach 96.4%.

关 键 词：深空光通信 星敏感器 目标捕获 目标跟踪 

分 类 号：TN929.13[电子电信—通信与信息系统]