应用原子鉴频技术的低轨卫星实时视向速度测量方案  

Real-time Apparent Velocity Measurement Scheme for LEO Satellite Using Atomic Frequency Discrimination Technology

作　　者：叶晖 张伟[2] 李发泉[1] 杨勇 陈晓 郑永艾[2] 陈阳 舒适[2] YE Hui;ZHANG Wei;LI Faquan;YANG Yong;CHEN Xiao;ZHENG Yongai;CHEN Yang;SHU Shi(Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院精密测量科学与技术创新研究院,武汉430071 [2]上海卫星工程研究所,上海201109 [3]中国科学院大学,北京100049

出　　处：《航天器工程》2020年第5期38-46,共9页Spacecraft Engineering

摘　　要：现有的低轨卫星实时定轨方法由于存在GPS时钟差误差,以及GPS接收机所使用的广播星历精度不高和星上处理器性能有限等原因,实时定轨的精度不理想。针对上述问题,文章提出一种应用原子鉴频技术的低轨卫星实时视向速度测量方案。该方案通过地面激光发射端发送激光信号,再由卫星信号接收端接收并测量的方法,实现低轨卫星相对地面某点的视向速度测量。在现有卫星实时定轨算法的基础上,加入通过文章方案得到的卫星实时视向速度数据进行仿真,结果表明:在1 mm/s的实时视向速度测量精度下,卫星实时定位精度可提升10%,定速精度可提升17%。应用原子鉴频技术的低轨卫星实时视向速度测量方案,可有效提高卫星的实时定轨精度。Due to the existence of GPS clock error,the low precision of broadcast ephemeris used by GPS receiver and the effective performance of on-board processor,the existing real-time orbit determination methods for LEO satellites are not accurate enough.A real-time velocity measurement scheme for LEO satellite is proposed using atomic frequency discrimination technology.The laser signal is transmitted through the ground,and then the signal is received and measured by satellite.The visual velocity of LEO satellite relative to the ground can be measured.When the data by this scheme are added into the satellite real-time orbit determination algorithm,the simulation results show that the real-time positioning accuracy and the fixed speed accuracy of the satellite can be improved by 10%and 17%respectively under the real-time direction velocity accuracy of 1mm/s.Therefore,the real-time orbit determination accuracy of LEO satellites can be effectively improved by using atomic frequency discrimination technology.

关 键 词：低轨卫星 原子鉴频技术 实时视向速度 定轨精度 

分 类 号：V412.41[航空宇航科学与技术—航空宇航推进理论与工程]