单/双站辅助的干涉仪标校与选站方法  

Calibration and Emitters Selection Method of Interferometer Based on Single or Double Emitters

作　　者：宋逸豪 黄普明[1] 刘波[1] 冯雪峰 李帅 张千 Song Yihao;Huang Puming;Liu Bo;Feng Xuefeng;Li Shuai;Zhang Qian(Institute of Telecommunication and Navigation Satellites,CAST,Beijing 100094,China)

机构地区：[1]中国空间技术研究院通信与导航卫星总体部,北京100094

出　　处：《航空兵器》2024年第1期122-127,共6页Aero Weaponry

基　　金：国家重点研发计划项目(2022YFB2902700);中国航天科技集团有限公司钱学森青年创新基金。

摘　　要：传统的固定基线干涉仪多误差联合标校方法需要三个以上的标校站才能实现干涉仪的在轨实时标校,但是在标校站数量不足时传统方法性能将降低甚至失效。针对标校站数量不足的情况,本文提出一种固定基线干涉仪单/双站标校算法。在干涉仪与标校站之间存在相对运动的条件下,首先通过多次测量获得一组标校信号相位差,其次利用所得相位差列出关于干涉仪各项系统误差的方程组,最后使用Penrose逆矩阵辅助的迭代最小二乘法求解出各项系统误差值。仿真结果验证了所提算法的可行性。在此基础上,针对标校站选址对标校后干涉仪定位性能影响的问题,分解标校站选址的各项指标,通过数值仿真的方式,定性分析了标校站选址的各个参数对干涉仪定位精度的影响。分析结果表明,单站情况下位于星下点附近的标校站或双站情况下相距较远的两个标校站均能让标校后的干涉仪获得更优的定位性能。The traditional method of joint calibration of fixed baseline interferometer with multiple errors requires more than three calibration emitters to achieve real-time calibration of the interferometer in orbit,but the performance of the traditional method will be reduced or even failed when the number of calibration emitters is insufficient.For the situation that the number of calibration emitters is insufficient,a single or double emitters calibration method for fixed baseline interferometer is proposed.Under the condition of relative motion between the interferometer and the calibration emitters,a set of phase differences of calibration signals is obtained firstly by multiple measurements,and a set of equations about the systematic errors of the interferometer is listed by using the obtained phase differences,finally the systematic errors are solved by the Penrose inverse matrix assisted iterative least squares method.The simulation results verify the feasibility of the proposed method.On this basis,the influence of the emitter selection on the positioning performance of the interferometer after calibration is analyzed qualitatively by means of numerical simulation,decomposing the parameters of the emitter selection.The analysis results show that the calibration emitter located near the sub-star in the single emitter case or two calibration emitters located far apart both can make the interferometer obtain better positioning performance after calibration.

关 键 词：干涉仪 标校 系统误差 单站 双站 

分 类 号：TJ760[兵器科学与技术—武器系统与运用工程] TN971[电子电信—信号与信息处理]