干涉测量宽带相关处理算法与验证

Interferometry Measurement Broadband Correlation Processing Algorithm and Verification

阐述了一种用于航天器精确角位置测量的干涉测量宽带相关信号处理算法,通过仿真验证了算法的有效性,并搭建卫星干涉测量实验系统,采集某地球同步卫星信号进行宽带相关信号处理,获得清晰干涉条纹,准确估计出反映测站与卫星位置关系的时延观测量。结果表明宽带相关信号处理的估计时延与卫星信号链路标定时延、测距时延组成系统时延闭合回路,初步验证了干涉测量实验系统的有效性,为后续飞行任务中航天器高精度干涉测量积累了技术和经验。

A broadband correlation signal processing algorithm is introduced for interferometry measurement of the angular position of spacecraft.The performance of the algorithm is validated through simulation.An interferometry measurement experiment system is established to sample geosynchronous satellite signals to obtain clear interferometry fringes and evaluate delay information corresponding to the angular position between the observation stations and an observed spacecraft.Experiment results show that interferometry fringes are obtained and broadband delay,link delay and range delay constitute a closed loop of system delay,giving a preliminary confirmation of the validity of the interferometry measurement system.