基于时差频差的双星无源定位地基差分技术研究  

Research on ground based differential technology in dual satellite passive positioning system basing on time difference of arrival and frequency difference of arrival

作　　者：薛艳荣[1,2] 肖波 李雨薇 刘娅[1,2] 李孝辉 XUE Yan rong;XIAO Bo;LI Yu wei;LIU Ya;LI Xiao hui(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049

出　　处：《时间频率学报》2022年第4期294-300,共7页Journal of Time and Frequency

基　　金：中国科学院青年创新促进会资助项目(2018444);中国科学院“西部之光”人才培养计划“西部青年学者”资助项目(XAB2021YN24)。

摘　　要：为了进一步改善基于到达时间差和到达频率差的双星无源定位系统的定位误差,进而提高系统的定位精度,针对该系统的误差分布规律,给出了双星无源定位差分技术的概念,并分析了该项差分技术和全球卫星导航系统(GNSS)差分技术的区别。给出双星无源定位地基差分方法,即位置差分和伪距差分方法,分析这两种方法的优缺点,研究了两种方法的适用范围。结果表明,利用差分技术对双星无源定位系统的误差修正后,可以改善系统的定位精度,定位精度可由10~20 km提高到优于5 km。In order to improve the positioning error of dual satellite passive positioning system based on the time difference of arrival and frequency difference of arrival,and further improve the positioning accuracy of the system,according to the error distribution law of dual satellite passive positioning system,the concept of dual satellite passive positioning differential technology is given.The difference between this differential technology and GNSS differential technology is analyzed.On this basis,the ground based differential technology of dual satellite passive positioning system,namely the position differential technology and the pseudo range differential technology,is given.The advantages and disadvantages of these two methods are analyzed,and the application scope of the two methods is investigated.The results show that after the error correction of dual satellite passive location system by using differential technology,the positioning accuracy of the system can be improved from 10 to 20 km to better than 5 km.

关 键 词：双星无源定位 到达时间差 到达频率差 定位精度 

分 类 号：TN967.1[电子电信—信号与信息处理]