基于参考站的低轨双星定位误差校正分析  

Calibration Accuracy Analysis of LEO Dual-satellite Geolocation System Based on Reference Stations

作　　者：严航 姚山峰 

机构地区：[1]盲信号处理国防科技重点实验室,成都610041

出　　处：《电讯技术》2011年第12期27-33,共7页Telecommunication Engineering

摘　　要：分析了低轨双星时/频差定位体制中的定位误差分布情况,研究了基于参考站的误差校正算法,最后分析了参考信号时/频差测量误差、参考站站址误差以及参考站位置等因素对定位误差的影响,并对不同条件下参考站对定位误差的校正作用开展了计算机仿真试验。该研究从数学上揭示了参考站对系统定位误差的校正原理,可为实际系统中参考站的建设提供理论依据。The location error distribution of the LEO（ Low Earth Orbit） dual-satellite golocation system and the error calibration algorithm based on reference stations are analysed. Then, the effect of the factors such as DTO （Differential Time Offset ） and DFO（Differential Frequency Offset） error of reference signal, reference station＇s position error and position on location accuracy is discussed. The simulation result under different conditions is given. The research conducted in this paper reveals the principle of location error calibration based on reference station and it provides reference for constructing reference stations in practical systems.

关 键 词：低轨卫星 双星定位 时差 频差 定位误差 参考站 误差校正 

分 类 号：TN971[电子电信—信号与信息处理]