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.
出处
《电讯技术》
北大核心
2011年第12期27-33,共7页
Telecommunication Engineering
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
LEO satellite
dual - satellite geolocation
differential time offset
differential frequency offset
location error
reference station
error calibration
