| 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。 |
| 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 |
| DOI： |
|
| 基金项目: |
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| Calibration Accuracy Analysis of LEO Dual satellite Geolocation System Based on Reference Stations |
| YAN Hang,YAO Shan-feng |
| (National Defense Key Lab on Blind Signal Processing,Chengdu 610041,China) |
| Abstract: |
| The location error distribution of the LEO(Low Earth Orbit) dua
l-satellite golocation system and the error calibration algorithm ba
sed on reference stations are analysed. Then, the effect of the factors such as DTO(Differential Time Offset) and DFO(Differential Frequency Offset) er
ror 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 con
ducted in this paper reveals the principle of location error calibration based o
n reference station and it provides reference for constructing reference stations in practical systems. |
| Key words: LEO satellite dual-satellite geolocation differential time offset differential frequency offset location error reference station error calibration |
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