辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(2)：138-145,8.DOI:10.11956/j.issn.1008-0562.20240118
甘肃省BDS PPP精度分析及在地震位移监测中的应用
The accuracy analysis of BDS PPP in Gansu Province and application in monitoring earthquake displacement
摘要
Abstract
To researth the performance of the BeiDou navigation satellite system(BDS)precise point positioning(PPP)in Gansu Province,a precision analysis method for single BeiDou and BeiDou-inclusive multi-system combinations is proposed.The feasibility of using BDS to monitor displacement of continuous operating reference stations(CORS)during earthquakes is also analyzed.Based on multi-frequency,multi-mode observation data from the BeiDou satellite navigation reference station network in Gansu Province,and incorporating a phase bias correction model,the ambiguity resolution(AR)algorithm for ionosphere-free combination is applied.The positioning results are evaluated from multiple aspects such as positioning accuracy,satellite spatial distribution,and position dilution of precision(PDOP).Static and dynamic PPP-AR calculations are used to compute the displacement variation at the LXJS station in the epicenter of the Jishishan earthquake in Linxia.The results show that the BDS-3(B3)positioning accuracy for single BeiDou is superior to B2/B3 and B2.The multi-system combination GPS/GLONASS/Galileo/BDS-3(G/R/E/B3)outperforms G/R/E/B2/B3 and G/R/E/B2.The multi-system combination G/R/E/B3 provides better results than single B3,with an improvement of at least 40%in the Up-direction positioning accuracy.Because B2 is affected by factors such as uneven distribution of space satellites,large satellite orbit and clock error,the PDOP value of single Beidou B2/B3 and multi-system combination G/R/E/B2/B3 decreases and the positioning accuracy decreases.The research conclusions provide a reference for millimeter-scale seismic displacement monitoring.关键词
北斗导航卫星系统/模糊度固定/多系统组合/无电离层组合/定位精度Key words
BeiDou navigation satellite system(BDS)/ambiguity resolution(AR)/multi-system combination/ionosphere-free combination/positioning accuracy分类
测绘与仪器引用本文复制引用
赵亮,杨南南,徐爱功..甘肃省BDS PPP精度分析及在地震位移监测中的应用[J].辽宁工程技术大学学报（自然科学版）,2025,44(2):138-145,8.基金项目
甘肃省自然资源厅科技创新项目(202217) （202217）
