摘要
针对不同构型的低轨星座(LEO)增强北斗卫星导航系统BDS的精密单点定位PPP性能开展研究。通过IGS高、中、低纬度6测站实测数据、精密轨道及钟差产品,生成BDS、“鸿雁”HY、“微厘空间”CS精密星历、卫星钟差、观测量等实验仿真数据,构建了LEO增强BDS PPP数学模型,实现了BDS、BDS+HY、BDS+CS、BDS+HY+CS不同组合PPP。实验结果表明,在10、60 min静态PPP定位精度以及平均可视卫星数、PDOP值等方面均有不同程度的提升,HY对高纬度KIRU站改善效果显著,收敛时间减至2 min以内,CS对低纬度FAA1站测站收敛时间的提升最大,从46 min 50 s缩短至2 min,HY+CS增强BDS的效果最好,10 min定位精度均能达到毫米级,除FAA1站外其他测站均收敛在1 min以内。
The performance of precision point position(PPP)of Beidou Navigation Satellite System(BDS)enhanced with different configurations of low orbit constellation(LEO)is studied in this paper.Based on measured data,precision orbit and clock error products of IGS 6 stations at high,medium and low latitudes,the experimental simulation data of BDS,“Hongyan(HY)”and“Centrispace(CS)”precision ephemeris,satellite clock error and observations are generated,and the LEO enhancing BDS PPP mathematical model is constructed to realize different combination PPP of BDS,BDS+HY,BDS+CS and BDS+HY+CS.The results show that the positioning accuracies of 10 minutes and 60 minutes static PPP,the average number of visible satellites and PDOP value are improved to a certian extent for enhancing BDS.The high latitude KIRU station is enhanced significantly by HY,and the convergence time is reduced within 2 minutes.The convergence time of low latitude FAA1 station is increased to the maximum by CS,which is shortened from 46 minutes 50 seconds to 2 minutes.The best improvement effect on BDS is HY+CS,the accuracy in 10 minutes is reached millimeter level,and all stations except FAA1 station are converged within 1 minute.
作者
刘婧
郝金明
杨颜
周蕊
谢建涛
焦博
LIU Jing;HAO Jinming;YANG Yan;ZHOU Rui;XIE Jiantao;JIAO Bo(Information Engineering University,Zhengzhou 450001,China;School of Geodesy and Geomatics Wuhan University,Wuhan 430079,China)
出处
《测绘科学技术学报》
2024年第5期464-469,共6页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41804035)
军队“双重”建设项目(2021ky023)。
关键词
低轨卫星导航增强
北斗卫星导航系统
精密单点定位
定位精度
收敛时间
LEO satellite navigation enhancement
Beidou navigation satellite system
precise point positioning
positioning accuracy
convergence time
