全球定位系统2026，Vol.51Issue(3)：54-63,10.DOI:10.12265/j.gnss.2025172
北斗GRAPHIC单频PPP全球时空特性分析与评估
Analysis and evaluation of global spatial-temporal characteristics of BDS GRAPHIC single-frequency precise point positioning
摘要
Abstract
With the widespread adoption of low-cost BeiDou Navigation Satellite System(BDS)application,the group and phase ionospheric calibration(GRAPHIC)single-frequency precise point positioning(PPP)model can provide decimeter-level positioning results,which provides an effective solution for high-precision location services for low-cost single-frequency devices.In order to analyze the difference of positioning performance of single BDS GRAPHIC single-frequency PPP in different regions of the world and in different ionospheric active periods,this paper comprehensively analyzed the spatial-temporal characteristics of the model in low,middle and high latitude region and ionospheric quiet and active periods,during the test period,by using the data of 50 Multi-GNSS Experiment(MGEX)stations evenly distributed.In the analysis of spatial characteristics,the positioning accuracy of BDS GRAPHIC single-frequency PPP is the best in the mid-latitude region(about 0.6 m),the worst in the low-latitude region(about 1.0 m),and in the high-latitude region,it shows good in the north and bad in the south;In the analysis of temporal characteristics,the positioning accuracy of BDS GRAPHIC single-frequency PPP is not much different between ionospheric quiet period and active period,only about 7 cm;In terms of convergence,the horizontal convergence speed is not significantly affected by the ionospheric activity,but the elevation direction converges faster in the ionospheric quiet period,especially in the high latitude region.关键词
精密单点定位(PPP)/北斗卫星导航系统(BDS)/单频/定位精度/收敛性Key words
precise point positioning(PPP)/BeiDou Navigation Satellite System(BDS)/single frequency/positioning accuracy/convergence分类
天文与地球科学引用本文复制引用
张浩伟,王阿昊,万尚尚,颜语彦,李静,徐一航,田润琪..北斗GRAPHIC单频PPP全球时空特性分析与评估[J].全球定位系统,2026,51(3):54-63,10.基金项目
鄂尔多斯市科技重大专项(ZD20232304) （ZD20232304）
国家自然科学基金(42304023) （42304023）
中国矿业大学(北京)大学生创新训练项目(202402002) （北京）
