PPP-RTK服务端卫星钟差估值性能分析  

Performance Analysis of Satellite Clock Offset Generated by PPP-RTK Server End

作　　者：陈永昌 马广庆[2] 张京奎 盛传贞[1] CHEN Yongchang;MA Guangqing;ZHANG Jingkui;SHENG Chuanzhen(CETC 54th Research Institute,State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang,Hebei 050002,China;Hebei Earthquake Agency,Shijiazhuang,Hebei 050002,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050002 [2]河北省地震局,河北石家庄050021

出　　处：《数据与计算发展前沿》2022年第4期81-87,共7页Frontiers of Data & Computing

基　　金：河北省重点研发计划项目“融合北斗PPP-RTK与微惯性传感器的地震位移实时智能监测技术及设备研发和示范应用”(21375411D);中国电子科技集团公司技术创新基金“天地协同PNT网络关键技术研究”(BAX20684X010);中央引导地方资金项目“北斗+低轨全球瞬时高精度定位终端关键技术研究”(206Z0303G)。

摘　　要：【目的】针对实时动态精密单点定位(precise point positioning-real-time kinematic,PPP-RTK)技术几何固定模型解算的卫星钟差的性能,开展相关实验,评估此类卫星钟差估值在传统GNSS应用中的能力水平。【方法】通过将解算的钟差与国际GNSS服务(international GNSS service,IGS)精密钟差进行比较,并将其应用于动态精密单点定位(precise point positioning,PPP),以评估钟差估值的性能。【结果】评估了该模型逐历元策略解算的卫星钟差精度,证实其能够满足传统GNSS应用亚米级精度的增强信息需求。【结论】PPP-RTK作为一项新的高精度定位技术,其服务端能够提供丰富的增强信息。卫星钟差作为该技术几何固定模型提供的增强信息之一,不仅能够服务于PPP-RTK的用户端,而且能够兼容传统需要卫星钟差的应用。[Objective]Aiming at the performance of the satellite clock offset calculated by precise point positioning-real-time kinematic(PPP-RTK)geometry-fixed model,relevant experiments were carried out to test the capability level of satellite clock offset estimates in traditional GNSS applications.[Methods]The performance of clock offset estimates is evaluated by comparing the solved clock offsets with the international GNSS service(IGS)precise clock products and applying it to kinematic precise point positioning(PPP).[Results]The accuracy of the satellite clock offsets calculated by the epoch-by-epoch strategy of the geometry-fixed model is evaluated,and it is verified that the accuracy can meet the enhanced information requirements of sub-meter-level accuracy of traditional GNSS applications.[Conclusions]PPP-RTK is a new high-precision positioning technology,and it can provide various augmented information.As one of the augmented information generated by the geometry-fixed model of this technology,the satellite clock offset can not only serve the end-user of PPP-RTK but also be compatible with traditional applications that require satellite clock offset.

关 键 词：GNSS 卫星钟差 PPP-RTK 精密单点定位 几何固定模型 

分 类 号：P228.4[天文地球—大地测量学与测量工程]