基于不同模糊度固定产品的PPP-AR定位性能评估  

Performance Assessment of Precise Point Positioning with Ambiguity Resolution Using Different Products

作　　者：宋开放 乔书波[1] 肖国锐[1,2] 李明 魏浩鹏[1] 肖正阳 SONG Kaifang;QIAO Shubo;XIAO Guorui;LI Ming;WEI Haopeng;XIAO Zhengyang(School of Surveying and Mapping,Information Engineering University,Zhengzhou 450001,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州市450001 [2]中国测绘科学研究院,北京市100036

出　　处：《大地测量与地球动力学》2024年第10期997-1002,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(42074010,42274045);河南省自然科学基金(232300421105);中国博士后科学基金(2023M733285)。

摘　　要：基于CODE、GFZ、CNES、武汉大学PRIDE实验室和内部估计的模糊度固定产品,从收敛时间、首次固定时间及定位精度等方面进行PPP-AR固定性能的研究。实验选用2022年40个IGS测站7 d的观测数据和各模糊度固定产品配套使用的精密产品,结果表明,在置信度为95%的静态解算模式下,5种产品在解算时间为1 h时固定解较浮点解定位精度提升最明显,分别提升46.58%(3.4 cm)、41.10%(3.0 cm)、45.21%(3.3 cm)、34.25%(2.5 cm)和41.10%(3.0 cm)。仿动态解算模式下,5种产品E、N方向的定位精度都能达到mm级,U方向较浮点解精度提升较小,其中使用GBM产品的精度提升最小,E、N、U方向分别提高72.73%(2.4 cm)、47.37%(0.9 cm)、5.41%(0.2 cm);提升效果较好的是WUM和COM产品,分别为81.82%(2.7 cm)、63.16%(1.2 cm)、24.32%(1.1 cm)和81.82%(2.7 cm)、63.16%(1.2 cm)、15.58%(0.8 cm)。This paper is based on the AR products from CODE,GFZ,CNES,PRIDE Lab,and in-house AR products for the performance assessment of PPP-AR in terms of convergence time,time to first fix and positioning accuracy.The experiment uses seven-day observation data from 40 IGS stations in 2022 and precise products of each AR product.The results show that under the static solution mode with confidence level of 95%,five products have the most obvious improvement in positioning accuracy at the time of 1 h,which are 46.58%(3.4 cm),41.10%(3.0 cm),45.21%(3.3 cm),34.25%(2.5 cm),and 41.10%(3.0 cm),respectively.In the simulation-kinematic solution mode,the positioning accuracy of the five products in the E and N directions can reach the millimeter level,and the accuracy of the U direction is slightly improved than that of the floating point solution,among which the accuracy of GBM product is the least improved,and 72.73%(2.4 cm),47.37%(0.9 cm) and 5.41%(0.2 cm) were increased in E,N and U directions.WUM and COM products had better improvement effect.They were 81.82%(2.7 cm),63.16%(1.2 cm),24.32%(1.1 cm) and 81.82%(2.7 cm),63.16%(1.2 cm),15.58%(0.8 cm).

关 键 词：精密单点定位 模糊度固定 相位小数偏差 整数钟 观测值偏差 

分 类 号：P228[天文地球—大地测量学与测量工程]