智能手机广域差分定位算法研究  

Research on wide area differential corrections algorithm with an android smartphone

作　　者：杨李俊 秘金钟[2] 谷守周[2] 陈秉柱 肖青怀 YANG Lijun;BEI Jinzhong;GU Shouzhou;CHEN Bingzhu;XIAO Qinghuai(Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Beijing Fangshan Satellite Laser Ranging National Observation and Research Station,jing 102488,China;Beijing Urban Construction Survey Design&Research Institute Co.,Ltd.,Beijing 100101,China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]中国测绘科学研究院,北京100036 [3]北京房山人卫激光国家野外科学观测研究站,北京102488 [4]北京城建勘测设计研究院有限责任公司,北京100101

出　　处：《测绘科学》2022年第2期31-38,共8页Science of Surveying and Mapping

基　　金：国家重点研发计划课题项目(2016YFB0501801,2016YFB0502105,2016YFB0502101);全球连续监测评估系统项目(CFZX0301040308-06);中国测绘科学研究院基本科研业务费项目(AR1901);湖南省自然资源调查与监测工程技术研究中心开放课题项目(2020-10)。

摘　　要：针对当前智能手机原始观测数据不稳定导致实时定位精度不高,且未对电离层延迟进行较好修正等问题,该文研究了2类3种不同芯片智能手机多普勒平滑伪距对实时广域差分定位影响,可改善数据质量,提升定位精度;在此基础上对比了广播电离层参数改正、实时电离层产品、电离层格网预测文件3种电离层产品对手机广域差分定位精度的影响。结果表明,多普勒平滑伪距可提升广域差分定位精度,相较于平滑前二维和三维精度分别提升了49.3%、47.8%;其次,3种电离层改正产品均能不同程度改善Mi8、P30、P40平面与高程精度,其中,电离层格网预测文件提升U方向定位精度最为明显,对Mi8的高程提升了31.3%。In terms of current issues of unstable real-time positioning accuracy caused by the current unstable raw observation data of smartphones,and the lack of better correction of ionospheric delay.In this paper,the influence of Doppler smoothing pseudorange on real-time wide-area differential positioning of smart phones with 2 types and 3 kinds of different chips is studied,which can improve data quality and positioning accuracy;On this basis,the effects of broadcast ionospheric parameter correction,real-time ionospheric products and ionospheric grid prediction file on the accuracy of wide-area differential positioning of smartphones are compared.The results show that the Doppler smoothing pseudorange can improve the accuracy of wide-area differential positioning,and the 2 D and 3 D accuracy are improved by 49.3% and 47.8%,respectively,compared with that before smoothing;secondly,the three ionospheric correction products can improve the horizontal and vertical position accuracy of MI8,P30 and P40 to varying degrees.Among them,the ionospheric grid prediction file improves the positioning accuracy of U direction most obviously,which improves the elevation of MI8 by 31.3%.

关 键 词：智能手机 实时 多普勒平滑 广域差分 电离层改正 

分 类 号：P228[天文地球—大地测量学与测量工程]