双差/非差解算模式对定位精度的影响分析  

Influence analysis of double differential and un-differential calculating mode on positioning accuracy

作　　者：吴波[1] 党亚民[2] 杨强[2] 宋传峰[2] 王丹萍 WU Bo DANG Yamin YANG Qiang SONG Chuanfeng WANG Danping(Jiangsu Province Surveying ＆ Mapping Engineering Institute, Nanjing, Jiangsu 210013, China Chinese Academy of Surveying and Mapping, Beijing 100830, China Jiangsu Province Suce Information Technology Co. , Ltd, Nanjing, Jiangsu 211111, China)

机构地区：[1]江苏省测绘工程院,江苏南京210013 [2]中国测绘科学研究院,北京100830 [3]江苏省苏测信息科技有限公司,江苏南京21111

出　　处：《导航定位学报》2016年第4期100-103,共4页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41474011);中国测绘科学研究院科研业务费支持项目(7771502;7771405)

摘　　要：针对目前高精度数据处理中双差网解与非差PPP解2种解算模式间精度差异的问题,进行了相同的观测数据在上述2种解算模式下的定位精度分析：首先分别阐述了双差非差数学模型,然后使用地中海周边若干IGS站观测数据进行实验。结果表明：双差、非差解坐标分量差值在1~2cm左右;双差、非差解算模式下,基线较短时基线长度差异较小,最大约为1cm;随着基线长度的增加,基线长度差异表现出明显的累积性;综合比较坐标分量和基线长度差异可知,双差解算模式适用于精度要求较高的国家CORS网数据处理,非差处理模式适用于精度相对较低的省级CORS站框架维护。Aiming at the problem of the precision difference between double differential network solution mode and un-dif- ferential PPP solution mode in high precision data processing, the paper analyzed the positioning accuracy of the same observa- tion data with above-mentioned two modes： the mathematical models of the two modes were elaborated, and an experiment was conducted by using the data of IGS stations around Mediterranean Sea finally. Result showed that the coordinate component difference between the two modes would be about 1~2 cm; when the baseline was short, the baseline length difference in a- bove two modes would be small, the biggest could be about 1 cm, and with the increase of baseline length, the length of base- line differences would show obvious cumulativity; through synthetically comparing between the coordinate components and the baseline length difference, it could be indicated that double differential mode woaald apply to national CORS net data processing under requirement of high precision, while undifferential mode would be suitable for provincial CORS framework maintenance with the requirement of comparatively low precision.

关 键 词：双差模式 非差模式 定位精度 基线 

分 类 号：P228[天文地球—大地测量学与测量工程]