BDS静态精密单点定位模糊度固定解精度分析  

Accuracy analysis of BDS static precise point positioning with ambiguity resolution

作　　者：徐宗秋[1] 丁新展 徐彦田[2] 唐龙江[1] 李磊[1] 胡艳阳 XU Zongqiu;DING Xinzhan;XU Yantian;TANG Longjiang;LI Lei;HU Yanyang(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100036

出　　处：《测绘科学》2019年第7期30-34,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41504030);辽宁省博士启动基金项目(201501126)

摘　　要：针对BDS单系统未校准相位延迟(UPD)估计以及不同时长精密单点定位(PPP)模糊度固定对定位精度影响的问题,该文选取56个测站估计UPD,利用未参与UPD计算的8个测站进行不同时长BDS静态PPP模糊度固定实验。结果表明:BDS星间单差宽巷和窄巷UPD在连续时段内具有一定的稳定性,其估计精度满足用于PPP模糊度固定要求。时长越短模糊度固定率越低。以IGS周解为参考值,不同时长模糊度固定解较浮点解三维定位精度均提高12%以上,时长越短模糊度固定解精度提高越显著。因此,模糊度固定是提高BDSPPP定位精度的重要手段。Aiming at the problem of uncalibrated phase delays(UPD)estimation of BDS single system and the influence of PPP ambiguity resolution(AR)on positioning at different periods,this paper selected56 stations to estimate UPD,and 8 stations not involved in UPD calculation were used to conduct different periods static PPP AR.The results showed that BDS wide lane and narrow lane UPDs were stable for a continuous period of time,and theirs estimated accuracy could satisfy the requirements for PPP AR.As the periods became shorter,the rate of ambiguity resolution was lower.Compared to the float solutions,the accuracy improvement of the three-dimensional positioning by PPP AR at different periods was more than 12% with respect to the IGS weekly solutions,and the more significant accuracy improvement could be obtained at the shorter periods.Therefore,AR is an important means to improve the BDS PPP accuracy.

关 键 词：北斗卫星导航系统 精密单点定位 未校准相位延迟 模糊度固定 

分 类 号：P228.4[天文地球—大地测量学与测量工程]