摘要
模糊度固定对于精密单点定位(Precise Point Positioning)提高定位精度和加快收敛都有重要意义,是精密单点定位研究的重点和热点。GPS和BDS-2现有卫星和非差小数周偏差产品为基础研究提供支持,采用全球IGS(International GNSS Service)跟踪站提供的观测数据,进行静态精密单点定位模糊度固定实验,分别就GPS单系统和GPS+BDS-2双系统进行模糊度固定。实验结果表明,通过UPD(Uncalibrated Phase Delay)改正,GPS和GPS+BDS-2首次固定时间均可达到40 min,与浮点解相比,GPS和GPS+BDS-2的固定解收敛时间分别缩短了25.02%和27.42%。此外,两种固定解的三维位置误差RMS值则分别减小了20.36%和20.71%。
The ambiguity resolution has great significance for improving the accuracy and speeding up convergence of Precision Point Positioning(PPP),which is a research focus and hotspot in the field of PPP.The basic research was supported by the existing satellite and non-difference Uncalibrated Phase Delay(UPD)products of GPS and BDS-2.The global IGS tracking station was used to provide observation data to perform static PPP ambiguity resolution experiments to carry out the ambiguity resolution of GPS single system and GPS+BDS-2 dual system respectively.The experimental results show that the first fixed time of GPS and GPS+BDS-2 can reach 40 min by UPD correction.Comparing with floating point solution,the convergence time of GPS and GPS+BDS-2 fixed solution is reduced respectively by 25.02%and 27.42%.Moreover,the RMS values of 3D position error for two fixed solutions are reduced respectively by 20.36%and 20.71%.
作者
李江伟
姚顽强
贾小林
王棣星
许扬胤
LI Jiangwei;YAO Wanqiang;JIA Xiaolin;WANG Dixing;XU Yangyin(Xi’ an University of Science and Technology, Xi’ an 710054, China;Xi’ an Research Institute of Surveying and Mapping, Xi’ an 710054, China;Chang’ an University, Xi’ an 710061, China;Information Engineering University, Zhengzhou 450001, China)
出处
《测绘科学技术学报》
北大核心
2020年第5期467-473,共7页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41874041)。
