联合历元间差分相位和GRAPHIC组合的定位方法  

Positioning method using epoch-differenced phase and GRAPHIC observation

作　　者：杨武召 阮仁桂[2] 孙中苗[2,3] 刘宁 李鼎[1] YANG Wuzhao;RUAN Rengui;SUN Zhongmiao;LIU Ning;LI Ding(School of Geology Engineering and Surveying,Chang’an University,Xi’an,710054,China;Xi’an Research Institute of Surveying and Mapping,Xi’an,710054,China;State Key Laboratory of Geo-Information Engineering,Xi’an,710054,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]西安测绘研究所,西安710054 [3]地理信息工程国家重点实验室,西安710054

出　　处：《导航定位学报》2020年第2期18-25,共8页Journal of Navigation and Positioning

摘　　要：为了进一步研究通用航空及无人机产业中低成本、小型化及实时性导航的解决方案,提出1种基于历元间差分相位和非差半合组合观测量(GRAPHIC)的单频单点定位方法,该方法不需要外部的星历、钟差或电离层改正信息,可用于实时导航。采用国际全球卫星导航定位系统服务组织(IGS)观测站数据对该方法进行验证,结果表明:滤波收敛之后,单频定位结果在E、N及U方向的精度(RMS)分别达到0.54、0.35及0.71 m,3维位置精度达到0.96 m,与传统的单频伪距单点定位结果相比,分别提高了6.14%,56.43%,73.3%,也显著优于双频伪距单点定位的精度。In order to further study on the low-cost, miniaturized and real-time navigation solutions in the industry of general aviation and unmanned aerial vehicle, the paper proposed a single-frequency and single-point positioning method based on differential phase between epochs and group and phase ionospheric correction(GRAPHIC), which could be used in real-time navigation without the information of additional corrections for ephemeris, clocks or ionospheric delays. Finally the method was validated by IGS observatory data, and result showed that: after convergence, the RMS of single-frequency positioning in the E, N and U directions could be 0.54, 0.35 and 0.71 m, respectively, and the accuracy of the three-dimensional position could reach 0.96 m, which means that the results would be improved by 6.14 %, 56.43 %, and 73.3 %, respectively, comparing with those of traditional single-frequency pseudo-range point positioning;furthermore, the results could be significantly better than those of dual-frequency pseudo-range point positioning.

关 键 词：单频 历元差分 单点定位 非差半合组合观测量(GRAPHIC) 精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]