不同分析中心精密产品的比较与分析  

Comparison and analysis of precision products from different analysis centers

作　　者：程贇 来凯 Cheng Yun;Lai Kai(Shanxi Provincial land engineering construction group,Xi’an 710075,China;Fourth geological team of Hubei geological bureau,Xianning 437000,China)

机构地区：[1]陕西省土地工程建设集团,陕西西安710075 [2]湖北省地质局第四地质大队,湖北咸宁437000

出　　处：《矿山测量》2019年第5期35-39,共5页Mine Surveying

摘　　要：针对国际GNSS服务局(International GNSS Service,IGS)不同分析中心卫星轨道和钟差产品之间的差异,利用IGS提供的综合精密产品和不同分析中心的精密产品,比较分析了不同分析中心精密轨道和精密钟差产品的区别。在此基础上,使用同一分析中心的卫星轨道和钟差产品,将IGS综合精密产品的静态精密单点定位(Precise Point Positioning,PPP)单天解作为参考值,基于RTKLIB比较了不同分析中心精密产品PPP单天解相对于IGS PPP单天解的点位分量误差。算例表明:尽管不同分析中心的精密轨道和精密钟差产品存在差异,然而在采用同一分析中心精密产品进行精密单点定位时,其X、Y、Z坐标分量偏差均在mm级,其点位定位误差在[2 mm 8 mm]之间波动,表明了同一分析中心的轨道和钟差产品具有自洽性和一致性。因此,在IGS精密卫星轨道和钟差产品未发布前,用户可以配套使用IGS不同分析中心的卫星轨道和钟差产品来取代IGS最终精密轨道和精密钟差产品,以得到高精度定位结果。According to the different reference frame of satellite orbit and clock error products of IGS(International GNSS Service) analysis centers, the differences between precise orbit products and precise clock error products of different analysis centers were compared and analyzed by using final precise products and precise products respectively provided by IGS and its analysis centers. On this basis, using the same precise orbit and clock error products, taking the static single-day Precise Point Positioning(PPP) results of IGS final products as the reference,the point component error of single-day PPP results of different analysis centers relative to IGS single-day PPP single-day results were compared based on RTKLIB.The simulation shows that although the precise orbit and precise clock error products of different analysis centers are different,when using precise products from the same analysis centers for PPP,the X、Y and Z coordinate components are all in the mm level,The position error fluctuates between [2 mm 8 mm],indicating that the orbit and clock error products of the same analysis centers have self-consistency and consistency. Therefore,before the release of IGS precise orbit and clock error products, uses can use the satellite orbit and clock error products of different analysis centers to replace IGS final precise orbit and clock error products to obtain high-precision positioning results.

关 键 词：分析中心 精密轨道 精密钟差 RTKLIB 精密单点定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]