IGS14地球参考框架更新及其对GPS精密定轨的影响  

Updates of IGS14 terrestrial reference frame and its effect on GPS precise orbit determination

作　　者：席克伟 王小亚[1,2] 张言 李秋霞 XI Kewei;WANG Xiaoya;ZHANG Yan;LI Qiuxia(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai University,Shanghai 200444,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院大学,北京100049 [3]上海大学,上海200444

出　　处：《测绘科学》2020年第8期26-32,40,共8页Science of Surveying and Mapping

基　　金：国家重点研发计划经费资助项目(2016YFB0501405);科技部基础性工作专项项目(2015FY310200);国家自然科学基金面上项目(11173048,10873029);宇航动力学国家重点实验室和上海市空间导航与定位技术重点实验室项目(06DZ22101)。

摘　　要：IGS14地球参考框架发布后,IGS分析中心参考框架已从IGS08转到IGS14,研究框架变化对精密定轨影响变得尤为迫切和重要。为了验证参考框架更新对精密定轨的的影响,该文采用不同的参考框架进行全球定位系统(GPS)精密定轨,并将定轨结果与国际GNSS服务(IGS)分析中心的轨道产品进行对比。实验结果表明,对于GPS卫星,轨道与IGS精密轨道互差均值从32.83 mm变为29.1 mm,重叠弧段均值从29.5 mm变为26.9 mm,更新参考框架后GPS的定轨结果得到提高。相较于IGS08地球参考框架,IGS14地球参考框架在测站位置速度精度、站点震后形变效应的影响和周年半年误差信号等处理上,更加接近测站实际的运动变化过程,有助于提高精密定轨的精度。Since the latest IGS14 terrestrial reference frame was released,International GNSS Service(IGS)analysis centers had been transferred from IGS08 Terrestrial Reference Frames to IGS14 terrestrial reference frames.It is particularly urgent and important to study the impact of frame changes on precise orbit determination.In order to verify the effect of the reference frame updating on precise orbit determination,different reference frames were used for precise orbit determination experiments,and the results of orbit determination were compared with IGS analysis centers.The experimental results showed that for global positioning system(GPS)satellites,the mean differences between orbit and IGS precise orbit was changed from 32.83 mm to 29.1 mm,and the mean value of overlapping were changed from 29.5 mm to 26.9 mm.The orbit determination results of GPS were improved after the conversion of the reference frame.Compared with the IGS08 terrestrial reference frame,the IGS14 terrestrial reference frame was closer to the actual motion change process of the station in terms of the accuracy of the station position velocity,the effect of the site post-seismic-deformation effect,and the annual and semiannual signal processing,which would help to improve the precision of precise orbit determination.

关 键 词：IGS08地球参考框架 IGS14地球参考框架 震后形变模型 GPS精密定轨 

分 类 号：P228.4[天文地球—大地测量学与测量工程]