基于北斗单系统观测数据的北斗坐标系对齐ITRF精度评估  

Accuracy Evaluation of Aligning BeiDou Coordinate System to ITRF2014 Based on BeiDou Observations

作　　者：曲伟菁[1] 刘利 周善石[1] 徐君毅 杨宇飞 胡小工[1] 郭睿 董明 吴斌[1] 唐成盼[1] 李晓杰 刘帅 QU Wei-jing;LIU Li;ZHOU Shan-shi;XU Jun-yi;YANG Yu-fei;HU Xiao-gong;GUO Rui;WU Bin;DONG Ming;TAND Cheng-pan;LI Xiao-jie;LIU Shu-ai(Shanghai Astronomical Observatory,Chinese Academy of Science,Shanghai 200030,China;Beijing Satellite Navigation Center,Beijing 100092,China;Beijing Institute of Tracking and T-elecommunication Technology,Beijing 100094,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]北京卫星导航中心,北京100092 [3]北京跟踪与通信技术研究所,北京100094

出　　处：《天文学进展》2022年第3期396-415,共20页Progress In Astronomy

基　　金：国家自然基金面上项目(12173072)。

摘　　要：采用2019年10月至2020年3月北斗观测数据获得单天台站坐标,实现BDCS并与ITRF2014对齐。利用单GPS观测数据的解算台站坐标和IGS提供的台站坐标对BDS观测数据解算结果进行精度评估,比较结果表明,采用BDS数据解算的台站坐标与IGS提供单天台站坐标差异的RMS均值小于1 cm,与单GPS数据解算台站坐标差异的RMS均值小于1.5 cm。用BDS数据解算台站坐标时间序列弥散度偏大,并对其原因进行了初步的分析。同时采用GPS观测数据初步估计中国区域监测站速度场,随着日后北斗导航系统的稳定运行以及北斗观测数据的累积,有望获得更高精度的台站坐标和速度及BDCS向ITRF的对齐。Based on GPS observations,the BeiDou coordinate system(BDCS)(2019v01)aligned to ITRF2014 was released in December 2019 and the alignment accuracy is at millimeter level.With the continuous accumulation of BeiDou Satellite Navigation System(BDS)observations,it should be used to the alignment and maintenance of BDCS.In this paper,we align BDCS to ITRF2014 using BDS observations from October 1,2019 to March 19,2020.The daily station coordinates obtained by using GPS observations from global distribution stations and that from the International GPS Service(IGS)from January 1,2019 to April 19,2020 are used to evaluate the accuracy of the station coordinates estimated by using BDS observations.The average root-mean-square(RMS)of the daily IGS station coordinate differences between using BDS observations and from IGS analysis center is less than 1 cm.The average RMS of the daily station coordinate differences between using GPS and BDS observations is less than 1.5 cm.The scatter of station coordinates solutions using BDS observation is relatively large,which is preliminary explained in this paper.The velocities of the regional monitoring stations are estimated using GPS observations of 470 days.With the stable operation of BDS and continued accumulation of BDS observations,we expect to obtain higher accuracy of station coordinates,velocity,and the alignment to ITRF.

关 键 词：北斗导航系统 北斗坐标系 地球参考框架 

分 类 号：P228[天文地球—大地测量学与测量工程] P128.4[天文地球—测绘科学与技术]