基于CONT观测资料解算地球自转参数精度分析  

Accuracy Analysis of Estimating Earth Rotation Parameters Based on CONT Campaigns

作　　者：俞克豪 沈彤晖 李丽华[1] 宋旭 史浩伟 YU Kehao;SHEN Tonghui;LI Lihua;SONG Xu;SHI Haowei(School of Land Science and Technology,China University of Geosciences,29 Xueyuan Road,Beijing 100083,China;School of Geographic Information and Tourism,Chuzhou University,1 West-Huifeng Road,Chuzhou 239000,China)

机构地区：[1]中国地质大学(北京)土地科学技术学院,北京市100083 [2]滁州学院地理信息与旅游学院,安徽省滁州市239000

出　　处：《大地测量与地球动力学》2023年第9期986-990,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41574011,42174026);中国地质大学(北京)研究生创新基金(ZD2023YC055)。

摘　　要：为比较不同时段和不同技术解算地球自转参数的差异,基于CONT08、CONT11、CONT14、CONT17和IVS-R1/R4定期观测的2008年、2011年、2014年、2017年数据进行地球自转参数解算。同时,利用与CONT观测同时段的GPS数据参与解算,并以IERS提供的EOP14 C04序列作为参考值进行精度评定。结果表明,CONT17与其他3组CONT观测值相比具有更高的极移解算精度,精度提升约40%,但UT1-UTC精度基本处于同一水平;CONT观测比其他类型VLBI观测数据具有更突出的优势,如极移精度提升约30%,UT1-UTC精度提升约45%;VLBI和GPS观测技术比较显示,前者在解算UT1-UTC上更占优势,而后者在解算极移上更占优势。In order to compare different time periods and different techniques for estimating earth rotation parameters,we design experiments to estimate ERP using CONT08,CONT11,CONT14,and CONT17 campaigns and IVS-R1/R4 regular observations in 2008,2011,2014 and 2017.At the same time,we use GPS data in the same period with CONT observations to participate in the solution.We use the EOP14 C04 sequence provided by IERS as a reference value for accuracy assessment.The results show that CONT17 has a higher polar motion solution accuracy than the other three sets of CONT observations,with an accuracy improvement of about 40%,but the accuracy of UT1-UTC is basically at the same level.CONT observations have more outstanding advantages than other types of VLBI observations,for example,the improvement in polar motion accuracy is about 30%and improvement in UT1-UTC accuracy is about 45%.As for the comparison between VLBI and GPS observations,the former is more advantageous in solving UT1-UTC,while the latter is more advantageous in estimating polar motion.

关 键 词：甚长基线干涉测量 地球自转参数 连续加密观测 日长变化 全球导航卫星系统 

分 类 号：P228[天文地球—大地测量学与测量工程]