VLBI观测资料解算地球自转参数精度分析  

Accuracy Analysis of Solving Earth Rotation Parameters Based on VLBI Observation Data

作　　者：钱炜 岳建平[1] 单丽杰 韩宸宇 QIAN Wei;YUE Jianping;SHAN Lijie;HAN Chenyu(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学地球科学与工程学院,南京市211100

出　　处：《大地测量与地球动力学》2021年第12期1245-1248,共4页Journal of Geodesy and Geodynamics

基　　金：国家重点研发计划(2018YFC1508603)。

摘　　要：为分析VLBI观测资料解算地球自转参数的精度,根据VLBI观测原理及其误差方程,分别利用2020年VLBI观测数据及CONT17连续加密观测的XA、XB两种频率通道数据解算地球自转参数,并以EOP14 C04序列作为计算外符合精度的参考序列。结果表明,VLBI观测数据解算地球自转参数各分量的外符合精度均能满足高精度要求,比较解算结果与同时段GPS连续数据的解算结果发现,两者精度总体处于同一水平;CONT17观测的XA、XB两种频率通道数据解算极移时精度相当,但前者在稳定性及解算UT1-UTC序列精度上具有较大优势。In order to analyze the accuracy of the earth rotation parameters solved by VLBI observation data,according to VLBI theory and error equation,we calculate the parameters using the VLBI data in 2020 and the XA and XB frequency channel data from continuous intensive CONT17 observation.We use the EOP14 C04 sequence as reference to obtain the external coincidence accuracy.The results show that the external coincidence accuracy of each component of rotation parameters can meet the requirements of high accuracy through the VLBI data.Compared with the continuous GPS data which are in the same period,the VLBI data present similar accuracy in calculating earth rotation parameters.The XA and XB frequency channel data perform similar accuracy in dealing with polar motion series,but the former performs better in stability and has great advantages in UT1-UTC sequence.

关 键 词：地球自转参数 甚长基线干涉测量 极移 频率通道 外符合精度 

分 类 号：P228[天文地球—大地测量学与测量工程]