大地测量与地球动力学2025，Vol.45Issue(9)：894-898,904,6.DOI:10.14075/j.jgg.2024.09.436
基于VGOS与同步S/X VLBI解算地球自转参数的精度评估
Accuracy Assessment of Earth Rotation Parameters Derived from VGOS and Synchronous S/X VLBI Solutions
马慧斌 1秦文振 1江丹 1耿昌亮 1彭鑫1
作者信息
摘要
Abstract
To assess the accuracy of Earth rotation parameters(ERP)derived from the current VLBI global observing system(VGOS)observational data,this paper processes data from VGOS observa-tions made between 2019 and 2023.Simultaneously,traditional S-band and X-band VLBI observation-al data,which were obtained during the same periods as the VGOS data,were also included in the processing.The EOP 14 C04 series provided by the IERS were used as reference values for accuracy assessment.The results show that,during the selected experimental data periods,the average weigh-ted root mean square(WRMS)of the post-fit residuals of time delay from VGOS observational data is 16.77 ps,which is significantly better than the 30.97 ps from the traditional S/X VLBI measurements during the same periods.In terms of ERP determination,there are still differences between the re-sults from global network station observational data of VGOS and traditional S/X VLBI.Specifically,the ERP polar motion component accuracy derived from VGOS is inferior to that of traditional S/X VLBI,while the UT1-UTC accuracy is comparable to that of traditional S/X VLBI measurements.Further analysis using experimental stations centered on co-located stations indicates that VGOS measure-ments can provide ERP determination results with higher accuracy.关键词
甚长基线干涉测量/VLBI全球观测系统/地球自转参数/时延拟合后残差Key words
VLBI/VGOS/ERP/post-fit residuals of time delay分类
天文与地球科学引用本文复制引用
马慧斌,秦文振,江丹,耿昌亮,彭鑫..基于VGOS与同步S/X VLBI解算地球自转参数的精度评估[J].大地测量与地球动力学,2025,45(9):894-898,904,6.
