摘要
为评估当前VLBI全球观测系统(VGOS)观测数据解算地球自转参数(ERP)的精度,基于2019—2023年VGOS观测数据进行解算,同时选取与VGOS观测数据同时段传统S频段、X频段的VLBI观测数据参与解算,以IERS提供的EOP 14 C04序列作为参考值进行精度评定。结果表明,在选取的实验数据时段,VGOS观测数据的时延拟合后残差加权均方根(WRMS)的平均值为16.77 ps,显著优于同时段传统S/X VLBI测量数据的30.97 ps。在ERP解算方面,VGOS和传统S/X VLBI的全球网络站观测数据的解算结果存在差异,其中,VGOS解算ERP极移分量的精度不如传统S/X VLBI,UT1-UTC精度与传统S/X VLBI测量相当。进一步选取以并址站为核心的实验站进行分析表明,VGOS测量能够提供更高精度的ERP解算结果。
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 observations made between 2019 and 2023.Simultaneously,traditional S-band and X-band VLBI observational data,which were obtained during the same periods as the VGOS data,were also included in the processing.The EOP14 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 weighted 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 global network station observational data of VGOS and traditional S/X VLBI in the determination of Earth rotation parameters.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 measurements can provide ERP determination results with higher accuracy.
作者
马慧斌
秦文振
江丹
耿昌亮
彭鑫
MA Huibin;QIN Wenzhen;JIANG Dan;GENG Changliang;PENG Xin(Troops 61363,Xi’an 710054,China)
出处
《大地测量与地球动力学》
2025年第9期894-898,904,共6页
Journal of Geodesy and Geodynamics
作者简介
第一作者:马慧斌,工程师,主要研究方向为空间大地测量学,E-mail:576214595@qq.com。
