利用VLBI加强观测解算UT1流程及精度验证

Solution Process and Accuracy Verification of UT1 Using VLBI Intensive Observation

分析了加强观测的解算策略,探索出了基于国际公开数据VLBI加强观测的UT1-UTC解算流程。利用VieVS软件解算了2020—2021年国际公开的VLBI加强观测数据,对解算流程及结果进行了验证。结果表明,该解算可靠稳定且与国际同类产品一致性较好,解算结果的形式精度稳定在0.01 ms左右,UT1-UTC值与IERS C04之间存在±0.05 ms的差异,其较差的RMS在0.035 ms左右。

The solution strategy of intensive observation is analyzed,and the UT1-UTC solution process of intensive observation based on international public data VLBI is explored.The international public VLBI intensive observation data from 2020-2021 are solved using VieVS software,and the solution process and results are verified.The results show that the solution is reliable and stable,and has good consistency with similar international products.The formal accuracy of the solution results is stable at around 0.01 ms,with a difference of±0.05 ms between the UT1-UTC value and IERS C04,with a poor RMS of around 0.035 ms.