标题： 利用VGOS观测UT1-UTC 显示英文标题

标题： Observing UT1-UTC with VGOS

摘要： 我们展示了首次利用甚长基线干涉测量全球观测系统（VGOS）确定UT1-UTC的结果。 2019年12月至2020年2月期间，在日本石井和瑞典翁萨拉双筒望远镜的VGOS站进行了为期1小时的观测会话系列。 这一VGOS-B系列的数据在翁萨拉空间天文台进行了相关处理、后处理和分析。 所得的UT1-UTC结果与标准遗产S/X密集会话（INT1/INT2）的结果以及国际地球自转和参考框架服务（IERS）在IERS公告B中提供的最终值进行了比较。 与标准遗产S/X密集系列相比，VGOS-B系列的UT1-UTC结果的正式不确定性降低了3到4倍。 此外，与INT1/INT2结果相比，VGOS-B结果相对于IERS公告B的均方根（RMS）一致性提高了30%到40%。 显示英文摘要

摘要： We present first results of UT1-UTC determinations using the VLBI Global Observing System (VGOS). During December 2019 through February 2020 a series of 1~hour long observing sessions were performed using the VGOS stations at Ishioka in Japan and the Onsala twin telescopes in Sweden. The data of this VGOS-B series were correlated, post-correlation processed, and analysed at the Onsala Space Observatory. The derived UT1-UTC results were compared to corresponding results from standard legacy S/X Intensive sessions (INT1/INT2), as well to the final values of the International Earth Rotation and Reference Frame Service (IERS), provided in IERS Bulletin~B. The VGOS-B series achieve 3-4 times lower formal uncertainties for the UT1-UTC results than standard legacy S/X INT series. Furthermore, the root mean square (RMS) agreement with respect to the IERS Bulletin~B is 30-40 % better for the VGOS-B results than for the INT1/INT2 results.