论文标题
NTSC VLBI系统及其在UT1测量中的应用
The NTSC VLBI System and its application in UT1 measurement
论文作者
论文摘要
为了实时测量通用时间（UT1），国家时间服务中心（NTSC）建立了一个类似VGOS（VLBI全球观察系统）宽带VLBI网络，其中包括位于Jilin，Sanya和Kashi的三个13-M射电望远镜，以及XI'AN的数据分析中心。每个站都配备了一个高度稳定的氢原子钟和一个自发的VLBI后端，并与两个GPS接收器共同铺设。这个类似VGOS的VLBI网络可能在改善中国宽带VLBI技术并为UT1的国内VLBI测量中做出宝贵的贡献，在改善中国宽带VLBI技术方面起着重要作用。在本文中，我们介绍了该VLBI网络的规格，并使用该网络的Jilin-Kashi基线在2018年进行的C波段进行了UT1测量。我们的UT1估计值与IER提供的比较之间的比较表明，NTSC VLBI网络能够在58.8微秒的水平上确定UT1精确度。
In order to measure the Universal Time (UT1) in real time, National Time Service Center (NTSC) has built a VGOS-like (VLBI Global Observing System) broadband VLBI network, which includes three 13-m radio telescopes located in Jilin, Sanya and Kashi, and a data analysis center in Xi'an. Each station is equipped with a highly stable hydrogen atomic clock and a self-developed VLBI backend, and is co-located with two GPS receivers. This VGOS-like VLBI network may play an important role in improving the Chinese broadband VLBI technology and making valuable contributions to domestic VLBI measurements of UT1. In this paper, we introduce the specifications of this VLBI network, and present the UT1 measurements at C-band conducted in 2018 using the Jilin-Kashi baseline of this network. The comparisons between our UT1 estimates and those provided by IERS suggest that the NTSC VLBI network is capable to determine UT1 accurate at the level of 58.8 microseconds.
