Measuring the impact of Indonesian antennas on global geodetic VLBI network

Measuring the impact of Indonesian antennas on global geodetic VLBI network
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测量印度尼西亚天线对全球大地测量 VLBI 网络的影响

DOI:
10.1007/s10686-021-09773-1
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发表时间:
2021
影响因子:
3
通讯作者:
Huda I
Huda I
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Huda I

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不久的将来,印度尼西亚地区将安装两台射电望远镜。建议将这些望远镜并入现有的甚长基线干涉测量(VLBI)网络,用于天文和大地测量目的。在这里,我们模拟了未来印度尼西亚天线的加入对地球定向参数和空间站位置估计的影响。模拟在两种类型的VLBI会话中执行。首先,我们分析了印度尼西亚天线对现有密集会话INT3(IN320-314)的贡献,重点是对dUT1的估计。我们发现,印尼天线的增加使估计的dUT1重复性值降低了约25%。接下来,我们考虑两种现有的网络配置,即R4(R4934)和AOV(AOV049),模拟24小时会话。总体而言,我们发现,在每种网络配置中添加印度尼西亚天线会使地球方位参数的重复性值降低约20%。同时,测站位置的重复性值最大可降低到12%。即使我们只包括一个印度尼西亚天线,这种减少也已经实现。
In the near future, two radio telescopes will be installed in the Indonesian region. These telescopes are proposed to be integrated into the existing Very Long Baseline Interferometry (VLBI) network both for astronomical and geodetical purposes. Here we simulate the impact of the inclusion of the future Indonesian antennas to the estimates of Earth Orientation Parameters and the station position. The simulation was performed in two types of VLBI sessions. First, we analyse the contribution of Indonesian antennas to the existing intensive session INT3 (IN320-314), which focuses on the estimation of dUT1. We found that the addition of Indonesian antennas has reduced the estimated dUT1 repeatability value by about 25%. Next, we simulate the 24-hour session by considering two existing network configurations, which are R4 (R4934) and AOV (AOV049). Overall we found that the addition of Indonesian antennas to each network configuration decreases the repeatability value of the Earth Orientation Parameter by about 20%. Meanwhile, the repeatability value of station position is reduced up to 12%. This reduction is already achieved even when we include only one Indonesian antenna.
勘误:关于从不同 VLBI 网络和观测计划获得的地球定向参数的比较
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