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Measuring the impact of Indonesian antennas on global geodetic VLBI network
Experimental Astronomy ( IF 2.7 ) Pub Date : 2021-07-13 , DOI: 10.1007/s10686-021-09773-1
Ibnu Nurul Huda 1 , Taufiq Hidayat 1 , Budi Dermawan 1 , Premana W. Premadi 1 , Sahlan Ramadhan 1 , Lucky Puspitarini 1 , Hesti R. T. Wulandari 1 , Mohammad Hafieduddin 1 , Sébastien Lambert 2 , Niu Liu 3, 4 , Stéphane Leon 5 , Kenta Fujisawa 6 , Yoshinori Yonekura 7 , Koichiro Sugiyama 8 , Phrudth Jaroenjittichai 8 , Tomoya Hirota 9, 10 , Rene Breton 11 , Young-Chol Minh 12 , Dudy Wijaya 13 , Dhota Pradipta 13 , Nabila S. E. Putri 13
Affiliation  

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.



中文翻译:

测量印度尼西亚天线对全球大地测量 VLBI 网络的影响

在不久的将来,印度尼西亚地区将安装两台射电望远镜。建议将这些望远镜集成到现有的甚长基线干涉测量 (VLBI) 网络中,用于天文和大地测量目的。在这里,我们模拟了未来的印度尼西亚天线对地球定向参数和台站位置估计的影响。模拟是在两种类型的 VLBI 会话中进行的。首先,我们分析印度尼西亚天线对现有密集会话INT3(IN320-314)的贡献,其重点是dUT1的估计。我们发现,添加印度尼西亚天线后,估计的 dUT1 重复性值降低了约 25%。接下来,我们通过考虑两种现有网络配置来模拟 24 小时会话,它们是 R4 (R4934) 和 AOV (AOV049)。总的来说,我们发现在每个网络配置中添加印度尼西亚天线会使地球方向参数的可重复性值降低约 20%。同时,站点位置的重复性值降低了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。

更新日期:2021-07-13
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