Abstract
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.
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Acknowledgements
INH, TH, and BD gratefully acknowledge the support from the 2020 WCU Program of Institut Teknologi Bandung that allows us to conduct this project. We thank Prof. Fengchun Shu (SHAO) and an anonymous reviewer for their insightful comments and suggestions on the manuscript. We also would like to sincerely express our special thanks of gratitude to Indosat Ooredoo for their continuous support in fundamental research, particularly to develop the VLBI Project in Indonesia.
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Huda, I., Hidayat, T., Dermawan, B. et al. Measuring the impact of Indonesian antennas on global geodetic VLBI network. Exp Astron 52, 141–155 (2021). https://doi.org/10.1007/s10686-021-09773-1
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DOI: https://doi.org/10.1007/s10686-021-09773-1