Online Colloquium

Friday, October 16 2020 at 01.30 p.m  (UT+7)


Importance of Radio Telescope in Indonesia
for Global Geodetic VLBI Network


Speaker: Dr. Ibnu Nurul Huda.


Astronomy Study Program, FMIPA ITB
Bosscha Observatory, FMIPA ITB


We invite all colloquium enthusiasts to join via the Zoom link (limited to 100 participants):
Meeting ID: 819 0255 9247
Passcode: 541717

or via Youtube live stream:

Thank you for your attention and active participation.

Colloquium coordinator,

Dr. Anton Timur Jaelani 


To keep up with the modern development of astronomy in the world, Indonesian astronomers have commenced studying the possibility of developing new observatory in other Indonesian regions that are suitable for the development of multi-wavelength astronomy. Besides optical wavelengths, radio waves are naturally the main choice to introduce the multi-wavelength domain regarding a variety of important scientific interests. Considering this development, radio telescopes must be provided and prepared further to work in the network of radio telescopes that already exists in many regions of the globe such as Very Long Baseline Interferometry (VLBI) network. Two places have been selected as a host of new radio telescopes. Mount Timau in Timor Island will be the host of the new National Observatory and in the original proposal, a radio telescope envisaged to be integrated to the next VLBI generation was proposed. Meanwhile, a decommissioned telecommunication antenna in the city of Jatiluhur is currently being undertaken to be converted into a radio telescope. To develop the Indonesian VLBI campaign, and considering two antennas will be available in Jatiluhur and in Timau site, in this work we first undertake to study the possibility to use these telescopes, not only for astronomy/astrometry, but also for geodesy to enhance a more multi-disciplinary and collaborative work. Here we simulate the implication of these two future Indonesian antennas to the estimates of Earth orientation parameters (polar motion, nutation, and dUT1) and the station position. The simulation was performed in two types of VLBI session. First, we conduct the simulation of an intensive session between Japanese antenna Syowa and Indonesian antennas. Next, we simulate the complete 24 hours session by considering some different network configurations. Generally, we found that the Indonesian antennas play an important role to improve the estimation of station position as well as the Earth orientation parameters.