Radio frequency interference measurements in Indonesia

Hidayat, Taufiq; Munir, Achmad; Dermawan, Budi; Jaelani, Anton T.; Léon, S.; Nugroho, D.; Suksmono, Andriyan Bayu; Mahasena, P.; Premadi, Premana W.; Herdiwijaya, Dhani; Kunjaya, Chatief; Dupe, Zadrach Ledoufij; Brahmantyo, Budi; Mandey, D.; Yusuf, M.; Wulandari, H.; Arief, Falahuddin; Irfan, Muhammad; Jatmiko, Agus; Akbar, E. I.; Sianturi, Hery Leo; Tanesib, Jehunias L.; Warsito, Ali; Utama, Judhistira Aria

doi:10.1007/s10686-013-9369-7

Cited by 17 publications

(5 citation statements)

References 17 publications

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“…As the main guide for RFI measurement, protocol by Ambrosini et al [4] is adapted. This protocol was also adapted previously by Hidayat et al [5]. Eight cardinal points were determined by an ordinary compass.…”

Section: Measurementmentioning

confidence: 99%

RFI measurements at Bosscha observatory to prepare a new VGOS station

Ramadhan,

Hidayat,

Suryana

et al. 2024

J. Phys.: Conf. Ser.

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A new VGOS (VLBI Global Observing System) radio telescope will be constructed at Bosscha Observatory Lembang, West Java, in cooperation between Shanghai Astronomical Observatory (SHAO) and Institut Teknologi Bandung. One of the preparation steps is to conduct RFI (Radio Frequency Interference) measurements to obtain the RFI environment from the vicinity of the observatory. In this work, we report preliminary measurements of the RFIs that were done for several days in August and September 2023. Instruments used includes: A-INFOTM LB-20180 horn antenna, Wright TechnologiesTM low noise amplifier, and AaroniaTM Spectran V5 80200 OEM spectrum analyzer. The frequency range of 2.0 - 18.0 GHz is targeted referring to VGOS frequencies. Measurements in one day are carried out for about 24 hours in eight cardinal directions and two polarizations. The results and analysis are presented in spectral power flux density plots.

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Section: Measurementmentioning

confidence: 99%

RFI measurements at Bosscha observatory to prepare a new VGOS station

Ramadhan,

Hidayat,

Suryana

et al. 2024

J. Phys.: Conf. Ser.

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“…They have identified potential locations in southeastern Indonesia where the sky and climate support astronomical observations [1]. Previous surveys have been performed for radio telescope development in a frequency range from low to 8 GHz [2,3].…”

Section: Introductionmentioning

confidence: 99%

A Study for a Radio Telescope in Indonesia: Parabolic Design, Simulation of a Horn Antenna, and Radio Frequency Survey in Frequency of 0.045–18 GHz

Sitompul,

Razi,

Manik

et al. 2024

Aerospace

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After years of preparation, the Indonesia National Observatory, located in Mount Timau, Kupang Regency, is currently in the completion stage of research in astronomy and astrophysics and related subjects. An optic telescope with a 3.8 m diameter is expected to receive its first light in mid-2024. A feasibility study for Indonesia’s radio telescopes and networks is in progress. A single-dish parabolic radio antenna with a diameter of 20 m is proposed to work in a frequency range of 1–50 GHz. An array dipole antenna with an area of 100 m × 100 m will also be installed at a 70–350 MHz frequency. A feasibility study about system design is in progress, and a radio frequency interference (RFI) survey has been underway since 2014. In this paper, we described the design of radio telescopes such as parabolic reflectors, horn antenna, and the radio frequency interference (RFI) in the surrounding area of the National Observatory, covering the frequency band from 45 MHz to 18 GHz. The frequencies in 45–85 MHz and 120–360 MHz intervals are still relatively quiet and suitable for developing radio telescopes. The selected higher frequency of 1.4 GHz for a neutral hydrogen (HI) spectral line, 6.6 GHz for a methanol (CH3OH) spectral line, and 8.6 GHz for a helium (3 He+) spectral line is still relatively quiet and suitable for the development of radio telescopes.

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“…Currently, modern astronomy facilities are being established at Timau National Observatory (Mumpuni et al, 2017(Mumpuni et al, , 2018. Mount Timau valley (altitude: 1532 m) has been chosen as a suitable observatory site based on its atmospheric condition in terms of clear sky fraction (Hidayat et al, 2012) and radio interference measurements (Hidayat et al, 2014;Sitompul et al, 2021). The construction of the main 3.8-meter Ritchey-Chrétien optical telescope with segmented mirror and Nasmyth foci is ongoing.…”

Section: Introductionmentioning

confidence: 99%

The potential use of the 20-meter radio telescope planned at the Timau National Observatory

Mumtahana,

Nurul Huda,

Husna

et al. 2023

RoAJ

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"The importance of radio telescopes for astronomy, geodesy, and other disciplines has been demonstrated by the growing number of radio telescopes worldwide, including in South-East Asia. Timau National Observatory has also considered a radiotelescope development program, which is expected to contribute both on a national and global scale. The diameter for the single dish is planned to be around 20-meter with a frequency range of 1-50 GHz. This paper outlines potential research for the planned radio telescope as a single dish as well as a part of future interferometer/VLBI collaboration. We collected several studies conducted with single antenna with a diameter of around 20-meter as a comparison to study its potential use as a single dish. As it is also essential to consider using an interferometer network, we also examined its capability as a part of VLBI, including the UV coverage and object simulation. Finally, it can be concluded that many studies can be conducted using the 20-m radio telescope as a single dish. Its location slightly below the equator can also play an important role in completing the global VLBI network."

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Radio frequency interference measurements in Indonesia

Cited by 17 publications

References 17 publications

RFI measurements at Bosscha observatory to prepare a new VGOS station

RFI measurements at Bosscha observatory to prepare a new VGOS station

A Study for a Radio Telescope in Indonesia: Parabolic Design, Simulation of a Horn Antenna, and Radio Frequency Survey in Frequency of 0.045–18 GHz

The potential use of the 20-meter radio telescope planned at the Timau National Observatory

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