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Radio frequency interference measurements in Indonesia |
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| Authors: | Taufiq Hidayat Achmad Munir Budi Dermawan Anton Timur Jaelani Stéphane Léon Dading Hadi Nugroho Andriyan Bayu Suksmono Putra Mahasena Premana Wardayanti Premadi Dhani Herdiwijaya Chatief Kunjaya Zadrach Ledoufij Dupe Budi Brahmantyo Denny Mandey Muhammad Yusuf Hesti Retno Tri Wulandari Falahuddin Arief Muhammad Irfan Agus Triono Puri Jatmiko Evan Irawan Akbar Hery Leo Sianturi Jehunias Leonidas Tanesib Ali Warsito Judhistira Aria Utama |
| Institution: | 1. Bosscha Observatory and Astronomy Research Division, FMIPA, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia 2. Laboratory of Radio Telecommunication and Microwave, School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia 3. Joint ALMA Observatory/ESO, Av. Alonso de Córdova 3107 Vitacura, Santiago, Chile 4. Faculty of Earth Science and Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia 5. Department of Physics, Faculty of Science and Technology, University of Nusa Cendana, Jl. Adisucipto, Penfui-Kupang, 85001, Indonesia 6. Department of Physics Education, FPMIPA, Indonesia University of Education, Jl. Dr. Setiabudhi 229, Bandung, 40154, Indonesia |
| Abstract: | We report the first measurements of radio frequency spectrum occupancy performed at sites aimed to host the future radio astronomy observatory in Indonesia. The survey is intended to obtain the radio frequency interference (RFI) environment in a spectral range from low frequency 10 MHz up to 8 GHz. The measurements permit the identification of the spectral occupancy over those selected sites in reference to the allocated radio spectrum in Indonesia. The sites are in close proximity to Australia, the future host of Square Kilometre Array (SKA) at low frequency. Therefore, the survey was deliberately made to approximately adhere the SKA protocol for RFI measurements, but with lower sensitivity. The RFI environment at Bosscha Observatory in Lembang was also measured for comparison. Within the sensitivity limit of the measurement equipment, it is found that a location called Fatumonas in the surrounding of Mount Timau in West Timor has very low level of RFI, with a total spectrum occupancy in this measured frequency range being about 1 %, mostly found at low frequency below 20 MHz. More detailed measurements as well as a strategy for a radio quiet zone must be implemented in the near future. |
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