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HOW TO DEAL WITH RADIO ASTRONOMY INTERFERENCE

  • 투고 : 2014.11.30
  • 심사 : 2015.06.30
  • 발행 : 2015.09.30

초록

Radio sources are very weak, as they can travel through large distances. Radio sources also have photons with low energies compared to others electromagnetic waves (EM). Microwave photons have a little more energy than radio waves, infrared photons have still more, then visible, ultraviolet, X-rays, and the most energetic electromagnetic wave is gamma-rays. Radio astronomy studies are restricted due to radio frequency interference (RFI) produced by people. If this disturbance is not minimized, it poses critical problems for astrophysical studies. The purpose of this paper is to profile RFI maps in Peninsular Malaysia with a minimum mapping technique for RFI interference. Decision-making processes using GIS (Geographical Information System) for the selection requires gathering information for a variety of parameters. These factors affecting the selection process are also taken into account. In this study, various factors or parameters are involved, such as the availability of telecommunications transmission (including radio and television), rainfall, water lines and human activity. This mapping step must be followed by RFI site testing in order to identify areas of low RFI. This study will benefit radio astronomy research, especially regarding the RFI profile.

키워드

참고문헌

  1. Abidin, Z. Z., Bahari, S. S. R., & Ibrahim, Z. A., 2010, RFI Pro les of Pime Candidate Sites for the First Radio Astronomical Telescope in Malaysia, NA, 15, 3
  2. Abidin, Z. Z., Ibrahim, Z. A., Adnan, S. B. R. S., & Anuar, N. K., 2009, Investigation of Radio Astronomical Win-dows Between 1 MHz and 2060 MHz in Universiti Malaya, Malaysia, NA, 14, 6
  3. Abidin, Z. Z., Ibrahim, Z. A., Rosli, Z., Malim, S. F. F., Anim, N. M., & Noorazlan, N., 2012, An RFI Investigation for Setting up a VLBI Station Below 2.8 GHz in Malaysia, NA, 17, 2
  4. Abidin, Z. Z., Umar, R., Ibrahim, Z. A., Rosli, Z., Asanok, K., & Gasiprong, N., 2013, Investigation on the Frequency Allocation for Radio Astronomy at the L Band, PASA, 30.
  5. Umar, R., Abidin, Z. Z., Ibrahim, Z. A., Rosli, Z., & Noorazlan, N., 2013, Selection of Radio Astronomical Observation Sites and its Dependence on Human Generated RFI, RAA, 14, 2

피인용 문헌

  1. Spatial Model of Sky Brightness Magnitude in Langkawi Island, Malaysia vol.17, pp.4, 2017, https://doi.org/10.1088/1674-4527/17/4/37