Altitude Effect on Radio Frequency Interference (RFI) in Radio Astronomy

Roslan, Umar and Z. Z., Abidin and Z. A., Ibrahim and M. S. R., Hassan and Z., Rosli and N., Noorazlan (2014) Altitude Effect on Radio Frequency Interference (RFI) in Radio Astronomy. In: 7th Mathematics and Physical Science Graduates Congress, 12-14 December 2011, National University of Singapore (NUS).

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Abstract

Radio Astronomy has made very important contributions to Astronomy and Astrophysics by discovering such exotic phenomena such as pulsar, quasar and cosmic microwave background. Radio astronomy uses the radio spectrum to identify weak emissions from outer space sources and the others signal so-called Radio Frequency Interferences (RFI). Measurement of RFI level on potential radio astronomical sites can be done to measure the RFI Levels at those sites. Two chosen sites are Meteorology Station, University of Malaya and Department of Physics University of Malaya; both of them have different value of altitude, 109 m and 81 m, representatively. In this paper, we report the initial testing RFI survey for overall spectrum (0-2GHz) for both sites. The averaged RFI peaks at the two sites are -83.08 (±5.13) dBm and -86.32 (±6.82) dBm and the averaged RFI peaks without the main RFI -86.20 (±2.32) dBm and -94.38 (±3.12) dBm respectively.

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