Nor Hazmin Sabri, Roslan Umar, Wan Zul Adli Wan Mokhtar, Zamri Zainal Abidin, Zainol Abidin Ibrahim, Azman Azid, Hafizan Juahir, Mohd Ekhwan Toriman, Mohd Khairul Amri Kamarudin


Radio signals detected from the ground are very weak since it travels far from the universe. Radio wave carries photons with low energies compared to other electromagnetic spectra such as visible light, ultraviolet, X-rays, and the most energetic electromagnetic wave is gamma-rays. The microwave region is the shortest wavelength of radio waves. Hence, microwave photons have greater energy. Radio astronomy studies are restricted due to radio frequency interference (RFI) that produces by human daily activities. If this disturbance is not shrinkage, it poses critical problems in radio observation. There are many factors of man-made RFI, such as, the availability of mobile telecommunications, radio transmission, TV broadcasting, satellite communication, vehicular traffic area, power transmission line and many more. In this paper, we present a preliminary study of the radio sources (electronic system in the car) from the vehicular traffic area (highway) on radio astronomy observation. This study is important to assess how the vehicles  affect the radio signal in radio astronomical sources of low frequency such as hydrogen line and deuterium (which wavelength more than 1mm). These research findings would benefit radio astronomy research, especially to profile the RFI pattern in Malaysia. 


Radio signals, man-made RFI, vehicular traffic, radio astronomical sources

Full Text:



R. Ekers, and J. Bell. 2000. Preserving the Astronomical Sky IAU Symposium 196.

R. Umar, Z. Z. Abidin, Z. A. Ibrahim, Z. Rosli, and N. Noorazlan. 2014. Research in Astronomy and Astrophysics (RAA). 14: 241-248.

J. Ponsonby. 1991. Journal of Navigation. 44: 392-398.

J. Nakajima, Y. Koyama, M. Sekido, N. Kurihara, T. Kondo, and K. Shibata (2001).

B. F. Burke, and F. Graham-Smith. 2010. An introduction to Radio Astronomy. Cambridge University Press,

Z. Abidin, R. Umar, Z. Ibrahim,Z. Rosli, K. Asanok, and N.Gasiprong. 2013. Publications of the Astronomical Society of Australia. 30: e047

R. Ambrosini, P. Bolli, C. Bortolotti, F. Gaudiomonte, F. Messina, and M. Roma. 2010. Experimental Astronomy. 27: 121-130.

B. E. Keiser, Dedham.1979. Mass., Artech House, Inc.,. 341: 1.

J. E. Ferris, and D. L. Sengupta 1980.

S. W. Ellingson, G. Hampson, and J. Johnson. 2003. Design of an L-band Microwave Radiometer with Active Mitigation of Interference. In International Geoscience and Remote Sensing Symposium. 3: III-1751.

Umar, R., Abidin, Z. Z., & Ibrahim, Z. A. 2014, October. The Importance of Site Selection for Radio Astronomy. In Journal of Physics: Conference Series. IOP Publishing. 539(1): 012009.

R. Umar, Z. Abidin, Z. Ibrahim, N. Gasiprong, K. Asanok, S. Nammahachak, S. Aukkaravittayapun, P.Somboopon, A. Prasit, N. Prasert, et al. 2013. Middle-East Journal of Scientific Research. 14: 861-866.

R. Ambrosini, R. Beresford, A. Boonstra, S. Ellingson, K. Tapping, and Y. Terzian, SKA. 2003. Memo Series.

S. W. Ellingson. 2002. A survey of 1200-1800 Mhz Using a Discone and a Spiral with the Argus Front End, Tech. Rep., Project Internal Report. Available at http://esl. eng. ohio-state. edu/ rstheory/iip/docserv. Html.

R. Cohen. 2003. Organizations and Strategies in Astronomy. 59-74.

J. W. Baars, L. R. D’Addario, and A. R. Thompson. 2009. Proceedings of the IEEE 97. 1377-1381.



  • There are currently no refbacks.

Copyright © 2012 Penerbit UTM Press, Universiti Teknologi Malaysia.
Disclaimer : This website has been updated to the best of our knowledge to be accurate. However, Universiti Teknologi Malaysia shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.
Best viewed: Mozilla Firefox 4.0 & Google Chrome at 1024 × 768 resolution.