Abstract
Specific attenuation is the fundamental quantity in the calculation of rain attenuation for terrestrial path and slant paths representing as rain attenuation per unit distance (dB/km). Specific attenuation is an important element in developing the predicted rain attenuation model. This paper deals with the empirical determination of the power law coefficients which allow calculating the specific attenuation in dB/km from the knowledge of the rain rate in mm/h. The main purpose of the paper is to obtain the coefficients of k and α of power law relationship between specific attenuation. Three years (from 1st January 2006 until 31st December 2008) rain gauge and beacon data taken from USM, Nibong Tebal have been used to do the empirical procedure analysis of rain specific attenuation. The data presented are semi-empirical in nature. A year-to-year variation of the coefficients has been indicated and the empirical measured data was compared with ITU-R provided regression coefficient. The result indicated that the USM empirical measured data was significantly vary from ITU-R predicted value. Hence, ITU-R recommendation for regression coefficients of rain specific attenuation is not suitable for predicting rain attenuation at Malaysia.
Similar content being viewed by others
References
J. S. Mandeep, N. Y. Yann, and S. I. S. Hassan, “Case study of the rain attenuation at Ka-band,” Journal of Electromagnetic Waves and Applications 22, 1517–1525 (2008).
T. Pratt, C. W. Bostian, and J. E. Allnutt, “Satellite Communications”, 2nd Edition, (John Wiley & Sons, 2003).
J. S. Mandeep and K. Tanaka, “Effect of atmospheric parameters on satellite link,” International Journal of Infrared and Millimeter Waves 28, 789–795 (2007).
J. S. Mandeep, “Comparison of rainfall models with Ku-band beacon measurement,” Acta Astronautica 64, 264–271 (2009).
ITU-R P.838. Specific attenuation model for rain for use in prediction methods, International Telecommunication Union, Geneva, Switzerland, 2006.
J. S. Mandeep, “Rainfall measurements at Ku-band satellite link in Penang, Malaysia,” IET Microwaves Antennas and Propagation 2 (2), 147–151 (2008).
ITU-R P. 618-6, Propagation Data and Prediction Methods Required for the Design of Earth-Space Telecommunication Systems (2001).
W. L. Stutzman and K. M. Yon, “A simple rain attenuation model for earth-space radio links operating at 10-35 GHz,” Radio Sciences 21 (1), 65–72 (1986).
Acknowledgement
The authors are grateful to Electrical and Electronic School of USM Engineering Campus for technical support. I would like to acknowledge Institute of Graduate Studies (IPS Fellowship) -USM and Research University Postgraduate Research Grant Scheme (USM-RU-PGRS). The work reported here would have not been possible without the grants from Universiti Sains Malaysia. The authors would like to express sincere thanks to the reviewers whose comments helped to improve the original version of this article.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mandeep, J.S., Ng, Y.Y., Abdullah, H. et al. The Study of Rain Specific Attenuation for the Prediction of Satellite Propagation in Malaysia. J Infrared Milli Terahz Waves 31, 681–689 (2010). https://doi.org/10.1007/s10762-010-9620-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10762-010-9620-5