• +605 249 0500
  • enquiries@qiup.edu.my

Seminar 12: Rain Attenuation in Satellite Communications

“Rain Attenuation in Satellite Communications”
by: Assoc. Prof. Dr. Yagasena Appanah
School of Engineering and Computer Technology
Faculty of Integrative Sciences and Technology
Quest International University Perak (QIUP)
DATE: 22 August 2013 (Thursday)
TIME: 3 – 4 p.m
VENUE: Lecture Room 4, Applied Sciences Building, QIUP


Rain attenuation is the major environmental cause of outages to satellite communication systems in tropical and equatorial climates. It refers to the absorption and scattering of microwave radio frequency signals by raindrops along the uplink and downlink path. Rain attenuation in satellite link is a function of frequency, elevation angle and rain rate. Rain attenuation is not predictable on an instantaneous basis, but statistical estimates can be made that allows for reliable links to be designed and maintained with sufficient availability to satisfy commercial requirements. The International Telecommunications Union (ITU) has set the acceptable satellite signal outage time as ≤ 0.01% in a year for commercial satellite links. Research has shown that the rain attenuation models proposed for the temperate region does not work well for tropical and equatorial regions. As such intense research is being carried out to propose a reliable rain attenuation model for use in the tropical and equatorial region. This seminar will highlight the experimental rain attenuation results obtained in Malaysia in comparison with other tropical countries.

Back to FIST Seminar List

Scroll to Top