Fade slope modeling at high elevation angle on space-earth path link

Rain fade slope is very useful knowledge used to design of the fade countermeasures in satellite communication link. Recently, ITU-R has proposed fade slope model by limiting elevation angle up to 50
⁰
. Rain fade slope was measured from downlink of space-earth path of MEASAT3 in Kuala Lumpur (3.3
⁰
N, 101.7
⁰
E), Malaysia for one year period during 1
^st
July 2010 - 30
^th
June 2011. The elevation angle is about 77
⁰
. This paper has investigated ITU-R model using measured data. A modified ITU-R model has been proposed for higher elevation angle based on measured data.