Monthly variation in Rainfall Attenuation for Ka band Satellite Communication for monsoon in Ahmedabad and New Delhi
Keywords:
Ka band, Satellite Communication, India, Rainfall Intensity, Rainfall Attenuation, Kothyari and Garde IDF equation, GSAT-14, ITU R model, ITU-R P618.8 rain attenuation model, ITU-R P837.6, June, July, August, September (JJAS), Indian Meteorogical Department (IMD), Ahmedabad, New Delhi, 122 days long monsoon of 64 years (1951 to 2014), fade mitigation techniques.Abstract
Rainfall attenuation plays a major role in link failure for Satellite Communication. When Ka band Satellite Communication is used, it becomes worse. India is a tropical country and so experiences heavy rainfall in the season of monsoon. Rainfall attenuation for entire monsoon is estimated for Ahmedabad and New Delhi from database of 64 years (1951 to 2014) taken from IMD. Attenuation for whole monsoon of 122 days is estimated for Ahmedabad and New Delhi locations of India. Coarse data taken from Indian Meteorogical Department is used for estimation. A novel method is invented for estimation which uses Kothyari and Garde equation for obtaining rainfall intensity for 60 minutes integration time. This data is converted to 1 minute integration time using ITU-R P 837.6. This 1 minute integration rainfall intensity is applied to ITU-R P 618.8 for estimation of rainfall attenuation in dBs. The obtained results are also matching with other works for Ka band for India.
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