Earth‐Space Path Cloud Attenuation Distribution Study
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Description
The study investigates the impact of cloud attenuation at C, Ku, Ka, and V‐ bands in West Africa. Cloud
attenuation statistics deducted from extracted data obtained from ITU‐R study group data bank for the
seventeen countries in the region, were used to determine the average satellite link margin for the
region. Analysis of their cloud attenuation contour maps shows the average cloud attenuation for uplink
and downlink: at the c‐band are 0.17 dB and 0.095 dB; at Ku‐band are 0.875 dB and 0.665 dB; at Ka‐band
3.75 dB and 1.775 dB; and at V‐band are 9.25 dB and 6.6 dB respectively in the tropical wet/dry climatic
part of the region, while those for the tropical wet and tropical semi‐arid climatic parts of the region are
relatively higher and substantially lower respectively. Hence a margin of 1.8 dB and 3.8 dB; 6.3 dB and 9
dB for cloud attenuation in the uplink and downlink at Ka and V‐band respectively are recommended.
Keywords
Q Science (General), QC Physics