Tropospheric Scintillation and its Impact on Earth- Space Satellite Communication in Nigeria
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Abstract
Description
The study investigates the impact of tropospheric
scintillation on fixed satellite communication link on earth-space
path for frequencies between 10 and 50 GHz for 37 stations in
Nigeria. Elevation angles of 5º, 55º which are typical look angles
for links over the Atlantic Ocean region and Indian Ocean
region, look angles to the Nigeria Communication Satellite was
also considered. Meteorological climatic data retrieve from
satellite such as; profiles of temperature, pressure, and relative
humidity, were validated with the available ground data in
Nigeria. These data were reprocessed to derive radio propagation
input parameters, such as; water vapour density integrated water
vapour content and radio refractivity. Secondly, the International
Telecommunication Union Propagation model (ITU-P 618, 2009)
was used to estimate tropospheric scintillation for time
unavailability between 0.01 to 10% in an average year. The result
shows that scintillation fade depth is between 4.0 to 19.0 dB and
0.2 to 1.3 dB at 5º and 55º elevation angles respectively. For links
to NigComsat scintillation fade depth is between 0.05 to 1.26 dB
for all the 37-locations. The results will help in designing,
planning and quick integration and expansion of satellite
telecommunication services in the six regions of Nigeria.
Keywords
Q Science (General), QC Physics