Abstract:
This report presents the result of the computation of intersystem interference due to
hydrometeors using the simplified Capsoni Three Dimension (3-D) model when
horizontally polarized super-high frequency signals propagates through thunderstorm
rain type in Nigeria. The results obtained show that transmission loss increases with
increasing terrestrial transmitter to common volume distance indicating decreasing
probability of severe interference on the satellite system. Also, the frequency
characteristics of the transmission loss when transmitter antenna gain is 45dB and
time percentage unavailability is greater or equal to 0.01% ( ~ 0.01) shows that
transmission loss varies from 121.28dB to 135.58dB for short path lengths while for
the long path lengths, it varies from 159.4 to 166.35dB. In addition, evaluation of the
effective transmission loss shows that additional rain attenuation along the path will
severely weaken the received satellite signal, which may lead to acute signal outage
during occurrence of heavy and intense tropical precipitation However, the results of
the present work are in good agreement with those of the previous researchers
particularly for Nigeria which utilized vertical polarization
