The earth station antenna has a gain of 55 dB, operating at 14 GHz, while the satellite is at geo-synchronized orbit of 36,500 km away. The satellite antenna has a gain of 35 dB and operates at 12 GHz. The minimum usable power is 8 pico watts (pW).


Determine:

a. Minimum satellite transmitted power

b. Peak power required at earth station if the satellite is a radar target with backscattering crosssection in 25 meter-squared, and minimum detectable power is 0.5 pW.