A receiving antenna on earth, located at 55 degrees north latitude, has a 3 dB beamwidth of 1° at 10 GHz. Its elevation angle is 50°, and it is pointing directly at the moon. Rain is falling at a rate of 25 mm/hr. The feeder cable loss is 3 dB, and the receiver noise figure is 2 dB. Calculate the equivalent noise input power to the receiver