1. Calculate the orbital velocity and the period of the following satellites of the earth:
a. The moon, which is 384,000 km from the earth's surface
b. A low earth orbit (LEO) communications satellite at an altitude of 650 km
2. For a GSO SATCOM system, compute the total atmospheric gas attenuation for an elevation angle of 80° and a signal frequency of 30 GHz.
3. For a GSO SATCOM system, compute the rain attenuation exceeded for only 0.001% of the time [i.e., calculate R(0.001)] in a region where R(0.01) is 30 mm/hr and the latitude is approximately 40 degrees north. The elevation angle of the receiving antenna is 80°, and the signal frequency is 30 GHz