E9D04 (A)
Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?
A. In order to track the satellite as it orbits the Earth
B. So the antenna can be pointed away from interfering signals
C. So the antenna can be positioned to cancel the effects of Faraday rotation
D. To rotate antenna polarization to match that of the satellite
