What is the appearance of a communicating satellite from its plane of projection ?

Explanation

Communication satellite are actually geostationary satellite. This artificial satellite revolves around the earth with an angular velocity equal to that of the diurnal motion of the earth (and follows the same spinning direction) i.e., it revolves around the earth in 24 hours. Hence, the angular velocity of the satellite becomes zero with respect to the angular velocity of the earth. Hence when observed from the plane of projection, i.e., from the earth.s surface , the satellite will appear to be stationary in the sky.