This is a satellite communications primer.To send to and receive from such satellites, the earthstation must either track the satellite across the sky or have an antenna ... The closer they are to Earth, the faster the satellites move as seen from a location on the planet, and the smaller the service area of each satellite. ... A narrower beam would not cover the full visible portion of the earth; a wider beam would waste power into the void of space.
|Title||:||Satellite Communications for the Nonspecialist|
|Author||:||Mark R. Chartrand|
|Publisher||:||SPIE Press - 2004|