Broadcasting to terminals mounted on cars and trucks presents difficulties that do not occur when using terminals fixed at a specific location. ... A second problem posed by terminals mounted on moving vehicles is that they change direction constantly. ... toward the satellite from which it is to receive, and then be bolted in that orientation, a vehicle mounted antenna either has to be nearly omni- directional, anbsp;...
|Title||:||Progress In Astronautics and Aeronautics|
|Publisher||:||AIAA - 2003|