any body have information about SATCOM applications on UAVs(unmanned air vehicle)

What will be the size of an antenna and what will be the elevation angle of an antenna for tracking a geosync satellite from latıtude 40 longitude 5
satellite is in latitude 0 longitude 5 and at a distance 38000km

data rate 2mbps and also data will be uploaded to satellite

Added after 1 minutes:

spot beam? for this aplication