The installed performance of an 8 GHz SATCOM reflector antenna on a UAV platform is modeled using Delcross Savant. Full 3D far field radiation patterns are computed and animated as the gimbaled antenna assembly is rotated through 360 degrees under a radome inside the forward UAV sensor compartment. Savant provides efficient high frequency EM simulation of installed antennas using an asymptotic shooting and bouncing rays (SBR) technique.