Abstract: The invention is an apparatus for supporting a model above a ground plane for illumination by a radar signal in order to determine the RCS thereof. The apparatus includes a plurality of support towers in a spaced relationship extending vertically upward from the ground plane. An upper suspension system is provided that comprises a separate cable attached at one end to an individual tower and attachable at the opposite end to the model at a single point on the upper surface thereof so that the model can be simultaneously rotated about the yaw axis and pitch axis. A circular shaped track aligned with the direction of the radar signal is mounted below the ground plane having a center of the radius at the point that the cables of the upper suspension system attach to the model. A platform is movably mounted on the track and thus, moveable with a circular motion about the point that the cables attach to the model. The platform incorporates a drive system so that it can be positioned at any point along the track.