GRECO - GRAPHICAL PROCESSING METHODS FOR HIGH-FREQUENCY RCS PREDICTION

This paper reviews the graphical processing approach (Greco) to comput e high-frequency radar cross section (RCS) of complex radar targets in real time with a 3-D graphics workstation. Targets are modeled with a solid modeling CAD package using a parametric surface approach. High- frequency RCS of perfectly conducting objects is obtained through phys ical optics, elementary edge waves and ray-tracing methods. An image o f the target at the workstation screen is processed to obtain unit nor mals, radius of curvature and orientation of illuminated surfaces and edges. The result is a very fast and efficient code for RCS computatio n of complex targets.