A Technique for Real-Time Shadowing Adjustment of RCS Scattering Center Models

A method has been developed to adjust radar cross section (RCS) scattering models for two-body effects, particularly shadowing. The method described here involves using the near field scattering solution of one object to apply two-body corrections to another. By assuming that the second object can be represented by a known set of point scatterers, the fields at these scattering centers are used to calculate the adjusted RCS in the presence of the shadowing object using the principle of reciprocity. Since this approximation does not require a full-wave electromagnetic solution, it is considerably more computationally efficient than moment method solvers or other similar techniques, and thus could be adapted to real-time applications. The results of the method are compared against measurement and Moment Method simulation for the case of two cylinders, a cylinder and a cone, and two spheres. Good agreement is generally obtained between the proposed approximate model and measurements or Moment Method simulations.