| 摘要 |
<p>A computer implemented method of computing radar cross-section (RCS) of an object having a fully or partially open cavity is disclosed. The method comprises receiving data representing at least part of the object including the cavity as a mesh comprising a plurality of triangular elements and performing a ray tracing operation on the data to find rays paths in the cavity and exit rays. The method further comprises determining field amplitudes of the exit rays by calculating ray tube divergence factors and planar reflection coefficients, thereby producing a geometrical optics field, which is subsequently used to compute a backscattered field. The calculation of the ray tube divergence factors involve curvature information relating to said mesh which is computed by calculating a Weingarten curvature matrix over each said triangular element. The backscattered field is subsequently used to compute the RCS of at least part of the object represented by the data.</p> |
