Accession Number : ADA293036

Title :   Physical Optics Polarization Scattering Matrix for a Right-Angle Dihedral.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Verly, J. G.

PDF Url : ADA293036

Report Date : 07 FEB 1995

Pagination or Media Count : 60

Abstract : Using the geometrical optics (GO) and physical optics (PO) approximations, a correct, complete, ready-to-use formula is derived from the backscatter (monostatic) polarization scattering matrix (PSM) of the perfectly conducting right dihedral at arbitrary incidence angle. The absence of such a result from the literature is surprising given that the dihedral's PSM is needed in many applications, such as in the calibration of polarimetric radars, including synthetic aperture radars (SAR), in the generation of simulated polarimetric radar imagery, and in automatic target recognition (ATR). Because the new results provided are important to many researchers who may not be experts in electromagnetic theory (as is often the case for the computer-vision researchers working on ATR), the report is relatively self-contained and takes the reader from the definitions of PSMs and complex radar cross-sections, through the mathematical formulation of Huygen's Principle, the combined use of GO and PO, and changes of polarization bases, to the derivation, discussion, and simplification of the dihedral's PSM.

Descriptors :   *SYNTHETIC APERTURE RADAR, *RADAR CORNER REFLECTORS, TARGET RECOGNITION, POLARIMETRY, RADAR IMAGES, BACKSCATTERING, RADAR CROSS SECTIONS, GEOMETRY, CALIBRATION, COMPUTER VISION, ANGLE OF INCIDENCE, SIMPLIFICATION, FORMULAS(MATHEMATICS), RIGHT ANGLES, DIHEDRAL ANGLE.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE