Accession Number : ADP005647

Title :   The Hybrid Wavefront Resonance Method,

Corporate Author : TEL-AVIV UNIV (ISRAEL)

Personal Author(s) : Heyman, Ehud

Report Date : JUN 1987

Pagination or Media Count : 24

Abstract : When observed over long periods, scattered returns from targets illuminated by broad band signals reveal distinctive features in the early and late time regimes. The features can be explained in terms of the different wave phenomena, progressive and oscillatory, that are dominant during these respective intervals. The former represent wavefront arrivals, and the latter full body resonances. A recently developed hybrid theory has formalized the connection between them and has provided new interpretations that did not emerge in earlier treatments. These interpretations can clarify issues which have arisen within the singularity expansion method (SEM), in particular, the adequacy of the expansion at early times. Here the hybrid wavefront resonance theory is reviewed, first within the rigorous context of scatering by a circular cylinder, and then via a ray analysis of scattering by a general (composite) object. (Author)

Descriptors :   *TARGET CLASSIFICATION, *HYBRID SYSTEMS, *EXPANSION, *RESONANCE SCATTERING, *WAVEFRONTS, ELECTROMAGNETIC SCATTERING, NATO.

Subject Categories : Target Direction, Range and Position Finding
      Radiofrequency Wave Propagation
      Theoretical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE