Accession Number : ADP005646

Title :   Singularity Expansion Method: Target Resonances,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Morgan, Michael A.

Report Date : JUN 1987

Pagination or Media Count : 5

Abstract : A unified treatment of the natural mode representations for induced currents and scattered fields is described using elementary concepts of causalty and superposition. The transient back-scattered field is shown to have the form of a constant coefficient exponential series only in the late-time, after the last directly driven response is received from the scatterer. Prior to this, the early-time response is found to be due to both the direct physical optics fields as well as a sum of modulated natural classification using natural modes. Practical implications of this result, regarding aspect-invariant target classification using natural resonances, are discussed.

Descriptors :   *TARGET CLASSIFICATION, *RESONANCE SCATTERING, *ELECTROMAGNETIC SCATTERING, BACKSCATTERING, TRANSIENTS, EXPANSION, TIME, OPTICS, NATO.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE