Accession Number : ADA321492

Title :   Wave Propagation and Scattering in Geophysical Media.

Descriptive Note : Final rept. 1 Jan 93-30 Sep 96,

Corporate Author : WASHINGTON UNIV SEATTLE

Personal Author(s) : Ishimaru, Akira ; Kuga, Yasuo

PDF Url : ADA321492

Report Date : 25 NOV 1996

Pagination or Media Count : 34

Abstract : This research is directed toward basic studies on millimeter, microwave, and optical wave propagation and scattering in geophysical media, such as, hydrometers, smog, dust, snow, fog, atmospheric turbulence, terrain, and vegetation. These studies are aimed at understanding the physical mechanisms of the interactions between waves and geophysical media and developing new techniques in communications in adverse weather, detection and identification of objects and remote sensing in the geophysical environment. Our findings include a polarimetric scattering model for high slope rough surfaces which are often encountered in practice and a study on low grazing angle scattering which is directly applicable to the Army mission when both the transmitter and receiver are close to the surface. We also devised a new interferometric technique to detect a target in the presence of clutter (30728.14- GS) and a disclosure was made to the Office of Technology Transfer, University of Washington, on 'detection of a buried object using correlation technique' We also devised a technique to determine the average height profile of rough surfaces and a general formulation for pulse scattering. Our emphasis is on the development of angular, frequency and polarization correlation techniques applicable to remote sensing, target detection and communications

Descriptors :   *ELECTROMAGNETIC SCATTERING, *REMOTE DETECTORS, *GEOPHYSICS, POLARIZATION, WEATHER, SURFACE ROUGHNESS, TURBULENCE, MILLIMETER WAVES, IDENTIFICATION, INTERFEROMETRY, LIGHT TRANSMISSION, TARGET DETECTION, CORRELATION TECHNIQUES, DENSIMETERS, SMOG, GRAZING ANGLES.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE