Accession Number : ADA296099

Title :   Measurements of Natural Surfaces at Millimeter Waveiengths.

Corporate Author : MASSACHUSETTS UNIV AMHERST

Personal Author(s) : McIntosh, Robert E. ; Mead, James B.

PDF Url : ADA296099

Report Date : 16 MAY 1995

Pagination or Media Count : 7

Abstract : This contract achieved a number of important results in millimeter wave radar hardware development, measurements, and data analysis. Important results include demonstrating the equivalence of coherent and noncoherent polarimetric measurement techniques; the development of a Kalman filter to improve the convergence of noncoherent polarimetric measurements; the development of a single antenna 95 GHz polarimetric radar; measurement of the polarimetric response of deciduous and coniferous trees at 35, 95 and 225 GHz; and development of polarimetric scattering models for anisotropic scattering volumes. Among the most significant accomplishments of the last three years were the snow measurement campaigns of 1992-1994 which resulted in a large volume of fully polarimetric data at 35, 95 and 225 GHz. In addition to yielding long records of the diurnal variation in radar cross section, these data showed for the first time that anisotropy in the snow pack has a major impact on the polarimetric response throughout the millimeter hand Finally, we have initiated a significant effort to archive all polarimetiic data gathered during this project in the FINPACS database.

Descriptors :   *MILLIMETER WAVES, *POLARIMETRY, *RADAR CROSS SECTIONS, DATA BASES, DATA PROCESSING, MEASUREMENT, KALMAN FILTERING, INCOHERENCE, SNOW, ANISOTROPY, FREQUENCY RESPONSE.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE