Accession Number : ADA134011

Title :   A Polarization Diversity Radar Data Processor.

Descriptive Note : Instrumentation papers,

Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Personal Author(s) : Metcalf,James I ; Armstrong,Graham M

PDF Url : ADA134011

Report Date : 28 Apr 1983

Pagination or Media Count : 29

Abstract : A real time data processor has been designed for use with the AFGL 10-cm Doppler weather radar which is to be operated with alternating transmission of horizontally and vertically polarized signals. In this mode of operation the reception of backscattered signals of polarizations identical to those of the transmitted signals allows the computation of the differential reflectivity between the two polarizations in addition to the absolute reflectivity and the Doppler mean velocity and variance. The switching of transmitted polarization introduces difficulties in the estimation of the autocovariance of the received signals, from which the Doppler velocity parameters are derived. The processor design and the allowed modes of radar operation circumvent these difficulties. This report describes the processing algorithms theoretically and presents details of the implementation of these algorithms in hardware. (Author)

Descriptors :   *DIVERSITY RADAR, *DOPPLER RADAR, *METEOROLOGICAL RADAR, *PROCESSING EQUIPMENT, *RADAR SIGNALS, POLARIZATION, DATA PROCESSING EQUIPMENT, HORIZONTAL ORIENTATION, VERTICAL ORIENTATION, ALGORITHMS, ORTHOGONALITY, REAL TIME, BACKSCATTERING, OPERATION, VELOCITY, REFLECTIVITY, TRANSMITTANCE, PARAMETERS, MEAN, DOPPLER SYSTEMS, SIGNALS

Subject Categories : Meteorology
      Computer Hardware
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE