Accession Number : ADA189291

Title :   A Polarization Diversity Meteorological Radar System.

Descriptive Note : Interim rept.,

Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

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

PDF Url : ADA189291

Report Date : 19 Mar 1987

Pagination or Media Count : 302

Abstract : The AFGL 10-cm Doppler weather radar was modified to enable the measurement of the differential reflectivity between horizontal and vertical polarizations in addition to the absolute reflectivity and the Doppler mean velocity and spectrum variance. Polarization switching is achieved by means of a diplexer, which separates at the antenna the transmitted signals of two frequencies, 2710 and 2760 MHz, and permits nearly simultaneous transmission of signals of orthogonal polarizations. Signals of these frequencies can be transmitted either with horizontal and vertical polarization, respectively, or with left and right circular, polarization, respectively. We describe the design and performance of the diplexer and the performance of the real-time data processor, present examples of meteorological measurements, and discuss future developments of the radar system. Keywords: Polarization diversity weather radar, Dual polarization radar, and Polarization switching.

Descriptors :   *DATA PROCESSING EQUIPMENT, *DOPPLER SYSTEMS, *HORIZONTAL ORIENTATION, *METEOROLOGICAL RADAR, *METEOROLOGY, *POLARIZATION, *VERTICAL ORIENTATION, DIPLEXERS, DIVERSITY RECEPTION, FREQUENCY, MEAN, MEASUREMENT, ORTHOGONALITY, RADAR, REAL TIME, REFLECTIVITY, SIGNALS, SPECTRA, SWITCHING, SYNCHRONISM, TRANSMITTANCE, VARIATIONS, VELOCITY

Subject Categories : Active & Passive Radar Detection & Equipment
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE