MEASUREMENT CAPABILITIES ASSESSMENT IN THE METHOD OF DIFFERENTIAL RADAR REFLECTIVITY IN THE PROBLEMS OF REMOTE SENSING OF METEOROLOGICAL FORMATIONS

 

S. S. Dyachenko
Tomsk State University of Control Systems and Radioelectronics (TUSUR University)

 

The paper is received on December 11, 2014

 

Abstract. The most common methods of obtaining estimates of the degree of polarization anisotropy are the methods of differential radar reflectivity and a modified differential radar reflectivity. One of the factors determining the incomplete (incorrect) interpretation of the definition dependence of the magnitude of the differential radar reflectivity on the trace length z, is the presence of a differential phase shift Δφ and differential attenuation Δα. Results of primary analysis of opportunities to enhance the method of differential radar reflectivity for the solution of tasks of remote sensing of meteorological formations are presented. The preliminary results of additional measurements indicating the need of the accounting of influence of differential factors (differential loosening and differential shift) on a polarization characteristic of a signal in the course of distribution are also received from front boundary of meteorological formations to the periphery. The dependence of the modified differential radar reflectivity on the path length for various rain intensity at various values are considered. Dependency changes become more pronounced, periodicity of the polarization characteristics arises, the nonlinearity of these characteristics increases.

Keywords: radio-location, radar methods, meteorological formations, remote sensing, methods of differential radar reflectivity, attenuation, shear, reflectivity.