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.