Оценка анизотропных свойств метеообразований на основе использования кругового деполяризационного отношения

E.V Masalov,N.N Krivin,A.S Rudometova

doi:10.14258/izvasu(2017)4-08

Abstract

In the paper, a question about an estimation possibility of the hydrometeors’ anisotropic properties by using of circle depolarization ratio is considered and discussed. It is known that the factors limiting the efficiency of the circular depolarization ratio method include the pronounced dependence of the method upon the differential phase shift. The last one is introduced by a propagation medium between orthogonal components of electromagnetic wave. On this basis, a determination of the circular depolarization ratio estimation error is carried out. Such an error appears with an additional phase shift between orthogonal components of an electromagnetic wave. When receiving signals with circular polarization states of the right and left rotation direction, a special attention is given to the evaluation of its phase difference variability. Also, an interpretation of given results stands apart as another important question to discuss. The calculation data are presented and analyzed. In particular, an applicability of the signals’ phase difference estimation procedure is illustrated. It is needed for an implementation of probed meteorological formations identification in case of ambiguous situations. It is found that appearance of the phase shift, introduced by the propagation medium, leads to a significant distinction between the measured circular depolarization ratio value and the polarization anisotropy true value of the probed meteorological formations DOI 10.14258/izvasu(2017)4-08

Highlights

Рассматриваются вопросы, связанные с возможностью оценки анизотропных свойств метеообразований и их последующей интерпретацией на основе использования кругового деполяризационного отношения
It is known that the factors limiting the efficiency of the circular depolarization ratio method include the pronounced dependence of the method upon the differential phase shift
The last one is introduced by a propagation medium between orthogonal components of electromagnetic wave

Summary

Introduction

Рассматриваются вопросы, связанные с возможностью оценки анизотропных свойств метеообразований и их последующей интерпретацией на основе использования кругового деполяризационного отношения. It is found that appearance of the phase shift, introduced by the propagation medium, leads to a significant distinction between the measured circular depolarization ratio value and the polarization anisotropy true value of the probed meteorological formations. Однако существенным недостатком ZCDR является его сильная зависимость от эффектов распространения электромагнитной волны, в частности, от дифференциального фазового сдвига, вносимого между ее ортогональными компонентами.

Results

Conclusion