A. Averyanov

Polarization signal components estimate in weather radar

New approach to use polarimetry for turbulence intensity estimate is proposed. It is based on estimation of the energetic characteristics of turbulent polarization spectrum. The proposed approach can be realized as a radar system that allows estimating the energetic characteristics of a set of polarization components of the received radar signal. The layout of a radar system for polarization components estimation is developed. Such approach can increase the informativity of weather radar systems relatively to obtaining information about factors that are the origin of changing polarization of reflected signal.

The approach to estimating critical wind speed in liquid precipitation using radar polarimetry

In this paper, forces and processes in the atmosphere that lead to drop deformation and vibration are considered. The expression that allows to define the reflected radar signal power redistribution between electromagnetic wave polarization components received with orthogonal antennas of Doppler-Polarimetric radar is given. It is shown that the drop fission into two parts takes place at the moment when additional drop surface tension equals zero. This is used to calculate the critical wind speeds for drops of corresponding sizes and use them when wind related phenomena estimate with polarization characteristics of radar signal.

Connection of reflected radar signal with liquid-hydrometeor deformation rate

In this paper forces and processes in the atmosphere that lead to drop deformation and vibration are considered. The expression that allows to define the reflected radar signal power redistribution between electromagnetic wave polarization components received with orthogonal antennas of Doppler-Polarimetric radar is obtained. The expression can be useful for creating turbulence intensity values scale when wind related phenomena estimate with polarization characteristics of radar signal.

The estimate of instantaneous power of polarization spectrum components in polarmetric weather radar

New approach to use polarimetry for turbulence intensity estimate is proposed. It is based on estimation of the energetic characteristics of turbulent polarization spectrum. Such approach can increase the informativity of weather radar systems relatively to obtaining information about factors that are the origin of changing polarization of reflected signal.

Ambiguity of droplet fission and its resolution using Doppler-polarimetric signal processing in meteorological radar

In this paper the different situations in the atmosphere that lead to the drop fission are considered. The approach to resolve the ambiguity of droplet fission using Doppler-polarimetric radar is presented.

Statistical estimation of polarimetric method potential for dangerous turbulence detection in rain

In this paper the polarimetric approach for wind phenomena detection and study is proposed and analyzed. The polarimetric estimation of turbulence intensity is made with single unipolarized antenna radar system. The statistical estimation of proposed method is made.

Dynamics of drop polarization basis under atmospheric factors influence

In this paper we analize the influence of dynamic atmospheric phenomena on drops behavior. Then we discuss possibility to connect reflected signal characteristics with scatterer polarization basis taking into account polarization features of electromagnetic wave. Information about drop polarization basis helps to improve data analysis and interpretation about atmospheric state and processes including wind related phenomena when signal processing.

Correction of Radar Signal on Elevation Angle when Reflecting from Turbulent Zone

In this paper the analytical expression for correction on elevation angle of a radar signal is obtained. The comparison of the data of mathematical modeling with known experimental data of the same character is made.

Reflected signal depolarization estimate with single transceiving antenna

In this paper the approach to estimate reflected signal depolarization due to turbulence with a single unipolarized antenna is considered. The approach allows to make estimate by current amplitude fluctuation in the receiving antenna due to changing the depolarization angle of reflected wave. The frequency characteristics of the sounding wave reflectors under the wind influence are analyzed and taken into account.