I. V. Lutsenko

Diagnostics of the troposphere refraction by means of the radio settings of the satellites

Proposes a method of estimation of land troposphere refraction using radio setting of navigation satellites of the GPS. Presented design ratio that tie together satellite viewing angle and effective gradients of refraction coefficient in raying troposphere layer is obtained for the equivalent of an Earth radius model. The results of calculation are compared to experimental data which were obtained by satellite setting angles.

Statistical Model of the Signal Scattered from Ground Surface at the Grazing Feed Angles

Using nested half-Markov processes the statistical model of the signal scattered from ground surface is formulated. And on basis of experimental data the parameters ingressed into model are determined.

Use doppler radars for studying turbulence of air weights in storm clouds

The method of estimation of the turbulent pulsations of the air weights velocity in the storm clouds by the spectrums of the scattered signals is produced in this project. Using the first moment of the characteristics of the scattered signal spectrum one can estimate shifted characteristics of the air stream, and using the second moment one can estimate velocity spread of the scatterers strictly connected with the dispersion of the stream fluctuations inside the cloud.

Polarization-Angle Dependencies of Backscattering from Ship Waves

Angle dependencies of the RCS and spectrums of scattering from ship waves on the different polarizations are studied experimentally.

Backscattering Polarization-Spectral Specific Features in Determining Movement Direction of Objects

A possibility has been demonstrated experimentally that directions of moving objects relative to radars may be determined according to the sign of the derivative of the scattered signal crosscorrelation function on parallel and orthogonal polarizations.

On the Phase Centers of the Scattering of Compound Shape Bodies in SHF and Short-Wave Ranges

In this paper the results of the experimental study of the polarization features of the backscattering from the compound shape bodies are presented that could be used for their recognition and their course determination as well. The investigations were carried out using the polarimetric coherent systems of the pulse as well as CW transmitting modes of the millimeter wave band. For the study of the phase parity between the elements of the scattering polarization matrix for the polarimeters utilizing the CW mode transmitting the polarization selectors were developed that provides not only orthogonally polarized component expansion of the received signal and the heterodyne signal injection to the working channel having equal phases as well. In the pulse radar polarimeters we used the pulse-by-pulse switching of the receiving signal polarization and alignment of the electrical length of the signal injection and heterodyne ducts in the channels having orthogonally polarized components.

Application of Pendulum Swing Model for Explanation of Radiowaves Backscattering from Biological Objects in SHF and HF Wavebands

In this paper, the model considering biological object motion, which allows explaining the peculiarities of scattered signals spectra, which are caused by their frequency modulation are proposed. The approach proposed allows formulating information features in order to distinguish reflection from human and animals

Study of microwave field structure on water surface paths using radar and moving corner reflector

Considered in this paper is the method of determination of vertical coordinate of corner reflector which is based on measurement of Doppler frequency displacement of signals, scattered by the reflector. The method is based on restoration of vertical profile of field structure. Possibility of determination of reflecting points quantity, their coordinates and lifetime on diffusive scattering sea surface using spectral analysis of the signal received are examined