METHOD OF OBTAINING TWO-DIMENSIONAL RADAR IMAGE OF OBJECT IN WIDE RANGE OF VARIATION OF VALUES OF EFFECTIVE SCATTERING AREA OF LOCAL CENTRES DURING MULTIFREQUENCY PULSED PROBING Russian patent published in 2009 - IPC G01S13/89 

FIELD: physics.

SUBSTANCE: invention can be used for obtaining a two-dimensional radar image of an object in a wide range of variation of effective scattering area (ESA) of scattering centres (SC) of the object. The radar image of the object is obtained based on a processing method using Fourier transformation of complex envelopes of signals reflected from the object, obtained during multifrequency pulsed probing of a revolving object. The result is achieved due to high-precision measurements of the carrier frequency during multifrequency pulsed probing of the object, the azimuth angle of the object during its revolution, coordinates of the synthesising centre on the object, as well as due to use in the synthesis algorithm of a reference focusing function, spatial frequencies and coordinates of scattering centres in the coupled reference system, determination of values coordinates and effective scattering area of scattering centres with large values of the effective scattering area in the first synthesis of the radar image, verification of these values from the minimum of the energy function of the matrix of complex envelopes, correction of the initial matrix of complex envelopes by excluding information on scattering centres with large values of effective scattering area, repeated synthesis with the corrected matrix to obtain a radar image with scattering centres with small values of effective scattering area.

EFFECT: increased resolution of scattering centres and accuracy of determining coordinates and effective scattering area of scattering centres in a wide range of variation of the effective scattering area of scattering centres.

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