A method of improving quality of calculated image for large rotating angle

The present paper deals with the methods of modeling radar echo data of an object on a rotating platform with physical optics (PO) method in the case of large rotating angle. The echo data are directly calculated in Cartesian coordinate system of spatial frequency and processed with two-dimensional fast Fourier transform (2D-FFT) to obtain the image of the object. The quality of the resulting image is much better than images obtained using the data calculated in polar coordinate system and interpolated to the Cartesian coordinate distribution before performing 2D-FFT.