A circular aperture synthesis for tomography

The object of consideration is a circular trajectory aperture synthesis at short distance from the plant for the purposes of coherent tomography. This research requires the plant to be lighted by continuous monochromatic non-modulated signal. The process of circular aperture synthesis reduces to convolution of trajectile Doppler signals reflected from the complicated plant being tomographed with the set of reference trajectile Doppler signals reflected from single-point plants situated at different distances from the aperture synthesis center. The readings of cross-correlation function are displayed in Cartesian coordinates after recoding into intensity signals. As a result, one can obtain an image of the plant being tomographed in the plain containing the circular trajectory of aperture synthesis. Then the obtained results are compared with the results of the circular aperture synthesis of rotating plants. The characteristics of the circular aperture synthesis and its connection with the linear aperture synthesis are revealed.