Abstract
The methods of increasing the size of the radar image obtained by space radars with synthesized aperture in high-resolution mode are analyzed. The image size increase is achieved due to the extended scanning of the antenna beam in the azimuthal plane. The basis of the considered methods is the classical searchlight mode. The modes of composite (multi-frame) searchlight shooting and sliding searchlight shooting are compared. The dependences of azimuthal resolution and frame size on the size of the scanning sector are estimated. Numerical examples are based on the parameters of COSMO-SkyMed and TerraSAR-X radars. A list of the main ways to increase scanning is provided. A brief description of the Staring Spotlight mode is given, as an example, which allows to significantly increase the detail and quality of images.
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