Frequency scaling algorithm(FSA) is generally used as a spotlight synthetic aperture radar(SAR) processor. FSA can directly process dechirped raw data. However, the plain algorithm itself is purposed for a single target because the formula of the algorithm is for a target. This paper presents a method to process a sliding spotlighted scene with FSA. Extended frequency scaling algorithm(EFSA) is used for focusing a point target in this paper [3]. In order to get a focused scene of high quality image, effective velocity and Doppler centroid need to be very accurate for each target. Test has been done with a step steering sliding spotlight simulated raw data.
['Donghyun Kim', 'Jung-Hoon Keum', 'Moon-Gyu Kim', 'Sung-Woong Ra']
Spotlight SAR processor by using extended frequency scaling