Abstract
Low frequency Radar imaging can be used to reconstruct the global shape of targets using the ramp response technique, which only needs no more than 3 observing angles. We have developed a new algorithm permitting to generate promising shapes of targets for mutually orthogonal directions, but giving distorted results otherwise. To solve this ill-posed inverse problem, we use the level set method, which iteratively deforms the shape of the target under a velocity field, and we analyze the property of the desirable velocity. Numerical results obtained by this method in arbitrary directions are given as well.
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