ISAR Cross-Range Scaling for a Maneuvering Target

The present invention relates to a method of scaling a vertical distance of an ISAR image for a maneuvering target. The method of scaling a vertical distance of an ISAR image for a maneuvering target according to the present invention can perform vertical distance scaling by estimating a rotation speed of a target using two sequential inverse synthetic aperture radar (ISAR) images. Specifically, the method of scaling a vertical distance of an ISAR image for a maneuvering target includes steps of: extracting a pair of scatterers strong on a change in a measurement angle by applying a scale invariant feature transform (SIFT) to each of the two ISAR images sequentially formed; setting a cost function using a point that a distance between the extracted scatterers and the rotation centers of the targets in the images; and estimating a rotation speed of the maneuvering target without information on rotation center through particle swarm optimization (PSO) coupled with an exhaustive search method. Therefore, the method of scaling a vertical distance of an ISAR image for a maneuvering target can allow a user to check information on scattering of a target in a distance direction and a vertical distance direction.