ISAR image fusion with two separated aspect observations

Finer image resolution may be obtained with larger accumulated aspect angle for inverse synthetic aperture radar (ISAR), which may be provided by two mono-static ISAR systems. To form finer images with co-planar observations at different aspects, parameters such as the rotating of the non-cooperative moving object and the aspect angle difference between them must be provided. In this paper, a method is proposed to estimate these parameters based on sub-pixel level position extraction of prominent scattering centers on the range-Doppler images. Also, the implementation of the proposed method is introduced, and numeric experiments are provided to demonstrate the effectiveness of the proposed method.