Imaging using Synthetic Aperture Radar

M V, Pavan Kumar and Jana, Soumya and Jampana, Phanindra Varma (2017) Imaging using Synthetic Aperture Radar. Masters thesis, Indian Insitute of Technology Hyderabad.

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Abstract

Synthetic Aperture Radar (SAR) is a coherent radar system which utilizes the flight path of the platform to simulate an extremely large antenna aperture synthetically providing high resolution images of large terrain. The aim of this work is to obtain a computationally less costly imaging algorithm to synthesize a 2D and 3D images from corresponding SAR data. In order to achieve this we adopted a interpolation free frequency domain method called Range Stacking. This imaging method forms the target function at individual range bins within the radar range swath which are then stacked together to form final image, hence, it is called range stacking. The algorithm has been applied for 2D point targets as well as 2D terrain images for different squints, look angles and the results are presented. The results show that the range stacking algorithm can provide accurate reconstruction even for very high squint angles. Also a 3D imaging algorithm which is an extension of 2D range stacking algorithm is discussed along with mathematical formulation.

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