Laboratory demonstrations of interferometric and spotlight synthetic aperture ladar techniques

Interferometric Synthetic Aperture Sonar

Interferometric Synthetic Aperture Sonar (ISAS) offers the possibility of high resolution, three-dimensional images of objects on the ocean floor. The height of objects is identified from the phase difference between two synthetic aperture images of the object obtained using two receivers separated by a short distance. A central problem is the need to unwrap the phase difference in the presence...

Interferometric Synthetic Aperture Radar

This paper provides a brief review of interferometric synthetic aperture radar (InSAR), its history, the theory, and design / implementation / processing issues. Along-track, single-pass and repeat-pass cross-track interferometry are reviewed. Specific topics addressed include error sources and phase-unwrapping techniques. Several examples of InSAR applications are presented. Introduction For y...

A Comparison of Spotlight Synthetic Aperture Radar Image Formation Techniques

Spotlight synthetic aperture radar images can be formed from the complex phase history data using two main techniques: 1) polar-to-cartesian interpolation followed by twodimensional inverse Fourier transform (2DFFT), and 2) convolution backprojection (CBP). CBP has been widely used to reconstruct medical images in computer aided tomography, and only recently has been applied to form synthetic a...

Synthetic Aperture Ladar for Tactical Imaging

Understanding how the brain works and reproducing its central capabilities in computers is arguably one of the greatest problems in science and engineering. This project directly contributes to this challenge from both a mathematical and an applied point of view. In particular, we have developed a mathematical description of a family of hierarchical architectures for learning, comprised of a co...

(ct)Interferometric Synthetic Aperture Microscopy