Team 1: Sparse Aperture Imaging
Monday, August 1, 2005 - 9:40am - 10:00am
D. Gregory Arnold (US Air Force Research Laboratory)
Standard 2-D SAR image formation techniques require data samples that have been collected on a regular rectangular grid (with respect to the viewpoint). A target that happened to move through the imaged scene will be displaced and smeared across the final image. Imaging a moving target is equivalent to collecting data that is not on a regular grid (although more generally this generates data in a cube, rather than data in a square). Surprisingly little is understood about how to form an image in this more general case. This topic encompasses a myriad of research areas. One starting point would be to use standard scattering center models to predict the scattering at new locations. This approach requires the ability to extract viewpoint stable features from the measured data. Filtering, tracking, and dynamic programming are key elements to this approach. Alternately, knowing the final product is a 3D image, it may be possible produce the end result without requiring explicit feature extraction. Data will be available to test newly developed approaches.