Interferometric synthetic aperture radar

Interferometric synthetic aperture radar provides a means of deriving high-resolution three-dimensional radar images of a target scene. This has applications both from satellites for remote sensing purposes, and from aircraft for military surveillance. The technique is also applicable to synthetic aperture sonar systems, for applications such as oil wellhead inspection and minehunting. This paper reviews the principles of these techniques, illustrating them with examples of results, and looks at the prospects for the future.