Synthetic aperture radar (SAR) images have proved to be useful for a variety of land-use analysis tools, ranging from ice-flow monitoring to flood-damage assessment. SAR images can also be used to derive terrain elevations, thereby greatly increasing their utility. The computation of height information from SAR images is usually accomplished from a stereo pair or an interferometric pair. These two algorithmically different approaches each has its unique strengths and weaknesses, but one feature they share is the need for two SAR images. THe algorithm presented in this paper requires only a single SAR image, from which terrain information is extracted. A brief outline of the signal- processing algorithm will be presented. It will be clearly shown how our new approach differs from previously presented approaches. Data collected from the shuttle imaging radar-C (SIR-C) over the Lucky Rise area of the Mohave Desert will be used to assess the performance of our new signal- processing algorithm. A detected image will be shown that contains height variation of greater than 500 meters. A new terrain map will be generated by our algorithm and a contour map made from the terrain map. It will be shown that overlaying the resulting contour map on top of the detected image greatly increases the utility of the SIR-C image.
Charles R. Guarino,
"Enhancement of SIR-C imagery with the addition of height data", Proc. SPIE 2847, Applications of Digital Image Processing XIX, (14 November 1996); doi: 10.1117/12.258239; https://doi.org/10.1117/12.258239