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Multi-Antenna SAR Tomography Using Superresolution Techniques by Ludwig Rößing,; Joachim H. G. Ender, is a Engineering article available to read on EtoBox.

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Classical SAR interferometry provides a two-dimensional image of the surface together with a pixel-to-pixel measurement of the elevation angle of that pixel with respect to the radar antenna. The elevation angle can be transformed to a height estimate for each pixel yielding a digital elevation map. This assumes that the scattering points are distributed over a two dimensional surface and that for each azimuth-range resolution cell there is only one elevation angle. In this paper, we look for solutions for those cases, in which this assumption is invalid, i.e. where there are multiple point-like scatterers with distinct elevation angles in a single resolution cell. Using a parametric approach these distinct elevation angles can be estimated simultaneously. Since for single-pass interferometry the height resolution is mostly poor because of the limited baseline, we want to apply superresolution to get an appropriate height resolution. To achieve imaging also along the third dimension we propose a calculation of an a posteriori marginal distribution of the elevation angle. This approach is illustrated by simulation results and with airborne SAR data from the multi-channel X-band syst

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Author

Ludwig Rößing,; Joachim H. G. Ender,

Publisher

Walter de Gruyter GmbH

Published

2001

Language

EN

Field

Engineering (Physical Sciences)