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- W2901498422 abstract "The rotational invariance of SAR geometry when acquisition trajectory is linear is instrumental to the insensitivity of the focusing with target elevation. In case of circular - or more generally non-linear - acquisition trajectory or turntable measures, focusing becomes increasingly sensitive to elevation, and it is often envisioned to use “autofocus in elevation” as a low cost alternative to tomography to derive the altitude of scatterers in a not planar target. The determination of this altitude would allow both an accurate focusing of the scatterers and their correct positioning for multilook image formation (the “frame-drift” analogy links the multilook matching and the focusing issues, hence also the “along track stereo” possibility in circular SAR). Practical limitations of this approach, namely horizontal edge reflection, trajectory near-linear segments, specular echoes on curved surfaces and multiple reflections are illustrated on very high bandwidth airborne circular SAR at X-band. CLEAN-like versus contrast maximisation approaches possibly combined with along-track stereo are assessed for this purpose." @default.
- W2901498422 created "2018-11-29" @default.
- W2901498422 creator A5020711782 @default.
- W2901498422 date "2018-07-01" @default.
- W2901498422 modified "2023-09-23" @default.
- W2901498422 title "Circular Sar Imaging of Not Planar Targets. Limitations of the “Height from Focus” Paradigm" @default.
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- W2901498422 doi "https://doi.org/10.1109/igarss.2018.8518003" @default.
- W2901498422 hasPublicationYear "2018" @default.
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