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Virtual bandwith SAR (VB-SAR) for centimeter-scale vertical profiling through a soil at C-band from space

Morrison, K., Edwards-Smith, A., Zwieback, S. and Hajnsek, I. (2016) Virtual bandwith SAR (VB-SAR) for centimeter-scale vertical profiling through a soil at C-band from space. In: Geoscience and Remote Sensing Symposium (IGARSS), 2016 IEEE International, 10-15 July 2016, Beijing, China, pp. 7419-7422,

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To link to this item DOI: 10.1109/IGARSS.2016.7730935


The first experimental demonstration of the Virtual Bandwidth SAR (VB-SAR) scheme is provided. VB-SAR is a new technique that promises subsurface imaging of soils at ultra-high, centimeter-scale resolution at large stand-off distances applicable to aircraft and spacecraft. This paper reports on how a stack of C-band images were used to retrieve high resolution vertical profiles of the backscattering through a soil in the laboratory. The VB-SAR scheme captures the phase behavior of a soil across a stack of DInSAR images as the soil dries. The real frequency of the interrogating radar behaves as a higher, virtual frequency within the soil by virtue of its higher-than-air dielectric. As the dielectric changes with time, the DInSAR stack captures a virtual bandwidth. Using this scheme, it was possible to produce a vertical slice of the backscatter through a soil at 10cm resolution, much improved on the formal 1m resolution offered by the real 150MHz bandwidth.

Item Type:Conference or Workshop Item (Paper)
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:73524

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