Morrison, KeithEdwards-Smith, AlexanderZwieback, SimonHajnsek, Irena2019-11-112019-11-112019-11-03Morrison K, Edwards-Smith A, Zwieback S and Hajnsek I. Virtual bandwith SAR (VB-SAR) for centimeter-scale vertical profiling through a soil at C-band from space. In: 2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Beijing, 10-15 July 20162153-7003https://doi.org/10.1109/IGARSS.2016.7730935http://dspace.lib.cranfield.ac.uk/handle/1826/14706The 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.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/virtual bandwith SAR schemevirtual band-with synthetic aperture radarsoil centimeter-scale vertical profilingspace C-band imagessoil subsurface imaginghigh resolution soil backscattering vertical profilesDInSAR imagesConference paper