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Verification of the Virtual Bandwidth SAR Scheme for Centimetric Resolution Subsurface Imaging From Space

Edwards-Smith, Alexander and Morrison, Keith and Zwieback, Simon and Hajnsek, Irena (2018) Verification of the Virtual Bandwidth SAR Scheme for Centimetric Resolution Subsurface Imaging From Space. IEEE Transactions on Geoscience and Remote Sensing, 56 (1), pp. 25-34. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2017.2717340. ISSN 0196-2892.

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This paper presents the first experimental demonstration of the virtual bandwidth synthetic aperture radar (VB-SAR) imaging scheme. VB-SAR is a newly developed subsurface imaging technique which, in stark contrast to traditional close proximity ground penetrating radar schemes, promises imaging from remote standoff platforms such as aircraft and satellites. It specifically exploits the differential interferometric SAR (DInSAR) phase history of a radar wave within a drying soil volume to generate high-resolution vertical maps of the scattering through the soil volume. For this study, a stack of C-band vertically polarized DInSAR images of a sandy soil containing a buried target was collected in the laboratory while the soil moisture was varied--first during controlled water addition, and then during subsequent drying. The wetting image set established the moisture-phase relationship for the soil, which was then applied to the drying DInSAR image set using the VB-SAR scheme. This allowed retrieval of high-resolution VB-SAR imagery with a vertical discrimination of 0.04 m from a stack of 1-m vertical resolution DInSAR images. This paper unequivocally shows that the basic principles of the VB-SAR technique are valid and opens the door to further investigation of this promising technique.

Item URL in elib:https://elib.dlr.de/116236/
Document Type:Article
Title:Verification of the Virtual Bandwidth SAR Scheme for Centimetric Resolution Subsurface Imaging From Space
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Edwards-Smith, Alexandercranfield university, ukUNSPECIFIEDUNSPECIFIED
Morrison, Keithuniversity of reading, ukUNSPECIFIEDUNSPECIFIED
Date:January 2018
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 25-34
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:Elsevier
Keywords:Soil, Radar imaging, Synthetic aperture radar, Image resolution, Ground penetrating radar, Bandwidth Ground penetrating radar (GPR), spaceborne radar
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Security-relevant Earth Observation
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Radzuweit, Sibylle
Deposited On:29 Nov 2017 09:35
Last Modified:08 Mar 2018 18:35

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