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Verification of the Virtual Bandwidth SAR Scheme for Centimetric Resolution Subsurface Imaging From Space
- Publication Year :
- 2018
-
Abstract
- 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.
- Subjects :
- Synthetic aperture radar
010504 meteorology & atmospheric sciences
0211 other engineering and technologies
02 engineering and technology
01 natural sciences
law.invention
Ground penetrating radar
spaceborne radar
Soil
Image resolution
law
Radar imaging
Electrical and Electronic Engineering
Radar
Water content
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Remote sensing
Bandwidth (signal processing)
Interferometry
Ground-penetrating radar
General Earth and Planetary Sciences
Geology
Bandwidth Ground penetrating radar (GPR)
Subjects
Details
- Language :
- German
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....01084f7216f963c5e7a76d2eb5f205f4