The Pyla dune experiment: sub-surface moisture detection by combining GPR and airborne SAR

Details The Pyla dune experiment: sub-surface moisture detection by combining GPR and airborne SAR The Pyla dune experiment: sub-surface moisture detection by combining GPR and airborne SAR

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.475..171p&link_type=abstract

In: Proceedings of the Third International Symposium on Retrieval of Bio- and Geophysical Parameters from SAR Data for Land Appl

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Soils, Hydrology

Scientific paper

We study the penetration capabilities of low frequency SAR, particularly L and P-bands, for the mapping of sub-surface moisture in arid areas. Our experiment site is the Pyla dune, a bare sandy area following high signal penetration and presenting large sub-surface wet structures a varying depths. The SAR penetration depth is estimated by inverting a scattering model for which the sub-surface structure geometric and dielectric properties are determined by the GPR data analysis. We observed a specific phase difference between HH and VV channels, due to a wet layer covered by dry sand. A flight of the new RAMSES P-band facility was performed recently: such a low frequency SAR should be able to detect sub-surface moisture down to at least ten meters.

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