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000172371 1001_ $$0P:(DE-Juel1)129478$$aJonard, Francois$$b0$$eCorresponding Author$$ufzj
000172371 245__ $$aEstimation of the hydraulic properties of a sand using ground-based passive and active microwave remote sensing
000172371 260__ $$aNew York, NY$$bIEEE$$c2015
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000172371 520__ $$aIn this paper, we experimentally analyzed the feasibility of estimating soil hydraulic properties from 1.4 GHz radiometer and 0.8–2.6 GHz ground-penetrating radar (GPR) data. Radiometer and GPR measurements were performed above a sand box, which was subjected to a series of vertical water content profiles in hydrostatic equilibrium with a water table located at different depths. A coherent radiative transfer model was used to simulate brightness temperatures measured with the radiometer. GPR data were modeled using full-wave layered medium Green's functions and an intrinsic antenna representation. These forward models were inverted to optimally match the corresponding passive and active microwave data. This allowed us to reconstruct the water content profiles, and thereby estimate the sand water retention curve described using the van Genuchten model. Uncertainty of the estimated hydraulic parameters was quantified using the Bayesian-based DREAM algorithm. For both radiometer and GPR methods, the results were in close agreement with in situ time-domain reflectometry (TDR) estimates. Compared with radiometer and TDR, much smaller confidence intervals were obtained for GPR, which was attributed to its relatively large bandwidth of operation, including frequencies smaller than 1.4 GHz. These results offer valuable insights into future potential and emerging challenges in the development of joint analyses of passive and active remote sensing data to retrieve effective soil hydraulic properties.
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000172371 7001_ $$0P:(DE-Juel1)129553$$aWeihermüller, Lutz$$b1$$ufzj
000172371 7001_ $$0P:(DE-HGF)0$$aSchwank, Mike$$b2
000172371 7001_ $$0P:(DE-HGF)0$$aJadoon, K. Z.$$b3
000172371 7001_ $$0P:(DE-Juel1)129549$$aVereecken, Harry$$b4$$ufzj
000172371 7001_ $$0P:(DE-HGF)0$$aLambot, Sébastien$$b5
000172371 773__ $$0PERI:(DE-600)2027520-1$$a10.1109/TGRS.2014.2368831$$n6$$p3095 - 3109$$tIEEE transactions on geoscience and remote sensing$$v53$$x0018-9413$$y2015
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