NDLI: Soil moisture retrieval using the Danish L- & C-band polarimetric SAR

Content Provider	IEEE Xplore Digital Library
Author	Jiankang Ji van der Keur, P. Thomsen, A. Skriver, H.
Copyright Year	1996
Description	Author affiliation: Dept. of Electromagn. Syst., Tech. Univ., Lyngby, Denmark (Jiankang Ji)
Abstract	Danish polarimetric SAR data have been applied to estimate soil moisture (SM). The preliminary results evaluated with the L- and C-band SAR data acquired at the Danish test site Foulum during a number of missions in 1994 and 1995 are presented. In situ data have been collected during the SAR missions and the variations of SM at field scale are discussed. The integral equation method (IEM), the Dubois empirical model and the Oh polarized-ratio model have been used as algorithms to inverse SM from polarimetric SAR data under near bare field conditions. Comparisons between the inversions and the in situ measured data showed that the Dubois empirical model gave the best results for inversion of SM. The standard deviations between the inversed and the measured data at C-band are s(m/sub u/)=6.1% for SM and s/sub /spl sigma//=0.37 cm for soil surface rms height, respectively. C-band data are better than L-band data for estimation of surface roughness.
Starting Page	1300
Ending Page	1302
File Size	348641
Page Count	3
File Format	PDF
ISBN	0780330684
DOI	10.1109/IGARSS.1996.516643
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-05-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil moisture Samarium Soil measurements Rough surfaces Surface roughness Testing Integral equations Polarization Measurement standards L-band
Content Type	Text
Resource Type	Article

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