Monitoring leaf area of sugar beet using ERS-1 SAR data |
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Authors: | H XU M D STEVEN K W JAGGARD |
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Affiliation: | 1. Department of Geography , University of Nottingham , Nottingham, NG7 2RD, U.K.;2. IACR-Broom's Barn , Higham , Bury St Edmunds, Suffolk, IP28 6NP, U.K. |
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Abstract: | This paper presents the results of field testing a radar model which relates leaf area index to radar backscatter for ERS-1 C-band VV polarization SAR data. Ground truth measurements of leaf area index and soil moisture content were made in selected sugar beet fields, with simultaneous acquisition of ERS-1 SAR image data. Radar backscatter coefficients were derived from the calibrated ERS-1 SAR data. The Leeuwen and Clevers expression of the water cloud model was fitted to determine the in situ relationship between radar back-scatter and leaf area index. The model can be inverted analytically to calculate leaf area index from radar backscatter. The results show considerable potential for the operational application of ERS-1 SAR data in crop monitoring. |
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