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The relationship between the backscattering coefficient and the biomass of narrow and broad leaf crops

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5 Author(s)
Macelloni, G. ; Istituto di Ricerca sulle Onde Elettromagnetiche, CNR, Firenze, Italy ; Paloscia, S. ; Pampaloni, P. ; Marliani, F.
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The influence of the shape and dimensions of plant constituents on the backscattering of agricultural vegetation is investigated. Multifrequency multitemporal polarimetric data, collected at C- and L-bands by means of airborne and satellite synthetic aperture radar (SAR), showed that the relations between the backscattering of crops and the vegetation biomass depend on plant type, and that there are different trends for “narrow” and “broad” leaf crops. In the latter crops, backscattering increases with an increase in the biomass, especially at L-band. This behavior is typical of media in which scattering is dominant, whereas on “narrow leaf” plants, the trend is flat or decreasing, denoting a major contribution of absorption. Theoretical simulations obtained with a discrete element radiative transfer model have confirmed that a different backscattering of crops with the same biomass may be due to plant geometry

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:39 ,  Issue: 4 )