Deriving forest canopy parameters for backscatter models using theAMAP architectural plant model
Castel, T.; Beaudoin, A.; Floury, N.; Le Toan, T.; Caraglio, Y.; Barczi, J.F.
Geoscience and Remote Sensing, IEEE Transactions on
Volume 39, Issue 3, Mar 2001 Page(s):571 - 583
Digital Object Identifier 10.1109/36.911115
Summary:A new approach using an architectural plant model to feed various
theoretical scattering models is presented as a better interpretation of
future remote sensing data acquired over natural media. The method is
based on the architectural plant model (AMAP), which integrates
knowledge of botanical growth processes and real plant measurements.
AMAP is encapsulated in a flexible interface software called AMAP2SAR
that allows one to (1) simulate a three-dimensional (3-D) plant such as
a tree, (2) transform the tree into a collection of cylinders, and (3)
feed theoretical models such as radiative transfer (RT) models. The
method is illustrated by an example of Austrian black pine plantations
in southern France. Simulated characteristics of black pines are
validated for stands up to 50 years old and for a given environment. The
results show the ability to derive classical forest parameters as well
as those needed for electromagnetic models (such as geometry) as a
function of age. Vertical profiles of canopy elements are derived and
point out the vertical heterogeneity of the stands after they are 20
years old for parameters having an impact on the backscatter such as
diameter and number of branches. Consequently, the crown layer
variability with age and canopy depth should be considered in RT models.
An RT model is modified in order to take account of accurate canopy
descriptions and deal with encouraging modeling results at Cand L-band
over the same test site
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