T. Castel et al., Deriving forest canopy parameters for backscatter models using the AMAP architectural plant model, IEEE GEOSCI, 39(3), 2001, pp. 571-583
Citations number
40
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
A new approach using an architectural plant model to feed various theoretic
al scattering models is presented as a better interpretation of future remo
te sensing data acquired over natural media. The method is based on the arc
hitectural plant model (AMAP), which integrates knowledge of botanical grow
th processes and real plant measurements. AMAP is encapsulated in a flexibl
e interface software called AMAP2SAR that allows us to 1) simulate a three-
dimensional (3-D) plant such as a tree, 2) transform the tree into a collec
tion of cylinders, and 3) feed theoretical models such as radiative transfe
r (RT) models. The method is illustrated by an example of Austrian black pi
ne plantations in southern France. Simulated characteristics of black pines
are validated for stands up to 50 years old and for a given environment. T
he results show the ability to derive classical forest parameters as well a
s 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 parame
ters having an impact on the backscatter such as diameter and number of bra
nches. Consequently, the crown layer variability with age and canopy depth
should be considered in RT models. Thus, in quoted and joint papers, an RT
model is modified in order to take account of accurate canopy descriptions
and deal with encouraging modeling results at C- and L-band over the same t
est site.