Title :
Modeling Forest Emissivity at L-Band and a Comparison With Multitemporal Measurements
Author :
Della Vecchia, A. ; Ferrazzoli, P. ; Wigneron, J.-P. ; Grant, J.P.
Author_Institution :
Rome Univ., Rome
Abstract :
This letter describes recent advances in modeling forest emissivity at L-band. The formulation is based on a previously developed discrete model and includes a new representation of forest litter. Comparisons with multitemporal radiometric data collected in the framework of the ldquoBray 2004rdquo experiment, which was carried out within Les Landes forest, are shown and discussed. Input variables are given by using detailed ground measurements. In general, the model reproduces both absolute values and temporal variations of measured brightness temperature. The contribution of the litter to overall emission was found to be important.
Keywords :
moisture; soil; vegetation; Bray 2004 experiment; L-band; Les Landes forest; brightness temperature; discrete model; forest emissivity modeling; forest litter; ground measurements; multitemporal radiometric data; temporal variations; Brightness temperature; Electromagnetic modeling; L-band; Microwave radiometry; Poles and towers; Radiometers; Soil measurements; Space technology; Temperature measurement; Testing; Forests; litter; microwave radiometry; soil moisture;
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2007.900687
