Dielectric Constant Modelling with Soil-Air Composition and Its Effect on Sar Radar Signal Backscattered over Soil Surface

被引：11
|
作者：
Zribi, Mehrez [1 ,2 ]
Le Morvan, Aurelie [1 ]
Baghdadi, Nicolas [3 ]
机构：
[1] CNRS, IPSL, CETP, F-78140 Velizy Villacoublay, France
[2] IRD CESBIO, F-31401 Toulouse 9, France
[3] Irstea, UMR TETIS, F-34093 Montpellier 5, France
来源：
SENSORS | 2008年 / 8卷 / 11期
关键词：
dielectric constant; radar; moisture; modelling;
D O I：
10.3390/s8116810
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The objective of this paper is to present the contribution of a new dielectric constant characterisation for the modelling of radar backscattering behaviour. Our analysis is based on a large number of radar measurements acquired during different experimental campaigns (Orgeval' 94, Pays de Caux' 98, 99). We propose a dielectric constant model, based on the combination of contributions from both soil and air fractions. This modelling clearly reveals the joint influence of the air and soil phases, in backscattering measurements over rough surfaces with large clods. A relationship is established between the soil fraction and soil roughness, using the Integral Equation Model (IEM), fitted to real radar data. Finally, the influence of the air fraction on the linear relationship between moisture and the backscattered radar signal is discussed.
引用
收藏
页码：6810 / 6824
页数：15
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