Title :
Decorrelation of backscattered signal due to soil moisture changes
Author :
Nesti, G. ; Tarchi, D. ; Rudant, J.P.
Author_Institution :
JRC, IRSA, Ispra, Italy
Abstract :
The decorrelation of the backscattered signal from a sample of sand on dependence of surface moisture conditions has been measured in the frequency band 2-12 GHz, at three incidence angles (18°, 23° and 25°) and for two types of surface profiles. The signal is well correlated between dry and wet conditions and a coherent phase shift can be estimated. The phase shift is bounded to a limited range (<90°) in the whole frequency band and it can be interpreted as the effect of the change of dielectric properties on the reflection coefficient of the surface
Keywords :
backscatter; electromagnetic wave scattering; geophysical techniques; hydrological techniques; moisture measurement; polarimetry; radar cross-sections; radar polarimetry; remote sensing by radar; sand; soil; 2 to 12 GHz; backscattered signal; coherent phase shift; decorrelation; dielectric properties; incidence angle; reflection coefficient; sand; soil moisture changes; surface moisture condition; Decorrelation; Frequency measurement; Moisture measurement; Phase estimation; Phase measurement; Polarization; Rough surfaces; Soil measurements; Soil moisture; Surface roughness;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International
Conference_Location :
Firenze
Print_ISBN :
0-7803-2567-2
DOI :
10.1109/IGARSS.1995.524098
