Click on image to view larger version.
Fig. 5. Influence of the thickness h of the air-to-soil transition zone on the soil reflectivity for different assumptions about the shape of the water content profiles in 0 
z 20 mm (dotted and dashed lines of the insets). The calculations were performed for typical water content profiles (a) 
dry and (b) wet as observed under dry and wet conditions (Fig. 10). For comparison, the radiometrically observed soil reflectivities Rradio, dry and Rradio, wet are also indicated. The relationship between the height variance 
and the transition zone thickness h is given by Eq. [15].
