56 
Relative spectral reflectance 
3,50 
3.00 
2.50 
2.00 
1.50 
1,00 
500 
700 
900 
1100 
1300 
1500 
1700 
Wavelength (nm) 
Figure 5 - Ratio of surface reflectance at A. divided by that at 550nm. Error bias represent ± the standard 
deviation for different measurements in a 2 x 2 km^ area in Algeria 5 
o 
CL 
View angle (in °) 
Figure 6 - Degree of polarization in the principal plane versus the view angle at 3 wavelengths (:450nm, 
V :650nm, o:850nm) for a solar angle of 56°. The computations (full lines) correspond to a Junge size 
distribution for the aerosols.