FIG. 5: Water proof package of FIG. 6 : Spectral reflectance 
two EXOTECH for factor measurement 
radiometric sea truth of sea water 
direct light (sun days) cut meadow or 
> diffuse light (claudy days) 0.5 m high grass or 
S 2 |!m high wheat. 
NS 
2m > 
1m 
_L om 
  
  
  
  
FIG.7: Sketch of a goniometric facility for field measurements under controlled conditions