809 
) in the 
ing was the 
each site. 
:rowns 
Dne at 
The 
ts, because 
=vation 
that the 
se distance 
e greatest 
high 
d deviation 
hat this is 
n and even 
igher 
ies 
d that this 
(biomass) 
e observa- 
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signates 
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ew angles 
vely 
rts of the 
ds in 
al ity and 
ectance 
ndicates 
¡pecies is a 
5W 
'om the 
itions such 
iem is fur 
cation. To 
1 quantity 
ition and 
less in 
2 angle 
FIG. 2 
30° 60° 90° 
Sun Azimuth 
1 20 £ 
1 50' 
1 80 c 
400 500 600 700 800 
Wavelength (nm) 
900 1000