-:588 - 
Further examples of reflectance factor curves determined 
by in situ measurements with our instrumentation are 
discussed in papers of A. Kadro and W. Fischer /3/, /]4/. 
| One of the objectives of our investigations is the selection 
| of suitable spectral channels for scanners. Although we 
| feel that our experience is till too limited to make well 
founded recommendations we propose the following bands in 
the wavelength region from 400 to 1100 nm (see Figure 113: 
  
T 1 T 1 
| 
AG 
sa Sp = 45° ZA 1 
re x << 
9 2; 180? 7 N 
A N 
40 F | 
27 May 1977 Z A SS 
{young ) 
30 } Si 26° AA S 
20 F 
3l Aug. 1977 
40 L ( bdtore harvest) 
SPECTRAL REFLECTANCE FACTOR / X 
  
  
  
  
S00 600 700 
WAVELENGTH / NM 
Fig. ll 
- Band 530-570 nm which straddles the green hump of the 
reflection spectrum at 550 nm. 
- Band 640-690 nm in the chlorophyll absorption region, 
before the reflectance of vegetated surfaces generally 
rises to very high values. 
- Band 830-890 nm in the near infrared plateau of the 
spectrum, before the absorption bands of water contained 
in the leaves occur. 
  
  
| - Band 680-720 nm at the beginning of the steep rise of the 
reflectance factor curve in the infrared. There are 
indications of a shift in wavelength and amplitude in 
the course of the vegetation cycle and for stress 
conditions so that a comparison of the signal in this 
band with the foregoing ones could help for a better 
differentiation.