changing 
he factor 
shown in 
-In T at 
thickness 
nts. 
T). 
versity of 
obtained 
type and 
ation (3) 
gram for 
e best fit 
deviation 
figure for 
maritime 
uring the 
à be 1. 
sols may 
  
  
Manfred Schroeder 
  
have occured [8]. In spite of this indication for continental aerosols the 
6S-modelling. 
  
maritime aerosol type was used for the 
  
   
  
  
  
  
  
  
  
  
  
  
2000 : ipe : ! 
6S-29 06.98-12.50 _UTC-continental" « 
"68-29.06.98-12:30. UTC-mantime" + 
ES — 1500 ow | 
— 
© x * 
= ha 
> i 
= > 
>: 000 | 
a 
= 
E 
S 500 | : _ 
0 | 1 l 1 1 | 
300 400 500 600 700 800 900 
wavelength [nm] 
100€ 
Fig.8: Comparison of measured irradiance (solid line -) at 12:30 GMT with optical thickness t=0.4 and 
computed irradiances with continental (0) and maritime (+) aerosol type. 
  
   
   
  
  
  
  
  
  
1600 — 
A o "02-07-98.global.10:48" ——- 
; PO 1" a "68-02.07.98-10:50_UTC-maritime" © 
1400 - f om - J 
j ^. 
1200 + i - 4 
= m 
Ë ¥ | 4 
E 1000 r ; = 
* FI 
& f 
= 800 }+ lj - 
E p 
o if 
2 2 i 
3 600 | j 4 
3 j d 
S i i 
B ' 
400 F e | " 
| 
LN 
200 + uU 
0 i 4 H L i i 
300 400 500 600 700 800 900 
wavelength [nm] 
1000 
Fig. 9: Comparison of computed (9) and measured irradiance (solid line -)at 10:48 GMT with optical thickness 
t= 0.34 
The upwelling radiance L was computed for each spectral channel of SPOT-1 and of MOMS-2P for the time the 
satellite cameras recorded the test site (Table. 2): 
, Jb Rd 
jaa 
L4: spectral upwelling radiance 
R;: spectral sensitivity of the channel 
(4) 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part Bl. Amsterdam 2000. 285