DEM. 
054 
jixel 
hannel 
el can 
gation, 
ut the 
gation 
erived 
(rad) 
  
0.00015 T 
0.00010 
0.00005 
ATTITUDE 0 
-0.00005 
-0.00010 
  
    
GIVEN ATTITUDE 
  
  
-0.00015 ^ 7 
EXTRACTED ATTITUDE — P ^, , 
-0.00020 ‘ ‘ ; ; ; ‘ : + 
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 
TIME 
(a) Time delay equivalent to 160 pixels along track. 
(rad) 
0.00015 
  
    
0.00010 
0.00005 
ATTITUDE 0 
-0.00005 [ 
-0.00010 | 
  
GIVEN ATTITUDE 
  
  
-0.00015 | ns 7 
; : : EXTRACTED ATTITUDE—® ^.» 
-0.00020 y 1000 . 2000 3000 400 5000 6000 7000 8000 9000 
TIME 
(b) Time delay equivalent to 320 pixels along track. 
(rad) 
0.00015 ; ; + T 
  
0.00010 
0.00005 
ATTITUDE 0 
-0.00005 
-0.00010 [ 
-0.00015 [ 
  
    
Le 
GIVEN ATTITUDE 
A 
agi n ree 
  
  
-0.00020 1000 — 2000 3000 
4000 5000 6000 7000 8000 9000 
TIME 
(c) Time delay equivalent to 640 pixels along track. 
Figure 4 Simulated result of attitude estimation. 
from the simulation image using the image-matching method. In 
order to simplify the calculation, we used the image correlation 
method as the image-matching method. In image-matching, 
matching points with a correlation coefficient of less than 0.99 
are neglected, and the matching accuracy is 1 pixel. The matching 
191 
window size is 3 lines x 41 pixels. Fitting points with a correlation 
coefficient of less 0.99 are calculated using interpolation from 
effective fitting points based on the assumption that the attitude 
change of satellite is very small compared to the satellite 
movement. The result is shown in Fig. 7. The solid line shows the 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996