Erik de Min 
  
;tight profile "x PRIME D 
fa 7j 
strip 1 
A 1 ^ 1 
strip 2 
n» 
Figure 6: Pairs of tie points in overlap Figure 7: Residuals before and after strip adjustment (above) 
and empirical covariance function (below) 
¥ xu dtt i 
  
  
  
  
  
  
  
  
  
  
ses I] 
Figure 8: Histogram of residuals before (left, o — 7.1 cm) and after (right, 6 = 4.6 cm) strip adjustment 
The computed corrections tell someting about the errors in the strips before the adjustment. Figure 9a shows that most 
offsets are positive, which means that the computed heights from the laser measurement are in general higher than the 
groundtruth. Figure 9b does not show a normal distribution, however correction up to 4 cm/km occur frequently. For a 
striplength of 30 km this corresponds to 1 meter height difference between the two ends of the strip. Figure 9c shows the 
across-track tilts which are more or less randomly distributed, with a standard deviation of 33 cm/km. 
      
  
LA 
Itn tat 
AAI 
a a 
‘ou essences 
s. oe Somme come coussins ii où 
quete di AISLES 
Sexo Mcd 
Figure 9a: Offset-corrections Figure 9b: Along-track tilts Figure 9c: Across-track tilts 
o-1lcm o — 33 cm/km 
* 
  
234 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000.