Frame camera 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Camera stations projected in the plane view 
DPS-camera 
  
  
  
] 
+ 
| 
! 
4 
+... [PER 
| | 
ee a ad em 4 ! 
le As | Bs | Cs | Update points P, projected in the plane view 
  
  
  
  
  
  
  
Figure 2. Overlapping image strips 
  
PITTTITT 
| 
| x ! 
o 
x 
  
  
  
  
  
Id 
  
Figure 3. Trace of an imaged terrain point Pi in the image plane of 
the three-line camera 
Remarkable for the DPS is the special arrangement of the linear CCD- 
sensors in the focal plane of the camera (Fig. 4). The outer sensor 
m lines A and C are not parallel to the central line B, they form an 
angle a with it or form an arrow (Fig. 4c). 
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