X; . Ki = unknown parameters of image [y 
c a 
unknown parameters of 
A A “ orientation images I, and I 
X tl * Kk+1 i kei 
d; = read cycle number of image I; 
dy» di = read cycle numbers of orientation images I, and I +1 
The image coordinates are considered as observations of a least-squares 
adjustment and together with additional observations, e.g. control 
point coordinates the adjustment is made in the well-known manner of 
analytical photogrammetry. 
The unknowns of the adjustment are the 3n coordinates of the object 
points Pi (i=1...n) and the 6 1 parameters of the orientation images 
Ik (k=1...1). 
If information about the motion of the carrier between the orientation 
images is available, e.g. from an Inertial Navigation System (INS), it 
can be taker into consideration directly. The linear interpolation bet- 
ween the orientation images will then be replaced by interpolation based 
on the given data. Moreover the INS data can be used to derive obser- 
vations for the unknown parameters of the orientation images. 
In contrast to the classical photogrammetric bundle method the des- 
cribed mathematical model for three line imagery of an opto-electronic 
camera uses collinearity equations containing the unknown parameters of 
two orientation images. Therefore we may speak of generalized photo- 
grammetric point determination. The classical bundle method is then 
a special case with Ij = Ik. 
Furthermore, general control and object information can be used in the 
adjustment, as with the bundle method. The resulting procedure we call 
generalized combined point determination. 
3. SIMULATED EXAMPLES FOR THE USE OF.A THREE LINE CAMERA 
3.1 Free adjustment of a three line imagery strip 
For the absolute orientation (or datum determination) of a strip ge- 
nerated by a three line camera as for a photogrammetric strip, at least 
seven coordinates of well distributed control points or adequate infor- 
mation are necessary. The theoretical accuracy of the unknown object 
point coordinates, which we get from the least-squares adjustment, is 
then dependent on the datum determination. To obtain the so-called in- 
terior accuracy of a three line camera strip we have used the me thod 
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