In order to reduce the statistical uncertainty of the 
accuracy results, all simulations were performed several 
times. The number of required repetitions depends on 
the geometrical stability of the blocks. Blocks with all 
navigation data are more stable than without or with 
attitude data only. The obtained relative precision of 
the final values Br» By,» b, can be indicated as follows: 
- simulations with block size Bl (10 x 41 photographs) 
without navigation data: 7 - 10 % 
- simulations with block size Bl (10 x 41 photographs) 
with nativation data: 2 -.10 $ 
- simulations with block size B2 (5 x 21 photographs) 
without navigation data: 1 - 10 $ 
- simulations with block size B2 (5 x 21 photographs) 
with navigation data: L - 5 $. 
Remark: The photogrammetric measurements of the (X,Y, 2) 
control points are treated as error free, in order to 
separate the block accuracy from the effects of datum 
transfer. 
3 Results 
The results of the various simulations are summarized in 
tables.2-.4 and in figures 2 - 8... The. direct accuracy 
results are connected to relative terms (n, /]9,555 M, 7/9, , 
x 0 y. 0 
p, f 06 and à {9 where py, is the rms value of B. and y.) 
in order to make them transferable to other cases. The 
acutally chosen weight unit 0, * [d5.v um sis of: no 
particular meaning except for the weight ratios 
involved. 
The results will be compared and discussed with 
reference to several considerations. 
3.1 All exterior orentation elements, no ground control 
If all 6 camera orientation parameters are observed the 
blocks are determined and stable without any ground 
control (with regard to the navigation reference 
system). This Case (CO) shows the effects of auxiliary 
data and of their accuracy in its purest form. 
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