Dhoto- 
a Way 
point 
 nadir 
(Pu. 
10d of 
iduals 
  
If systematic error, for instance radial distortion, is present, the measure- 
S > 
ents bi to be corrected before using the formulae. 
m 
Also the influence of the distortion upon the y-parallaxes can be PS 
nt is performed from observations at only six points. 
dan RR wo the y-parallaxes at all other points are computed from the 
or e the elements of the relative orientation, the residual parallaxes 
pate fe rie e if distortion is present or not. The residual parallaxes 
enm mem are symmetrical around x = b/2 and y = 0 give this information. 
à 
The manner of determining standard observational errors as exerted 
S | i ith the instrument. 
tions as in the work wit 
s the same functional connec 
Di ERES OE DE can be compared and also different operators and mat 
n pie observational error can be used as a criterion of the working 
e 
of the instrument.