I 
20 
AF F(k + Ak) — F(k) 
5.5.7 
Ak Ak 
Here F(k) stands for the projective relations 5.1.1 and 5.1.2, and k stands for 
the unknown parameters in these relations. This technique has been used in an 
Algol-program for the computer CD3200, 
A very high degree of sophistication along these lines has been developed by 
D. Brown [4] in the analytical satellite photogrammetry, where parameters for 
symmetric radial distortion, tangential distortion and atmospheric refraction 
also are included in the adjustment. This calibration uses stars as a test field 
and the calibrations are made separately for every picture.