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4.3 - COMPUTATION PROGRAM. 
To compute the relative orientation of tw 
grams in Fortran language have been drawn ups 
1) The first program uses the p | 
are the following: | 
- the orientation parameters of the first photogram, 
- the coordinates on the two photograms of the ima 
- the height of at least ¢ne ground point, 
- the appro imet values of the coordinates of the perspective centres 
X Ss Y 5, 22) and of the parameters S : e 
By meàns of these data the program computes soe ten parameters of exter 
nal orientation of the second photograms x(P ; Tm à 2 ; Sk (2)' 9 0! 
q (2)! 9 (2) boy? Bey) (2) and the coordinates'of thé ground point in 
the same reference system in which the external orientation parameters of 
the first plate are given. 
The parameters S 
ters wand d of 
we said. 
2) The second computation program is based on the formulas 4) and 
uses as input data the results given by the first program; therefore, this 
second program is to be considered adjustment program rather than a compu 
tation program. : 
The input data are therefore: 
- the known orientation parameters of the first photogram and those of the 
second photogram obtained by means of the first program, 
- the plate coordinates of the images of the ground point, 
- the coordinates of the ground point obtained by means of the first pro 
gram. 
Through these data the program computes the variations to bring to the o 
rientation parameters of the second photogram and to the coordinates of 
the ground points. 
These two programs have also been used to compute the data concerning 
the fictitious model. The results of the computation have been satisfactory. 
The oomputation have pointed out that the problem of relative orientation can 
be solved by means of the parallax and scaling equations only. However, the 
second computation program may be more useful when it is possible to know the 
right coordinates of some ground points in the same reference system in which 
the orientation parameters of the first photogram are given. Moreover, it is 
possible that in peculiar taking conditions, the equations 4) are more suita 
ble than the equations for a right model formation. 
The further studies concerning the problem of a strip of panoramic pho 
tograms will bring other explanations about this subject. 
o panoramic photograms, two pro 
arallax and scaling equation; the input data 
ges of the ground pants, 
(2)' 3T 2)’ that are the corresponding of the parame 
5" Space (2 ection are not determined, according to what