Panchro Infra-red Colour 
microns microns microns 
9,0 
4,9 TC 8.7 
5,9 8.7 1.7 
These figures show that the adjustment of the images 
in the instrument can be made with a very good accuracy. 
A significant difference between the accuracy of the mea- 
surements in the three different cases can hardly be said | 
to exist. the r« 
: The y-parallaxes were then measured in a number of r 
points on the fundanental circles. All y-parallax measure- residi 
ments were made stereoscopically. In all tne cases the radii 
of the circles were chosen the same as the base. To facili- 
tete the computation of the radial distortion, such points 
were chosen on the circles, as to make the length of the 
  
  
arc between two points correspond to a centre angle of 10% : 
This makes it possible to determine the distortion curve in ine di 
9 regularly distributed points. 
With the aid of the measured y-parallaxes in the usual 
six orientation points, 1 - 6, it is possible to compute the 
numerical residual parallaxes in the points in question, 1 
after the adjustment of the relative orientation. As we only oF the 
needed to determine the residual parallaxes in the points radius 
on the fundamental circles, the formula (9) given in [1] four à 
may be written: rison 
Wild C 
Py = k, + K,cosa + k,sina cosu + k,sina + ksin 0 - (1a) | eee 
E : : : 232 the av 
Py = ky + k,(1-cosc) + kSino(1-cosa) + k,Sina 4 k,sin G = Dy be cau 
3 (1b) and by 
b: Equation (la) refers to points on the circle with its centre F 
in point 1 and equation (Ib) to those on the circle with its nation 
centre in point 2.