14 l.p.mm 
  
  
lata of the ma- 
>turer 
JL 
  
Notes to 1. 
Aerial Survey Camera 
United States of America 
li 
Ad 1.21 
Ad 1.22 
Ad 1.23 
The initial laboratory calibration certifica- 
te establishes the various characteristics of 
the camera. Prior to the use of a camera on a 
mapping project, a service test of the camera 
is performed to determine if any mechanical 
problems exist and to verify the static test 
data in a dynamic mode. Laboratory recalibra- 
tion is required whenever there is historical 
or technical evidence that the original geo- 
metry of the camera has been disturbed. 
The lens, focal plane and fiducial marks must 
be permanently fixed in rigid orientation with 
one another. The calibrated focal lenght, at 
which the values of radial distorsion are at 
a minimum, shall be 153,0 mm = 3 mm. The fidu- 
cial marks shall indicate the position of the 
principal point to within 0,05 mm. Lines con- 
necting opposing pairs of fiducials shall in- 
tersect at an angle of 9907 1s. 
Thé maximum radial distorsion at any point on 
the format shall not exceed = 0,01 mm when ca- 
librated to produce equal positive and negati- 
ve values within the O° to 42,5° half angle. 
The radial distorsion shall be determined at