171 
e =^(f) Z ET%,C(z + z f + vO ( 2 ) 
H 
and expression establishing between the luminance affecting 
the photo film during the surveying (0 ) and during exposure 
of the sensitogram (0 C ) 
t 
e = 
e/f 
t 
- A t A A 
(3) 
e ff 
where: d and f - the diameter of the aperture and focal 
distance of the objective; 
the transmission coefficient of the 
atmosphere ; 
the transmission coefficient of the 
optical system (illuminator + light 
filter + objective) 
coefficient of fall of the image 
luminance over frame field; 
dissipation in radiation chamber related 
to the surface of the Earth; 
coefficient of zonal brightness of the 
object ; 
coefficient of zonal brightness of terrain 
mean-weighted over area within the field 
of view of the optical system; 
coefficients of haziness and light 
dissipation in the given zone; 
effective exposures during surveying and 
exposure of sensitograms; 
corrections for deviation from the recipro 
city law and for difference in the spectral 
composition of the measurements effective 
during surveying and during exposure of the 
sensitograms (at = ieff A± = 1 ; 
at exposure of sensitogram behind the 
surveying light filter A, ^ 1). 
the 
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