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User's manual – Ver. 1.53 July 2015 15/75
1.3 Basic calculations
Determination of black carbon concentration is based on measurement of light absorption on
filter loaded with aerosols:
Optical attenuation:
I
0
=reference signal;
I=spot signal
Flow:
=measured flow
=leakage factor
Attenuation coefficient:
S=spot size; t=time
Absorption coefficient:
C=multiple scattering parameter
(Weingartner et al. 2003)
Black carbon concentration:
=mass absorption crossection
Loading effect compensation:
k=compensation parameter
Final equation:
0
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