MAO/SMPS/S1 - clogged impactor at the SMPS aerosol sample inlet

The clogging of the impactor leads to a decrease in the aerosol sample flow rate of the 
SMPS, which is nominally 1 lpm.  This decrease in the SMPS sample flow rate results in an 
underestimation of the ambient size distribution and integrated number concentration.

To get a rough estimate of the actual SMPS aerosol flow rate, one can compare the 

integrated SMPS number concentration with the number concentration reported by the TSI 3772 
CPCF.  This corrected flow rate can then be used to invert the raw SMPS data to obtain 
improved size distribution values.

• total_concentration
• CPC_inlet_flow
• number_size_distribution
• CPC_sample_flow
• aerosol_flow