# Read me file for Beck et al., Estimation of sulfuric acid concentration using ambient ion composition and concentration data obtained by Atmospheric Pressure interface Time-of-Flight ion mass spectrometer

files: 
SA_neumayerIII.csv
SA_smearII.csv

Each file consists of 8 columns, the time is given in local time:
SMEAR II: UTC+2
Neumayer III: UTC

column 1	year
column 2	month
column 3	day
column 4	hour
column 5	minute
column 6 	second
column 7	measured H2SO4 (SA) concentration in molecules cm-3
column 8	estimated H2SO4 (SA) concentration in molecules cm-3