The files psef_calib_params.txt and psif_calib_params.txt in this
directory contain parameters used in the calibration of THEMIS SST
Level 1 data, for electrons and ions, respectievly. In each file, each
row has a time followed bythe columns are defined as follows:
Year-Month-Date/Hour:Minute:Second EnScaleS1 EnScaleS2 EnScaleS3
EnScaleS4 EnOffsetS1 EnOffsetS2 EnOffsetS3 EnOffsetS4 DeadTime
GFNominal GFCorrectionS1 GFCorrectionS2 GFCorrectionS3 GFCorrectionS4
AttenuatorS1 AttenuatorS2 AttenuatorS3 AttenuatorS4 EffS1E1 EffS1E2
EffS1E3 EffS1E4 EffS1E5 EffS1E6 EffS1E7 EffS1E8 EffS1E9 EffS1E10
EffS1E11 EffS1E12 EffS1E13 EffS1E14 EffS1E15 EffS1E16 EffS2E1 EffS2E2
EffS2E3 EffS2E4 EffS2E5 EffS2E6 EffS2E7 EffS2E8 EffS2E9 EffS2E10
EffS2E11 EffS2E12 EffS2E13 EffS2E14 EffS2E15 EffS2E16 EffS3E1 EffS3E2
EffS3E3 EffS3E4 EffS3E5 EffS3E6 EffS3E7 EffS3E8 EffS3E9 EffS3E10
EffS3E11 EffS3E12 EffS3E13 EffS3E14 EffS3E15 EffS3E16 EffS4E1 EffS4E2
EffS4E3 EffS4E4 EffS4E5 EffS4E6 EffS4E7 EffS4E8 EffS4E9 EffS4E10
EffS4E11 EffS4E12 EffS4E13 EffS4E14 EffS4E15 EffS4E16,

where EffSNEM refers to the efficiency of energy measurement. A
different correction is applied for each combination of sensor head
and energy bin. Details regarding SST calibration can be found in the
document:
ftp://apollo.ssl.berkeley.edu/pub/THEMIS/3%20Ground%20Systems/3.2%20Science%20Operations/Science%20Operations%20Documents/thm_sst_davin_larson_June2009.pdf