The retention times are calculated from the moment the sample is injected
in the chromatographic column (IT FLASH or GC INJECTION). In the chromatogram, this
corresponds to the first peak observed in time, which is generated by the
flash heating of the injection trap of SAM-GC. This time is 
635631766.88 s (sclk) for GC 1 chromatogram and 
635636082.50 s (sclk) for GC 4 chromatogram . The retention times are 
calculated by subtracting this time, to the times of the peaks maxima.
The original TCD chromatograms are available in the file noise.csv.

GC column 1 run

peak 0 ;  GC1 INJECTION ; 0
peak 1 ;   ; 527
peak 2 ;   ; 738
peak 3 ;   ; 792
peak 4 ;   ; 941
peak 5 ;   ; 1096


GC column 4 run

peak 6 ; GC 4 IT FLASH 1  ; 0
peak 7 ;   ; 194
peak 8 ;   ; 308
peak 9 ;   ; 692
peak 10 ;   ; 713
peak 11 ;   ; 906
peak 12 ;   ; 1190
peak 13 ;   ; 1390
peak 14 ;   ; 1521
peak 15 ; GC4 IT FLASH 2  ; 0
peak 16 ;   ; 231

The abundance given in the table (species.csv) corresponds to the max intensity of the 
most abundant mass peak which are measurable for each peak. The unit is 
counts/sec. There is no baseline correction for this fit.