This contains information describing the columns of data found in the .HDR files.
Column#1: Profile #
Column#2: Year
Column#3: Month
Column#4: Day
Column#5: Hour
Column#6: Minute
Column#7: Second
Column#8: Number of samples averaged for this profile
Column#9: Sound speed used to calulate velocity (m/s)
Column#10:Mean heading 
Column#11:Mean pitch (rotation around the Y axis)
Column#12:Mean roll (Rotation around the X axis)
Column#13:Mean temp. (C)
Column#14:Mean pressure (dBar)
Column#15:std. dev. of heading
Column#16:std. dev. of pitch
Column#17:std. dev. of roll
Column#18:Std. dev. temp.
Column#19:.std. dev. press
Column#20:Instrument power supply voltage level
Only the old files from 2000 and 2001 have the following columns:
Column#21: OBS #1
Column#22: OBS #2