File format - Atmospheric data

• ASCII, 1 file per station/record, 1 line for each observed time instant.
• Columns:

  1	Time [fractional year]
  2	Year
  3	Month
  4	Day
  5	Hour
  6	Minute
  7	Second
  8	Latitude
  9	Longitude
  10	Height/altitude
  11	Observed mixing ratio
  (12)	(Sigma)
  (13)	(Modelled mixing ratio)

• Lines starting with "#" or "!", or empty lines, are ignored as comments.
• Columns given in the table in parantheses are only used where relevant.
• Column 1 is only meant for plotting purposes, while the actual calculation always reads time from columns 2-7.
• Column 10 is interpreted as
  - Height [m.a.s.l] if positive;
  - Minus altitude [m.a.ground] if negative.
• If there are two species, columns 11, 12, and 13 are duplicated as

  11-12	Observed mixing ratios
  (13-14)	(Sigmas)
  (15-16)	(Modelled mixing ratios)

  Analoguously for three and more species.
• File names for atmospheric data are
    "code.spec.ts"
  See Misc. > Station/record codes for code, and Misc. > Species for spec.
• For total-column observations (GOSAT, TCCON, etc.), an extended file format applies.