README — Description of the data files Latitude:XX.XX_Longitude:YY.YY.txt
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Each file contains a table with 13 columns and no header. Each row corresponds
to a specific local solar time, sorted in ascending order.

Only points between latitudes -60° and +60° are included.

File naming convention:
    Latitude:<latitude>_Longitude:<longitude>.txt

Columns:

 1. Local true solar time                            [sol]
 2. Solar longitude                                  [°]
 3. Latitude of the point                            [°N]
 4. Longitude of the point                           [°E]
 5. Surface temperature                              [K]
 6. Subsurface ice temperature                       [K]
 7. Surface pressure                                 [Pa]
 8. Partial vapor pressure of atmospheric H2O        [Pa]
 9. Saturation vapor pressure over liquid water at surface temperature             [Pa]
10. Saturation vapor pressure over ice at surface temperature                      [Pa or -1]
11. Frost thickness                                                                [µm]
12. Saturation vapor pressure over liquid water at subsurface ice temperature      [Pa or -1]
13. Saturation vapor pressure over ice at subsurface ice temperature               [Pa or -1]

Notes:

- Frost thickness (column 11) is computed from the mass of frost per unit area 
  divided by the density of ice (920 kg/m³), and converted to micrometers (µm). 
- Saturation vapor pressure over liquid water at the surface (column 9) is computed 
   using Eq. 10 of Murphy and Koop (2005)
- The same equation is used for the saturation vapor pressure over liquid water at 
  subsurface ice temperature (column 12). If subsurface ice is not predicted to be 
  stable by the PCM, the a value of -1 is assigned to this quantity.
- Saturation vapor pressure over ice  at the surface (column 9) is computed 
  using Eq. 7 of Murphy and Koop (2005). If there is less than 1 µm at this 
  location, then this value is set to -1.
- The same equation is used for the saturation vapor pressure over ice at 
  subsurface ice temperature (column 13). If subsurface ice is not predicted to be 
  stable by the PCM, the a value of -1 is assigned to this quantity.