Source:  ECMWF
Creation date:  1997
Model output:  Spectral, model level.
               Conversion to grid point, pressure level
Range of data:  Feb 5, 1993 00Z to Mar 7, 1993 00Z
Data Format:  Goddard Phoenix from GRIB
First point on grid:  Dateline (stored west to east) and South Pole
Size of dataset:  27GB
Resolution:  640 longitude points (.5625 deg)
             321 latitude points  (.5625 deg)
             31 pressure levels
             6 hour interval
Levels:
 1000.00  996.00  988.00  979.00  969.00  958.00  947.00
  935.00  922.00  894.00  850.00  830.00  800.00  750.00
  700.00  650.00  600.00  550.00  500.00  450.00  400.00
  350.00  300.00  250.00  200.00  150.00  100.00   70.00
   50.00   30.00   10.00

Quantities:
  Surface
    Surface temperature (K)
    Snow depth (m)
    Mean sea level pressure (mb)
    Total cloud fraction (0-1)
    10m U Wind (m/s)
    10m V Wind (m/s)
    2m Temperature (K)
    2m Dew point temperature (K)
    Surface roughness (m)
    Albedo
    Surface solar radiation (W/m**2 s)
    Surface thermal radiation (W/m**2 s)
    Top solar radiation (W/m**2 s)
    Top thermal radiation (W/m**2 s)
    East/west surface stress (N/m**2 s)
    North/south surface stress (N/m**2 s)
    Low cloud fraction (0-1)
    Medium cloud fraction (0-1)
    High cloud fraction (0-1)
    Skin temperature (K)
    Surface pressure (mb)
    Surface geopotential height (m)
  Upper Air
    Temperature (K)
    U Wind (m/s)
    V Wind (m/s)
    Specific humidity (kg/kg)
    Vertical velocity (PA/s)
    Cloud liquid water content (kg/kg)
    Cloud fraction (0-1)
    Geopotential height (m)

Comments:
  This nature was used primarily for the NPOESS OSSE effort in collaboration
  with NCEP/EMC, NOAA/NESDIS, Simpson Weather Associates, and ECMWF.

  The Phoenix-formatted data were created on a Cray mainframe
  and may be difficult to read due the Cray blocking.  The data
  are also archived in various forms at NCEP and Simpson 
  Weather Associates.

  The conventional observations generated from this nature run 
  are available in NCEP BUFR format with and without random noise.