Two versions of October 1994 IOP data have been prepared.  


  The first version (in V1.DIR) uses surface observations from the CSU SCM 
  homepage:
        Precipitation:     Average of 67 OK-Mesonet stations and 10 SMOS 
                           stations
        Surface Pressure:  Average of 5 SMOS stations  
        Sensible and 
        Latent Heat Flux:  Average of 10 EBBR stations


  The second version (V2.DIR) uses surface observations averaged from stations
  within the area surrounded by the sounding stations:
        Precipitation:     Average of 22 OK-Mesonet and 4 SMOS stations
        Surface Pressure:  Average of 4 SMOS stations  
        Sensible and 
        Latent Heat Flux:  Average of 4 EBBR stations
  Averaging area of surface data in this version is consistent with 
  averaging area of variables derived from the soundings.

  Each version contains two ascii data files: surface_9410.dat
                                              layer_9410.dat

  (1) Surface data are in surface_9410.dat.  It includes: precipitation, 
    latent heat flux, sensible heat flux, surface pressure, surface air
    temperature, soil temperature. 
 
  (2) Layered data are in layer_9410.dat It includes: state variables,
    vertical velocity, horizontal advective tendencies of temperature and 
    moisture.


  Two FORTRAN files in this directory explain everything you need:
                     read_surface.for
                     read_layer.for  

 
  Notes: 
         1. The product is derived using a constrained variational scheme. 
            The data conserve the column-integrated mass, moisture, static 
            energy and momentum for the  column encircled by the ARM sounding 
            array around the CART.  Detailed procedure has been described
            in a manuscript (Zhang and Lin, 1996, Submitted to JAS).

         2. The Julian  time in the data can be converted to "CSU
            time" for this IOP (day since 00 UTC 25 October) by subtracting
            298.00 from Julian day.

         3. The data has been processed with a vertical resolution 
            of 50mb.  Time resolution is 3 hours.  Masked data 
            (below ground) are represented by -9999. 

         4. The period is from October 25 to November 11.  The IOP
            actually ends in Nov. 14.  We do not have the soundings for
            the last three days and so the data is three days shorter 
            than that at CSU.
         

   Please direct comments to:  
         mzhang@atmsci.msrc.sunysb.edu
         jlin@gelua1.uars.sunysb.edu
   Your feedback will help to improve future versions of the product.    


                            Minghua Zhang  and Jialin Lin
                            Institute for Terrestrial and Planetary Atmos.
                            State Univ. of New York at Stony Brook 
                             8/15/1996