NARR CFSRR

    What are NARR and CFSRR?

    What are they not?

    Others reanalyses, analyses

    Is real data better?
	example from an ensemble of analyses


Grib-1, Grib-2, Netcdf, HDF

    NARR: grib
    CFSRR: grib2, internal=grib1
    ECMWF: grib
    JRA-25: grib
    MERRA: HDF

    Grib-1: (old) WMO standard, 1/3 - 1/2 size of IEEE file
            many tools, scaled packed integers
    Grib-2: new WMO standard, 1/5 - 1/2 size of Grib-1 files
	    compressed files
    Netcdf-3: common in university environment,
            IEEE or scaled packed integers
    Netcdf-4: uses HDF-5, compressed files

    Web/Transmission:  

     Grib: individual records can be download very efficiently
           "cat" records to combine records
     Netcdf: database .. whole file or hook a database to web server

     Both: Various programs on web to plot, extract data, etc
	   OpenDAP

     Metadata:  often lost when converting to new formats
	
   Tools:
     grib: many, degrib, wgrib, GrADS, GDAL, copygb, lcgrib, ggrib, cnvgrib
     grib2: degrib, pygrib, wgrib2, GrADS, GDAL, copygb2, cnvgrib,
  Conversion: grib -> ?
     netcdf: NCL, grib2nc (unidata), degrib, wgrib2, GrADS (lats), GDAL
     GIS: GDAS, GrADS, degrib

Nomads:

   partial http:
     NARR: example
     cfsrr: example
     gfs: example

   grib filter:
     cfsrr
     gfs:

GrADS:

   NARR example
   cfsrr example
   DODS example