For running the examples in the OpenGrADS Cookbooks you need one or more of the following datasets. If all you want to do is to try a few things out, the classic model dataset can be firectly accesed by gradsdods/gradsdap via OPeNDAP:

ga-> sdfopen http://monsoondata.org:9090/dods/model

Othwerwise, you will need to download one or more of the following files to your local disk.

• GRIB-1 files: download all three files:
  • http://opengrads.org/test_data/model.ctl
  • http://opengrads.org/test_data/model.idx
  • http://opengrads.org/test_data/model.grb

  This is the classic model dataset used in the GrADS Tutorial and many other examples.

• GRIB-2 files: depends on the GrADS version you are using
  • For testing GrADS 2.0 you must download all three files:
    • http://opengrads.org/test_data/model_25.ctl
    • http://opengrads.org/test_data/model_25.idx
    • http://opengrads.org/test_data/model_25.grb2
  • For testing the GRIB-2 extension in GrADS 1.9 download these three files instead:
    • http://opengrads.org/test_data/model_25.gdf
    • http://opengrads.org/test_data/model_25.inv
    • http://opengrads.org/test_data/model_25.grb2

  The model_25 dataset is not the same as the classic model dataset and was produced by interpolating GFS output to lower resolution.

• NetCDF/HDF-4: download one of more of the following:
  • http://opengrads.org/test_data/model.nc
  • http://opengrads.org/test_data/model.hdf
  • http://opengrads.org/test_data/aero.nc
  • http://opengrads.org/test_data/slp_djf.nc

  The first 2 files contain the classic model dataset in NetCDF/HDF format. The aero.nc dataset contains aeorosol extinction optical depth (derived from GEOS-5) and is useful to test PyGrADS graphical capabilities. The slp_djf has a time series of sea level pressure depicting the North Atlantic oscillation.

• GrADS Binary: download these two files
  • http://opengrads.org/test_data/pdef.ctl
  • http://opengrads.org/test_data/pdef.dat

  This dataset contains data in a particular map projection and is useful to test the PDEF feature in GrADS.

• Satellite Images: the following images are needed for testing PyGrADS:
  • http://opengrads.org/test_data/goes_conus.jpg
  • http://opengrads.org/test_data/goes_fulldisk.jpg