Reading HIRDLS Level 2 Data HIRDLS Level 2 data is stored in the HDF-EOS5 format in the HDF-EOS Aura File Format Guidelines document 1. These data files can be read via C/C++ or Fortran using either the HDF-EOS5 or HDF5 library. A HIRDLS developed IDL routine "get_aura" is also available upon request for those users which wish to use IDL to access the HIRDLS data. Users should obtain the pre-compiled HDF5 library for their operating system, if possible. Otherwise, source code is also available (see http://hdf.ncsa.uiuc.edu). These are prerequisite in order to compile the HDF-EOS5 library (see http://www.hdfeos.org/). Both libraries are needed to fully access the Aura HIRDLS data files. For additional help contact the GES DISC at help-disc@listserv.gsfc.nasa.gov or telephone 301-614-5224.