This directory (ftp://nssdcftp.gsfc.nasa.gov/staging/review_08/all_catalogs)
contains digitized Data Set Catalogs (DSCs) corresponding to NSSDC data
collections.  The DSCs contain ancillary information on the data which may
include formatting information, data headers, sample data dumps, articles
related to the data or instrument, and/or notes from the instrument P.I. or
team.  Most of the DSCs are in the form of single PDF files (dsc_nnnn.pdf),
some are directories containing TIFF images (dsc_nnnn_tif or dsc_nnnn_tiff).
In some cases there were two DSC's for a given data collection, these have
both been scanned and made available, with an "A" and "B" appended to the
name.

Not every DSC has been digitized so a few are missing from this directory. A
cross reference between the DSC number (DSC_nnnn) and the NSSDC ID is given
in spreadsheet_dsc.xls in the directory above this
(ftp://nssdcftp.gsfc.nasa.gov/staging/review_08/)