This area is NSSDC's primary ftp pathway to data and services.
This "nssdcftp" directory structure is currently shared by NSSDC and the
SPDF (Space Physics Data Facility), which until recently were part of the
same organization, but are now separate entities, under different 
organizations.  Their homepages are at http://nssdc.gsfc.nasa.gov and 
http://spdf.gsfc.nasa.gov, respectively.

As of February, 2006, there were seven customer-relevant directories and six customer-irrelevant unix system directories.  The only other significant area
of ftp-accessible data is ftp://cdaweb.gsfc.nasa.gov/, which has the 
CDF-formatted data underlying SPDF's CDAWeb.  Each customer-relevant directory 
herein has its own readme file, where appropriate.
These directories are -

Directory         Description

miscellaneous     (Select the directory of interest, then see the 
                   readme file in that directory.)

models            NSSDC's holding of solar-terrestrial models
                   available for distribution and staging

photo_gallery     NSSDC's Photo Gallery of images with captions
                   for users seeking alternatives to web-browser both
                   downloading of low and hi-resolution images.

selected_software Special-purpose software tools (CDF, IDL, PDS, etc.)

spacecraft_data   NSSDC's primary holding area for spacecraft data,
                   organized primarily by spacecraft series,
                   spacecraft, experiment, data set, time span.

staging           Data staging area for web-based NSSDC services
                   including ATMOWEB, COHOWeb, FTPBrowser, MODELWeb, 
                   and OMNIWeb.

standards         Repository for files related to software standards
                   such as CDF, FITS, NOST and SFDU


April 2006, NSSDC Management.