National Oceanic and Atmospheric Administration, United States Department of Commerce


  • Attention CLASS USERS:
    Please note: Processing and dissemination of S-NPP data from ad hoc orders will be paused due to planned maintenance on Thursday, April 24, 2014, from 1000 to 1700 UTC. There will be no access to ftp://ftp.class.ncdc.noaa.gov/ during this time.

  • Attention Suomi NPP Users:
    The most recent global NPP operational products are now available in daily tar files for quick and easy downloads at: ftp://ftp-npp.class.ngdc.noaa.gov/. Please see the NPP help page for instructions. Up to the most recent 85 days of data will be available for direct online access.

  • Attention CORS users (07/2013):
    The National Geodetic Survey's CORS data archived at the National Geophysical Data Center has been transitioned into CLASS. The data collections include RINEX since 1994 and raw GPS from selected CORS sites since 2004. The original at-sampling rate was retained except where there was only the 30-second decimated rate data. For more info see the CORS CLASS search page.

  • Suomi NPP data access status (12/16/13):
    Below is a list of S-NPP products released to the public and now available through CLASS. The complete list of products along with the begin dates of product availability are located on the Suomi NPP FAQ page. The remaining NPP products will be released to the user community over a time frame of several months. Please note that all newly released products are at 'Beta' maturity level as defined in the Product Maturity Level page. Details of high priority issues related to the data quality are contained in the Readme files provided by the NPP Project Scientist. Please read these before ordering and using the data!

  •   ATMS:

        Readme for released S-NPP ATMS SDR data (New Readme posted 12/2/13)

  •   CrIS:

        Readme for released S-NPP CrIS SDR data (New Readme posted 12/16/13)

  •   CrIMSS:

        Readme for released S-NPP CrIMSS EDR data (New Readme posted 02/13/14)

  •   OMPS:

        Readme for released S-NPP OMPS Nadir Ozone Profile data (New Readme posted 02/13/14)
        Readme for released S-NPP OMPS Ozone Total Column EDR and OMPS Nadir Total Column Ozone First Guess (New Readme posted 02/13/14)
        Readme for released S-NPP OMPS SDR data (New Readme posted 12/16/13)

  •   VIIRS:

        Readme for released S-NPP VIIRS Active Fires ARP data (New Readme posted 02/13/14)
        Readme for released S-NPP VIIRS Aerosol Optical Thickness (AOT) EDR data
        Readme for released S-NPP VIIRS Cloud Mask IP data (New Readme posted 12/16/13)
        Readme for released S-NPP VIIRS Cloud Products Status Report
        Readme for released S-NPP VIIRS Ice Concentration IP
        Readme for released S-NPP VIIRS Ice Surface Temperature EDR (New Readme posted 02/13/14)
        Readme for released S-NPP VIIRS Land Surface Temperature EDR
        Readme for released S-NPP VIIRS Near Constant Contrast (NCC) EDR Ground Track Mercator (GTM) Geolocation and VIIRS Near Constant Contrast Imagery EDR (New Readme posted 12/16/13)
        Readme for released S-NPP VIIRS Non-NCC Imagery EDR data (New Readme posted 12/16/13)
        Readme for released S-NPP VIIRS Ocean Color/Chlorophyll EDR
        Readme for released S-NPP VIIRS SDR data (New Readme posted 12/2/13)
        Readme for released S-NPP VIIRS Sea Ice Characterization EDR (New Readme posted 02/13/14)
        Readmefor released S-NPP VIIRS Sea Surface Temperature EDR
        Readme for released S-NPP VIIRS Snow Cover EDR Products (New Readme posted 02/13/14)
        Readme for released S-NPP VIIRS Surface Reflectance
        Readme for released S-NPP VIIRS Surface Type EDR
        Readme for released S-NPP VIIRS Suspended Matter EDR
        Readme for released

  •   Reminder:
        The most recent global NPP operational products are now available in daily tar files for quick and easy downloads at: ftp://ftp-npp.class.ngdc.noaa.gov/.

  • Tutorial for ordering Suomi NPP data in CLASS:
    A tutorial for ordering data through CLASS can be found at Data Access. The tutorial references Suomi NPP data but is applicable to all data types. If you have any questions please email CLASS Help Desk.