National Oceanic and Atmospheric Administration, United States Department of Commerce

  • Attention GOES Users! (1/4/2023):
    GOES-18 has been declared as the Operational GOES-West satellite since 1800 UTC, January 4, 2023. In the meantime, GOES-17 will continue to operate and send data to its users and to CLASS to be archived until January 10, 2023, after which preparations for drift to final storage position will begin.

  • Attention JPSS Users. Start dates of NOAA-21 products now available to the public. (12/20/2022):

    For easy access to the most recent JPSS global daily tar files please go to or

  • Attention CLASS Users! (12/14/2022):

    CLASS has implemented HTTPS for CLASS JPSS and Directory Dissemination Tree (DDT) cached data as a mechanism to download data for JPSS cache and DDT cache.

    For the JPSS cache,

    For the DDT cache,

    Please contact the CLASS Help Desk if you have any questions.

  • Attention GOES Users! (11/23/2022):
    In addition to GOES-18 L1b Radiance and Cloud and Moisture Imagery products, a majority of the Level 2 products are now available from GOES-18. For details on data maturity, data quality, and public start dates please go to and click on the Product Details tab. Please contact the CLASS Help Desk if you have any questions.

  • Attention JPSS Data Users! (updated on 3/16/2022):
    CLASS is now receiving reprocessed Sensor Data Records (SDR) for all instruments flown on S-NPP and reprocessed Temperature Data Records (TDR) for the ATMS instrument flown on S-NPP. The date range which covers the reprocessing period for each instrument is:
    • *ATMS SDR/TDR (2011-11-08 - 2019-10-15) - The complete record is now available under RPATMSSDR and RPATMSTDR (01/31/2022)
    • *CrIS SDR (2012-02-20 - 2020-01-29) - The complete record is now available under RPCRISSDR (03/11/2022)
    • *OMPS SDR (2012-01-30 - 2020-05-30) - The complete record is now available under RPOMPSSDR (03/16/2022)
    • *VIIRS SDR (2012-01-02 - 2020-04-30)

    At an ingest rate of 3TB per/day the completion date is estimated for June 2023. The VIIRS data is the largest volume by far and will be the last to ingest. Users can download the global data files from the ftp server at under the STAR subfolder. The data will remain on the server for about 85 days. Searches for regional data on the individual search pages will remain disabled until the data are 100% available. Please contact the CLASS Helpdesk for details.

  • Attention New CLASS Users! See tutorial on accessing data from CLASS (4/12/2018):

    Please click on the following link to get step by step instructions on how to use CLASS to search and order data:

    If you have any questions or need assistance please submit an email to CLASS Help Desk.