National Oceanic and Atmospheric Administration, United States Department of Commerce


  • Important Changes to CLASS Dissemination URLs (update 02/07/2024):

    New dissemination URLS (ftp and https) shown below have been activated and are now available to users. The legacy dissemination URLs will be discontinued on March 27, 2024, after which date only the new URLs will work. Subscribers should have received an email to make the appropriate changes to their scripts as soon as possible. Users who are retrieving the daily JPSS tar files from ftp-jpss must act quickly to continue receiving the data on the new URL. The website address will stay the same. One other note, the new ftp login user id will change from "anonymous" to "ftp" followed by any set of password characters defined by the user in accordance with the transfer rules established within the AWS Transfer Family.

    Current ftp links New ftp links
    ftp://ftp-jpss.avl.class.noaa.gov/ ftp://ftp-data.class.noaa.gov/JPSS/ (JPSS TAR files) (Case sensitive)
    ftp://ftp.avl.class.noaa.gov ftp://ftp-order.class.noaa.gov/ (ad hoc orders)
    ftp://ftp.avl.class.noaa.gov/sub ftp://ftp-order.class.noaa.gov/sub/ (subscriptions)
    Current https links New https links
    https://download.avl.class.noaa.gov/download/jpss/ https://data.class.noaa.gov/JPSS/ (JPSS TAR files) (Case sensitive)
    https://download.avl.class.noaa.gov/download/ https://order.class.noaa.gov/public/ (ad hoc orders)
    https://download.avl.class.noaa.gov/download/sub https://order.class.noaa.gov/public/sub/ (subscriptions)

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

  • Attention JPSS Users! (01/24/2024):
    • Starting in July 2024, for all JPSS satellites (S-NPP, NOAA-20, and NOAA-21), the VIIRS SDR data will be associated with and delivered with the VIIRS Terrain-Corrected Geolocation instead of the VIIRS Ellipsoid Geolocation.
    • Historical VIIRS SDRs will continue to be associated with and delivered with the Ellipsoid Geolocation.
    • However, only for S-NPP, the VIIRS Ellipsoid Geolocation (GMODO) will remain orderable separately, just not associated with and delivered with theS-NPP VIIRS SDR data. GMODO will not be available from NOAA-20 or NOAA-21.
    • The VIIRS Day-Night Band SDR will continue to be associated with and delivered with the VIIRS Day-Night Band Geolocation.
    • VIIRS IPs and EDRs will not be affected by the VIIRS SDR geolocation change.

  • Attention JPSS Data Users! (updated on 10/19/2023):

    Now available! The 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 is now accessible via the CLASS web ordering system. The reprocessed data is located under their own data families listed on the drop down product menu. 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 available under RPATMSSDR and RPATMSTDR
    • CrIS SDR (2012-02-20 - 2020-01-29) - The complete record is available under RPCRISSDR
    • OMPS SDR (2012-01-30 - 2020-05-30) - The complete record is available under RPOMPSSDR
    • VIIRS SDR (2012-01-02 - 2020-04-30) - The complete record is available under RPVIIRSSDR

    The operational data received after the reprocessed date ranges uses the latest version of the reprocessing algorithm.

  • Attention JPSS Users! (Updated 10/10/2023):

    Please note that data products from the NOAA-20 satellite should not be considered of operational maturity due to an anomaly over the weekend. The specific time periods that the data should not be considered operational is detailed below:

    • CERES: 09/29/2023 19:00 UTC to 10/02/2023 17:00 UTC
    • CrIS: 09/29/2023 19:00 UTC to 10/04/2023 00:00 UTC
    • OMPS: 09/29/2023 19:00 UTC to 10/06/2023 19:00 UTC
    • ATMS: 09/29/2023 19:00 UTC to 10/01/2023 20:45 UTC
    • VIIRS: 09/29/2023 19:00 UTC to 10/01/2023 20:45 UTC

  • Attention JPSS Users! (6/30/2023):
    JPSS data was delayed due to a hardware issue. The delay was from 6/28/23 1445Z (10:45 AM) ET to 6/29/23 2000Z (4:00 PM ET). The data backlog is processing and should complete sometime 6/30/23.

  • Attention GOES Users! (4/20/2023):
    GOES-18 has been declared as the Operational GOES-West satellite since 1800 UTC, January 4, 2023 replacing GOES-17. See data and products under the GOES-R Series Families on the drop down list.

  • Attention JPSS Users. Start dates and times of NOAA-21 products now available to the public. (4/20/2023):
    • ATMS Sensor Data Record: Dec 3, 2022 @23:49:55 UTC
    • ATMS Temperature Data Record: Dec 3, 2022 @23:49:55 UTC
    • CrIS Sensor Data Record Mar 23, 2023 @19:09:30 UTC
    • VIIRS Sensor Data Record Mar 30, 2023 @00:10 UTC
    • VIIRS Imagery Environmental Data Record: Mar 30, 2023 @00:10 UTC

    For easy access to the most recent JPSS global daily tar files please go to ftp://ftp-jpss.avl.class.noaa.gov/ or https://download.avl.class.noaa.gov/download/jpss.

    Also, be sure to review the maturity Readmes for any data issues and caveats on the STAR JPSS Algorithm Maturity Matrix website at https://www.star.nesdis.noaa.gov/jpss/AlgorithmMaturity.php.

  • 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: https://www.avl.class.noaa.gov/notification/pdfs/CLASS%20Data%20Access%20Tutorial_042015.pdf.

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