National Oceanic and Atmospheric Administration, United States Department of Commerce

  • Please read important message below! (1/16/2020):
    CLASS is undergoing extended maintenance, which has resulted in a delay of the current data being processed into the archive for search and access via subscriptions or ad hoc orders. Users may find gaps in the current data archive beginning around January 12, 2020. Rest assured that we do expect this maintenance to conclude soon. However, it will take several days for CLASS to fully catch-up in populating its inventories assuming normal processing. We apologize for any inconvenience this delay is causing.

  • Attention AVHRR data users! (8/27/2019):
    Beginning on August 27, 2019, the POES LAC data production for all satellites has been terminated. For CLASS, this means we will no longer be ingesting AVHRR_LAC (e.g. NSS.LHRR.NP.*.XX) legacy data from our data provider. Please contact the CLASS Helpdesk if you have any questions or need assistance selecting similar products from CLASS.

  • More Product Releases for GOES-17 (8/5/2019):
    The majority of GOES-17 ABI L2+ Products have reached Provisional Validation maturity. These data are available to the public along with the older data at Beta maturity. It is important to know the maturity level of each product you order by referring to the Readmes located at to fully understand the quality and limitations of each product.

    These products are grouped together with the ABI Level 1b and L2 Cloud and Moisture Products under the GOES-R Series ABI Products GRABIPRD CLASS search page.

    For GOES-17 ABI performance issues go to

    Most of GOES-16 products are at Provisional Maturity with Full Maturity (highest quality level) given for ABI Level 1B Radiance data and Cloud and Moisture Imagery products.

  • 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.