National Oceanic and Atmospheric Administration, United States Department of Commerce

  • Celebrating 5 Year Anniversary for Suomi NPP (10/28/16):
    Suomi National Polar-orbiting Partnership (S-NPP) is celebrating its 5 year anniversary from launch on 10/28/2011. We'd like to congratulate the Joint Polar Satellite System (JPSS) program for a successful satellite launch and the continued orbit and data transmission back to earth. We would also like to congratulate the NOAA JPSS ground system for tracking, receiving and transmitting the data to CLASS for archival and access. To date, the CLASS has archived 5.64 Petabytes of S-NPP data with more than 18 Petabytes of data delivered to its user community. Congratulations to all!

  • Suomi NPP data access status (updated 02/25/16):
    The majority of S-NPP products are available for ordering through CLASS. For those datasets available for public access the begin dates are indicated next to the product names under the many JPSS search pages. A complete table of SNPP products showing product maturity level date ranges has recently been added to the CLASS FAQ under the NPP FAQ section. Also, links to the Readme files have been moved from the CLASS front page to this table located at the following URL:

    For further assistance please check out the STAR Science Documents website for JPSS Algorithm Theoretical Basis Documents (ATBD), Users Guides, Cal/Val plans, and much more. If you have any questions please email the CLASS Help Desk.

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

  • New tutorial on how to search and order data in CLASS! (04/27/15):
    A tutorial for searching and ordering data through CLASS can be found here: CLASS Data Access Tutorial. The tutorial gives a step by step screen capture views of the searching and ordering process from registering with CLASS to checking on the status of your order. It also covers the various levels of access services offered from CLASS at this time. If you have any questions please email the CLASS Help Desk.