National Oceanic and Atmospheric Administration, United States Department of Commerce

  • S-NPP Data Products Incorrect over the Southern Hemisphere (03/17/17):

    Details/Specifics of Change: IDPS VIIRS Moderate products and NDE downstream NUCAPS, VPW, VHP products are impacted due to incorrect S-NPP VIIRS Cloud Mask over the Southern Hemisphere


    • -Significant areas of the Southern Hemisphere, especially Antarctica, are incorrectly labeled as “snow/ice free.”
    • -The error is not seen in the Northern Hemisphere (NH).
    • -VIIRS products for the Southern Hemisphere are impacted in regions of snow and ice.
    • -VIIRS Gridded Snow/Ice Rolling Tiles are also incorrect over the Southern Hemisphere.
    • -The root cause is incorrect processing of the NOAA Global Automated Multi-sensor Snow/Ice (GMASI) ancillary data.
    • -Developers are currently working to implement a fix.

    Contact Information for Further Information: ESPC Operations at at 301-817-3880

  • Suomi NPP data access status (updated 01/11/17):
    The majority of S-NPP products are available for ordering through CLASS website. These products are grouped under JPSS and S-NPP on the drop down product list. It is important to note the product/algorithm maturity levels from beginning dates to current dates by visiting the STAR JPSS Algorithm Maturity website at

    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.