National Oceanic and Atmospheric Administration, United States Department of Commerce

Search - JPSS_SND

Data Description

    JPSS Sounder Products (JPSS_SND) - Cross-track Infrared Sounder (CrIS) and Advanced Technology Microwave Sounder (ATMS) sensor data records and intermediate products from the Joint Polar Satellite System (JPSS) have been used to generate these Level 2 granule sounding products. The Microwave Integrated Retrieval System (MIRS) ATMS precipitation and surface product, or imaging (IMG) products file, contains total precipitable water (TPW), skin temperature, emissivity by channel, rain rate, cloud liquid water (CLW), rain water path (RWP), ice water path (IWP), liquid water path (LWP), sea ice concentration, snow water equivalent (SWE), snow cover extent, and surface type classification. The MIRS ATMS sounding (SND) products file contains temperature and water vapor profiles at 850, 900 and 950 millibars. Quality control metrics and flags defining retrieval product quality are also provided in the MIRS output. The NOAA-Unique CrIS-ATMS Processing System (NUCAPS) produces Cloud-Cleared Radiances (CCRs) from CrIS observations that are co-located with ATMS. The EDR product consists of retrieved estimates of hydrological variables including temperature, water vapor, cloud fraction and cloud top pressure, along with trace gas retrievals including ozone (O3), methane (CH4), carbon monoxide (CO), carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen dioxide (N2O), and nitric acid (HNO3), and a flag indicating the presence of dust and volcanic emissions. These archived products are distributed in the native 32-second granularity in netCDF-4 file format with metadata attributes included. Please expand "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

Details - Metadata, Documentation


    (Posted 12/06/2017) Daily tar files of the products for the most recent 90 days are available via anonymous FTP download at

    (Posted 12/06/2017) For the initial data ingest, there is a known problem that results in a small percentage of daily MIRS and NUCAPS granules not being archived. Because of this, the CLASS archive may yield gaps or missing granules in temporal and spatial searches for these products. This problem is expected to be corrected by June 2014. It is not possible for the data that was not archived to be retrospectively added to back-fill these missing granules.



(maximum range is 366 days)

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MIRS Precipitation and Surface Products
MIRS Sounding Products
NUCAPS Cloud Cleared Radiances
NUCAPS Environmental Data Records
NUCAPS Outgoing Longwave Radiation


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