NOAA CoastWatch co-gridded VIIRS SST from ACSPO

NOAA CoastWatch co-gridded VIIRS SST products are Level 3 daily composites in compatible format and projection with other CoastWatch Level 3 sector and global products (such as CoastWatch sector VIIRS ocean color).  Twenty four CoastWatch sector files mapped to equatorial projection that cover the globe (see Description tab for sector definitions) two polar stereographic sectors in 750 m nominal, native resolution and a global, 4 km resolution, single file mapped product is also available. These CoastWatch Level 3 products are generated from ACSPO L2P SST as input.

    Data Access
    Global map projection displaying sea surface temperature data

    NOAA CoastWatch creates these co-gridded AVHRR SST Level 3 daily composites to be compatible in format and projection with the VIIRS Ocean Color Level 3 daily composites (Note VIIRS sector full resolution is 750m).  The input for these CoastWatch Sector SST files is daily, near real time ACSPO SST for AVHRR. 

    These SST products are intended for users who seek AVHRR ACSPO SST data co-registered with CoastWatch ocean color data from AVHRR and are not the NOAA operational L3U ACSPO products. The CoastWatch co-gridded products are available in regional Sectors at full 1.2 kilometer AVHRR resolution and as global products at 4 km resolution.  The regional products consist of 24 sectors (see Sector map below) mapped to the VIIRS ocean color sectors, and polar stereographic regions NP06 and SP06 mapped identically to the CoastWatch VIIRS ice products.  The 4 km global product is also mapped identically to the corresponding CoastWatch VIIRS ocean color product.

    CoastWatch Regions
    CoastWatch Regional Sectors

     

    These products start with the operational ACSPO L2P product (in the canonical ten-minute granule form), ingest that for CoastWatch processing, and then georegister and mask those granule-level products.  The mask applied is 0xC002.That rejects pixels flagged 0x40, 0x80, and 0xC0 (anything but confident clear) and pixels flagged 0x02 (land).  The L3 masked granule products are aggregated to a daily product on the same grid on the basis of the last pixel seen.  The 4 km global product is created by averaging the non-null values for the pixels of the daily sector maps in a 5x5 grid.

    Note: CoastWatch also distributes a gap-filled polar plus geosynchronous blended daily SST analysis product suite at 5 km resolution.

    Short Names
    CW Sector SST
    Temporal Coverage

    Daily

    Product Families
    Sea Surface Temperature
    Measurements
    Sea Surface Temperature - Polar-orbiting
    Processing Levels
    Level 3
    Latency Groups
    0 Hours <= 24 Hours (NRT)
    Latency Details

    ~12-24 h

    Spatial Resolution Groups
    100m < 2km
    2km+
    Spatial Resolution Details

    Global in 24 CoastWatch Sectors (24 separate files at nominal 750 m resolution) 
    Global 4 km (in 1 file)

    Data Providers
    NOAA
    NESDIS
    STAR
    SST Team
    Spatial Coverage

    Global

    Description

    180W - 180E
    90N - 90S

    CoastWatch Global Sectors

    Description

    The 24 sectors identified for file naming convention when referring to VIIRS data. 

    Image
    Map showing grid of CoastWatch VIIRS Sectors

    ACSPO

    Description

     Advanced Clear Sky Processor for Ocean (ACSPO) is the NOAA Enterprise SST system

    MetOp

    Description

    Meteorological Operational satellite - A / B / C

    Platform Type
    Low Earth Orbit Satellite (LEO)
    Instruments
    Organizations
    ESA
    EUMETSAT
    Orbital Altitude
    827 km
    Equatorial Crossing Times
    07:50 desc

    NOAA

    Description

    National Oceanic and Atmospheric Administration - 17 / 18 / 19 / 20 / 21

    Platform Type
    Low Earth Orbit Satellite (LEO)
    Instruments
    Organizations
    NASA
    NOAA
    Orbital Altitude
    834 km
    Equatorial Crossing Times
    13:25 asc

    SNPP

    Description

    Suomi National Polar-orbiting Partnership

    Platform Type
    Low Earth Orbit Satellite (LEO)
    Instruments
    Organizations
    NASA
    NOAA
    Orbital Altitude
    833 km
    Equatorial Crossing Times
    13:25 asc

    AVHRR

    Description

    Advanced Very High Resolution Radiometer

    Platforms
    Instrument Types
    Imager
    Organizations
    NOAA

    VIIRS

    Description

    Visible Infrared Imaging Radiometer Suite

    Platforms
    Instrument Types
    Imager
    Organizations
    NASA

    ** When you use our data, please reference the product citation (if available) and acknowledge "NOAA CoastWatch" **