GHRSST Level 3U OSPO dataset v2.61 from VIIRS on NOAA-20 Satellite (GDS v2)
DOI10.5067/GHV20-3UO61
Short NameVIIRS_N20-OSPO-L3U-v2.61
DescriptionNOAA-20 (hereafter, N20; also known as JPSS-1 or J1 prior to launch) is the second satellite in the US National Oceanic and Atmospheric Administration (NOAA) latest generation Joint Polar Satellite System (JPSS). N20 was launched on November 18, 2017. In conjunction with the first US satellite in JPSS series, Suomi National Polar-orbiting Partnership (S-NPP) satellite launched on October 28, 2011, N20 form the new NOAA polar constellation. The ACSPO N20/VIIRS L3U (Level 3 Uncollated) product is a gridded version of the ACSPO N20/VIIRS L2P product available here https://podaac.jpl.nasa.gov/dataset/VIIRS_N20-OSPO-L2P-v2.61. The L3U output files are 10-minute granules in netCDF4 format, compliant with the GHRSST Data Specification version 2 (GDS2). There are 144 granules per 24hr interval, with a total data volume of 500MB/day. Fill values are reported at all invalid pixels, including pixels with >5 km inland. For each valid water pixel (defined as ocean, sea, lake or river, and up to 5 km inland), the following layers are reported: SSTs, ACSPO clear-sky mask (ACSM; provided in each grid as part of l2p_flags, which also includes day/night, land, ice, twilight, and glint flags), NCEP wind speed, and ACSPO SST minus reference (Canadian Met Centre 0.1deg L4 SST; available at https://podaac.jpl.nasa.gov/dataset/CMC0.1deg-CMC-L4-GLOB-v3.0 ). Only L2P SSTs with QL=5 were gridded, so all valid SSTs are recommended for the users. Per GDS2 specifications, two additional Sensor-Specific Error Statistics layers (SSES bias and standard deviation) are reported in each pixel with valid SST. The ACSPO VIIRS L3U product is monitored and validated against iQuam in situ data (Xu and Ignatov, 2014) in SQUAM (Dash et al, 2010).
Version2.61
Dataset TypeACTIVE
MeasurementSEA SURFACE TEMPERATURE > OCEAN TEMPERATURE > OCEANS > Skin Sea Surface Temperature
Processing Level3U
CoverageNorth Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2018-Jan-05 to Present
Granule Time Span: 2018-Jan-05 to 2020-Oct-26
ResolutionSpatial Resolution: 0.02 degrees (Latitude) x 0.02 degrees (Longitude)
Temporal Resolution: 12 Hour
ProjectionEllipsoid: WGS 84
Platform/Sensor
NOAA-20
Platform
Name: National Oceanic & Atmospheric Administration-20 (NOAA-20)
Orbit Period: 102.0 minutes
Inclination Angle: 99.0 degrees
/
VIIRS
SENSOR
Name: Visible Infrared Imaging Radiometer Suite (VIIRS)
Swath Width: 3040.0 meters
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectGroup for High Resolution Sea Surface Temperature (GHRSST)
Data ProviderPublisher: NOAA Office of Satellite and Product Operations (OSPO)
Creator: NOAA Office of Satellite and Product Operations (OSPO)
Release Place: Suitland, MD, USA
Release Date: 2019-May-15
Keyword(s)NOAA, JPSS, VIIRS, OSPO, ACSPO, sea surface temperature, SST, L3U, GHRSST, GDS2, ospo, N-20, N20, v2.61
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
USER'S GUIDE
GENERAL DOCUMENTATION
Citation NOAA Office of Satellite and Product Operations (OSPO). 2019. Sea Surface temperature retrievals produced by NOAA/NESDIS/STAR office from VIIRS sensor. Ver. 2.61. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHV20-3UO61

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