GHRSST Level 2P NOAA STAR SST v2.80 from VIIRS on NOAA-20 Satellite

Description

NOAA-20 (N20/JPSS-1/J1) is the second satellite in the US NOAA latest generation Joint Polar Satellite System (JPSS), launched on November 18, 2017. NOAA is responsible for all JPSS products, including SST from the Visible Infrared Imaging Radiometer Suite (VIIRS). The L2P SST product is derived at the native sensor resolution (~0.75 km at nadir, ~1.5 km at swath edge) using NOAA's Advanced Clear-Sky Processor for Ocean (ACSPO) system, and reported in 10-minute granules in netCDF4 format, compliant with the Group for High Resolution Sea Surface Temperature (GHRSST) Data Specification version 2 (GDS2). SSTs are derived from Brightness Temperatures (BTs) using the Non-Linear SST (NLSST) algorithms (Petrenko et al., 2014). An ACSPO clear-sky mask (ACSM) is provided in each pixel as part of variable l2p_flags, which also includes day/night, land, ice, twilight, and glint flags (Petrenko et al., 2010). Only ACSM confidently clear pixels are recommended (equivalent to GDS2 quality level=5). Per GDS2 specifications, two additional Sensor-Specific Error Statistics layers (SSES bias and standard deviation) are reported in each pixel with QL=5. The ACSPO VIIRS L2P product is monitored and validated against quality controlled in situ data provided by NOAA in situ SST Quality Monitor system (iQuam) using another NOAA system, SST Quality Monitor (SQUAM). A reduced size (0.5GB/day), equal-angle gridded (0.02-deg resolution), ACSPO L3U product is also available at https://podaac.jpl.nasa.gov/dataset/VIIRS_N20-STAR-L3U-v2.80, where gridded L2P SSTs with QL=5 only are reported. The v2.80 is an updated version from the v2.61 with several algorithm improvements including two added thermal front layers, reduced L2P SST data size, mitigated warm biases in the high latitudes, and improved clear-sky mask.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FGHV20-2PO28
21 In situ SST Quality Monitor (iQuam) https://www.star.nesdis.noaa.gov/sod/sst/iquam/
33 GHRSST Data User Guide https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/ghrsst/open/docs/GDS20r5.pdf
21 Data Use and Citation Policy https://podaac.jpl.nasa.gov/CitingPODAAC
21 Monitoring of IR Clear-sky Radiances over Oceans for SST https://www.star.nesdis.noaa.gov/sod/sst/micros/
21 GHRSST Global Data Assembly Center https://ghrsst.jpl.nasa.gov
22 Thumbnail https://podaac.jpl.nasa.gov/Podaac/thumbnails/VIIRS_N20-STAR-L2P-v2.80.jpg
21 Generic Data Readers https://github.com/podaac/data-readers
21 SST Quality Monitor (SQUAM) https://www.star.nesdis.noaa.gov/sod/sst/squam/
21 HTTPS endpoint for data browse and download https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2147478146-POCLOUD
21 Browse granule search results in Earthdata Search https://search.earthdata.nasa.gov/search/granules?p=C2147478146-POCLOUD
21 GHRSST Project https://www.ghrsst.org/
21 Sea Surface Temperature measurement description https://podaac.jpl.nasa.gov/forum/viewtopic.php?f=7&t=298

Tags

  • oceans
  • ocean-temperature
  • earth-science

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