GHRSST Level 2P NOAA ACSPO SST v2.80 from VIIRS on NOAA-21 Satellite

Description

The N21-VIIRS-L2P-ACSPO-v2.80 dataset produced by the NOAA ACSPO system derives the Subskin Sea Surface Temperature (SST) from the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the The Joint Polar Satellite System (JPSS)-2 satellite, renamed as NOAA-21 (N21). N21 was launched on Nov. 10, 2022, the 3rd satellite in the US NOAA latest JPSS series.

VIIRS L2P SST products are 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 (Jonasson et al. 2022). Data are reported in 10-minute granules in netCDF4 format, compliant with the Group for High Resolution Sea Surface Temperature (GHRSST) Data Specification version 2 (GDS2). The ACSPO N21 VIIRS SST record is available back to 19 Mar 2023. In ACSPO products, SSTs are derived 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 with quality level QL=5 are recommended. 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 N21 VIIRS L3U product is also available (10.5067/GHV21-3U290) (Ignatov et al., 2017).

Resources

Name Format Description Link
21 In situ SST Quality Monitor (iQuam) https://www.star.nesdis.noaa.gov/sod/sst/iquam/
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 GHRSST Project https://www.ghrsst.org/
21 Sea Surface Temperature measurement description https://podaac.jpl.nasa.gov/forum/viewtopic.php?f=7&t=298
21 Data Use and Citation Policy https://podaac.jpl.nasa.gov/CitingPODAAC
21 JPSS VIIRS SST Reanalysis Version 3 https://doi.org/10.3390/rs14143476
21 JPSS VIIRS level 3 uncollated sea surface temperature product at NOAA https://doi.org/10.1117/1.JRS.11.032405
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FGHN21-2P280
21 Browse granule search results in Earthdata Search https://search.earthdata.nasa.gov/search/granules?p=C2147478146-POCLOUD
33 GHRSST Data User Guide https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/ghrsst/open/docs/GDS20r5.pdf
21 Monitoring of IR Clear-sky Radiances over Oceans for SST https://www.star.nesdis.noaa.gov/sod/sst/micros/

Tags

  • oceans
  • ocean-temperature
  • earth-science

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