GHRSST Level 3U OSPO dataset v2.61 from VIIRS on NOAA-20 Satellite (GDS v2)
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| DOI | 10.5067/GHV20-3UO61 |
| Short Name | VIIRS_N20-OSPO-L3U-v2.61 |
| Description | NOAA-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). |
| Version | 2.61 |
| Dataset Type | OPEN |
| Measurement | Oceans > Ocean Temperature > Sea Surface Temperature > Skin Sea Surface Temperature |
| Processing Level | 3U |
| Coverage | Region: Global Northernmost Latitude: 90 degrees Southernmost Latitude: -90 degrees Westernmost Longitude: -180 degrees Easternmost Longitude: 180 degrees Time Span: 2018-Jan-05 to Present |
| Resolution | Spatial Resolution: 0.02 degrees (Latitude) x 0.02 degrees (Longitude) Temporal Resolution: 12 Hour |
| Projection | Type: Gridded Detail: Geolocation information included for each pixel Ellipsoid: WGS 84 |
| Latency | 6 hours |
| Platform/Sensor | NOAA-20 / Platform Name: National Oceanic & Atmospheric Administration-20 (NOAA-20) Orbit Period: 102 minutes Inclination Angle: 99 degrees Ascending Node: 1970-Jan-01 00:00:00 VIIRS SENSOR Name: Visible Infrared Imaging Radiometer Suite (VIIRS) Swath Width: 3040 km Description: VIIRS is a 22-band radiometer to collect infrared and visible light for earth system monitoring |
| Project | Group for High Resolution Sea Surface Temperature (GHRSST) |
| Data Provider | Creator: NOAA Office of Satellite and Product Operations (OSPO) Release Place: Suitland, MD, USA Release Date: 2019-May-15 Resource: http://www.star.nesdis.noaa.gov |
| Keyword(s) | NOAA, JPSS, VIIRS, OSPO, ACSPO, sea surface temperature, SST, L3U, GHRSST, GDS2, ospo, N-20, N20, v2.61 |
| Persistent ID | PODAAC-GHV20-3UO61 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| User's Guide | |
| GDS2 User Manual | https://podaac-tools.jpl.nasa.gov/drive/files/OceanTemperature/ghrsst/docs/GDS20r5.pdf Documentation on the GDS version 2 format specification |
| Project Materials | |
| ACSPO Documents | ftp://ftp.star.nesdis.noaa.gov/pub/sod/osb/aignatov/ACSPO/ Samples, Interface Control Document describing file contents, background ppt and other info |
| GHRSST Project | https://ghrsst.jpl.nasa.gov Portal to the GHRSST Global Data Assembly Center and data access |
| Journal References | |
| Petrenko, B., et al., 2010 | https://journals.ametsoc.org/doi/abs/10.1175/2010JTECHA1413.1 Petrenko, B., A. Ignatov, Y. Kihai, and A. Heidinger, 2010: Clear-Sky Mask for ACSPO. JTech, 27, 1609-1623 |
| Petrenko, B., et al., 2014 | https://onlinelibrary.wiley.com/doi/10.1002/2013JD020637/abstract Petrenko, B., A. Ignatov, Y. Kihai, J. Stroup, P. Dash, 2014: Evaluation and Selection of SST Regression Algorithms for JPSS VIIRS. JGR, 119, 4580-4599, doi: 10.1002/2013JD020637 |
| Additional Sites | |
| SQUAM | https://www.star.nesdis.noaa.gov/sod/sst/squam/ Dash, P., A. Ignatov, Y. Kihai |
| IQUAM | https://www.star.nesdis.noaa.gov/sod/sst/iquam/ Xu, F. |
| MICROS | https://www.star.nesdis.noaa.gov/sod/sst/micros/ Liang, X. |
| FAQs | |
| What is SST ? | https://podaac.jpl.nasa.gov/forum/viewtopic.php?f=7&t=298 |
| Citation | NOAA Office of Satellite and Product Operations (OSPO). 2019. GHRSST Level 3U OSPO dataset v2.61 from VIIRS on NOAA-20 Satellite (GDS v2). Ver. 2.61. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHV20-3UO61.
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Petrenko, B., A. Ignatov, Y. Kihai, J. Stroup, and P. Dash, 2014, Evaluation and selection of SST regression algorithms for JPSS VIIRS, J. Geophys. Res. Atmos., 119, doi:10.1002/2013JD020637 | |||||||
