GHRSST NOAA/STAR ACSPO v2.81 0.02 degree L3S Daily Dataset from LEO Satellites
(L3S_LEO_DY-STAR-v2.81)| Version | 2.81 |
| Processing Level | 3 |
| Start/Stop Date | 2000-Feb-24 to Present |
| Short Name | L3S_LEO_DY-STAR-v2.81 |
| Description | The L3S_LEO_DY-STAR-v2.81 dataset produced by the NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) system derives the Subskin Sea Surface Temperature (SST) from multiple instruments, including the VIIRS onboard the Suomi-NPP, NOAA-20 and NOAA-21 satellites, AVHRR onboard Metop-A, B , C satellites and MODIS onboard the Terra and Aqua satellites. The L3S-LEO is a family of multi-sensor super-collated (L3S) gridded 0.02º resolution SST products from low earth orbit (LEO) satellites. The L3S-LEO PM ( https://doi.org/10.5067/GHLPM-3S281 ) and AM ( https://doi.org/10.5067/GHLAM-3SS28 ) data include SSTs from afternoon (~1:30 am/pm) and mid-morning (~9:30 am/pm) satellites, respectively. The PM and AM SSTs, for both day (D) and night (N), and Terra MODIS SSTs, are further aggregated into a daily L3S-LEO-DY SST product. The L3S-DY-SST combines the both L3S-LEO-PM/AM SSTs into a single daily product. It covers from 2000-02-24 to present and is reported in one file per 24h interval. Data are in NetCDF4 format, compliant with the GHRSST Data Specification version 2 (GDS2). The v2.81 succeeds the v2.80 dataset (not available from the PO.DAAC) with the following improvements: (1) The L3S-LEO-PM input was updated from v2.80 to v2.81; and (2) ACSPO Terra MODIS SST is included from 2000-02-24 to 2021-12-31. The inclusion of Terra extends the availability of L3S-LEO-DY back to 2000-02-24 (from 2006-12-01 in v2.80). The SST diurnal warming effects from different daily observation times across the series of instruments have been corrected and are described in the publications by Jonasson et al., 2022 The Near Real Time (NRT) data are available with 6h latency, and replaced by the Re-ANalysis (RAN) files in 2 months, with identical file names. They can be differentiated by the file creation time and ancillary inputs. The data are validated against quality controlled in situ data from the NOAA in situ SST Quality Monitor (iQuam; https://www.star.nesdis.noaa.gov/socd/sst/iquam ), and monitored in another NOAA system, SST Quality Monitor (SQUAM; https://www.star.nesdis.noaa.gov/socd/sst/squam ) |
| DOI | 10.5067/GHLDY-3S281 |
| Measurement | OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE |
| Platform/Sensor | Suomi-NPP / Platform Name: Suomi National Polar-orbiting Partnership (Suomi-NPP) VIIRS SENSOR Name: Visible-Infrared Imager-Radiometer Suite (VIIRS) NOAA-20 / Platform Name: Joint Polar Satellite System - 1 (NOAA-20) VIIRS SENSOR Name: Visible-Infrared Imager-Radiometer Suite (VIIRS) NOAA-21 / Platform Name: Joint Polar Satellite System - 2 (NOAA-21) VIIRS SENSOR Name: Visible-Infrared Imager-Radiometer Suite (VIIRS) METOP-A / Platform Name: Meteorological Operational Satellite - A (METOP-A) AVHRR SENSOR Name: Advanced Very High Resolution Radiometer (AVHRR) METOP-B / Platform Name: Meteorological Operational Satellite - B (METOP-B) AVHRR SENSOR Name: Advanced Very High Resolution Radiometer (AVHRR) Show More |
| Project | Group for High Resolution Sea Surface Temperature (GHRSST) |
| Data Provider | Publisher: PO.DAAC Creator: NOAA/STAR Release Date: 2023-Dec-13 |
| Format | netCDF-4 |
| Keyword(s) | GHRSST, SST, ACSPO, STAR, LEO, v2.81, LEO_DY, NOAA, L3S |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Spatial Resolution: 0.02 Decimal Degrees x 0.02 Decimal Degrees Temporal Resolution: Daily - < Weekly Coverage North Bounding Coordinate: 90 degrees South Bounding Coordinate: -90 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2000-Feb-24 to Present Granule Time Span: 2000-Feb-24 to 2025-Oct-05 Projection Ellipsoid: WGS 84 |
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| Available for access in-region with AWS Cloud | |
Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/L3S_LEO_DY-STAR-v2.81/ | |
| podaac-ops-cumulus-public/L3S_LEO_DY-STAR-v2.81/ | |
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| Name | Long Name | Unit |
|---|---|---|
| crs | coordinate reference system | |
| dt_analysis | deviation from SST reference | kelvin |
| l2p_flags | L2P flags | |
| l3s_flags | L3S flags | |
| lat | latitude | degrees_north |
| lon | longitude | degrees_east |
| measurement_dtime | time difference of highest weighted input SST from reference time. Is equal to sst_dtime for pixels where L3S-LEO-PM_N is available | seconds |
| quality_level | quality level of SST pixel | |
| satellite_zenith_angle | satellite zenith angle | degrees |
| sea_ice_fraction | sea ice fraction | 1 |
| sea_surface_temperature | sea surface sub-skin temperature | kelvin |
| sses_bias | SSES bias estimate | kelvin |
| sses_standard_deviation | SSES standard deviation | kelvin |
| sst_count | Count of input L3U SST pixels | |
| sst_dtime | time difference from reference time | seconds |
| sst_front_position | Binary SST front position indicator | |
| sst_gradient_magnitude | SST gradient magnitude value | kelvin/km |
| sst_source | Source of major (highest weight) contribution to sst | |
| time | reference time of sst file | seconds since 1981-01-01 00:00:00 |
| wind_speed | wind speed | m s-1 |
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Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
| Citation | NOAA/STAR. 2023. GHRSST NOAA/STAR ACSPO v2.81 0.02 degree L3S Daily Dataset from LEO Satellites. Ver. v2.81. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHLDY-3S281
For more information see Data Citations and Acknowledgments.
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| Journal Reference | O. Jonasson, I. Gladkova, A. Ignatov, Y. Kihai. 2021. Algorithmic improvements and consistency checks of the NOAA global gridded super-collated SSTs from low Earth orbiting satellites ACSPO L3S-LEO, SPIE Defense + Commercial Sensing 2021. https://doi.org/10.1117/12.2585819 O. Jonasson, I. Gladkova, A. Ignatov, Y. Kihai. 2022. Towards global daily gridded super-collated SST product from low earth orbiting satellites (L3S-LEO-Daily) at NOAA, SPIE Defense + Commercial Sensing , 12118. https://doi.org/10.1117/12.2620103 O. Jonasson, A. Ignatov, V. Pryamitsyn, B. Petrenko, Y. Kihai. 2022. JPSS VIIRS SST Reanalysis Version 3, Remote Sens., 14, 14. https://doi.org/10.3390/rs14143476 O. Jonasson, A. Ignatov, V. Pryamitsyn, B. Petrenko, Y. Kihai. 2023. NOAA MODIS SST Reanalysis Version 1, Remote Sens., 15, 23. https://doi.org/10.3390/rs15235589 |
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