GHRSST NOAA/STAR ACSPO v2.81 0.02 degree L3S Daily Dataset from LEO Satellites (GDS version 2)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: October 04, 2025 | Last Modified: 2025-10-03T00:00:00.000+00:00

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 and AM 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), and monitored in another NOAA system, SST Quality Monitor (SQUAM) Version Description: Advanced Clear Sky Processor for Ocean version 2.81.

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Complete Metadata

describedByType	application/octet-steam
identifier	gov.noaa.nodc:GHRSST-L3S_LEO_DY-STAR
issued	2024-01-22T00:00:00.000+00:00
landingPage	https://www.ncei.noaa.gov/contact
language	[]
references	[ "https://doi.org/10.1117/12.2620103", "https://cmr.earthdata.nasa.gov/search/concepts/C2805339147-POCLOUD.html", "https://doi.org/10.3390/rs15235589", "https://doi.org/10.1117/12.2585819", "https://doi.org/10.3390/rs14143476", "https://www.star.nesdis.noaa.gov/socd/sst/arms/", "https://www.star.nesdis.noaa.gov/socd/sst/iquam/", "https://www.star.nesdis.noaa.gov/socd/sst/squam/", "https://www.ncei.noaa.gov/archive/accession/0123222" ]
rights	otherRestrictions
spatial	179.99,-89.99,-179.99,89.99
temporal	2023-05-21T00:00:00+00:00/2023-05-21T00:00:00+00:00