GHRSST NOAA/STAR GOES-17 ABI L2P America Region SST v2.71 dataset in GDS2
DOI10.5067/GHG17-2PO71
Short NameABI_G17-STAR-L2P-v2.71
DescriptionGOES-17 (G17) is the second satellite in the US NOAA's GOES-R series. It was launched on 1 Mar 2018 in an interim position at 89.5-deg W for initial Cal/Val, moved to its nominal position at 137.2-deg W in Nov 2018, and declared NOAA operational GOES-West satellite on 12 Feb 2019. Advanced Baseline Imager (ABI) is a 16 channel sensor, of which five (3.9, 8.4, 10.3, 11.2, 12.3 um) are suitable for SST. From altitude 35,800km, G17/ABI maps SST in a Full Disk (FD) area from 163E-77W and 60S-60N, with spatial resolution 2km/nadir to 15km/VZA 67-deg, and 10-min temporal sampling. The ABI L2P SST is derived at the native sensor resolution using NOAA ACSPO system. ACSPO processes every 10-min FD, identifies good-quality ocean pixels (Petrenko et al., 2010) and derives SST using Non-Linear SST (NLSST) algorithm (Petrenko et al., 2014). Unfortunately, the G17 ABI loop heat pipe (LHP) that should maintain the ABI at its intended temperature, is not operating at its designed capacity, which required mitigations to the ACSPO algorithms and releasing an updated ACSPO version 2.71 (Pennybacker et al, 2019). In particular, band 11.2um, most subject to calibration problems, is not used leading to a 3-band (8.4, 10.3, and 12.3um) NLSST, and increased calibration problems prevent SST retrievals at night. As a result, the G17 SST is only reported for 13 out of 24hrs/day, from 20UTC to 08UTC. The 10-min FD data are subsequently collated in time, to produce 1-hr product, with improved coverage and reduced cloud leakages and image noise. The collation algorithm also reduces G17 excessive sensor noise and striping to levels similar to G16. The collated SSTs are only reported over clear-sky water pixels. All pixels with valid SSTs are recommended for use. The L2P is reported in NetCDF4 GDS2 format, 13 granules per day, with a total data volume 0.3GB/day. ACSPO files also report sun-sensor geometry, wind speed and l2p_flags (day/night, land, ice, twilight, glint flags). Per GDS2 specifications, two Sensor-Specific Error Statistics (bias and standard deviation) are reported in each pixel (Petrenko et al., 2016). Pixel earth locations are not reported in the granules, as they remain unchanged from granule to granule. Those can be obtained using a flat lat/lon file or a Python script available at https://podaac-tools.jpl.nasa.gov/drive/files/allData/ghrsst/data/GDS2/L2P/GOES17/STAR/nav. The ACSPO G17 ABI SSTs are continuously validated in SQUAM (Dash et al, 2010). A reduced size (0.1GB/day), 0.02-deg equal-angle gridded L3C product is available at https://podaac.jpl.nasa.gov/dataset/ABI_G17-STAR-L3C-v2.71.
Version2.71
Dataset TypeACTIVE
MeasurementSEA SURFACE TEMPERATURE > OCEAN TEMPERATURE > OCEANS > SEA SURFACE SKIN TEMPERATURE
Processing Level2P
CoverageRegion: Eastern Pacific
North Bounding Coordinate: 59 degrees
South Bounding Coordinate: -59 degrees
West Bounding Coordinate: -135 degrees
East Bounding Coordinate: -15 degrees
Time Span: 2019-Feb-01 to Present
Granule Time Span: 2019-Oct-16 to 2020-Oct-16
ResolutionSpatial Resolution:
ProjectionEllipsoid: WGS 84
Swath Width7000.0 meters
Platform/Sensor
GOES-17
Platform
Name: GOES-S (GOES-17)
Orbit Period: 1436.1 minutes
Inclination Angle: 0.022 degrees
/
ABI
SENSOR
Name: Advanced Baseline Imager (ABI) (ABI)
Swath Width: 7000.0 meters
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectGroup for High Resolution Sea Surface Temperature (GHRSST)
Data ProviderPublisher: NOAA/NESDIS
Creator: NOAA/NESDIS USA, 5200 Auth Rd, Camp Springs, MD, 20746
Release Place: Camp Springs, MD (USA)
Release Date: 2020-May-21
Keyword(s)GHRSST, SST, GOES17, G17, OSPO, STAR, v2.71, ACSPO
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
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GENERAL DOCUMENTATION
Citation NOAA/NESDIS USA, 5200 Auth Rd, Camp Springs, MD, 20746. 2020. GHRSST NOAA/STAR GOES-17 ABI L2P America Region SST v2.71 dataset in GDS2. Ver. 2.71. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHG17-2PO71

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