GHRSST NOAA/STAR Metop-C AVHRR FRAC ACSPO v2.80 1km L2P Dataset (GDS v2)

(AVHRRF_MC-STAR-L2P-v2.80)
1 Publication Cited this Dataset
Citation metrics available for years (2014-2022)
Version2.80
Processing Level2P
Start/Stop Date2018-Dec-04 to Present
Short NameAVHRRF_MC-STAR-L2P-v2.80
DescriptionThe MetOp First Generation (FG) is a European multi-satellite program jointly established by ESA and EUMETSAT, comprising three satellites, MetOp-A, -B and -C. The primary sensor onboard MetOp-FG, the Advanced Very High Resolution Radiometer/3 (AVHRR/3) contributed by NOAA, measures Earth emissions and reflectances in 5 out of 6 available bands (centered at 0.63, 0.83, 1.61, 3.7, 11 and 12 microns), in a swath of 2,600km from an 817km altitude. These data are collected in a Full Resolution Area Coverage (FRAC) mode, with pixel size of 1.1km at nadir. Metop-C launched on 7 November 2018 is the third and last in the MetOp-FG series. The NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) Level 2 Preprocessed (L2P) SST product is derived at the full AVHRR FRAC resolution and reported in 10 minute granules in NetCDF4 format, compliant with the GHRSST Data Specification version 2 (GDS2). Subskin SSTs are derived using the regression Nonlinear SST (NLSST) algorithm, which employs three bands (3.7, 11 and 12 microns) at night and two bands (11 and 12 microns) during the day. The ACSPO AVHRR FRAC L2P product is monitored and validated against quality controlled in situ data, provided by the NOAA in situ SST Quality Monitor system (iQuam; Xu and Ignatov, 2014, https://doi.org/10.1175/JTECH-D-13-00121.1 ), in another NOAA system, SST Quality Monitor (SQUAM; Dash et al, 2010, https://doi.org/10.1175/2010JTECHO756.1 ). SST imagery and clear-sky masking are continuously evaluated, and checked for consistency with other sensors and platforms, in the ACSPO Regional Monitor for SST (ARMS) system. MetOp-A orbital characteristics and AVHRR/3 sensor performance are tracked in the NOAA 3S system (He et al., 2016, https://doi.org/10.3390/rs8040346 ).The L2P Near Real Time (NRT) SST files are archived at PO.DAAC with 3-6 hours latency, and then replaced by the Re-ANalysis (RAN) SST after about 2 months later with identical file names. Two features can be used to identify them: different file name time stamps and netCDF global attribute metadata source=NOAA-NCEP-GFS for NRT and source=MERRA-2 for RAN. A reduced size (0.45GB/day), equal-angle gridded (0.02-deg resolution) ACSPO L3U product is available at https://doi.org/10.5067/GHMTC-3US28
DOI10.5067/GHMTC-2PS28
MeasurementOCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE
Swath Width2400 km
Platform/Sensor
METOP-C
Platform
Name: Meteorological Operational Satellite - C (METOP-C)
Orbit Period: 101.3 minutes
Inclination Angle: 98.7 degrees
/
AVHRR-3
SENSOR
Name: Advanced Very High Resolution Radiometer-3 (AVHRR-3)
Swath Width: 2400.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectGroup for High Resolution Sea Surface Temperature (GHRSST)
Data ProviderPublisher: PO.DAAC
Creator: NOAA/STAR
Release Place: Camp Springs, MD (USA)
Release Date: 2021-Apr-05
Resource: https://podaac.jpl.nasa.gov/GHRSST

FormatnetCDF-4
Keyword(s)GHRSST, sea surface temperature, AVHRR, SST, STAR, MetOp, v2.80, MetOp-C, NOAA
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Spatial Resolution: 1100 Meters x 1100 Meters
Temporal Resolution: Hourly - < Daily
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2018-Dec-04 to Present
Granule Time Span: 2018-Dec-04 to 2024-Oct-04
Swath Width: 2400 km
 
Projection
Projection Type: Satellite native swath
Projection Detail: Geolocation information included for each pixel
Ellipsoid: WGS 84
 
NameLong NameUnit
dt_analysisdeviation from SST referencekelvin
l2p_flagsL2P flags
latlatitudedegrees_north
lonlongitudedegrees_east
quality_levelquality level of SST pixel
satellite_zenith_anglesatellite zenith angledegrees
sea_ice_fractionsea ice fraction1
sea_surface_temperaturesea_surface_subskin_temperaturekelvin
sses_biasSSES bias estimatekelvin
sses_standard_deviationSSES standard deviationkelvin
sst_dtimetime difference from reference timeseconds
sst_front_positionBinary SST front position indicator
sst_gradient_magnitudeSST gradient magnitude valuekelvin/km
timereference time of sst fileseconds since 1981-01-01 00:00:00
wind_speedwind speedm 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. 2021. GHRSST L2P Metop-C AVHRR FRAC ACSPO v2.80 1km Dataset. Ver. 2.80. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/GHMTC-2PS28

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For more information see Data Citations and Acknowledgments.
Journal Reference Pryamitsyn, Victor, Boris Petrenko, Alexander Ignatov, and Yury Kihai. 2021. "Metop First Generation AVHRR FRAC SST Reanalysis Version 1" Remote Sensing 13, no. 20: 4046. https://doi.org/10.3390/rs13204046

Pryamitsyn, V.; Petrenko, B.; Ignatov, A.; Kihai, Y.. 2021. Metop First Generation AVHRR FRAC SST Reanalysis Version 1, Remote Sensing, 13, 20. https://doi.org//10.3390/rs13204046