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ERDDAP > info > noaacwLEOACSPOSSTL3SCDaily

Title Sum-
Institution Dataset ID
 data       graph  M    public Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal
Fronts Reanalysis, 2012-present, Daily (L3S-LEO degrees C)
   ?   F   I   M   background (external link) RSS Subscribe NOAA/NESDIS/STAR noaacwLEOACSPOSSTL3SCDaily

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL acknowledgement String Please acknowledge the use of these data with the following statement: These data were provided by Group for High Resolution Sea Surface Temperature (GHRSST) and the National Oceanic and Atmospheric Administration (NOAA).
attribute NC_GLOBAL aggregator_version String V1.00
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL col_count int 18000
attribute NC_GLOBAL col_start int 0
attribute NC_GLOBAL collation_version String 2.7.0
attribute NC_GLOBAL comment String SSTs are a weighted average of the SSTs of contributing pixels. WARNING: some applications are unable to properly handle signed byte values. If byte values > 127 are encountered, subtract 256 from this reported value.
attribute NC_GLOBAL Conventions String CF-1.7, ACDD-1.3, COARDS
attribute NC_GLOBAL creator_email String Alex.Ignatov at
attribute NC_GLOBAL creator_name String Alex Ignatov
attribute NC_GLOBAL creator_type String person
attribute NC_GLOBAL creator_url String (external link)
attribute NC_GLOBAL date_created String 2022-09-03T06:02:56Z
attribute NC_GLOBAL day_or_night String both
attribute NC_GLOBAL Easternmost_Easting double 179.99
attribute NC_GLOBAL gds_version_id String 02.0
attribute NC_GLOBAL geospatial_lat_max double 89.99
attribute NC_GLOBAL geospatial_lat_min double -89.99
attribute NC_GLOBAL geospatial_lat_resolution double 0.02
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.99
attribute NC_GLOBAL geospatial_lon_min double -179.99
attribute NC_GLOBAL geospatial_lon_resolution double 0.02
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL grid_mapping_horizontal_datum_name String World Geodetic System 1984
attribute NC_GLOBAL grid_mapping_long_name String coordinate reference system
attribute NC_GLOBAL grid_mapping_name String latitude_longitude
attribute NC_GLOBAL grid_mapping_prime_meridian_name String Greenwich
attribute NC_GLOBAL grid_mapping_reference_ellipsoid_name String WGS84
attribute NC_GLOBAL history String Created by the L2-to-L3 conversion tool, which was developed and provided by NOAA/NESDIS/STAR and CCNY. The version is 4.6.9
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String NOAA/NESDIS/STAR
attribute NC_GLOBAL keywords String angle, area, atmosphere, atmospheric, available, bias, binary, contribution, count, cryosphere, data, deviation, difference, distribution, dt_analysis, dtime, earth, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, Earth Science > Oceans > Sea Ice > Ice Extent, environmental, equal, error, estimate, extent, flags, fraction, front, gradient, highest, ice, ice distribution, indicator, information, input, l2p, l2p_flags, l3s, l3s-leo-pm, l3s_flags, l3u, leo, level, magnitude, major, measurement_dtime, national, nesdis, noaa, ocean, oceans, office, pixel, pixels, position, produced, quality, quality_level, reference, retrievals, satellite, satellite_zenith_angle, science, sea, sea_ice_area_fraction, sea_ice_fraction, sea_surface_subskin_temperature, sea_surface_temperature, sensor, service, single, skin, source, speed, sses, sses_bias, sses_standard_deviation, sst, sst_count, sst_dtime, sst_front_position, sst_gradient_magnitude, sst_source, standard, star, statistics, sub, sub-skin, subskin, surface, temperature, time, value, weight, weighted, where, wind, wind_speed, winds, zenith
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String GHRSST protocol describes data use as free and open
attribute NC_GLOBAL metadata_link String TBD
attribute NC_GLOBAL naming_authority String org.ghrsst
attribute NC_GLOBAL Northernmost_Northing double 89.99
attribute NC_GLOBAL preprocessor_version String 1.17.0
attribute NC_GLOBAL processing_level String L3S
attribute NC_GLOBAL product_version String L2 algorithm V2.80; L3 algorithm V4.6.9
attribute NC_GLOBAL project String Group for High Resolution Sea Surface Temperature
attribute NC_GLOBAL publisher_email String ghrsst-po at
attribute NC_GLOBAL publisher_name String The GHRSST Project Office
attribute NC_GLOBAL publisher_type String group
attribute NC_GLOBAL publisher_url String (external link)
attribute NC_GLOBAL references String Data convention: GHRSST Data Specification (GDS) v2.0. Algorithms: ACSPO-VIIRS ATBD (NOAA/NESDIS/STAR)
attribute NC_GLOBAL row_count int 9000
attribute NC_GLOBAL row_start int 0
attribute NC_GLOBAL sensor String VIIRS,AVHRR
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -89.99
attribute NC_GLOBAL spatial_resolution String 0.02 deg
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v70
attribute NC_GLOBAL summary String Sea surface temperature retrievals produced by NOAA/NESDIS/STAR office
attribute NC_GLOBAL testOutOfDate String now-95days
attribute NC_GLOBAL time_coverage_end String 2022-10-30T12:00:00Z
attribute NC_GLOBAL time_coverage_start String 2012-02-01T12:00:00Z
attribute NC_GLOBAL title String Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal Fronts Reanalysis, 2012-present, Daily (L3S-LEO degrees C)
attribute NC_GLOBAL Westernmost_Easting double -179.99
dimension time   double nValues=3896, evenlySpaced=false, averageSpacing=1 day 0h 10m 43s
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.3280976E9, 1.6671312E9
attribute time axis String T
attribute time calendar String Gregorian
attribute time comment String seconds since 1981-01-01 00:00:00
attribute time coverage_content_type String coordinate
attribute time ioos_category String Time
attribute time long_name String reference time of sst file
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
dimension latitude   float nValues=9000, evenlySpaced=true, averageSpacing=-0.02
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range float -89.99, 89.99
attribute latitude axis String Y
attribute latitude comment String Latitudes for locating data
attribute latitude coverage_content_type String coordinate
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
attribute latitude valid_max float 90.0
attribute latitude valid_min float -90.0
dimension longitude   float nValues=18000, evenlySpaced=true, averageSpacing=0.02
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -179.99, 179.99
attribute longitude axis String X
attribute longitude comment String Longitude for locating data
attribute longitude coverage_content_type String coordinate
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
attribute longitude valid_max float 180.0
attribute longitude valid_min float -180.0
variable sea_surface_temperature   float time, latitude, longitude
attribute sea_surface_temperature _FillValue float -327.68
attribute sea_surface_temperature colorBarMaximum double 35.0
attribute sea_surface_temperature colorBarMinimum double 0.0
attribute sea_surface_temperature comment String SST obtained by regression with buoy measurements, sensitive to skin SST. Further information at (Petrenko et al., JGR, 2014; doi:10.1002/2013JD020637)
attribute sea_surface_temperature coverage_content_type String physicalMeasurement
attribute sea_surface_temperature ioos_category String Temperature
attribute sea_surface_temperature long_name String sea surface sub-skin temperature
attribute sea_surface_temperature source String NOAA
attribute sea_surface_temperature standard_name String sea_surface_subskin_temperature
attribute sea_surface_temperature units String degree_C
attribute sea_surface_temperature valid_max float 40.0
attribute sea_surface_temperature valid_min float -2.0
variable sses_bias   float time, latitude, longitude
attribute sses_bias _FillValue float -275.198
attribute sses_bias colorBarMaximum double 5.0
attribute sses_bias colorBarMinimum double 0.0
attribute sses_bias comment String Bias is derived against Piecewise Regression SST produced by local regressions with buoys. Subtracting sses_bias from sea_surface_temperature produces more accurate estimate of SST at the depth of buoys. Further information at (Petrenko et al., JTECH, 2016; doi:10.1175/JTECH-D-15-0166.1)
attribute sses_bias coverage_content_type String qualityInformation
attribute sses_bias ioos_category String Statistics
attribute sses_bias long_name String SSES bias estimate
attribute sses_bias units String degree_C
attribute sses_bias valid_max float -271.118
attribute sses_bias valid_min float -275.182
variable sses_standard_deviation   float time, latitude, longitude
attribute sses_standard_deviation _FillValue float -274.43
attribute sses_standard_deviation colorBarMaximum double 5.0
attribute sses_standard_deviation colorBarMinimum double 0.0
attribute sses_standard_deviation comment String Standard deviation of sea_surface_temperature from SST measured by drifting buoys. Further information at (Petrenko et al., JTECH, 2016; doi:10.1175/JTECH-D-15-0166.1)
attribute sses_standard_deviation coverage_content_type String qualityInformation
attribute sses_standard_deviation ioos_category String Statistics
attribute sses_standard_deviation long_name String SSES standard deviation
attribute sses_standard_deviation units String degree_C
attribute sses_standard_deviation valid_max float -271.88
attribute sses_standard_deviation valid_min float -274.42
variable l2p_flags   short time, latitude, longitude
attribute l2p_flags _FillValue short 32767
attribute l2p_flags colorBarMaximum double 0.0
attribute l2p_flags colorBarMinimum double -30000.0
attribute l2p_flags comment String L2P common flags in bits 1-3 and data provider flags (from ACSPO mask) in bits 9-16. For backwards compatibility with legacy reader software, the data provider flags (last 8 bits) contain redundant land and ice information that is also available in bits 2 and 3, respectively. Description of individual bits: bit01 (0=IR: 1=microwave); bit02 (0=not_land; 1=land (from land-sea mask)); bit03 (0=not_ice; 1=ice (from first-guess L4 SST)); bits04-08 (reserved,set to 0); bit09 (0=valid_radiance; 1=invalid_radiance); bit10 (0=nighttime; 1=daytime); bit11 (0=not_land; 1=land (identical to bit02)); bit12 (0=good quality data; 1=twilight_degradation (degraded quality data due to "twilight" region)); bit13 (0=not_sunglint; 1=sunglint); bit14 (0=not_ice; 1=ice (identical to bit03)); bit15 (0=sst; 1=SST_not_valid_or_degraded (not_valid or degraded SST w/QL<5)); bit16 (0=water (ocean, lake, river); 1=not_water (land, ice, invalid))
attribute l2p_flags coverage_content_type String qualityInformation
attribute l2p_flags flag_masks short 1, 2, 4, 256, 512, 1024, 2048, 4096, 8192, 16384, -32768
attribute l2p_flags flag_meanings String microwave land ice invalid_radiance daytime land twilight_degradation sunglint ice SST_not_valid_or_degraded not_water
attribute l2p_flags ioos_category String Quality
attribute l2p_flags long_name String L2P flags
attribute l2p_flags valid_max short 32767
attribute l2p_flags valid_min short -32768
variable l3s_flags   short time, latitude, longitude
attribute l3s_flags _FillValue short -32768
attribute l3s_flags colorBarMaximum double 10.0
attribute l3s_flags colorBarMinimum double 0.0
attribute l3s_flags comment String L3S-LEO data availability flags in bits 1-4 and bits 5-16 are reserved for future use. bit01 (0=L3S-LEO_PM_N unavailable: 1=L3S-LEO_PM_N available); bit02 (0=L3S-LEO_PM_D unavailable: 1=L3S-LEO_PM_D available); bit03 (0=L3S-LEO_AM_N unavailable: 1=L3S-LEO_AM_N available); bit04 (0=L3S-LEO_AM_D unavailable: 1=L3S-LEO_AM_D available)
attribute l3s_flags coverage_content_type String thematicClassification
attribute l3s_flags flag_masks byte 1, 2, 4, 8
attribute l3s_flags flag_meanings String LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D
attribute l3s_flags ioos_category String Quality
attribute l3s_flags long_name String L3S flags
attribute l3s_flags valid_max short 32767
attribute l3s_flags valid_min short -32767
variable sst_count   byte time, latitude, longitude
attribute sst_count _FillValue byte -128
attribute sst_count colorBarMaximum double 100.0
attribute sst_count colorBarMinimum double 0.0
attribute sst_count comment String Number of L3U pixels contributing to L3S pixel
attribute sst_count coverage_content_type String referenceInformation
attribute sst_count ioos_category String Statistics
attribute sst_count long_name String Count of input L3U SST pixels
attribute sst_count valid_max byte 127
attribute sst_count valid_min byte 0
variable quality_level   byte time, latitude, longitude
attribute quality_level _FillValue byte -128
attribute quality_level colorBarMaximum double 6.0
attribute quality_level colorBarMinimum double 0.0
attribute quality_level comment String SST quality levels: 5 corresponds to “clear-sky” pixels and is recommended for operational applications and validation.
attribute quality_level coverage_content_type String qualityInformation
attribute quality_level flag_meanings String no_data bad_data not_used not_used not_used best_quality
attribute quality_level flag_values short 0, 1, 2, 3, 4, 5
attribute quality_level ioos_category String Quality
attribute quality_level long_name String quality level of SST pixel
attribute quality_level valid_max byte 5
attribute quality_level valid_min byte 0
variable sst_source   byte time, latitude, longitude
attribute sst_source _FillValue byte -128
attribute sst_source colorBarMaximum double 4.0
attribute sst_source colorBarMinimum double 0.0
attribute sst_source comment String Major contributor to SST. The major contributor is defined as the L3S-LEO product with highest weighed l3s-daily observation.
attribute sst_source coverage_content_type String qualityInformation
attribute sst_source flag_meanings String LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D
attribute sst_source flag_values byte 0, 1, 2, 3
attribute sst_source ioos_category String Temperature
attribute sst_source long_name String Source of major (highest weight) contribution to sst
attribute sst_source valid_max byte 3
attribute sst_source valid_min byte 0
variable satellite_zenith_angle   float time, latitude, longitude
attribute satellite_zenith_angle _FillValue float -327.68
attribute satellite_zenith_angle colorBarMaximum double 90.0
attribute satellite_zenith_angle colorBarMinimum double -90.0
attribute satellite_zenith_angle comment String Satellite zenith angle corresponding to L3S-LEO SST measurement with highest weight.
attribute satellite_zenith_angle coverage_content_type String referenceInformation
attribute satellite_zenith_angle height String 10 m
attribute satellite_zenith_angle ioos_category String Unknown
attribute satellite_zenith_angle long_name String satellite zenith angle
attribute satellite_zenith_angle units String degrees
attribute satellite_zenith_angle valid_max float 327.67
attribute satellite_zenith_angle valid_min float -327.67
variable dt_analysis   float time, latitude, longitude
attribute dt_analysis _FillValue float -327.68
attribute dt_analysis colorBarMaximum double 5.0
attribute dt_analysis colorBarMinimum double -5.0
attribute dt_analysis comment String Deviation from reference SST, i.e., dt_analysis = SST - reference SST
attribute dt_analysis coverage_content_type String qualityInformation
attribute dt_analysis ioos_category String Statistics
attribute dt_analysis long_name String deviation from SST reference
attribute dt_analysis source String
attribute dt_analysis units String kelvin
attribute dt_analysis valid_max float 327.67
attribute dt_analysis valid_min float -327.67
variable sea_ice_fraction   float time, latitude, longitude
attribute sea_ice_fraction _FillValue float -1.28
attribute sea_ice_fraction colorBarMaximum double 1.0
attribute sea_ice_fraction colorBarMinimum double 0.0
attribute sea_ice_fraction comment String Fractional sea ice cover
attribute sea_ice_fraction coverage_content_type String qualityInformation
attribute sea_ice_fraction ioos_category String Ice Distribution
attribute sea_ice_fraction long_name String sea ice fraction
attribute sea_ice_fraction source String
attribute sea_ice_fraction standard_name String sea_ice_area_fraction
attribute sea_ice_fraction units String 1
attribute sea_ice_fraction valid_max float 1.0
attribute sea_ice_fraction valid_min float 0.0
variable wind_speed   float time, latitude, longitude
attribute wind_speed _FillValue float -0.15
attribute wind_speed colorBarMaximum double 15.0
attribute wind_speed colorBarMinimum double 0.0
attribute wind_speed comment String Typically represents surface winds (10 meters above the sea surface). The wind speeds reported here are a daily mean value.
attribute wind_speed coverage_content_type String auxiliaryInformation
attribute wind_speed height String 10 m
attribute wind_speed ioos_category String Wind
attribute wind_speed long_name String wind speed
attribute wind_speed source String MERRA2 tavg1_2d_ocn_Nx: 2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Ocean Surface Diagnostics
attribute wind_speed standard_name String wind_speed
attribute wind_speed units String m s-1
attribute wind_speed valid_max float 38.1
attribute wind_speed valid_min float 0.0
variable sst_dtime   float time, latitude, longitude
attribute sst_dtime _FillValue float -5.3687091E8
attribute sst_dtime colorBarMaximum double 10.0
attribute sst_dtime colorBarMinimum double -10.0
attribute sst_dtime comment String time plus sst_dtime gives seconds since 1981-01-01 00:00:00 UTC
attribute sst_dtime coverage_content_type String referenceInformation
attribute sst_dtime ioos_category String Temperature
attribute sst_dtime long_name String time difference from reference time
attribute sst_dtime units String seconds
attribute sst_dtime valid_max float 5.3687091E8
attribute sst_dtime valid_min float -5.3687091E8
variable measurement_dtime   float time, latitude, longitude
attribute measurement_dtime _FillValue float -5.3687091E8
attribute measurement_dtime colorBarMaximum double 10.0
attribute measurement_dtime colorBarMinimum double -10.0
attribute measurement_dtime comment String time plus measurement_dtime gives seconds since 1981-01-01 00:00:00 UTC
attribute measurement_dtime coverage_content_type String referenceInformation
attribute measurement_dtime ioos_category String Temperature
attribute measurement_dtime long_name String time difference of highest weighted input SST from reference time. Is equal to sst_dtime for pixels where L3S-LEO-PM_N is available
attribute measurement_dtime units String seconds
attribute measurement_dtime valid_max float 5.3687091E8
attribute measurement_dtime valid_min float -5.3687091E8
variable sst_gradient_magnitude   float time, latitude, longitude
attribute sst_gradient_magnitude _FillValue float -32.768
attribute sst_gradient_magnitude colorBarMaximum double 40.0
attribute sst_gradient_magnitude colorBarMinimum double -40.0
attribute sst_gradient_magnitude comment String Gradient magnitude calculated from SST field in all grids with valid SST
attribute sst_gradient_magnitude coverage_content_type String physicalMeasurement
attribute sst_gradient_magnitude ioos_category String Temperature
attribute sst_gradient_magnitude long_name String SST gradient magnitude value
attribute sst_gradient_magnitude units String kelvin/km
attribute sst_gradient_magnitude valid_max float 32.767
attribute sst_gradient_magnitude valid_min float -32.767
variable sst_front_position   byte time, latitude, longitude
attribute sst_front_position _FillValue byte -128
attribute sst_front_position colorBarMaximum double 1.5
attribute sst_front_position colorBarMinimum double 0.0
attribute sst_front_position comment String Binary indicator of SST front position in the valid SST clear-sky domain: 1 - SST front present, 0 - no front present
attribute sst_front_position coverage_content_type String image
attribute sst_front_position ioos_category String Temperature
attribute sst_front_position long_name String Binary SST front position indicator
attribute sst_front_position valid_max byte 1
attribute sst_front_position valid_min byte 0

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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