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ERDDAP at NOAA CoastWatch
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NOAA CoastWatch Central Operations |
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| Dataset Title: | Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal Fronts, Near Real-time, Daily (L3S-LEO Kelvin) 
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| Institution: | NOAA/NESDIS/STAR (Dataset ID: noaacwLEOACSPOSSTL3SnrtKDaily) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Data Access Form
| Files
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Zoom: ![[The graph you specified. Please be patient.]](https://coastwatch.noaa.gov/erddap/griddap/noaacwLEOACSPOSSTL3SnrtKDaily.png?sea_surface_temperature%5B(2024-09-06T12:00:00Z)%5D%5B(89.99):(-89.99)%5D%5B(-179.99):(179.99)%5D&.draw=surface&.vars=longitude%7Clatitude%7Csea_surface_temperature&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff)
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Attributes {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.6973712e+9, 1.7287344e+9;
String axis "T";
String calendar "Gregorian";
String comment "seconds since 1981-01-01 00:00:00";
String coverage_content_type "coordinate";
String ioos_category "Time";
String long_name "reference time of sst file";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range -89.99, 89.99;
String axis "Y";
String comment "Latitudes for locating data";
String coverage_content_type "coordinate";
String ioos_category "Location";
String long_name "Latitude";
String standard_name "latitude";
String units "degrees_north";
Float32 valid_max 90.0;
Float32 valid_min -90.0;
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range -179.99, 179.99;
String axis "X";
String comment "Longitude for locating data";
String coverage_content_type "coordinate";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
Float32 valid_max 180.0;
Float32 valid_min -180.0;
}
sea_surface_temperature {
Float32 _FillValue -54.53;
Float64 colorBarMaximum 305.0;
Float64 colorBarMinimum 271.0;
String comment "SST obtained by regression with buoy measurements, sensitive to skin SST. Further information at (Petrenko et al., JGR, 2014; doi:10.1002/2013JD020637)";
String coverage_content_type "physicalMeasurement";
String ioos_category "Temperature";
String long_name "sea surface sub-skin temperature";
String source "NOAA";
String standard_name "sea_surface_subskin_temperature";
String units "kelvin";
Float32 valid_max 600.82;
Float32 valid_min -54.52;
}
sses_bias {
Float32 _FillValue -1.28;
Float64 colorBarMaximum 5.0;
Float64 colorBarMinimum 0.0;
String comment "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)";
String coverage_content_type "qualityInformation";
String ioos_category "Statistics";
String long_name "SSES bias estimate";
String units "kelvin";
Float32 valid_max 1.27;
Float32 valid_min -1.27;
}
sses_standard_deviation {
Float32 _FillValue -0.28;
Float64 colorBarMaximum 5.0;
Float64 colorBarMinimum 0.0;
String comment "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)";
String coverage_content_type "qualityInformation";
String ioos_category "Statistics";
String long_name "SSES standard deviation";
String units "kelvin";
Float32 valid_max 2.27;
Float32 valid_min -0.27;
}
l2p_flags {
Int16 _FillValue 32767;
Float64 colorBarMaximum 0.0;
Float64 colorBarMinimum -30000.0;
String comment "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))";
String coverage_content_type "qualityInformation";
Int16 flag_masks 1, 2, 4, 256, 512, 1024, 2048, 4096, 8192, 16384, -32768;
String flag_meanings "microwave land ice invalid_radiance daytime land twilight_degradation sunglint ice SST_not_valid_or_degraded not_water";
String ioos_category "Quality";
String long_name "L2P flags";
Int16 valid_max 32767;
Int16 valid_min -32768;
}
l3s_flags {
Int16 _FillValue -32768;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "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)";
String coverage_content_type "thematicClassification";
Byte flag_masks 1, 2, 4, 8;
String flag_meanings "LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D";
String ioos_category "Quality";
String long_name "L3S flags";
Int16 valid_max 32767;
Int16 valid_min -32767;
}
sst_count {
Byte _FillValue -128;
String _Unsigned "false";
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String comment "Number of L3U pixels contributing to L3S pixel";
String coverage_content_type "referenceInformation";
String ioos_category "Statistics";
String long_name "Count of input L3U SST pixels";
Byte valid_max 127;
Byte valid_min 0;
}
quality_level {
Byte _FillValue -128;
String _Unsigned "false";
Float64 colorBarMaximum 6.0;
Float64 colorBarMinimum 0.0;
String comment "SST quality levels: 5 corresponds to “clear-sky” pixels and is recommended for operational applications and validation.";
String coverage_content_type "qualityInformation";
String flag_meanings "no_data bad_data not_used not_used not_used best_quality";
Int16 flag_values 0, 1, 2, 3, 4, 5;
String ioos_category "Quality";
String long_name "quality level of SST pixel";
Byte valid_max 5;
Byte valid_min 0;
}
sst_source {
Byte _FillValue -128;
String _Unsigned "false";
Float64 colorBarMaximum 4.0;
Float64 colorBarMinimum 0.0;
String comment "Major contributor to SST. The major contributor is defined as the L3S-LEO product with highest weighed l3s-daily observation.";
String coverage_content_type "qualityInformation";
String flag_meanings "LEO_PM_N LEO_PM_D LEO_AM_N LEO_AM_D";
Byte flag_values 0, 1, 2, 3;
String ioos_category "Temperature";
String long_name "Source of major (highest weight) contribution to sst";
Byte valid_max 3;
Byte valid_min 0;
}
satellite_zenith_angle {
Float32 _FillValue -327.68;
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String comment "Satellite zenith angle corresponding to L3S-LEO SST measurement with highest weight.";
String coverage_content_type "referenceInformation";
String height "10 m";
String ioos_category "Unknown";
String long_name "satellite zenith angle";
String units "degrees";
Float32 valid_max 327.67;
Float32 valid_min -327.67;
}
dt_analysis {
Float32 _FillValue -327.68;
Float64 colorBarMaximum 5.0;
Float64 colorBarMinimum -5.0;
String comment "Deviation from reference SST, i.e., dt_analysis = SST - reference SST";
String coverage_content_type "qualityInformation";
String ioos_category "Statistics";
String long_name "deviation from SST reference";
String source "20241011120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc";
String units "kelvin";
Float32 valid_max 327.67;
Float32 valid_min -327.67;
}
sea_ice_fraction {
Float32 _FillValue -1.28;
Float64 colorBarMaximum 1.0;
Float64 colorBarMinimum 0.0;
String comment "Fractional sea ice cover";
String coverage_content_type "qualityInformation";
String ioos_category "Ice Distribution";
String long_name "sea ice fraction";
String source "20241011120000-CMC-L4_GHRSST-SSTfnd-CMC0.1deg-GLOB-v02.0-fv03.0.nc";
String standard_name "sea_ice_area_fraction";
String units "1";
Float32 valid_max 1.0;
Float32 valid_min 0.0;
}
wind_speed {
Float32 _FillValue -0.15;
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum 0.0;
String comment "Typically represents surface winds (10 meters above the sea surface). The wind speeds reported here are a daily mean value.";
String coverage_content_type "auxiliaryInformation";
String height "10 m";
String ioos_category "Wind";
String long_name "wind speed";
String source "GFS forecast";
String standard_name "wind_speed";
String units "m s-1";
Float32 valid_max 38.1;
Float32 valid_min 0.0;
}
sst_dtime {
Float32 _FillValue -5.368709e+8;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String comment "time plus sst_dtime gives seconds since 1981-01-01 00:00:00 UTC";
String coverage_content_type "referenceInformation";
String ioos_category "Temperature";
String long_name "time difference from reference time";
String units "seconds";
Float32 valid_max 5.368709e+8;
Float32 valid_min -5.368709e+8;
}
measurement_dtime {
Float32 _FillValue -5.368709e+8;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String comment "time plus measurement_dtime gives seconds since 1981-01-01 00:00:00 UTC";
String coverage_content_type "referenceInformation";
String ioos_category "Temperature";
String long_name "time difference of highest weighted input SST from reference time. Is equal to sst_dtime for pixels where L3S-LEO-PM_N is available";
String units "seconds";
Float32 valid_max 5.368709e+8;
Float32 valid_min -5.368709e+8;
}
sst_gradient_magnitude {
Float32 _FillValue -32.768;
Float64 colorBarMaximum 40.0;
Float64 colorBarMinimum -40.0;
String comment "Gradient magnitude calculated from SST field in all grids with valid SST";
String ioos_category "Temperature";
String long_name "SST gradient magnitude value";
String units "kelvin/km";
Float32 valid_max 32.767;
Float32 valid_min -32.767;
}
sst_front_position {
Byte _FillValue -128;
String _Unsigned "false";
Float64 colorBarMaximum 1.5;
Float64 colorBarMinimum 0.0;
String comment "Binary indicator of SST front position in the valid SST clear-sky domain: 1 - SST front present, 0 - no front present";
String ioos_category "Temperature";
String long_name "Binary SST front position indicator";
Byte valid_max 1;
Byte valid_min 0;
}
NC_GLOBAL {
String acknowledgement "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).";
String aggregator_version "V1.00";
String cdm_data_type "Grid";
Int32 col_count 18000;
Int32 col_start 0;
String collation_version "2.11.0";
String comment "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.";
String Conventions "CF-1.7, ACDD-1.3, COARDS";
String creator_email "Alex.Ignatov@noaa.gov";
String creator_name "Alex Ignatov";
String creator_type "person";
String creator_url "http://www.star.nesdis.noaa.gov";
String date_created "2022-09-03T06:02:56Z";
String day_or_night "both";
Float64 Easternmost_Easting 179.99;
String gds_version_id "02.0";
Float64 geospatial_lat_max 89.99;
Float64 geospatial_lat_min -89.99;
Float64 geospatial_lat_resolution 0.02;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 179.99;
Float64 geospatial_lon_min -179.99;
Float64 geospatial_lon_resolution 0.02;
String geospatial_lon_units "degrees_east";
String grid_mapping_horizontal_datum_name "World Geodetic System 1984";
String grid_mapping_long_name "coordinate reference system";
String grid_mapping_name "latitude_longitude";
String grid_mapping_prime_meridian_name "Greenwich";
String grid_mapping_reference_ellipsoid_name "WGS84";
String history
"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
2024-10-14T07:35:25Z (local files)
2024-10-14T07:35:25Z https://coastwatch.noaa.gov/griddap/noaacwLEOACSPOSSTL3SnrtKDaily.das";
String id "L3S_LEO_DY-STAR-v2.81";
String infoUrl "http://www.star.nesdis.noaa.gov";
String institution "NOAA/NESDIS/STAR";
String instrument "AVHRR,VIIRS";
String keywords "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";
String keywords_vocabulary "GCMD Science Keywords";
String license "GHRSST protocol describes data use as free and open";
String metadata_link "https://cmr.earthdata.nasa.gov/search/concepts/C2805339147-POCLOUD";
String naming_authority "org.ghrsst";
Float64 Northernmost_Northing 89.99;
String platform "MetOp-B,MetOp-C,N20,N21,NPP";
String preprocessor_version "1.17.0";
String processing_level "L3S";
String product_version "L2 algorithm V2.80; L3 algorithm V4.6.9";
String project "Group for High Resolution Sea Surface Temperature";
String publisher_email "ghrsst-po@nceo.ac.uk";
String publisher_name "The GHRSST Project Office";
String publisher_type "group";
String publisher_url "https://www.ghrsst.org";
String references "Data convention: GHRSST Data Specification (GDS) v2.0. Algorithms: ACSPO-VIIRS ATBD (NOAA/NESDIS/STAR)";
Int32 row_count 9000;
Int32 row_start 0;
String sensor "AVHRR,VIIRS";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -89.99;
String spatial_resolution "0.02 deg";
String standard_name_vocabulary "CF Standard Name Table v70";
String summary "Sea surface temperature retrievals produced by NOAA/NESDIS/STAR office";
String testOutOfDate "now-95days";
String time_coverage_end "2024-10-12T12:00:00Z";
String time_coverage_start "2023-10-15T12:00:00Z";
String title "Sea-Surface Temperature, NOAA ACSPO Daily Global 0.02° Gridded Super-collated SST and Thermal Fronts, Near Real-time, Daily (L3S-LEO Kelvin)";
Float64 Westernmost_Easting -179.99;
}
}
Data Access Protocol (DAP) and its
projection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst),
followed by [(start):stride:(stop)]
(or a shorter variation of that) for each of the variable's dimensions
(for example, [time][latitude][longitude]).
For details, see the griddap Documentation.