ERDDAP at NOAA CoastWatch
Easier access to scientific data |
NOAA CoastWatch Central Operations |
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) |
Institution: | NOAA/NESDIS/STAR (Dataset ID: noaacwLEOACSPOSSTL3SnrtKDaily) |
Information: | Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph |
Attributes { time { String _CoordinateAxisType "Time"; Float64 actual_range 1.7016912e+9, 1.7328816e+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 "20241129120000-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 "20241129120000-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 2024-12-02T23:43:59Z (local files) 2024-12-02T23:43:59Z https://coastwatch.noaa.gov/erddap/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 "2024-11-29T12:00:00Z"; String time_coverage_start "2023-12-04T12:00:00Z"; 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; } }
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.