Data Access Form

Dataset Title:	Sea-Surface Temperature, NOAA ACSPO S-NPP VIIRS CoastWatch Co-gridded 4km Daily (degrees C)
Institution:	NOAA/NESDIS/OSPO (Dataset ID: nesdisL3CollatednppC)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (Centered Time, UTC)	1493	1 day 0h 56m 57s (uneven)

altitude (m)	1	(just one value)

latitude (degrees_north)	4788	-0.0375 (even)

longitude (degrees_east)	9600	0.0375 (even)

Grid Variables (which always also download all of the dimension variables)

sea_surface_temperature (degree_C)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5790896e+9, 1.713096e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Centered Time";
    String source_name "time_baseline";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.75625000000002, 89.75625000000001;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "rows";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -179.98125000000002, 179.98124999999996;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "cols";
    String standard_name "longitude";
    String units "degrees_east";
  }
  sea_surface_temperature {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String cw_atmospheric_correction "Advanced Clear-Sky Processor for Oceans (ACSPO)-VIIRS";
    Int32 cw_fraction_digits 14;
    String ioos_category "Temperature";
    String long_name "sea surface sub-skin temperature";
    Float32 missing_value NaN;
    String source "NOAA";
    String standard_name "sea_surface_subskin_temperature";
    String units "degree_C";
    Float32 valid_max 327.67;
    Float32 valid_min -2.0000062;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "veronica.lance@noaa.gov";
    String creator_name "Veronica Lance";
    String creator_type "person";
    String creator_url "http://www.star.nesdis.noaa.gov";
    String cw_pass_type "day/night";
    String cw_projection "Geographic";
    String cw_satellite "NPP";
    String cw_sensor "VIIRS";
    String cw_software_name "ACSPO";
    String cw_software_version "2.80";
    Int32 cw_swath_sync_lines 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1;
    String date_created "2022-12-06T09:53:17Z";
    Float64 Easternmost_Easting 179.98124999999996;
    Float64 geospatial_lat_max 89.75625000000001;
    Float64 geospatial_lat_min -89.75625000000002;
    Float64 geospatial_lat_resolution 0.03750000000000001;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.98124999999996;
    Float64 geospatial_lon_min -179.98125000000002;
    Float64 geospatial_lon_resolution 0.0375;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    Float64 grid_mapping_longitude_of_prime_meridian 0.0;
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String history 
"[cwutils 3.8.0.305 20230102_225324] cwcomposite --pedantic --method explicit --inputs - --match ^(l2p_flags|sses_standard_deviation|sses_bias|latitude|longitude|sea_surface_temperature)$ /home/pub/svc_cwatch/aps/aps_w/browse/lvl4/modis/coastwatch/hdf/VSSTNCW_B2024105_C26_003001_004001_021001_022000_035001_040000_053000_054000_071000_072000_085000_090001_103001_104001_121001_122000_135000_140000_154000_155001_173001_191001_205000_210000_223000_224000_UW00_mixed_seasurfacetemperature.hdf
[cwutils 3.8.0.305 20230102_225324] cwgraphics /home/pub/svc_cwatch/aps/aps_w/browse/lvl4/modis/coastwatch/hdf/VSSTNCW_B2024105_C26_003001_004001_021001_022000_035001_040000_053000_054000_071000_072000_085000_090001_103001_104001_121001_122000_135000_140000_154000_155001_173001_191001_205000_210000_223000_224000_UW00_mixed_seasurfacetemperature.hdf
[cwutils 3.8.0.305 20230102_225324] cwimport --match=^graphics$ --copy /home/pub/svc_cwatch/aps/aps/aps/share/coastwatch/icons/GlobalFourKmGeographic.hdf /home/pub/svc_cwatch/aps/aps_z/browse/lvl4/modis/coastwatch/maskhdf/VSSTNCW_B2024105_B2024105_D1_WW00_mixed_seasurfacetemperature.hdf
2024-04-20T15:31:45Z (local files)
2024-04-20T15:31:45Z https://polarwatch.noaa.gov/erddap/griddap/nesdisL3CollatednppC.das";
    String infoUrl "http://www.star.nesdis.noaa.gov";
    String institution "NOAA/NESDIS/OSPO";
    String instrument "VIIRS";
    String keywords "altitude, baseline, cols, data, earth, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, enviro                                      nmental, graphics, imager, imager/radiometer, imaging, information, infrared, mean, national, nesdis, noaa, npp, ocean, oceans, office, operations, optic                                      al, optical properties, orbiting, osdpd, ospo, overlay, partnership, planes, polar, polar-orbiting, product, properties, radiometer, rows, satellite, sci                                      ence, sea, sea_surface_subskin_temperature, sea_surface_temperature, seasurfacetemperature, service, sst, subskin, suite, surface, temperature, tim                                      e_baseline, time, viirs, visible";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String naming_authority "org.ghrsst";
    Float64 Northernmost_Northing 89.75625000000001;
    String OBSERVED_PROPERTY "sea_surface_temperature";
    String platform "S-NPP";
    String processing_level "L2P";
    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://coastwatch.noaa.gov";
    String source "S-NPP_VIIRS_seasurfacetemperature";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.75625000000002;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Sea surface temperature retrievals produced by NOAA/NESDIS/Office of Satellite and Product Operations (OSPO) office from Visi                                      ble and Infrared Imager/Radiometer Suite (VIIRS) sensor";
    String testOutOfDate "now-3days";
    String time_coverage_end "2024-04-14T12:00:00Z";
    String time_coverage_start "2020-01-15T12:00:00Z";
    String title "Sea-Surface Temperature, NOAA ACSPO S-NPP VIIRS CoastWatch Co-gridded 4km Daily (degrees C)";
    Float64 Westernmost_Easting -179.98125000000002;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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.