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Dataset Title:  Ice Surface Temperature, NOAA-20 VIIRS, Near Real-Time, Sector XW, Daily 4-day
Composite
  RSS
Institution:  NOAA NESDIS CoastWatch   (Dataset ID: noaacwVIIRSn20icesrftempXW00Daily4Day)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      1269    1 day 0h 5m 41s (uneven)
  < slider >
 altitude (m) ?      1    (just one value)
  < slider >
 latitude (degrees_north) ?      6000    -0.0075 (even)
  < slider >
 longitude (degrees_east) ?      8010    0.0075 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables) 
 IceSrfTemp (Ice Surface Temp, Kelvin(K)) ?

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 1.618272e+9, 1.7282592e+9;
    String axis "T";
    String bounds "baseline_bounds";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time";
    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 -89.77125, -44.77875;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -0.03374999999997996, 60.033750000000026;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  IceSrfTemp {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 290.0;
    Float64 colorBarMinimum 240.0;
    String grid_mapping "coord_ref";
    String ioos_category "Temperature";
    String long_name "Ice Surface Temp";
    Float32 missing_value -999.0;
    String units "Kelvin(K)";
    Float32 valid_max 390.0;
    Float32 valid_min 100.0;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "coastwatch.info@noaa.gov";
    String creator_name "NOAA/NESDIS/STAR/SOCD/CoastWatch";
    String creator_url "https://coastwatch.noaa.gov";
    String date_created "2024-10-12T06:47:50Z";
    String defaultGraphQuery "IceSrfTemp[(last)]%26.draw=surface%26.vars=longitude%7Clatitude%7CIceConc%26.colorBar=KT_ice%7C%7C%7C0%7C100%7C%26.land=over%26.bgColor=0xffccccff";
    Float64 Easternmost_Easting 60.033750000000026;
    Int32 end_orbit_number 35704;
    String geospatial_bounds "POLYGON((-0.03375 -44.77875,14.983125 -44.77875,30.0 -44.77875,45.016875 -44.77875,60.03375 -44.77875,60.03375 -56.026875,60.03375 -67.275,60.03375 -78.523125,60.03375 -89.77125,45.016875 -89.77125,30.0 -89.77125,14.983125 -89.77125,-0.03375 -89.77125,-0.03375 -78.523125,-0.03375 -67.275,-0.03375 -56.026875,-0.03375 -44.77875))";
    Float64 geospatial_lat_max -44.77875;
    Float64 geospatial_lat_min -89.77125;
    Float64 geospatial_lat_resolution 0.007499999999999999;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 60.033750000000026;
    Float64 geospatial_lon_min -0.03374999999997996;
    Float64 geospatial_lon_resolution 0.0075000000000000015;
    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";
    String history 
"[cwutils 4.0.1.7 20240513_133416] cwcomposite --pedantic --method latest --inputs - --match ^(IceSrfTemp)$ /home/pub/svc_cwatch/aps/aps_x/browse/lvl4/modis/coastwatch/maskhdf/VX1CCW_C2024279_C2024282_H4_XW00_edgemask_IceSrfTemp.hdf
[cwutils 4.0.1.7 20240513_133416] cwgraphics /home/pub/svc_cwatch/aps/aps_x/browse/lvl4/modis/coastwatch/maskhdf/VX1CCW_C2024279_C2024282_H4_XW00_edgemask_IceSrfTemp.hdf
2024-10-13T14:36:42Z (local files)
2024-10-13T14:36:42Z https://coastwatch.noaa.gov/erddap/griddap/noaacwVIIRSn20icesrftempXW00Daily4Day.das";
    String identifier_product_doi_authority "https://dx.doi.org";
    String infoUrl "https://coastwatch.noaa.gov";
    String institution "NOAA NESDIS CoastWatch";
    String instrument "VIIRS";
    String keywords "Earth Science > Cryosphere > Sea Ice > Ice Temperature";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/ 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 "gov.noaa.coastwatch";
    Float64 Northernmost_Northing -44.77875;
    String OBSERVED_PROPERTY "IceSrfTemp";
    String platform "NOAA-20";
    String source "NOAA-20_VIIRS_IceSrfTemp";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.77125;
    String standard_name_vocabulary "CF Standard Name Table v29";
    Int32 start_orbit_number 35649;
    String summary "Enterprise Ice Concentration/ Ice Mask/ Ice Surface Temperature Products";
    String testOutOfDate "now-2days";
    String time_coverage_end "2024-10-07T00:00:00Z";
    String time_coverage_start "2021-04-13T00:00:00Z";
    String title "Ice Surface Temperature, NOAA-20 VIIRS, Near Real-Time, Sector XW, Daily 4-day Composite";
    Float64 Westernmost_Easting -0.03374999999997996;
  }
}

 

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.

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.


 

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