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Dataset Title:  Chlorophyll (Gap-filled DINEOF), NOAA S-NPP NOAA-20 VIIRS and Copernicus S-3A
OLCI, Science Quality, Global 9km, 2018-
recent, Daily
  RSS
Institution:  NOAA NESDIS STAR   (Dataset ID: noaacwNPPN20S3ASCIDINEOFDaily)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      1632    1 day (even)
  < slider >
 altitude (m) ?      1    (just one value)
  < slider >
 latitude (degrees_north) ?      2160    -0.08333334 (even)
  < slider >
 longitude (degrees_east) ?      4320    0.08333332 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 chlor_a (Chlorophyll Concentration, DINEOF Gap-Filled, mg m^-3) ?

File type: (more info)

(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 1.5181776e+9, 1.659096e+9;
    String axis "T";
    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";
    Float32 actual_range -89.95834, 89.95834;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "lat";
    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 -179.9583, 179.9583;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "lon";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  chlor_a {
    Float32 _FillValue -999.0;
    String C_format "%.4g";
    String cell_methods "time:mean(interval:1 day)";
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Ocean Color";
    String long_name "Chlorophyll Concentration, DINEOF Gap-Filled";
    String references "O\\'Reilly J. E. et al. (1998), Ocean color chlorophyll algorithms for SeaWiFS, J. Geophys. Res., 103(C11), 2493724953";
    String standard_name "mass_concentration_of_chlorophyll_a_in_sea_water";
    String units "mg m^-3";
    Float32 valid_max 100.0;
    Float32 valid_min 0.001;
  }
  NC_GLOBAL {
    String _lastModified "2022-08-08T20:15:07.000Z";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6 ACDD-1.3, COARDS";
    String creator_email "coastwatch.info@noaa.gov";
    String creator_name "NOAA CoastWatch";
    String creator_type "institution";
    String creator_url "https://coastwatch.noaa.gov";
    String date_created "2022-08-08T20:15:07.000Z";
    Float64 Easternmost_Easting 179.9583;
    Float64 geospatial_lat_max 89.95834;
    Float64 geospatial_lat_min -89.95834;
    Float64 geospatial_lat_resolution 0.08333333950903196;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9583;
    Float64 geospatial_lon_min -179.9583;
    Float64 geospatial_lon_resolution 0.0833333178976615;
    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 grid_mapping_epsg_code "EPSG:4326";
    Float32 grid_mapping_inverse_flattening 298.2572;
    Float32 grid_mapping_longitude_of_prime_meridian 0.0;
    String grid_mapping_name "latitude_longitude";
    String grid_mapping_proj4_params "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
    Float32 grid_mapping_semi_major_axis 6378137.0;
    String history 
"/data/data369/hgu/ocssw/bin/l3mapgen par=/data/data369/hgu/v224/bin/../config/l3mapgen_par_dineof_chlor_a ifile=/data/data369/hgu/v224/bin/../temp/Config_dineof3_chlor_a/V2022210_oci_L3.nc ofile=/data/data369/viirs/L3_dineof/210/B2022210_A1_WW00_chlor_a.nc   Mon Aug  8 20:15:11 2022
: /data/data369/hgu/v224/bin/l3cnvtr -b -s Suomi-NPP,NOAA-20,Sentinel-3A /data/data369/viirs/L3_dineof/210/B2022210_A1_WW00_chlor_a.nc /data/aftp/socd1/mecb/coastwatch/viirs/science/L3/global/chlora/dineof3/2022/B2022210_A1_WW00_chlora.nc
2022-08-09T13:22:15Z (local files)
2022-08-09T13:22:15Z https://coastwatch.noaa.gov//erddap/griddap/noaacwNPPN20S3ASCIDINEOFDaily.das";
    String id "L3//data/data540/DINEOF/EOF-viirs-olci/reconstructed_mix_nsw/V2022210_oci_L3.nc";
    String infoUrl "https://coastwatch.noaa.gov";
    String institution "NOAA NESDIS STAR";
    String instrument "VIIRS, OLCI";
    String keywords "altitude, chemistry, chlor_a, chlorophyll, color, concentration, data, dineof, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, environmental, filled, gap, gap-filled, information, L4, mass, mass_concentration_of_chlorophyll_a_in_sea_water, national, nesdis, noaa, ocean, ocean color, oceans, satellite, science, sea, seawater, service, star, time, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String l2_flag_names "ATMFAIL,LAND,HIGLINT,HILT,HISATZEN,CLOUD,HISOLZEN,LOWLW,CHLFAIL,NAVWARN,CLDSHDSTL,MAXAERITER,CHLWARN,ALGICE,SEAICE,NAVFAIL,FILTER";
    String license "These data may be redistributed and used without restriction.";
    String map_projection "geographic";
    String measure "Mean";
    String naming_authority "gov.noaa.coastwatch";
    Float64 Northernmost_Northing 89.95834;
    String platform "Suomi-NPP, NOAA-20, Sentinel-3A";
    String processing_level "L3 Mapped";
    String product_name "B2022210_A1_WW00_chlora.nc";
    String proj4_string "+proj=eqc +lat_ts=0 +lat_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs +lon_0=0.000000";
    String project "Ocean Color Science Team (NOAA/NESDIS/STAR/OCST)";
    String publisher_email "coastwatch.info@noaa.gov;ncei.info@noaa.gov";
    String publisher_name "NOAA CoastWatch;National Centers for Environmental Information (NCEI)";
    String publisher_type "group";
    String publisher_url "https://coastwatch.noaa.gov;https://www.ncei.noaa.gov/";
    String Satellite 
"Suomi-NPP
 NOAA-20, Sentinel-3A";
    String Sensor "VIIRS, OLCI";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.95834;
    String spatialResolution "9.28 km";
    String standard_name_vocabulary "CF Standard Name Table v36";
    String summary "DINEOF gap filled L4 data. NOAA National Environmental Satellite, Data, and Information Service (NESDIS) STAR data from a local source.";
    String temporal_range "daily";
    String testOutOfDate "now-23days";
    String time_coverage_end "2022-07-29T12:00:00Z";
    String time_coverage_start "2018-02-09T12:00:00Z";
    String title 
"Chlorophyll (Gap-filled DINEOF), NOAA S-NPP NOAA-20 VIIRS and Copernicus S-3A OLCI, Science Quality, Global 9km, 2018-
recent, Daily";
    Float64 Westernmost_Easting -179.9583;
  }
}

 

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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