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ERDDAP
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Dataset Title: | Chlorophyll, Blended NOAA-SNPP and NOAA-20 VIIRS, Near Real-Time, Global, Level 3, 0.0375°, 2018-present EXPERIMENTAL, Daily ![]() ![]() |
Institution: | NOAA NESDIS STAR (Dataset ID: nesdisVHNnoaaSNPPnoaa20chlaDaily) |
Information: | Summary ![]() ![]() ![]() |
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Attributes { time { String _CoordinateAxisType "Time"; Float64 actual_range 1.533816e+9, 1.6563312e+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"; Float64 actual_range -89.75625, 89.75625; String axis "Y"; String ioos_category "Location"; String long_name "Latitude"; String standard_name "latitude"; String units "degrees_north"; Float64 valid_max 90.0; Float64 valid_min -90.0; } longitude { String _CoordinateAxisType "Lon"; Float64 actual_range -179.98125, 179.98125; String axis "X"; String ioos_category "Location"; String long_name "Longitude"; String standard_name "longitude"; String units "degrees_east"; Float64 valid_max 180.0; Float64 valid_min -180.0; } chl_oci { Float32 _FillValue -32767.0; String C_format "%.4g"; String cell_methods "time:mean"; 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, OCI Algorithm"; String references "Hu, C., Lee Z., and Franz, B.A. (2012). Chlorophyll-a algorithms for oligotrophic oceans: A novel approach based on three-band reflectance difference, J. Geophys. Res., 117, C01011, doi:10.1029/2011JC007395."; 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 "2022-06-27T19:01:05.000Z"; 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 CoastWatch"; String creator_type "institution"; String creator_url "https://coastwatch.noaa.gov"; String date_created "2022-06-27T19:01:05.000Z"; Float64 Easternmost_Easting 179.98125; Float64 geospatial_lat_max 89.75625; Float64 geospatial_lat_min -89.75625; Float64 geospatial_lat_resolution 0.0375; String geospatial_lat_units "degrees_north"; Float64 geospatial_lon_max 179.98125; Float64 geospatial_lon_min -179.98125; 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"; Float32 grid_mapping_inverse_flattening 298.2572; Float32 grid_mapping_longitude_of_prime_meridian 0.0; String grid_mapping_name "latitude_longitude"; Float32 grid_mapping_semi_major_axis 6378137.0; String history "/data/home004/hgu/docker_v224/bin/l3mapgen par=/data/home004/hgu/docker_v224/bin/../config/l3mapgen_par_chl_oci ifile=/data/home004/hgu/docker_v224/bin/../temp/Config_mixed/infile_iop_2km_G_chl_oci.nc ofile=/data/data369/viirs/L3/2022/06/26/V2022177_D1_NPP-N20_WW00_chl_oci.nc Mon Jun 27 19:01:11 2022 : /data/home004/hgu/docker_v224/bin/l3cnvtr -r 4 -s Suomi-NPP,NOAA-20 /data/data369/viirs/L3/2022/06/26/V2022177_D1_NPP-N20_WW00_chl_oci.nc /data/socd6/coastwatch/mixed_viirs/L3/global/chlora/daily/WW00/V2022177_D1_NPP-N20_WW00_chloci.nc 2022-06-29T03:24:06Z https://coastwatch.noaa.gov/thredds/dodsC/CoastWatch/VIIRS/npp-n20/chloci/DailyGlobal/WW00 2022-06-29T03:24:06Z http://coastwatch.pfeg.noaa.gov/griddap/nesdisVHNnoaaSNPPnoaa20chlaDaily.das"; String id "L3//data/data320/L3bin_global/VIIRSMIX/noaa_msl12_nrt/daily/2022/20220626/2km/infile_iop_2km_G_chl_oci_rhw1184_20703.nc"; String identifier_product_doi "https://dx.doi.org"; String identifier_product_doi_authority "https://dx.doi.org"; String infoUrl "https://coastwatch.noaa.gov/cw/satellite-data-products/ocean-color/near-real-time/viirs.html"; String institution "NOAA NESDIS STAR"; String instrument "VIIRS"; String keywords "algorithm, altitude, chemistry, chl_oci, chlorophyll, color, concentration, data, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Ocean Color, image, imager, imager/radiometer, imaging, infrared, L3, latitude, level, level-3, longitude, mapped, mass, mass_concentration_of_chlorophyll_a_in_sea_water, national, npp, ocean, ocean color, oceans, oci, optics, orbiting, partnership, polar, polar-orbiting, radiometer, science, sea, seawater, smi, standard, star, suite, suite/suomi-npp, suomi, time, viirs, viirs-n, viirsn, visible, water, ww00"; String keywords_vocabulary "GCMD Science Keywords"; String l2_flag_names "ATMFAIL,LAND,HIGLINT,HILT,HISATZEN,CLOUD,HISOLZEN,CHLFAIL,NAVWARN,CLDSHDSTL,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 89.75625; String platform "Suomi-NPP"; String processing_control_input_parameters_apply_pal "yes"; String processing_control_input_parameters_central_meridian "-999"; String processing_control_input_parameters_deflate "4"; String processing_control_input_parameters_east "180.0"; String processing_control_input_parameters_fudge "1.0"; String processing_control_input_parameters_ifile "/data/home004/hgu/docker_v224/bin/../temp/Config_mixed/infile_iop_2km_G_chl_oci.nc"; String processing_control_input_parameters_interp "nearest"; String processing_control_input_parameters_north "89.775"; String processing_control_input_parameters_ofile "/data/data369/viirs/L3/2022/06/26/V2022177_D1_NPP-N20_WW00_chl_oci.nc"; String processing_control_input_parameters_oformat "netcdf4"; String processing_control_input_parameters_oformat2 "png"; String processing_control_input_parameters_palette_dir "$OCDATAROOT/common/palette"; String processing_control_input_parameters_par "/data/home004/hgu/docker_v224/bin/../config/l3mapgen_par_chl_oci"; String processing_control_input_parameters_product "chl_oci"; String processing_control_input_parameters_product_rgb "rhos_671,rhos_551,rhos_486"; String processing_control_input_parameters_projection "platecarree"; String processing_control_input_parameters_quiet "false"; String processing_control_input_parameters_resolution "0.0375deg"; String processing_control_input_parameters_scale_type "log"; String processing_control_input_parameters_south "-89.775"; String processing_control_input_parameters_threshold "0"; String processing_control_input_parameters_use_quality "yes"; String processing_control_input_parameters_use_rgb "no"; String processing_control_input_parameters_west "-180.0"; String processing_control_l2_flag_names "ATMFAIL,LAND,HIGLINT,HILT,HISATZEN,CLOUD,HISOLZEN,CHLFAIL,NAVWARN,CLDSHDSTL,ALGICE,SEAICE,NAVFAIL,FILTER"; String processing_control_software_name "l3mapgen"; String processing_control_software_version "1.0.1-r12992"; String processing_control_source "infile_iop_2km_G_chl_oci.nc"; String processing_level "L3 Mapped"; String product_name "V2022177_D1_NPP-N20_WW00_chloci.nc"; 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"; String Sensor "VIIRS"; String sourceUrl "https://coastwatch.noaa.gov/thredds/dodsC/CoastWatch/VIIRS/npp-n20/chloci/DailyGlobal/WW00"; Float64 Southernmost_Northing -89.75625; String spatialResolution "4.17 km"; String standard_name_vocabulary "CF Standard Name Table v70"; String summary "Visible and Infrared Imager/Radiometer Suite/Suomi-NPP (VIIRSN) Level-3 Standard Mapped Image (WW00)"; String temporal_range "day"; String testOutOfDate "now-5days"; String time_coverage_end "2022-06-27T12:00:00Z"; String time_coverage_start "2018-08-09T12:00:00Z"; String title "Chlorophyll, Blended NOAA-SNPP and NOAA-20 VIIRS, Near Real-Time, Global, Level 3, 0.0375°, 2018-present EXPERIMENTAL, Daily"; Float64 Westernmost_Easting -179.98125; } }
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.