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Dataset Title: | Chlorophyll, NOAA S-NPP VIIRS, Science Quality, Global 4km, Level 3, 2012- present, Daily |
Institution: | NOAA NESDIS CoastWatch (Dataset ID: nesdisVHNSQchlaDaily) |
Information: | Summary | License | FGDC | ISO 19115 | Metadata | Background | Data Access Form | Files |
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Attributes { time { String _CoordinateAxisType "Time"; Float64 actual_range 1.325592e+9, 1.7324496e+9; String axis "T"; String calendar "gregorian"; String coverage_content_type "coordinate"; String ioos_category "Time"; String long_name "Centered 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 coverage_content_type "coordinate"; 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 comment "The latitude values are the centers of the grid cells."; String coverage_content_type "coordinate"; 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 comment "The longitude values are the centers of the grid cells."; String coverage_content_type "coordinate"; 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; } 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 grid_mapping "coord_ref"; String ioos_category "Ocean Color"; String long_name "Chlorophyll Concentration, Default Algorithm"; String references "O and #39;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 cdm_data_type "Grid"; String comment "This is science quality data."; 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"; 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"; String grid_mapping_name "latitude_longitude"; String history "/data/data369/hgu/v224/bin/l3mapgen par=/data/data652/coastwatch/oc/L3/scripts/bin/../config/l3mapgen_par_chlor_a ifile=/data/data652/coastwatch/oc/L3/scripts/bin/../temp/Config_bmw/infile_2km_G.nc ofile=/data/data369/viirs/L3/2024/11/24/V2024329_D1_WW00_chlor_a.nc Tue Dec 3 19:16:59 2024 : /data/data652/coastwatch/oc/L3/scripts/bin/l3cnvtr -r 4 /data/data369/viirs/L3/2024/11/24/V2024329_D1_WW00_chlor_a.nc /data/aftp/socd1/mecb/coastwatch/viirs/science/L3/global/chlora/daily/WW00/V2024329_D1_WW00_chlora.nc 2024-12-05T18:38:59Z (local files) 2024-12-05T18:38:59Z https://coastwatch.pfeg.noaa.gov/griddap/nesdisVHNSQchlaDaily.das"; String id "noaacwNPPVIIRSSQchlaDaily"; 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/science-quality/viirs-snpp.html"; String institution "NOAA NESDIS CoastWatch"; String instrument "VIIRS"; String keywords "algorithm, altitude, chemistry, chlor_a, chlorophyll, color, concentration, daily, data, default, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, 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, Oceans > Ocean Optics > Ocean Color, optics, orbiting, partnership, polar, polar-orbiting, radiometer, sea, seawater, smi, standard, star, suite, suite/suomi-npp, suomi, time, VIIRS, viirs, viirs-n, visible, water, ww00"; 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 "https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/ Please acknowledge the use of these data with the following statement: \\\"These data were provided by NOAA's Center for Satellite Applications and Research (STAR) and the CoastWatch program.\\\" To reference these data as a citation in a paper, please follow the instructions in the license and at this link: https://coastwatch.noaa.gov/erddap/information.html#citeDataset"; String map_projection "geographic"; String measure "Mean"; String naming_authority "gov.noaa.coastwatch"; Float64 Northernmost_Northing 89.75625; String platform "Suomi-NPP"; String processing_level "L3 Mapped"; String processing_version "Unspecified"; String product_name "NOAA S-NPP VIIRS ocean color products from CoastWatch"; String project "Ocean Color Science Team (NOAA/NESDIS/STAR/OCST)"; String publisher_email "coastwatch.info@noaa.gov"; String publisher_name "NOAA CoastWatch Central"; String publisher_type "group"; String publisher_url "https://coastwatch.noaa.gov/erddap/"; String references "O and #39;Reilly J. E. et al. (1998), Ocean color chlorophyll algorithms for SeaWiFS, J. Geophys. Res., 103(C11), 2493724953"; String Satellite "Suomi-NPP"; String Sensor "VIIRS"; String source "Satellite observations from VIIRS ocean color sensor"; String sourceUrl "(local files)"; Float64 Southernmost_Northing -89.75625; String spatialResolution "4.17 km"; String standard_name_vocabulary "CF Standard Name Table v29"; String summary "Level-3 Standard Mapped Image (SMI), Global, 4km, Chlorophyll, Daily composite data from the Visible and Infrared Imager/Radiometer Suite (VIIRS). These are science quality data with a 15-day latency. The data, processed by the NOAA/STAR Ocean Color Team, are produced from MSL12 v1.2 using OC-SDR v04 and were release by CoastWatch as of 2017-08-07. VIIRS is a multi-disciplinary instrument that flies on the Suomi-NPP (National Polar-orbiting Partnership) satellite and is the successor to MODIS. Suomi-NPP is the initial spacecraft in the JPSS (Joint Polar Satellite Systems) series of spacecraft. JPSS is our Nation's next generation polar-orbiting operational environmental satellite system. JPSS is a collaborative program between NOAA and its acquisition agent NASA."; String temporal_range "day"; String testOutOfDate "now-2days"; String time_coverage_end "2024-11-24T12:00:00Z"; String time_coverage_resolution "PD1"; String time_coverage_start "2012-01-03T12:00:00Z"; String title "Chlorophyll, NOAA S-NPP VIIRS, Science Quality, Global 4km, Level 3, 2012-present, 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.