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Dataset Title:  X-Experimental Far Red Remote Sensing Reflectance (745nm 862nm), S-NPP VIIR,
Alaska, Daily
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Institution:  NOAA/NESDIS/STAR/CoastWatch West Coast   (Dataset ID: rrs_far_red_alaska)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
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Y Axis:  ?
Color:  ?
 
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3281264e+9, 1.6587756e+9;
    String axis "T";
    String calendar "gregorian";
    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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 54.00375, 73.99875;
    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 175.00125, 209.99625;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Rrs_745 {
    Float32 _FillValue -999.0;
    String colorBarMaximum ".01";
    Float64 colorBarMinimum 0.0;
    String colorBarMinimun "0";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Remove Sensing Reflectance 745nm";
    Float32 missing_value -999.0;
    String standard_name "surface_ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radiative_flux_in_air";
    String units "sr^-1";
  }
  Rrs_862 {
    Float32 _FillValue -999.0;
    String colorBarMaximum ".01";
    Float64 colorBarMinimum 0.0;
    String colorBarMinimun "0";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Remove Sensing Reflectance 862nm";
    Float32 missing_value -999.0;
    String standard_name "surface_ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radiative_flux_in_air";
    String units "sr^-1";
  }
  par {
    Float32 _FillValue -999.0;
    String colorBarMaximum "70.0";
    Float64 colorBarMinimum 0.0;
    String colorBarMinimun "0";
    String coverage_content_type "auxiliaryInformation";
    String ioos_category "Optical Properties";
    String long_name "Photosynthetically Available Radiation";
    Float32 missing_value -999.0;
    String standard_name "downwelling_photosynthetic_photon_radiance_in_sea_water";
    String units "sr^-1";
  }
  kd_490 {
    Float32 _FillValue -999.0;
    String colorBarMaximum "6.0";
    Float64 colorBarMinimum 0.0;
    String colorBarMinimun "0";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Diffuse Attenuation Coefficient at 490nm";
    Float32 missing_value -999.0;
    String units "m-1";
  }
  kd_par {
    Float32 _FillValue -999.0;
    String colorBarMaximum "6.0";
    Float64 colorBarMinimum 0.0;
    String colorBarMinimun "0";
    String coverage_content_type "auxiliaryInformation";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Diffuse Attenuation Coefficient for PAR";
    Float32 missing_value -999.0;
    String units "m-1";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.12.0,";
    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/CoastWatch/WestCoast";
    String creator_type "institution";
    String creator_url "http://www.star.nesdis.noaa.gov/socd/mecb/color/";
    Float64 Easternmost_Easting 209.99625;
    Float64 geospatial_lat_max 73.99875;
    Float64 geospatial_lat_min 54.00375;
    Float64 geospatial_lat_resolution 0.0075000000000000015;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 209.99625;
    Float64 geospatial_lon_min 175.00125;
    Float64 geospatial_lon_resolution 0.007500000000000001;
    String geospatial_lon_units "degrees_east";
    String history 
"Spacial bin of CoastWatch high resolution sectors
2024-06-23T01:16:59Z (local files)
2024-06-23T01:16:59Z https://polarwatch.noaa.gov/griddap/rrs_far_red_alaska.das";
    String infoUrl "http://www.star.nesdis.noaa.gov/socd/mecb/color/";
    String institution "NOAA/NESDIS/STAR/CoastWatch West Coast";
    String instrument "VIIRS";
    String keywords "745nm, 862nm, alaska, attenuation, coefficient, coefficients, color, color/ocean, daily, data, day, diffuse, downwelling, downwelling_photosynthetic_photon_radiance_in_sea_water, earth, Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Ocean Color/Ocean Turbidity/Water-Leaving Radiance/Extinction Coefficients, Earth Science > Oceans > Ocean Optics > Photosynthetically Active Radiation, Earth Science > Oceans > Ocean Optics > Radiance, emerging, environmental, extinction, flux, information, kd490, kd_490, kd_par, kdpar, latitude, leaving, longitude, national, nesdis, noaa, noaa/nesdis, npp, ocean, oceans, optical, optical properties, optics, par, photosynthetic, photosynthetically, polar, polar-orbiting, radiance, radiance/extinction, radiation, reflectance, Rrs_745, Rrs_862, s-npp, satellite, sea, seawater, snpp, star, surface, surface_ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radiative_flux_in_air, time, turbidity, turbidity/water-leaving, upwelling, viirs";
    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.";
    Float64 Northernmost_Northing 73.99875;
    String platform "S-NPP";
    String publisher_email "coastwatch.info@noaa.gov";
    String publisher_name "NOAA CoastWatch West Coast, NOAA/NMFS/SWFSC/ERD)";
    String publisher_type "institution";
    String publisher_url "https://coastwatch.noaa.gov; https://www.ncei.noaa.gov/";
    String satellite "S-NPP";
    String sensor "VIIRS";
    String source "S-NPP_VIIRS_chlora";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 54.00375;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Ocean color products include remote sensing reflectance at 745nm and 862nm, chlorophyll-a concentration, diffusive attenuation coefficient at 490 nm and diffusive attenuation coefficient of the photosynthetically available radiation (PAR).";
    String time_coverage_end "2022-07-25T19:00:00Z";
    String time_coverage_start "2012-02-01T20:00:00Z";
    String title "X-Experimental Far Red Remote Sensing Reflectance (745nm 862nm), S-NPP VIIR, Alaska, Daily";
    Float64 Westernmost_Easting 175.00125;
  }
}

 

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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