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Dataset Title:  KDPAR, NOAA VIIRS, Near Real-Time, Global, Level 3, 2015-present,
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Institution:  NOAA/NESDIS Center for Satellite Applications and Research (STAR)   (Dataset ID: nesdisVHNkdparDaily)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (Time Baseline, UTC) ?      304    1 day 5h 18m 25s (uneven)
  < slider >
 altitude (m) ?      1    (just one value)
  < slider >
 latitude (degrees_north) ?      4788    -0.0375 (even)
  < slider >
 longitude (degrees_east) ?      9602    0.0375 (even)
  < slider >
Grid Variables (which always also download all of the dimension variables)
 kd_par (Diffuse Attenuation Coefficient for PAR, m^-1) ?
 graphics (graphics overlay planes) ?

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 1.4973552e+9, 1.5293232e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time Baseline";
    String source_name "time_baseline";
    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 -89.75625000000002, 89.75625000000001;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "rows";
    String standard_name "latitude";
    String units "degrees_north";
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -180.01875, 180.01874999999998;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "cols";
    String standard_name "longitude";
    String units "degrees_east";
  kd_par {
    Int32 _ChunkSizes 1, 1, 902, 1808;
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 6.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String cw_atmospheric_correction "NOAA MECB BMW Atmospheric Correction";
    Int32 cw_fraction_digits 14;
    String cw_processing_algorithm "NOAA MECB Kd_PAR Algorithm";
    String cw_product_status "Experimental";
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "Diffuse Attenuation Coefficient for PAR";
    Float32 missing_value NaN;
    String units "m^-1";
  graphics {
    Int32 _ChunkSizes 1, 1, 1193, 2393;
    Byte _FillValue 0;
    String _Unsigned "false";
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum 0.0;
    Int32 cw_fraction_digits 0;
    String grid_mapping "coord_ref";
    String ioos_category "Optical Properties";
    String long_name "graphics overlay planes";
    Byte missing_value 0;
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "";
    String creator_name "NOAA/NESDIS Center for Satellite Applications and Research";
    String creator_type "group";
    String creator_url "";
    String cw_cwhdf_version "3.1";
    String cw_orbit_type "ascending";
    String cw_pass_type "day/night";
    String cw_processing_version "NRT NOAA";
    String cw_projection "Geographic";
    String cw_satellite "NPP";
    String cw_sensor "VIIRS";
    String cw_software_name "MSL12";
    String cw_software_version "1.02";
    String cw_viirs_band_naming_convention "IDPS";
    Float64 Easternmost_Easting 180.01874999999998;
    Float64 geospatial_lat_max 89.75625000000001;
    Float64 geospatial_lat_min -89.75625000000002;
    Float64 geospatial_lat_resolution 0.03750000000000001;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 180.01874999999998;
    Float64 geospatial_lon_min -180.01875;
    Float64 geospatial_lon_resolution 0.037500000000000006;
    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 
"[MSL12 1.30] /data/data055/operational/routine/bin/msl12_x64b par=/data/data097/xiaoming.liu/worktmp/MSL20180616/V2018167010654_NPP_NRTNIR.par
/home/pub/msoracco/aps/aps/aps/share/coastwatch/bin/netcdf_cf_ingest /home/pub/msoracco/aps/aps_o/aps/work/VRSVCW.B2018167.010657.hdf
[cwf 20161013_100454] cwregister --method=mixed --rectsize=16/16 --overwrite=always South750UW4590Geographic.hdf VRSVCW.B2018167.010657.hdf VRSVCW.B2018167.010657.UW00.mapped00.hdf
/home/pub/msoracco/aps/aps/aps/share/coastwatch/bin/cwfReassemble -j -e edgemask South750UW4590Geographic.hdf VRSVCW.B2018167.010657.UW00.edgemask.hdf VRSVCW.B2018167.010657.UW00.mapped00.hdf VRSVCW.B2018167.010657.UW00.mapped01.hdf
[cwf 20161013_100454] cwgraphics VRSVCW.B2018167.010657.UW00.edgemask.hdf
[cwf 20161013_100454] cwmath --template graphics --expr commonmask=(and(l2_flags,4650)==0) /home/pub/msoracco/aps/aps_o/browse/lvl3/seadas/coastwatch/hdf/VRSVCW_B2018167_010657_UW00_edgemask_masked.hdf
[cwf 20161013_100454] cwmath --template graphics --expr commonmask_nlw=(and(l2_flags,4650)==0) /home/pub/msoracco/aps/aps_o/browse/lvl3/seadas/coastwatch/hdf/VRSVCW_B2018167_010657_UW00_edgemask_masked.hdf
[cwf 20161013_100454] cwcomposite --pedantic --method explicit --inputs - --match ^(longitude|latitude|kd_par)$ /home/pub/msoracco/aps/aps_p/browse/lvl4/modis/coastwatch/hdf/VRSVCW_B2018167_C1_010657_UW00_edgemask_kdpar.hdf
[cwf 20161013_100454] cwgraphics /home/pub/msoracco/aps/aps_p/browse/lvl4/modis/coastwatch/hdf/VRSVCW_B2018167_C1_010657_UW00_edgemask_kdpar.hdf
[cwf 20161013_100454] cwimport --match=^graphics$ --copy /home/pub/msoracco/aps/aps/aps/share/coastwatch/icons/GlobalFourKmGeographic.hdf /home/pub/msoracco/aps/aps_v/browse/lvl4/modis/coastwatch/maskhdf/VRSVCW_B2018167_B2018167_D1_WW00_edgemask_kdpar.hdf
    String infoUrl "";
    String institution "NOAA/NESDIS Center for Satellite Applications and Research (STAR)";
    String keywords "altitude, applications, attenuation, available, baseline, center, coefficient, data, diffuse, environmental, graphics, imager, imager/radiometer, imaging, information, infrared, kd_par, kdpar, latitude, longitude, mean, national, nesdis, noaa, npp, optical, optical properties, orbiting, overlay, par, partnership, photosynthetically, planes, polar, polar-orbiting, properties, radiation, radiometer, research, satellite, service, suite, time, viirs, visible, ww00";
    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 89.75625000000001;
    String OBSERVED_PROPERTY "kd_par";
    String source "NPP_VIIRS_kdpar";
    String sourceUrl "";
    Float64 Southernmost_Northing -89.75625000000002;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Visible and Infrared Imager/Radiometer Suite/Suomi-NPP (VIIRSN) Level-3 (WW00), Diffuse Attenuation Coefficient for PAR (kdpar), Near Real-Time, Global, Daily, processed by NOAA.  EXPERIMENTAL.";
    String time_coverage_end "2018-06-18T12:00:00Z";
    String time_coverage_start "2017-06-13T12:00:00Z";
    String title "KDPAR, NOAA VIIRS, Near Real-Time, Global, Level 3, 2015-present, EXPERIMENTAL, Daily";
    Float64 Westernmost_Easting -180.01875;


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{?query}
For example,[(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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