Easier access to scientific data
Brought to you by NOAA NMFS SWFSC ERD
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ERDDAP
Easier access to scientific data |
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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | MODIS Aqua par and KD_490 product taken from OCBG. Processed at the University of Delaware for use in Thredds/Erddap 
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| Institution: | University of Delaware (Dataset ID: NASA_VIIRS_kdpar) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Make a graph
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Attributes {
time {
UInt32 _ChunkSizes 1048576;
String _CoordinateAxisType "Time";
Float64 actual_range 1.37410554e+9, 1.54362234e+9;
String axis "T";
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";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 actual_range -89.97917938232422, 89.97916412353516;
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 -179.9791717529297, 179.9791717529297;
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
}
Kd_490 {
UInt32 _ChunkSizes 1, 720, 1440;
Float32 _FillValue -999.0;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String ioos_category "Optical Properties";
String long_name "Diffuse attenuation coefficient at 490 nm, KD2 algorithm";
Float32 missing_value -999.0;
String units "m^-1";
}
par {
UInt32 _ChunkSizes 1, 720, 1440;
Float32 _FillValue -999.0;
Float64 colorBarMaximum 70.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Optical Properties";
String long_name "Photosynthetically Available Radiation, R. Frouin";
Float32 missing_value -999.0;
String standard_name "downwelling_photosynthetic_photon_radiance_in_sea_water";
String units "einstein m^-2 day^-1";
}
NC_GLOBAL {
String cdm_data_type "Grid";
String Conventions "CF-1.6, COARDS, ACDD-1.3";
String creator_email "moliver@udel.edu";
String creator_name "Matthew Oliver";
String creator_type "person";
String creator_url "https://www.udel.edu/";
Float64 Easternmost_Easting 179.9791717529297;
Float64 geospatial_lat_max 89.97916412353516;
Float64 geospatial_lat_min -89.97917938232422;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 179.9791717529297;
Float64 geospatial_lon_min -179.9791717529297;
String geospatial_lon_units "degrees_east";
String groundstation "NASA OCBG";
String history
"satellite observation NASA MODIS-Aqua instrument
2025-10-31T06:50:50Z (local files)
2025-10-31T06:50:50Z http://basin.ceoe.udel.edu/erddap/griddap/NASA_VIIRS_kdpar.das";
String infoUrl "http://orb.ceoe.udel.edu/";
String institution "University of Delaware";
String keywords "active, algorithm, aqua, attenuation, available, coefficient, data, delaware, diffuse, downwelling, downwelling_photosynthetic_photon_radiance_in_sea_water, earth, Earth Science > Oceans > Ocean Optics > Photosynthetically Active Radiation, Earth Science > Oceans > Ocean Optics > Radiance, erddap, frouin, imaging, kd2, Kd_490, moderate, modis, ocbg, ocean, oceans, optical, optical properties, optics, par, photon, photosynthetic, photosynthetically, processed, product, properties, radiance, radiation, resolution, science, sea, seawater, spectroradiometer, taken, time, university, use, water";
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 89.97916412353516;
String product_list "par";
String source "satellite observation NASA MODIS-Aqua instrument";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -89.97917938232422;
String standard_name_vocabulary "CF Standard Name Table v29";
String summary "VIIRS NPP par and KD_490 product taken from OCBG. Processed at the University of Delaware for use in Thredds/Erddap";
String time_coverage_end "2018-11-30T23:59:00Z";
String time_coverage_start "2013-07-17T23:59:00Z";
String title "MODIS Aqua par and KD_490 product taken from OCBG. Processed at the University of Delaware for use in Thredds/Erddap";
String url "http://orb.ceoe.udel.edu/";
Float64 Westernmost_Easting -179.9791717529297;
}
}
Data Access Protocol (DAP) and its
projection constraints.
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.