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Dataset Title:  Standard Deviations of SeaWIFS products at 50km rolling 8-day resolution Subscribe RSS
Institution:  University of Delaware   (Dataset ID: seawifs_std_50km_8day)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      3355    1 day 2h 7m 57s (uneven)
  < slider >
 latitude (degrees_north) ?      389    0.4627572 (even)
  < slider >
 longitude (degrees_east) ?      778    0.462963 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables) 
 chl_ocx_std_dev (mg m^-3) ?
 kd_490_std_dev (m^-1) ?
 par_std_dev (einstein m^-2 day^-1) ?
 poc_std_dev (mg m^-3) ?
 Zeu_lee_std_dev (m) ?
 Zeu_lee_count ?
 poc_count ?
 par_count ?
 kd_490_count ?
 chl_ocx_count ?

File type: (more information)

(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 9.467028e+8, 1.2622356e+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 -89.82117283950616, 89.72862139917694;
    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 -179.7685185185185, 179.95370370370364;
    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_ocx_std_dev {
    Float32 _FillValue -999.0;
    String comment "standard deviation computed in log10 transformed values, then backtransformed to real values";
    String coverage_content_type "physicalMeasurement";
    Float64 display_max 12.0;
    Float64 display_min 1.0;
    String display_scale "linear";
    String ioos_category "Unknown";
    String long_name "Chl Ocx Std Dev";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "O'Reilly, J.E., and 24 Coauthors, 2000: SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3. NASA Tech. Memo. 2000-206892, Vol. 11, S.B. Hooker and E.R. Firestone, Eds., NASA Goddard Space Flight Center, 49 pp.; https://oceancolor.sci.gsfc.nasa.gov/resources/docs/technical/seawifs_reports/postlaunch/post_vol11_abs/";
    String standard_name "standard_deviation_mass_concentration_of_chlorophyll_in_sea_water";
    String units "mg m^-3";
    Float32 valid_max 11.33;
    Float32 valid_min 1.0;
  }
  kd_490_std_dev {
    Float32 _FillValue -999.0;
    String comment "standard deviation computed in log10 transformed values, then backtransformed to real values";
    String coverage_content_type "physicalMeasurement";
    Float64 display_max 6.7;
    Float64 display_min 1.0;
    String display_scale "linear";
    String ioos_category "Unknown";
    String long_name "Kd 490 Std Dev";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String units "m^-1";
    Float32 valid_max 6.7;
    Float32 valid_min 1.0;
  }
  par_std_dev {
    Float32 _FillValue -999.0;
    String coverage_content_type "physicalMeasurement";
    Float64 display_max 10.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Optical Properties";
    String long_name "Par Std Dev";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "Frouin, R., Ligner, D.W., and Gautier, C., 1989: A Simple analytical formula to compute clear sky total and photosynthetically available solar irradiance at the ocean surface. J. Geophys. Res., 94, 9731-9742.";
    String standard_name "standard_deviation_surface_downwelling_photosynthetic_photon_flux_in_air";
    String units "einstein m^-2 day^-1";
    Float32 valid_max 21.43;
    Float32 valid_min 1.0;
  }
  poc_std_dev {
    Float32 _FillValue -999.0;
    String comment "standard deviation computed in log10 transformed values, then backtransformed to real values";
    String coverage_content_type "physicalMeasurement";
    Float64 display_max 10.0;
    Float64 display_min 1.0;
    String display_scale "linear";
    String ioos_category "Ocean Color";
    String long_name "Poc Std Dev";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "Stramski, D., et al. \"Relationships between the surface concentration of particulate organic carbon and optical properties in the eastern South Pacific and eastern Atlantic Oceans.\" Biogeosciences 5.1 (2008): 171-201.";
    String units "mg m^-3";
    Float32 valid_max 7.44;
    Float32 valid_min 1.0;
  }
  Zeu_lee_std_dev {
    Float32 _FillValue -999.0;
    String coverage_content_type "physicalMeasurement";
    Float64 display_max 55.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Unknown";
    String long_name "Zeu Lee Std Dev";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String units "m";
    Float32 valid_max 50.6;
    Float32 valid_min 0.0;
  }
  Zeu_lee_count {
    Float32 _FillValue -999.0;
    String ancillary_variables "Euphotic depth, Lee algorithm";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comments "Count of 9km daily Zeu_lee observation used for Standard Deviation Calculation";
    String coverage_content_type "qualityInformation";
    Float64 display_max 288.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Statistics";
    String long_name "Zeu Lee Count";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String standard_name "number_of_observations";
    Float32 valid_max 288.0;
    Float32 valid_min 0.0;
  }
  poc_count {
    Float32 _FillValue -999.0;
    String ancillary_variables "poc";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comments "Count of 9km daily poc observation used for Standard Deviation Calculation";
    String coverage_content_type "qualityInformation";
    Float64 display_max 288.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Statistics";
    String long_name "Poc Count";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "Stramski, D., et al. \"Relationships between the surface concentration of particulate organic carbon and optical properties in the eastern South Pacific and eastern Atlantic Oceans.\" Biogeosciences 5.1 (2008): 171-201.";
    String standard_name "number_of_observations";
    Float32 valid_max 288.0;
    Float32 valid_min 0.0;
  }
  par_count {
    Float32 _FillValue -999.0;
    String ancillary_variables "par";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comments "Count of 9km daily par observation used for Standard Deviation Calculation";
    String coverage_content_type "qualityInformation";
    Float64 display_max 288.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Statistics";
    String long_name "Par Count";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "Frouin, R., Ligner, D.W., and Gautier, C., 1989: A Simple analytical formula to compute clear sky total and photosynthetically available solar irradiance at the ocean surface. J. Geophys. Res., 94, 9731-9742.";
    String standard_name "number_of_observations";
    Float32 valid_max 288.0;
    Float32 valid_min 0.0;
  }
  kd_490_count {
    Float32 _FillValue -999.0;
    String ancillary_variables "kd_490";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comments "Count of 9km daily kd_490 observation used for Standard Deviation Calculation";
    String coverage_content_type "qualityInformation";
    Float64 display_max 288.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Statistics";
    String long_name "Kd 490 Count";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String standard_name "number_of_observations";
    Float32 valid_max 288.0;
    Float32 valid_min 0.0;
  }
  chl_ocx_count {
    Float32 _FillValue -999.0;
    String ancillary_variables "chl_ocx";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comments "Count of 9km daily chl_ocx observation used for Standard Deviation Calculation";
    String coverage_content_type "qualityInformation";
    Float64 display_max 288.0;
    Float64 display_min 0.0;
    String display_scale "linear";
    String ioos_category "Statistics";
    String long_name "Chl Ocx Count";
    Float32 missing_value -999.0;
    String platform "Orbview-2";
    String reference "O'Reilly, J.E., and 24 Coauthors, 2000: SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3. NASA Tech. Memo. 2000-206892, Vol. 11, S.B. Hooker and E.R. Firestone, Eds., NASA Goddard Space Flight Center, 49 pp.; https://oceancolor.sci.gsfc.nasa.gov/resources/docs/technical/seawifs_reports/postlaunch/post_vol11_abs/";
    String standard_name "number_of_observations";
    Float32 valid_max 288.0;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment "Be wary of using the first 8 days of the mission period as these will have fewer observations then expected supplied to the calculations.";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "moliver@udel.edu";
    String creator_name "The Ocean Exploration, Remote Sensing and Biogeography Laboratory (ORB Lab)";
    String creator_url "https://sites.udel.edu/ceoe-moliver/";
    String date_created "2024-10-25T00:00:00.000Z";
    Float64 Easternmost_Easting 179.95370370370364;
    Float64 easternmost_longitude 180.0;
    String geospatial_bounds_crs "WGS84";
    Float64 geospatial_lat_max 89.72862139917694;
    Float64 geospatial_lat_min -89.82117283950616;
    Float64 geospatial_lat_resolution 0.46275720164609047;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.95370370370364;
    Float64 geospatial_lon_min -179.7685185185185;
    Float64 geospatial_lon_resolution 0.4629629629629629;
    String geospatial_lon_units "degrees_east";
    String history 
"Input data acquired from https://oceancolor.gsfc.nasa.gov, processed at University of Delaware
2025-09-10T18:46:32Z (local files)
2025-09-10T18:46:32Z http://ocean-data.ceoe.udel.edu/erddap/griddap/seawifs_std_50km_8day.das";
    String id "seawifs.2004.L3m.8D.50km.std.nc";
    String infoUrl "???";
    String institution "University of Delaware";
    String instrument "SeaWiFS";
    String keywords "available, chl, chl_ocx_count, chl_ocx_std_dev, chlorophyll, color, count, data, depth, dev, kd_490_count, kd_490_std_dev, lee, local, ocean, ocean color, ocx, optical, optical properties, par, par_count, par_std_dev, photosynthetically, poc, poc_count, poc_std_dev, profiler, properties, radiation, salinity, salinity-temperature-depth, source, statistics, std, temperature, time, zeu, Zeu_lee_count, Zeu_lee_std_dev";
    String keywords_vocabulary "NASA/Global Change Master Directory (GCMD) Science Keywords v8.4";
    String latitude_units "degrees_north";
    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.";
    String longitude_units "degrees_east";
    String map_projection "Equidistant Cylindrical";
    String naming_authority "gov.nasa.gsfc.sci.oceandata";
    String NCO "netCDF Operators version 4.7.6 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 northernmost_latitude 90.0;
    Float64 Northernmost_Northing 89.72862139917694;
    String platform "Orbview-2";
    String processing_level "L3 Mapped";
    String project "NASA Earth Science division, ROSES 2020 Program";
    String publisher_email "data@oceancolor.gsfc.nasa.gov";
    String publisher_name "NASA/GSFC/OB.DAAC";
    String publisher_url "https://oceandata.sci.gsfc.nasa.gov";
    String sourceUrl "(local files)";
    Float64 southernmost_latitude -90.0;
    Float64 Southernmost_Northing -89.82117283950616;
    String spatialResolution "50 km";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Standard Deviations of SeaWIFS products at 50km rolling 8-day resolution. Averaging performed by NetCDF Operators";
    String temporal_range "10-year";
    String time_coverage_end "2009-12-31T05:00:00Z";
    String time_coverage_start "2000-01-01T05:00:00Z";
    String title "Standard Deviations of SeaWIFS products at 50km rolling 8-day resolution";
    Float64 Westernmost_Easting -179.7685185185185;
    Float64 westernmost_longitude -180.0;
  }
}

 

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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