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Dataset Title:  Diffuse Attenuation K490, Aqua MODIS, OSU DB, West US, EXPERIMENTAL (Hourly)
Dataset ID:  erdMYk490hday
Institution:  NOAA CoastWatch, West Coast Node
Information:  Summary | Variables | Background | Data Access Form  

Graph Type: 
X Axis: 
Y Axis: 
Color: 

Dimension Ranges    Start    Stop
time (UTC)     specify just 1 value →
   
altitude (m)     specify just 1 value →
   
latitude (degrees_north)
   
   
longitude (degrees_east)
   
   

Graph Settings
Color Bar:    Continuity:    Scale:
      Min:    Max:    N Sections:
Draw the land mask:

Then set the File Type: and
  or view the URL:
    The graph you specified. Please be patient. It may take a long time to get data from the source.

Things You Can Do With Your Graphs

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.13926182e+9, 1.23481986e+9;
    String axis "T";
    Int32 fraction_digits 0;
    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";
    Int32 fraction_digits 0;
    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 22.0, 51.0;
    String axis "Y";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 205.0, 255.0;
    String axis "X";
    String coordsys "geographic";
    Int32 fraction_digits 4;
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  k490 {
    Float32 _FillValue -9999999.0;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String coordsys "geographic";
    Int32 fraction_digits 3;
    String ioos_category "Optical Properties";
    String long_name "Diffuse Attenuation Coefficient K490";
    Float32 missing_value -9999999.0;
    String units "m-1";
  }
  NC_GLOBAL {
    String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
    String cdm_data_type "Grid";
    String composite "false";
    String contributor_name "NASA, OSU/COAS";
    String contributor_role "Source of level 2 data.";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0";
    String creator_email "dave.foley@noaa.gov";
    String creator_name "NOAA CoastWatch, West Coast Node";
    String creator_url "http://coastwatch.pfel.noaa.gov";
    String date_created "2009-02-16Z";
    String date_issued "2009-02-16Z";
    Float64 Easternmost_Easting 255.0;
    Float64 geospatial_lat_max 51.0;
    Float64 geospatial_lat_min 22.0;
    Float64 geospatial_lat_resolution 0.0125;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 255.0;
    Float64 geospatial_lon_min 205.0;
    Float64 geospatial_lon_resolution 0.0125;
    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 
"NASA, OSU/COAS
2009-02-16T06:25:19Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD
2009-02-17 http://192.168.31.18/thredds/dodsC/satellite/MY/k490/hday
2009-02-17 http://coastwatch.pfeg.noaa.gov/griddap/erdMYk490hday.das";
    String infoUrl "http://coastwatch.pfel.noaa.gov/infog/MY_k490_las.html";
    String institution "NOAA CoastWatch, West Coast Node";
    String keywords "EARTH SCIENCE > Oceans > Ocean Optics > Attenuation/Transmission";
    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, 
CoastWatch, 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 naming_authority "gov.noaa.pfel.coastwatch";
    Float64 Northernmost_Northing 51.0;
    String origin "NASA, OSU/COAS";
    String processing_level "3";
    String project "CoastWatch (http://coastwatch.noaa.gov/)";
    String projection "geographic";
    String projection_type "mapped";
    String references 
"Aqua/MODIS information: http://oceancolor.gsfc.nasa.gov/ . MODIS 
information: http://coastwatch.noaa.gov/modis_ocolor_overview.html .";
    String satellite "Aqua";
    String sensor "MODIS";
    String source "satellite observation: Aqua, MODIS";
    String sourceUrl "http://192.168.31.18/thredds/dodsC/satellite/MY/k490/hday";
    Float64 Southernmost_Northing 22.0;
    String standard_name_vocabulary "CF-1.0";
    String summary 
"OSU distributes Diffuse Attenuation Coefficient at 490 nm Wavelength data 
from NASA's Aqua satellite.  Measurements are gathered by the Moderate 
Resolution Imaging Spectroradiometer (MODIS) carried aboard the spacecraft.  
Data is received from the satellite and processed to level 2 by the Oregon 
State University (OSU) College of Oceanic and Atmospheric Sciences (COAS). 
THIS IS AN EXPERIMENTAL PRODUCT: intended strictly for scientific evaluation 
by professional marine scientists.";
    String title "Diffuse Attenuation K490, Aqua MODIS, OSU DB, West US, EXPERIMENTAL (Hourly)";
    Float64 Westernmost_Easting 205.0;
  }
}

 

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request gridded data (for example, environmental data from satellites) and graphs of gridded data, via specially formed URLs.
The URLs specify everything: the dataset, the desired file type for the response, and the subset of data that you want to receive.
You can form these URLs by hand or with a computer program,
or (much easier) you can use the dataset's "Data Access Form" (oriented to requests for data)
or the dataset's "Make A Graph" form (oriented to requests for graphs and maps),
both of which generate the URL when the form is submitted.
griddap is a superset of the OPeNDAP DAP hyperslab protocol.

griddap request URLs must be in the form
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/ datasetID fileType {?query}
For example,
   http://coastwatch.pfeg.noaa.gov/erddap/griddap/erdBAssta5day.htmlTable?sst[(2007-10-21T00:00:00)][0][(-75):100:(75)][(180):100:(360)]

For details, see the griddap Documentation.
 
ERDDAP Version 1.12

Questions, comments, suggestions? Contact bob dot simons at noaa dot gov.
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