Make A Graph

Dataset Title:	METOP-B ASCAT daily products
Institution:	NOAA (Dataset ID: ASCAT_WINDS_METOP_B_AOML)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

latitude (degrees_north)

longitude (degrees_east)

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Minimum:	Maximum:	N Sections:
Draw land mask:
Y Axis Minimum:	Maximum:

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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:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    Int32 _ChunkSizes 524288;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.57788e+9, 1.7378928e+9;
    String axis "T";
    String calendar "Gregorian";
    String CoordinateAxisType "Time";
    String ioos_category "Time";
    String long_name "Reference Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    Int32 _ChunkSizes 720;
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.875, 89.875;
    String axis "Y";
    String CoordinateAxisType "Lat";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Int32 _ChunkSizes 1440;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -179.875, 179.875;
    String axis "X";
    String CoordinateAxisType "Lon";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  uwnd_Ascending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range -23.2, 34.57;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum -50.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Zonal Wind";
    String standard_name "eastward_wind";
    String units "m s-1";
    String variable_info "10-meter Zonal Wind, Ascending Passes";
  }
  vwnd_Ascending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range -22.29, 25.1;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum -50.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Meridional Wind";
    String standard_name "northward_wind";
    String units "m s-1";
    String variable_info "10-meter Meridional Wind, Ascending Passes";
  }
  WSPD_Ascending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 0.2, 36.53;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Surface Wind Speed, Ascending Passes";
    String standard_name "wind_speed";
    String units "m s-1";
    String variable_info "10-meter Surface Wind Speed, Ascending Passes";
  }
  Rain_Flag_Ascending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "0=no rain, 1=rain";
    String coordsys "geographic";
    String ioos_category "Quality";
    String long_name "Rain Flag, Ascending Passes";
    String variable_info "Rain Flag, Ascending Passes";
  }
  Time_Ascending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 1920.0, 83968.0;
    Float64 colorBarMaximum 24.0;
    Float64 colorBarMinimum 0.0;
    String coordsys "geographic";
    String ioos_category "Time";
    String long_name "Decimal Hour of the Day, Ascending Passes";
    String standard_name "not defined";
    String units "hour";
    String variable_info "Hour of the Day, Ascending Passes";
  }
  uwnd_Descending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range -21.09, 33.84;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum -50.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Zonal Wind";
    String standard_name "eastward_wind";
    String units "m s-1";
    String variable_info "10-meter Zonal Wind, Descending Passes";
  }
  vwnd_Descending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range -35.07, 19.69;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum -50.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Meridional Wind";
    String standard_name "northward_wind";
    String units "m s-1";
    String variable_info "10-meter Meridional Wind, Descending Passes";
  }
  WSPD_Descending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 0.2, 36.61;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String coordsys "geographic";
    String ioos_category "Wind";
    String long_name "Surface Wind Speed, Descending Passes";
    String standard_name "wind_speed";
    String units "m s-1";
    String variable_info "10-meter Surface Wind Speed, Descending Passes";
  }
  Rain_Flag_Descending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "0=no rain, 1=rain";
    String coordsys "geographic";
    String ioos_category "Quality";
    String long_name "Rain Flag, Descending Passes";
    String variable_info "Rain Flag, Descending Passes";
  }
  Time_Descending {
    Int32 _ChunkSizes 1, 720, 1440;
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 86272.0;
    Float64 colorBarMaximum 24.0;
    Float64 colorBarMinimum 0.0;
    String coordsys "geographic";
    String ioos_category "Time";
    String long_name "Decimal Hour of the Day, Descending Passes";
    String standard_name "not defined";
    String units "hour";
    String variable_info "Hour of the Day, Descending Passes";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String contact "Joaquin.Trinanes@noaa.gov";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "Joaquin.Trinanes@noaa.gov";
    String creator_name "ATLANTIC OCEANWATCH";
    String creator_url "https://cwcgom.aoml.noaa.gov";
    Float64 Easternmost_Easting 179.875;
    Float64 geospatial_lat_max 89.875;
    Float64 geospatial_lat_min -89.875;
    Float64 geospatial_lat_resolution 0.25;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.875;
    Float64 geospatial_lon_min -179.875;
    Float64 geospatial_lon_resolution 0.25;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-01-26T11:51:45Z https://cwcgom.aoml.noaa.gov/thredds/dodsC/ASCAT/METOPB.nc
2025-01-26T11:51:45Z http://cwcgom.aoml.noaa.gov:8080/griddap/ASCAT_WINDS_METOP_B_AOML.das";
    String history_of_appended_files 
"Sat Jan 25 20:21:03 2025: Appended file timed.grd had following \"history\" attribute:
Sat Jan 25 20:21:03 2025: ncrename -v z,Time_Descending timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a ioos_category,z,c,c,Time timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a standard_name,z,c,c,not defined timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a variable_info,z,c,c,Hour of the Day, Descending Passes timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a coordsys,z,c,c,geographic timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a units,z,c,c,hour timed.grd
Sat Jan 25 20:21:03 2025: ncatted -a long_name,z,m,c,Decimal Hour of the Day, Descending Passes timed.grd
xyz2grd -As -Rd -I0.25 -r -: timed.txt -Gtimed.grd
Sat Jan 25 20:21:03 2025: Appended file rainfd.grd had following \"history\" attribute:
Sat Jan 25 20:21:03 2025: ncrename -v z,Rain_Flag_Descending rainfd.grd
Sat Jan 25 20:21:03 2025: ncatted -a comment,z,c,c,0=no rain, 1=rain rainfd.grd
Sat Jan 25 20:21:03 2025: ncatted -a ioos_category,z,c,c,Quality rainfd.grd
Sat Jan 25 20:21:03 2025: ncatted -a variable_info,z,c,c,Rain Flag, Descending Passes rainfd.grd
Sat Jan 25 20:21:03 2025: ncatted -a coordsys,z,c,c,geographic rainfd.grd
Sat Jan 25 20:21:03 2025: ncatted -a long_name,z,m,c,Rain Flag, Descending Passes rainfd.grd
xyz2grd -As -Rd -I0.25 -r -: rainfd.txt -Grainfd.grd
Sat Jan 25 20:21:03 2025: Appended file wspdd.grd had following \"history\" attribute:
Sat Jan 25 20:21:03 2025: ncrename -v z,WSPD_Descending wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a standard_name,z,c,c,wind_speed wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a ioos_category,z,c,c,Wind wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a variable_info,z,c,c,10-meter Surface Wind Speed, Descending Passes wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a coordsys,z,c,c,geographic wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a units,z,c,c,m s-1 wspdd.grd
Sat Jan 25 20:21:03 2025: ncatted -a long_name,z,m,c,Surface Wind Speed, Descending Passes wspdd.grd
xyz2grd -As -Rd -I0.25 -r -: wspdd.txt -Gwspdd.grd
Sat Jan 25 20:21:02 2025: Appended file vwndd.grd had following \"history\" attribute:
Sat Jan 25 20:21:02 2025: ncrename -v z,vwnd_Descending vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a standard_name,z,c,c,northward_wind vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a ioos_category,z,c,c,Wind vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a variable_info,z,c,c,10-meter Meridional Wind, Descending Passes vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a coordsys,z,c,c,geographic vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a units,z,c,c,m s-1 vwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a long_name,z,m,c,Meridional Wind vwndd.grd
xyz2grd -As -Rd -I0.25 -r -: vwndd.txt -Gvwndd.grd
Sat Jan 25 20:21:02 2025: Appended file uwndd.grd had following \"history\" attribute:
Sat Jan 25 20:21:02 2025: ncrename -v z,uwnd_Descending uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a standard_name,z,c,c,eastward_wind uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a ioos_category,z,c,c,Wind uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a variable_info,z,c,c,10-meter Zonal Wind, Descending Passes uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a coordsys,z,c,c,geographic uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a units,z,c,c,m s-1 uwndd.grd
Sat Jan 25 20:21:02 2025: ncatted -a long_name,z,m,c,Zonal Wind uwndd.grd
xyz2grd -As -Rd -I0.25 -r -: uwndd.txt -Guwndd.grd
Sat Jan 25 20:21:02 2025: Appended file timea.grd had following \"history\" attribute:
Sat Jan 25 20:21:02 2025: ncrename -v z,Time_Ascending timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a ioos_category,z,c,c,Time timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a standard_name,z,c,c,not defined timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a variable_info,z,c,c,Hour of the Day, Ascending Passes timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a coordsys,z,c,c,geographic timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a units,z,c,c,hour timea.grd
Sat Jan 25 20:21:02 2025: ncatted -a long_name,z,m,c,Decimal Hour of the Day, Ascending Passes timea.grd
xyz2grd -As -Rd -I0.25 -r -: timea.txt -Gtimea.grd
Sat Jan 25 20:21:02 2025: Appended file rainfa.grd had following \"history\" attribute:
Sat Jan 25 20:21:02 2025: ncrename -v z,Rain_Flag_Ascending rainfa.grd
Sat Jan 25 20:21:02 2025: ncatted -a comment,z,c,c,0=no rain, 1=rain rainfa.grd
Sat Jan 25 20:21:02 2025: ncatted -a ioos_category,z,c,c,Quality rainfa.grd
Sat Jan 25 20:21:02 2025: ncatted -a variable_info,z,c,c,Rain Flag, Ascending Passes rainfa.grd
Sat Jan 25 20:21:02 2025: ncatted -a coordsys,z,c,c,geographic rainfa.grd
Sat Jan 25 20:21:01 2025: ncatted -a long_name,z,m,c,Rain Flag, Ascending Passes rainfa.grd
xyz2grd -As -Rd -I0.25 -r -: rainfa.txt -Grainfa.grd
Sat Jan 25 20:21:01 2025: Appended file wspda.grd had following \"history\" attribute:
Sat Jan 25 20:21:01 2025: ncrename -v z,WSPD_Ascending wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a standard_name,z,c,c,wind_speed wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a ioos_category,z,c,c,Wind wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a variable_info,z,c,c,10-meter Surface Wind Speed, Ascending Passes wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a coordsys,z,c,c,geographic wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a units,z,c,c,m s-1 wspda.grd
Sat Jan 25 20:21:01 2025: ncatted -a long_name,z,m,c,Surface Wind Speed, Ascending Passes wspda.grd
xyz2grd -As -Rd -I0.25 -r -: wspda.txt -Gwspda.grd
Sat Jan 25 20:21:01 2025: Appended file vwnda.grd had following \"history\" attribute:
Sat Jan 25 20:21:01 2025: ncrename -v z,vwnd_Ascending vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a standard_name,z,c,c,northward_wind vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a ioos_category,z,c,c,Wind vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a variable_info,z,c,c,10-meter Meridional Wind, Ascending Passes vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a coordsys,z,c,c,geographic vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a units,z,c,c,m s-1 vwnda.grd
Sat Jan 25 20:21:01 2025: ncatted -a long_name,z,m,c,Meridional Wind vwnda.grd
xyz2grd -As -Rd -I0.25 -r -: vwnda.txt -Gvwnda.grd";
    String infoUrl "https://cwcgom.aoml.noaa.gov/thredds/dodsC/ASCAT/METOPB.nc.html";
    String institution "NOAA";
    String keywords "advanced, ascat, ascending, atmosphere, atmospheric, daily, data, day, decimal, defined, descending, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, eastward, eastward_wind, environmental, eumetsat, european, exploitation, flag, hour, information, meridional, meteorological, metop, metop-b, national, nesdis, noaa, northward, northward_wind, not, not defined, organisation, passes, precipitation, products, quality, rain, Rain_Flag_Ascending, Rain_Flag_Descending, rainfall, satellite, satellites, scatterometer, service, speed, surface, time, Time_Ascending, Time_Descending, uwnd_Ascending, uwnd_Descending, vwnd_Ascending, vwnd_Descending, wind, wind_speed, winds, WSPD_Ascending, WSPD_Descending, zonal";
    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.";
    Int32 nco_openmp_thread_number 1;
    Float64 Northernmost_Northing 89.875;
    String source_data "NOAA/NESDIS";
    String sourceUrl "https://cwcgom.aoml.noaa.gov/thredds/dodsC/ASCAT/METOPB.nc";
    Float64 Southernmost_Northing -89.875;
    String spatial_resolution "0.25 degrees";
    String standard_name_vocabulary "CF Standard Name Table v32";
    String summary "The Advanced SCATterometer (ASCAT) ocean surface winds are a 10 meter neutral stability wind. These products are processed by NOAA/National Environmental Satellite, Data, and Information Service (NESDIS) utilizing measurements from ASCAT aboard the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) METOP satellite. The current geophysical model function (GMF) being used is CMOD5.5, where the GMF relates the normalized radar cross-section to the ocean surface wind speed and direction. All dates and times are Coordinated Universal Time (UTC), also known as Greenwich Mean Time (GMT), Zulu Time (UT), and World Time.";
    Float64 temporal_extent 86400.0;
    String temporal_extent_unit "seconds";
    String time_coverage_end "2025-01-26T12:00:00Z";
    String time_coverage_start "2020-01-01T12:00:00Z";
    String title "METOP-B ASCAT daily products";
    Float64 Westernmost_Easting -179.875;
  }
}

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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.