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Dataset Title:  OSCAR Sea Surface Velocity, 1/3°, L4, Global, 1992-present, 5 Day Composite Subscribe RSS
Institution:  ESR   (Dataset ID: jplOscar)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      1734    5 days 2h 36m 13s (uneven)
  < slider >
 depth (m) ?      1    (just one value)
  < slider >
 latitude (degrees_north) ?      481    -0.3333333 (even)
  < slider >
 longitude (degrees_east) ?      1201    0.3333333 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 u (Ocean Surface Zonal Currents, meter/sec) ?
 v (Ocean Surface Meridional Currents, meter/sec) ?
 um (Ocean Surface Zonal Currents Maximum Mask, meter/sec) ?
 vm (Ocean Surface Meridional Currents Maximum Mask, meter/sec) ?

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 7.196256e+8, 1.4845248e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Day since 1992-10-05 00:00:00";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 15.0, 15.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -80.0, 80.0;
    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 20.0, 420.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  u {
    String ioos_category "Currents";
    String long_name "Ocean Surface Zonal Currents";
    Float64 missing_value NaN;
    String units "meter/sec";
  }
  v {
    String ioos_category "Currents";
    String long_name "Ocean Surface Meridional Currents";
    Float64 missing_value NaN;
    String units "meter/sec";
  }
  um {
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String comment "Maximum Mask velocity is the geostrophic component at all points + any concurrent Ekman and buoyancy components.";
    String ioos_category "Currents";
    String long_name "Ocean Surface Zonal Currents Maximum Mask";
    Float64 missing_value NaN;
    String units "meter/sec";
  }
  vm {
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String comment "Maximum Mask velocity is the geostrophic component at all points + any concurrent Ekman and buoyancy components.";
    String ioos_category "Currents";
    String long_name "Ocean Surface Meridional Currents Maximum Mask";
    Float64 missing_value NaN;
    String units "meter/sec";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String company "Earth & Space Research, Seattle, WA";
    String contact "Kathleen Dohan (kdohan@esr.org) or John T. Gunn (gunn@esr.org)";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "kdohan@esr.org";
    String creator_name "K Dohan";
    String creator_type "person";
    String creator_url "https://www.esr.org";
    String datasubtype "unfiltered";
    String datatype "1/72 YEAR Interval";
    String defaultGraphQuery "&.draw=vectors";
    Float64 Easternmost_Easting 420.0;
    Float64 geospatial_lat_max 80.0;
    Float64 geospatial_lat_min -80.0;
    Float64 geospatial_lat_resolution 0.3333333333333333;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 420.0;
    Float64 geospatial_lon_min 20.0;
    Float64 geospatial_lon_resolution 0.3333333333333333;
    String geospatial_lon_units "degrees_east";
    String history 
"Principal Investigator: Kathleen Dohan (kdohan@esr.org). Co-Investigator: Gary Lagerloef (lager@esr.org).
2018-07-19T11:53:37Z https://thredds.jpl.nasa.gov/thredds/dodsC/ocean_circulation/ALL_OSCAR_L4_OC_third-deg.nc
2018-07-19T11:53:37Z http://coastwatch.pfeg.noaa.gov/erddap/griddap/jplOscar.das";
    String infoUrl "https://www.esr.org/research/oscar/oscar-surface-currents/";
    String institution "ESR";
    String keywords "all, currents, data, degree, depth, esr, global, L4, latitude, longitude, mask, maximum, meridional, ocean, oscar, present, sea, surface, third, third-deg, time, u, v, velocity, zonal";
    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 80.0;
    String references "Bonjean F. and G.S.E. Lagerloef, 2002 ,Diagnostic model and analysis of the surface currents in the tropical Pacific ocean, J. Phys. Oceanogr., 32, 2,938-2,954";
    String source "Gary Lagerloef, ESR (lager@esr.org) and Kathleen Dohan, ESR (kdohan@esr.org)";
    String sourceUrl "https://thredds.jpl.nasa.gov/thredds/dodsC/ocean_circulation/ALL_OSCAR_L4_OC_third-deg.nc";
    Float64 Southernmost_Northing -80.0;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary 
"Ocean Surface Current Analyses Real-time (OSCAR) is a NASA funded research project and global surface current database. OSCAR global ocean surface mixed layer velocities are calculated from satellite-sensed sea surface height gradients, ocean vector winds, and sea surface temperature fields using geostrophy, Ekman, and thermal wind dynamics. OSCAR's continuing improvement depends on better modeling of the momentum transfer both within and across the boundaries of the turbulent mixed layer. A main research objective of the OSCAR project is to improve the generation of surface currents by ocean vector winds, and in doing so further our understanding of the mechanisms behind the transfer of momentum between the atmosphere and the ocean through the planetary boundary layer. Surface currents are provided on global grid every ~5 days, dating from 1992 to present day, with daily updates and near-real-time availability. 
* Principal Investigator: Kathleen Dohan (kdohan@esr.org). Co-Investigator: Gary Lagerloef (lager@esr.org).        
* Maximum Mask velocity is the geostrophic component at all points + any concurrent Ekman and buoyancy components.
* Longitude extends from 20 E to 420 E to avoid a break in major ocean basins. Data repeats in overlap region.";
    String time_coverage_end "2017-01-16T00:00:00Z";
    String time_coverage_start "1992-10-21T00:00:00Z";
    String title "OSCAR Sea Surface Velocity, 1/3°, L4, Global, 1992-present, 5 Day Composite";
    String variable "Ocean Surface Currents";
    Float32 version 2009.0;
    Float64 Westernmost_Easting 20.0;
  }
}

 

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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