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Dataset Title:  Drifter track data from drifters deployed on multiple R/V Endeavor, Albatross
IV, Oceanus, Delaware, Cape Hatteras, Parizeau, and CCGS Cygnus cruises in the
Gulf of Maine and Georges Bank from 1995-1999 (GLOBEC)
Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_3660)
Range: longitude = -77.139 to -13.247°E, latitude = 21.036 to 53.623°N, time = 1995-01-01T06:01:54Z to 1999-07-08T20:59:06Z
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  year_start {
    Int16 _FillValue 32767;
    Int16 actual_range 1995, 1999;
    String description "Year that the drifter was initially deployed (e.g. 1995).";
    String ioos_category "Time";
    String long_name "Year Start";
    String units "dimensionless";
  drifterid {
    String description "Drifter identification number. 'g' = drifter initially deployed in US water; 'n' = drifter deployed in Canadian waters by the Bedford Institute of Oceanography.";
    String ioos_category "Unknown";
    String long_name "Drifterid";
    String units "dimensionless";
  argosid {
    Int16 _FillValue 32767;
    Int16 actual_range 3012, 24976;
    String description "ARGOS drifter identification number.";
    String ioos_category "Unknown";
    String long_name "Argosid";
    String units "dimensionless";
  cruiseid {
    String description "Identification number of the cruise on which the drifter was initially deployed (e.g. OC302 = R/V Oceanus cruise number 302). 'nd' = cruiseid unknown.";
    String ioos_category "Unknown";
    String long_name "Cruiseid";
    String units "dimensionless";
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 21.036, 53.623;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude in decimal degrees; positive = North.";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -77.139, -13.247;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude in decimal degrees; negative = West.";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  temp {
    Float32 _FillValue NaN;
    Float32 actual_range -5.0, 46.15;
    String description "Water temperature.";
    String ioos_category "Temperature";
    String long_name "Temperature";
    Float32 missing_value 99.0;
    String units "degrees Celsius";
  submergence {
    Float32 _FillValue NaN;
    Float32 actual_range -1.16, 2547.57;
    String description "Tension value between surface float and drogue.";
    String ioos_category "Unknown";
    String long_name "Submergence";
    String units "unknown";
  yrday_gmt {
    Float32 _FillValue NaN;
    Float32 actual_range 1.0636, 365.9906;
    String description "Day of the year and decimal time (01 to 366); calculated from the original column 'yrday_special' (year day since 01/01/95).";
    String ioos_category "Unknown";
    String long_name "Yrday Gmt";
    String units "dimensionless";
  year {
    Int16 _FillValue 32767;
    Int16 actual_range 1995, 1999;
    String description "Year, in YYYY format (e.g. 1996).";
    String ioos_category "Time";
    String long_name "Year";
    String units "dimensionless";
  month_gmt {
    String description "Month of the year (01 to 12), in MM format.";
    String ioos_category "Time";
    String long_name "Month Gmt";
    String units "dimensionless";
  day_gmt {
    String description "Day of the month (0 to 30), in DD format.";
    String ioos_category "Time";
    String long_name "Day Gmt";
    String units "dimensionless";
  time_gmt {
    String description "Time of day (24 hour clock), including decimal minutes.";
    String ioos_category "Time";
    String long_name "Time Gmt";
    String units "dimensionless";
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 7.88940114e+8, 9.31467546e+8;
    String axis "T";
    String description "Date and time (UTC) formatted to ISO8601 standard. T indicates start of time string; Z indicates UTC.";
    String ioos_category "Time";
    String long_name "ISO Date Time UTC";
    String source_name "ISO_DateTime_UTC";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"The status of drogue presence is indicated by timing the submergence of the
surface float. When the drogue is attached, its drag will cause the surface
sphere to submerge occasionally as a wave passes. If the drogue has been lost,
the surface sphere remains at the surface and is not buried by waves. When the
surface float submerges, contacts on top of the sphere are shorted out by the
seawater and the PTT controller starts counting the length of time (seconds)
the contacts are shorted. Every 30 minutes the accumulated submergence time is
scaled by 0.1 (for example, 1000 seconds is scaled to 100) and loaded into the
first byte of the data string and a new submergence time is started. Typical
submergence values are 10 to 100. Consistent submergence values of 0 indicate
the drogue has been lost. The maximum submergence value is 180 and indicates
the surface float is sinking, or heavily fouled.
Those drifters with identifications starting with a \\\"g\\\" were generally
deployed in US territorial waters and those with an \\\"n\\\" deployed in Canadian
waters by the Bedford Institute of Oceanography.";
    String awards_0_award_nid "54610";
    String awards_0_award_number "unknown GB NSF";
    String awards_0_funder_name "National Science Foundation";
    String awards_0_funding_acronym "NSF";
    String awards_0_funding_source_nid "350";
    String awards_0_program_manager "Dr David  L. Garrison";
    String awards_0_program_manager_nid "50534";
    String awards_1_award_nid "54626";
    String awards_1_award_number "unknown GB NOAA";
    String awards_1_funder_name "National Oceanic and Atmospheric Administration";
    String awards_1_funding_acronym "NOAA";
    String awards_1_funding_source_nid "352";
    String cdm_data_type "Other";
    String comment 
"Drifter Location Data 
 GLOBEC Georges Bank, 1995-1999 
  Contributer: Richard Limeburner (WHOI) 
 Modified by BCO-DMO 05-24-12: re-structured data, added yrday_gmt,  
  cruiseid, and argosid.";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.2d  13 Jun 2019";
    String date_created "2012-05-25T20:08:29Z";
    String date_modified "2019-02-01T16:50:16Z";
    String defaultDataQuery "&time";
    String doi "10.1575/1912/bco-dmo.3660.1";
    Float64 Easternmost_Easting -13.247;
    Float64 geospatial_lat_max 53.623;
    Float64 geospatial_lat_min 21.036;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -13.247;
    Float64 geospatial_lon_min -77.139;
    String geospatial_lon_units "degrees_east";
    String history 
"2019-10-15T07:31:12Z (local files)
2019-10-15T07:31:12Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_3660.das";
    String infoUrl "https://www.bco-dmo.org/dataset/3660";
    String institution "BCO-DMO";
    String instruments_0_acronym "BDFT";
    String instruments_0_dataset_instrument_nid "5630";
    String instruments_0_description "Drifter buoy to include the Beardsley Drifter.  Generic drifter buoys may be surface or sub-surface buoys that move with the current.  They have a variety of instruments attached, providing a platform that allows for the measurement of surface drifts, air pressure and other variables.  The Beardsley Drifters  are near-surface satellite-tracked drifters used for observations of circulation patterns.  They are WOCE-style drifters featuring holey sock drogues. Each drifter has a small (~ 30 cm diameter) surface float with ARGOS transmitter and batteries tethered to a holey sock drogue centered at 15 m below the surface. The drogue, about 10 m tall and 1 m in diameter, is designed to \"lock\" itself to the water so that the surface float follows the mean water motion at 15 m depth with very little slippage even in high winds. Thus measuring the drifter's position as a function of time provides a Lagrangian measurement of the 15-m ocean current. (http://globec.whoi.edu/jg/info/globec/soglobec/drifters_argos%7Bdir=globec.whoi.edu/jg/dir/globec/soglobec/,data=globec.whoi.edu:80/jg/serv/globec/soglobec/drifters_argos.html1%7D?)   WOCE-drifters: https://www.nodc.noaa.gov/woce/woce_v3/wocedata_1/diu_summaries/svp/index.htm";
    String instruments_0_instrument_name "Drifter Buoy";
    String instruments_0_instrument_nid "424";
    String instruments_0_supplied_name "Drifter Buoy";
    String keywords "argosid, bco, bco-dmo, biological, chemical, cruiseid, data, dataset, date, day, day_gmt, dmo, drifterid, erddap, iso, latitude, longitude, management, month, month_gmt, oceanography, office, preliminary, start, submergence, temperature, time, time_gmt, year, year_start, yrday, yrday_gmt";
    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 metadata_source "https://www.bco-dmo.org/api/dataset/3660";
    Float64 Northernmost_Northing 53.623;
    String param_mapping "{'3660': {'lat': 'master - latitude', 'lon': 'master - longitude', 'ISO_DateTime_UTC': 'master - time'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/3660/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Dr Richard Limeburner";
    String people_0_person_nid "50423";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Shannon Rauch";
    String people_1_person_nid "51498";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "U.S. GLOBEC Georges Bank";
    String projects_0_acronym "GB";
    String projects_0_description 
"The U.S. GLOBEC Georges Bank Program is a large multi- disciplinary multi-year oceanographic effort. The proximate goal is to understand the population dynamics of key species on the Bank - Cod, Haddock, and two species of zooplankton (Calanus finmarchicus and Pseudocalanus) - in terms of their coupling to the physical environment and in terms of their predators and prey. The ultimate goal is to be able to predict changes in the distribution and abundance of these species as a result of changes in their physical and biotic environment as well as to anticipate how their populations might respond to climate change.
The effort is substantial, requiring broad-scale surveys of the entire Bank, and process studies which focus both on the links between the target species and their physical environment, and the determination of fundamental aspects of these species' life history (birth rates, growth rates, death rates, etc).
Equally important are the modelling efforts that are ongoing which seek to provide realistic predictions of the flow field and which utilize the life history information to produce an integrated view of the dynamics of the populations.
The U.S. GLOBEC Georges Bank Executive Committee (EXCO) provides program leadership and effective communication with the funding agencies.";
    String projects_0_geolocation "Georges Bank, Gulf of Maine, Northwest Atlantic Ocean";
    String projects_0_name "U.S. GLOBEC Georges Bank";
    String projects_0_project_nid "2037";
    String projects_0_project_website "http://globec.whoi.edu/globec_program.html";
    String projects_0_start_date "1991-01";
    String publisher_name "Shannon Rauch";
    String publisher_role "BCO-DMO Data Manager(s)";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 21.036;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Drifter track data from drifters deployed on multiple R/V Endeavor, Albatross IV,  Oceanus, Delaware, Cape Hatteras, Parizeau, and CCGS Cygnus cruises in the Gulf of Maine and Georges Bank from 1995-1999. Satellite-tracked drifters with holey sock drogues centered at 10, 15 and 40-m depths were deployed over Georges Bank during 1995-99 in support of the U.S. GLOBEC/Georges Bank Program.";
    String time_coverage_end "1999-07-08T20:59:06Z";
    String time_coverage_start "1995-01-01T06:01:54Z";
    String title "Drifter track data from drifters deployed on multiple R/V Endeavor, Albatross IV,  Oceanus, Delaware, Cape Hatteras, Parizeau, and CCGS Cygnus cruises in the Gulf of Maine and Georges Bank from 1995-1999 (GLOBEC)";
    String version "1";
    Float64 Westernmost_Easting -77.139;
    String xml_source "osprey2erddap.update_xml() v1.5-beta";


Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection 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.

Tabledap request URLs must be in the form
For example,
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

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