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Dataset Title:	Glider deployment #231 - shad 2026-09-09 (realtime)
Institution:	Transport Canada   (Dataset ID: shad_20260909_231_realtime)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
trajectory (Trajectory/Deployment Name)	!= =~ <= >= = < >		!= =~ <= >= = < >		""	""
row	!= =~ <= >= = < >		!= =~ <= >= = < >		0	106
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2026-09-09T11:43:27Z	2026-09-27T15:54:24Z
depth (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.002724519930779934	254.54800415039062
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		48.855042	49.26802
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.981647	-62.981607
c_battpos (inch)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.8999999761581421	0.8999999761581421
c_de_oil_vol (cc)	!= =~ <= >= = < >		!= =~ <= >= = < >		-400.0	430.0
c_fin (Commanded fin position, rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.44999998807907104	0.44999998807907104
c_heading (rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0030982799362391233	6.281149864196777
c_pitch (Commanded platform pitch, rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.4189000129699707	0.4537999927997589
c_thruster_on (Commanded thruster use, percent)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	40.87139892578125
c_wpt_lat (degree decimal minutes)	!= =~ <= >= = < >		!= =~ <= >= = < >		48.506705	49.258857
c_wpt_lon (degree decimal minutes)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.974757	-62.018098
m_argos_is_xmitting (Argos transmitting status, bool)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	1
m_battery (Glider battery voltage, volts)	!= =~ <= >= = < >		!= =~ <= >= = < >		14.04010009765625	15.144000053405762
m_battpos (inch)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.9004759788513184	0.9451109766960144
m_bms_aft_current (instantaneous aft current, amps)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0012499999720603228	2.592829942703247
m_bms_ebay_current (amps)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	1.7996799945831299
m_bms_pitch_current (amps)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.019999999552965164	1.7790600061416626
m_coulomb_amphr_total (ah)	!= =~ <= >= = < >		!= =~ <= >= = < >		13.033699989318848	111.55599975585938
m_depth (Depth, m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	254.54800415039062
m_depth_rate_avg_final (m s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.5089259743690491	0.21108099818229675
m_de_oil_vol (cc)	!= =~ <= >= = < >		!= =~ <= >= = < >		-397.99200439453125	431.5090026855469
m_digifin_leakdetect_reading (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		1011.0	1023.0
m_fin (Measured fin angle, rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.4573509991168976	0.4515160024166107
m_gps_lat (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		48.855042	49.26802
m_gps_lon (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.981647	-62.981607
m_gps_status (GPS status, enum)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	2
m_heading (rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	6.281439781188965
m_lat (degree decimal minutes)	!= =~ <= >= = < >		!= =~ <= >= = < >		48.855042	49.269149
m_leakdetect_voltage (volts)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.481260061264038	2.4872100353240967
m_leakdetect_voltage_forward (volts)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.4828100204467773	2.489259958267212
m_leakdetect_voltage_science (volts)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.483520030975342	2.4900500774383545
m_lon (degree decimal minutes)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.9801	-62.978469
m_pitch (rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.7033680081367493	0.8482300043106079
m_roll (rad)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.12740899622440338	0.7504919767379761
m_thruster_power (watt)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	3.3348000049591064
m_vacuum (InHg)	!= =~ <= >= = < >		!= =~ <= >= = < >		7.792719841003418	10.306099891662598
m_veh_temp (degree_C)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.759269952774048	17.200300216674805
m_water_depth (Seafloor depth, m)	!= =~ <= >= = < >		!= =~ <= >= = < >		-1.0	250.0570068359375
sci_dmon_msg_byte_count	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	50120.0
sci_m_present_secs_into_mission	!= =~ <= >= = < >		!= =~ <= >= = < >		6.826000213623047	1292440.0
sci_m_present_time (epoch time (glider), s)	!= =~ <= >= = < >		!= =~ <= >= = < >		1.788954256E9	1.79052446616E9
conductivity	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	3.59237003326416
sci_water_pressure	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.003280000062659383	25.587799072265625
temperature (degree_C)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.20469999313354492	14.967399597167969
pressure (Sea Water Pressure, dbar)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.03280000016093254	255.87799072265625
salinity (PSU)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	34.59313371655512
density	!= =~ <= >= = < >		!= =~ <= >= = < >		999.8444641620168	1028.3642497135747
crs (1)	!= =~ <= >= = < >		!= =~ <= >= = < >
lat_uv (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		49.037592	49.246652
lon_uv (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.938937	-63.42527
profile_id (1)	!= =~ <= >= = < >		!= =~ <= >= = < >		1788954207	1790522759
profile_lat (Profile Latitude, degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		48.855165919950984	49.26801479671401
profile_lon (Profile Longitude, degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.98158720910035	-62.98168644161428
profile_time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2026-09-09T11:51:52Z	2026-09-27T15:42:15Z
time_uv (Depth-Averaged Time, UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2026-09-09T12:38:34Z	2026-09-12T01:33:00Z
u (m.s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.012301299721002579	0.11304300278425217
v (m.s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.0845905989408493	-0.05117940157651901
instrument_CTD (RBR Legato3 CTD, 1)	!= =~ <= >= = < >		!= =~ <= >= = < >
instrument_bpump (1)	!= =~ <= >= = < >		!= =~ <= >= = < >
instrument_hydrophones (1)	!= =~ <= >= = < >		!= =~ <= >= = < >
instrument_thruster (1)	!= =~ <= >= = < >		!= =~ <= >= = < >

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" trajectory row time depth latitude longitude c_battpos c_de_oil_vol c_fin c_heading c_pitch c_thruster_on c_wpt_lat c_wpt_lon m_argos_is_xmitting m_battery m_battpos m_bms_aft_current m_bms_ebay_current m_bms_pitch_current m_coulomb_amphr_total m_depth m_depth_rate_avg_final m_de_oil_vol m_digifin_leakdetect_reading m_fin m_gps_lat m_gps_lon m_gps_status m_heading m_lat m_leakdetect_voltage m_leakdetect_voltage_forward m_leakdetect_voltage_science m_lon m_pitch m_roll m_thruster_power m_vacuum m_veh_temp m_water_depth sci_dmon_msg_byte_count sci_m_present_secs_into_mission sci_m_present_time conductivity sci_water_pressure temperature pressure salinity density crs lat_uv lon_uv profile_id profile_lat profile_lon profile_time time_uv u v instrument_CTD instrument_bpump instrument_hydrophones instrument_thruster trajectory row time depth latitude longitude c_battpos c_de_oil_vol c_fin c_heading c_pitch c_thruster_on c_wpt_lat c_wpt_lon m_argos_is_xmitting m_battery m_battpos m_bms_aft_current m_bms_ebay_current m_bms_pitch_current m_coulomb_amphr_total m_depth m_depth_rate_avg_final m_de_oil_vol m_digifin_leakdetect_reading m_fin m_gps_lat m_gps_lon m_gps_status m_heading m_lat m_leakdetect_voltage m_leakdetect_voltage_forward m_leakdetect_voltage_science m_lon m_pitch m_roll m_thruster_power m_vacuum m_veh_temp m_water_depth sci_dmon_msg_byte_count sci_m_present_secs_into_mission sci_m_present_time conductivity sci_water_pressure temperature pressure salinity density crs lat_uv lon_uv profile_id profile_lat profile_lon profile_time time_uv u v instrument_CTD instrument_bpump instrument_hydrophones instrument_thruster trajectory row time depth latitude longitude c_battpos c_de_oil_vol c_fin c_heading c_pitch c_thruster_on c_wpt_lat c_wpt_lon m_argos_is_xmitting m_battery m_battpos m_bms_aft_current m_bms_ebay_current m_bms_pitch_current m_coulomb_amphr_total m_depth m_depth_rate_avg_final m_de_oil_vol m_digifin_leakdetect_reading m_fin m_gps_lat m_gps_lon m_gps_status m_heading m_lat m_leakdetect_voltage m_leakdetect_voltage_forward m_leakdetect_voltage_science m_lon m_pitch m_roll m_thruster_power m_vacuum m_veh_temp m_water_depth sci_dmon_msg_byte_count sci_m_present_secs_into_mission sci_m_present_time conductivity sci_water_pressure temperature pressure salinity density crs lat_uv lon_uv profile_id profile_lat profile_lon profile_time time_uv u v instrument_CTD instrument_bpump instrument_hydrophones instrument_thruster trajectory row time depth latitude longitude c_battpos c_de_oil_vol c_fin c_heading c_pitch c_thruster_on c_wpt_lat c_wpt_lon m_argos_is_xmitting m_battery m_battpos m_bms_aft_current m_bms_ebay_current m_bms_pitch_current m_coulomb_amphr_total m_depth m_depth_rate_avg_final m_de_oil_vol m_digifin_leakdetect_reading m_fin m_gps_lat m_gps_lon m_gps_status m_heading m_lat m_leakdetect_voltage m_leakdetect_voltage_forward m_leakdetect_voltage_science m_lon m_pitch m_roll m_thruster_power m_vacuum m_veh_temp m_water_depth sci_dmon_msg_byte_count sci_m_present_secs_into_mission sci_m_present_time conductivity sci_water_pressure temperature pressure salinity density crs lat_uv lon_uv profile_id profile_lat profile_lon profile_time time_uv u v instrument_CTD instrument_bpump instrument_hydrophones instrument_thruster trajectory row time depth latitude longitude c_battpos c_de_oil_vol c_fin c_heading c_pitch c_thruster_on c_wpt_lat c_wpt_lon m_argos_is_xmitting m_battery m_battpos m_bms_aft_current m_bms_ebay_current m_bms_pitch_current m_coulomb_amphr_total m_depth m_depth_rate_avg_final m_de_oil_vol m_digifin_leakdetect_reading m_fin m_gps_lat m_gps_lon m_gps_status m_heading m_lat m_leakdetect_voltage m_leakdetect_voltage_forward m_leakdetect_voltage_science m_lon m_pitch m_roll m_thruster_power m_vacuum m_veh_temp m_water_depth sci_dmon_msg_byte_count sci_m_present_secs_into_mission sci_m_present_time conductivity sci_water_pressure temperature pressure salinity density crs lat_uv lon_uv profile_id profile_lat profile_lon profile_time time_uv u v instrument_CTD instrument_bpump instrument_hydrophones instrument_thruster ")

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  trajectory {
    String cf_role "trajectory_id";
    String comment "A trajectory is a single deployment of a glider and may span multiple data files.";
    String ioos_category "Identifier";
    String long_name "Trajectory/Deployment Name";
  }
  row {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 106;
    String ioos_category "Unknown";
    String long_name "Row";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.788954207861999e+9, 1.790524464963999e+9;
    String axis "T";
    String calendar "gregorian";
    String comment "Measured or calculated time at each point in the time-series";
    String ioos_category "Time";
    String long_name "Time";
    String observation_type "measured";
    String sensor_identifier "time";
    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";
    Float64 _FillValue 0.0;
    Float64 actual_range 0.002724519930779934, 254.54800415039062;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String comment "depth is generate by both sci_water_pressure or m_water_pressure mixture";
    String ioos_category "Location";
    String long_name "Depth";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String positive "down";
    String sensor_identifier "depth";
    String standard_name "depth";
    String units "m";
    Float64 valid_max 2000.0;
    Float64 valid_min 0.0;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue 0.0;
    Float64 actual_range 48.855042, 49.26802;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Interpolated latitude at each point in the time-series";
    String ioos_category "Location";
    String long_name "Latitude";
    Float64 missing_value -9999.9;
    String observation_type "measured and interpolated";
    String platform "platform";
    String sensor_identifier "lat";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue 0.0;
    Float64 actual_range -63.981647, -62.981607;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Values may be interpolated between measured GPS fixes.";
    String ioos_category "Location";
    String long_name "Longitude";
    Float64 missing_value -9999.9;
    String observation_type "measured and interpolated";
    String platform "platform";
    String sensor_identifier "lon";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  c_battpos {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.8999999761581421, 0.8999999761581421;
    String comment "From Sensor c_battpos. Commanded position of the pitch battery relative to calibrated center (=0).   < 0 = Battery commanded aft  > 0 = Battery commanded forward";
    String instrument "bpump";
    String ioos_category "Unknown";
    String long_name "Commanded pitch battery position";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_battpos";
    String units "inch";
  }
  c_de_oil_vol {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -400.0, 430.0;
    String comment "From Sensor c_de_oil_vol. Commanded position of the ballast pump.";
    String instrument "bpump";
    String ioos_category "Unknown";
    String long_name "Commanded ballast pump oil volume";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_de_oil_vol";
    String units "cc";
  }
  c_fin {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.44999998807907104, 0.44999998807907104;
    String comment "From Senosr c_fin";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Commanded fin position";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_fin";
    String units "rad";
  }
  c_heading {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0030982799362391233, 6.281149864196777;
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Commanded platform orientation";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_heading";
    String units "rad";
  }
  c_pitch {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.4189000129699707, 0.4537999927997589;
    String comment "From Sensor c_pitch";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Commanded platform pitch";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_pitch";
    String units "rad";
  }
  c_thruster_on {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0, 40.87139892578125;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "From Sensor c_thruster_on. Commanded thruster power as a percentage, 0% off, 100% max power. If the thruster is running there will be additional noise";
    String instrument "thruster";
    String ioos_category "Unknown";
    String long_name "Commanded thruster use";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_thruster_on";
    String units "percent";
  }
  c_wpt_lat {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 48.506705, 49.258857;
    String comment "Glider's current waypoint ie latitude it intends to travel towards. Note, the units are in the Webb format DDMM.MMMM (>0 North   <0 South) with no space between degrees and minutes.";
    String instrument "flight computer";
    String ioos_category "Time";
    String long_name "Target waypoint latitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_wpt_lat";
    String units "degree decimal minutes";
  }
  c_wpt_lon {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -63.974757, -62.018098;
    String comment "Glider's current waypoint ie longitude it intends to travel towards. Note, the units are in the Webb format DDMM.MMMM (>0 East   <0 West) with no space between degrees and minutes.";
    String instrument "flight computer";
    String ioos_category "Time";
    String long_name "Target waypoint longitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "c_wpt_lon";
    String units "degree decimal minutes";
  }
  m_argos_is_xmitting {
    Byte _FillValue -127;
    String _Unsigned "false";
    Byte actual_range 0, 1;
    String comment "Is Argos Platform Transmitter Terminal (PTT) currently transmitting.   Boolean, 1 = yes, 0 = no";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Argos transmitting status";
    Byte missing_value -15;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_argos_is_xmitting";
    String units "bool";
  }
  m_battery {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 14.04010009765625, 15.144000053405762;
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum 0.0;
    String comment "From Sensor m_battery. Is a weighted average of past m_battery_inst and m_battery  m_battery = 0.1*m_battery_inst + 0.9*m_battery";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Glider battery voltage";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_battery";
    String units "volts";
    Float64 valid_max 17.0;
    Float64 valid_min 0.0;
  }
  m_battpos {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.9004759788513184, 0.9451109766960144;
    String comment "From Sensor m_battpos. Measured position of the pitch battery. Battery moves forward and aft along longitudinal axis of glider. This sensor makes noise when moving.";
    String instrument "bpump";
    String ioos_category "Unknown";
    String long_name "Measured pitch battery position";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_battpos";
    String units "inch";
  }
  m_bms_aft_current {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0012499999720603228, 2.592829942703247;
    String comment "From Sensor m_bms_aft_current. G3 BMS (battery management system) instantaneous measurement of amperage for aft battery pack.";
    String instrument "flight computer";
    String ioos_category "Currents";
    String long_name "instantaneous aft current";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_bms_aft_current";
    String units "amps";
  }
  m_bms_ebay_current {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0, 1.7996799945831299;
    String comment "From Sensor m_bms_ebay_current. G3 BMS (battery management system) instantaneous measurement of amperage for extended energy bay battery pack.";
    String instrument "flight computer";
    String ioos_category "Currents";
    String long_name "instantaneous energy bay current";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_bms_ebay_current";
    String units "amps";
  }
  m_bms_pitch_current {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.019999999552965164, 1.7790600061416626;
    String comment "From Sensor m_bms_pitch_current. G3 BMS (battery management system) instantaneous measurement of amperage for pitch battery pack.";
    String instrument "flight computer";
    String ioos_category "Currents";
    String long_name "instantaneous pitch current";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_bms_pitch_current";
    String units "amps";
  }
  m_coulomb_amphr_total {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 13.033699989318848, 111.55599975585938;
    Float64 colorBarMaximum 2000.0;
    Float64 colorBarMinimum 0.0;
    String comment "From Sensor m_coulomb_amphr_total. Total amp-hrs measured since last coulomb_amphr_total reset.";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Cumulative ampherehours consumed";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_coulomb_amphr_total";
    String units "ah";
    Float64 valid_max 1500.0;
    Float64 valid_min 0.0;
  }
  m_depth {
    Float64 _FillValue -9999.9;
    Float64 actual_range 0.0, 254.54800415039062;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String comment "Calculated glider depth fromglider's measured AD voltage from pressure transducer m_depth -> 0.1 bar/meter clips at 0.  Not meant to be very precise, not well temperature compensated.";
    String ioos_category "Location";
    String long_name "Depth";
    Float64 missing_value -9999.9;
    String platform "platform";
    String positive "down";
    String sensor_identifier "m_depth";
    String standard_name "depth";
    String units "m";
  }
  m_depth_rate_avg_final {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.5089259743690491, 0.21108099818229675;
    String comment "From Sensor m_depth_rate_avg_final.";
    String instrument "flight computer";
    String ioos_category "Currents";
    String long_name "Vertical speed";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_depth_rate_avg_final";
    String standard_name "platform_heave_rate_down";
    String units "m s-1";
  }
  m_de_oil_vol {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -397.99200439453125, 431.5090026855469;
    String comment "From Sensor m_de_oil_vol. Measured position of the ballast pump. This sensor makes noise when moving.";
    String instrument "bpump";
    String ioos_category "Unknown";
    String long_name "Measured ballast pump oil volume";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_de_oil_vol";
    String units "cc";
  }
  m_digifin_leakdetect_reading {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 1011.0, 1023.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "For platform health monitoring.  Instantaneous A/D reading from moisture sensor nested inside glider's fin.   1019 -> 1023 = dry fin compartment, <1019 is classified as possible leak, especially if sustained (minimum 5 sequential  low counts)";
    String instrument "flight computer";
    String ioos_category "Statistics";
    String long_name "Fin leak detect voltage";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_digifin_leakdetect_reading";
    String units "count";
  }
  m_fin {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.4573509991168976, 0.4515160024166107;
    String comment "From Sensor m_fin. Measured rudder position of the gliders fin.   <0 rudder left, >0 rudder right";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Measured fin angle";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_fin";
    String units "rad";
  }
  m_gps_lat {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 48.855042, 49.26802;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "From Sensor m_gps_lat. Measured by the GPS while the glider is at the surface  DDMM.MMMM   >0 ==> North   <0 ==> South";
    String instrument "flight computer";
    String ioos_category "Location";
    String long_name "GPS Fixed Latitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_gps_lat";
    String standard_name "latitude";
    String units "degrees_north";
  }
  m_gps_lon {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -63.981647, -62.981607;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "From Sensor m_gps_lon. DDMM.MMMM   >0 ==> East    <0 ==> West";
    String instrument "flight computer";
    String ioos_category "Location";
    String long_name "GPS Fixed Longitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_gps_lon";
    String standard_name "longitude";
    String units "degrees_east";
  }
  m_gps_status {
    Byte _FillValue -127;
    String _Unsigned "false";
    Byte actual_range 0, 2;
    String comment "Coded GPS Status based on quality of fix after GPS has received a line  0 = GPS_STATUS_VALID_FIX: No Complaints.  1 = GPS_STATUS_FIRST_IGNORED_VALID: Receive valid fixes but less than u_gps_req_valid_fixes,  2 = GPS_STATUS_INVALID_FIX: Got correctly interpreted fix with receiver warning,  3 = GPS_STATUS_WRONG_SENTENCE: Error interpreting gps sentences,     -2 = GPS_STATUS_BEST_GUESS_INVALID: Utilizing previous invalid fix as current fix,  -1 = GPS_STATUS_BEST_GUESS_IGNORED: Utilizing previous ignored fix as current fix";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "GPS status";
    Byte missing_value -15;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_gps_status";
    String units "enum";
  }
  m_heading {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0, 6.281439781188965;
    String comment "From Sensor m_heading. This is measured by the gliders attitude sensor. This is the compass heading of the glider";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Orientation (horizontal relative to magnetic north) of measurement platform";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_heading";
    String standard_name "platform_orientation";
    String units "rad";
  }
  m_lat {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 48.855042, 49.269149;
    String comment "Calculated latitude based on gliders dead reckoning. Useful when you glider is hitting waypoints underwater and turning to the next without surfacing. Note, the units are in the Webb format DDMM.MMMM (>0 North   <0 South) with no space between degrees and minutes.";
    String instrument "flight computer";
    String ioos_category "Time";
    String long_name "Dead reckoned platform latitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_lat";
    String units "degree decimal minutes";
  }
  m_leakdetect_voltage {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 2.481260061264038, 2.4872100353240967;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum 0.0;
    String comment "Glider's aft section leak detector.  2.5 - 2.0V = dry sensor  <2.0V = moisture between probes, lower voltage corresponds with more significant leak";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Leak detect voltage";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_leakdetect_voltage";
    String units "volts";
    Float64 valid_max 2.5;
    Float64 valid_min 0.0;
  }
  m_leakdetect_voltage_forward {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 2.4828100204467773, 2.489259958267212;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum 0.0;
    String comment "Glider's forward section leak detector.  2.5 - 2.0V = dry sensor  <2.0V = moisture between probes, lower voltage corresponds with more significant leak";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Forward leak detect voltage";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_leakdetect_voltage_forward";
    String units "volts";
    Float64 valid_max 2.5;
    Float64 valid_min 0.0;
  }
  m_leakdetect_voltage_science {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 2.483520030975342, 2.4900500774383545;
    Float64 colorBarMaximum 3.0;
    Float64 colorBarMinimum 0.0;
    String comment "Glider's payload bay leak detector.  2.5 - 2.0V = dry sensor  <2.0V = moisture between probes, lower voltage corresponds with more significant leak";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Payload leak detect voltage";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_leakdetect_voltage_science";
    String units "volts";
    Float64 valid_max 2.5;
    Float64 valid_min 0.0;
  }
  m_lon {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -63.9801, -62.978469;
    String comment "Calculated longitude based on gliders dead reckoning. Useful when you glider is hitting waypoints underwater and turning to the next without surfacing. Note, the units are in the Webb format DDMM.MMMM (>0 East <0 West) with no space between degrees and minutes.";
    String instrument "flight computer";
    String ioos_category "Time";
    String long_name "Dead reckoned platform longitude";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_lon";
    String units "degree decimal minutes";
  }
  m_pitch {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.7033680081367493, 0.8482300043106079;
    String comment "From Sensor m_pitch. This is measured by the gliders attitude sensor. Positive pitch is nose up, negative pitch is nose down.";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Orientation (pitch) of measurement platform by inclinometer";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_pitch";
    String standard_name "platform_pitch_angle";
    String units "rad";
  }
  m_roll {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -0.12740899622440338, 0.7504919767379761;
    String comment "From Sensor m_roll. This is measured by the gliders attitude sensor. Positive roll is starboard side down (clockwise), negative roll is starboard side up.";
    String instrument "flight computer";
    String ioos_category "Unknown";
    String long_name "Orientation (roll angle) or measurement platform by inclinometer";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_roll";
    String standard_name "platform_roll_angle";
    String units "rad";
  }
  m_thruster_power {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 0.0, 3.3348000049591064;
    String comment "From Sensor m_thruster_power. Measured thruster power consumption. This sensor makes noise when on.";
    String instrument "thruster";
    String ioos_category "Unknown";
    String long_name "Measured thruster power consumption";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_thruster_power";
    String units "watt";
  }
  m_vacuum {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 7.792719841003418, 10.306099891662598;
    String comment "Glider health monitoring parameter.  Pressure sensor measures glider's internal vacuum relative to atmospheric pressure at time when pressure sensor was calibrated. Internal vacuum holds glider components together.";
    String instrument "flight computer";
    String ioos_category "Pressure";
    String long_name "Internal pressure (vacuum)";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_vacuum";
    String units "InHg";
  }
  m_veh_temp {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range 2.759269952774048, 17.200300216674805;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    String comment "From Sensor m_veh_temp. Temperature inside glider, unsure of the accuracy, useful for diagnosing changes in vacuum.";
    String instrument "flight computer";
    String ioos_category "Temperature";
    String long_name "Internal temperature of the conductivity cell";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_veh_temp";
    String standard_name "sea_water_electrical_conductivity";
    String units "degree_C";
  }
  m_water_depth {
    Float64 _FillValue -2.147483647e+9;
    Float64 actual_range -1.0, 250.0570068359375;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String instrument "flight computer";
    String ioos_category "Hydrology";
    String long_name "Seafloor depth";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "m_water_depth";
    String standard_name "sea_floor_depth_below_sea_surface";
    String units "m";
  }
  sci_dmon_msg_byte_count {
    Float64 actual_range 0.0, 50120.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
  }
  sci_m_present_secs_into_mission {
    Float64 actual_range 6.826000213623047, 1292440.0;
    String ioos_category "Time";
  }
  sci_m_present_time {
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 1.788954256e+9, 1.79052446616e+9;
    String comment "epoch time in seconds from 1970";
    String instrument "science computer";
    String ioos_category "Time";
    String long_name "epoch time (glider)";
    Float64 missing_value -2.147483648e+9;
    String observation_type "measured";
    String platform "shad";
    String sensor_identifier "sci_m_present_time";
    String units "s";
  }
  conductivity {
    Float64 actual_range 0.0, 3.59237003326416;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    String ioos_category "Salinity";
  }
  sci_water_pressure {
    Float64 actual_range -0.003280000062659383, 25.587799072265625;
    Float64 colorBarMaximum 5000.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Pressure";
  }
  temperature {
    Float64 actual_range -0.20469999313354492, 14.967399597167969;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String units "degree_C";
  }
  pressure {
    Float64 _FillValue -9999.9;
    Float64 actual_range -0.03280000016093254, 255.87799072265625;
    Float64 colorBarMaximum 5000.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Pressure";
    String long_name "Sea Water Pressure";
    Float64 missing_value -9999.9;
    String observation_type "measured";
    String platform "platform";
    String positive "down";
    String sensor_identifier "pressure";
    String standard_name "sea_water_pressure";
    String units "dbar";
    Float64 valid_max 2000.0;
    Float64 valid_min 0.0;
  }
  salinity {
    Float64 actual_range 0.0, 34.59313371655512;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String ioos_category "Salinity";
    String units "PSU";
  }
  density {
    Float64 actual_range 999.8444641620168, 1028.3642497135747;
    Float64 colorBarMaximum 28.0;
    Float64 colorBarMinimum 20.0;
    String ioos_category "Salinity";
  }
  crs {
    Int32 _FillValue -2147483647;
    String epsg_code "EPSG:4326";
    String grid_mapping_name "latitude_longitude";
    Float64 inverse_flattening 298.257223563;
    String ioos_category "Other";
    String long_name "http://www.opengis.net/def/crs/EPSG/0/4326";
    Float64 semi_major_axis 6378137.0;
    String units "1";
  }
  lat_uv {
    Float64 _FillValue -9999.9;
    Float64 actual_range 49.037592, 49.246652;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Location";
    String long_name "Depth Averaged Latitude";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "lat_uv";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  lon_uv {
    Float64 _FillValue -9999.9;
    Float64 actual_range -63.938937, -63.42527;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Location";
    String long_name "Depth Averaged Longitude";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String sensor_identifier "lon_uv";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  profile_id {
    Int32 _FillValue -9999;
    Int32 actual_range 1788954207, 1790522759;
    String cf_role "profile_id";
    Float64 colorBarMaximum 2.5e+9;
    Float64 colorBarMinimum 0.0;
    String comment "Sequential profile number within the trajectory.  This value is unique in each file that is part of a single trajectory/deployment.";
    String ioos_category "Identifier";
    String long_name "Profile ID";
    Int32 missing_value -9999;
    String sensor_identifier "profile_id";
    String units "1";
    Int32 valid_max 2147483647;
    Int32 valid_min 1;
  }
  profile_lat {
    Float64 _FillValue -9999.9;
    Float64 actual_range 48.855165919950984, 49.26801479671401;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Value is interpolated to provide an estimate of the latitude at the mid-point of the profile";
    String ioos_category "Location";
    String long_name "Profile Latitude";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "profile_lat";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  profile_lon {
    Float64 _FillValue -9999.9;
    Float64 actual_range -63.98158720910035, -62.98168644161428;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Value is interpolated to provide an estimate of the longitude at the mid-point of the profile";
    String ioos_category "Location";
    String long_name "Profile Longitude";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "profile_lon";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  profile_time {
    Float64 actual_range 1.788954712703434e+9, 1.7905237359331e+9;
    String calendar "gregorian";
    String comment "Timestamp corresponding to the mid-point of the profile";
    String ioos_category "Time";
    String long_name "Profile Time";
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "profile_time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  time_uv {
    Float64 actual_range 1.788957514198999e+9, 1.789176780198999e+9;
    String calendar "gregorian";
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Time";
    String long_name "Depth-Averaged Time";
    String observation_type "calculated";
    String sensor_identifier "time_uv";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  u {
    Float64 _FillValue -9999.9;
    Float64 actual_range -0.012301299721002579, 0.11304300278425217;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Currents";
    String long_name "Depth-Averaged Eastward Sea Water Velocity";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "u";
    String standard_name "eastward_sea_water_velocity";
    String units "m.s-1";
    Float64 valid_max 10.0;
    Float64 valid_min -10.0;
  }
  v {
    Float64 _FillValue -9999.9;
    Float64 actual_range -0.0845905989408493, -0.05117940157651901;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Currents";
    String long_name "Depth-Averaged Northward Sea Water Velocity";
    Float64 missing_value -9999.9;
    String observation_type "calculated";
    String platform "platform";
    String sensor_identifier "v";
    String standard_name "northward_sea_water_velocity";
    String units "m.s-1";
    Float64 valid_max 10.0;
    Float64 valid_min -10.0;
  }
  instrument_CTD {
    Int32 _FillValue -999;
    String comment "Standards:  https://vocab.nerc.ac.uk/collection/L05/current/130/  https://vocab.nerc.ac.uk/collection/L22/current/TOOL1745/";
    String identifier "sci_water";
    String ioos_category "Unknown";
    String long_name "RBR Legato3 CTD";
    String platform "shad";
    String serial_number "231026";
    String short_name "CTD";
    String type "instrument";
    String units "1";
  }
  instrument_bpump {
    Int32 _FillValue -999;
    String identifier "ballast_pump";
    String ioos_category "Unknown";
    String long_name "Slocum Glider G3 350 m oil pump";
    String platform "shad";
    String serial_number "0389";
    String short_name "bpump";
    String type "instrument";
    String units "1";
  }
  instrument_hydrophones {
    Int32 _FillValue -999;
    String comment "There was an other dmon2 on here listed with the same serial number (058) so this one will be 058B. Came with sable (1211). Was wired backwards but we switched it to match the wiring of our other dmon2's. Also had to replace the battery. Since it was wired incorrectly the original battery was very dead when we got it.    Standards:  https://vocab.nerc.ac.uk/collection/L05/current/369/";
    String identifier "sci_dmon";
    String ioos_category "Unknown";
    String long_name "digital acoustic monitoring instrument";
    String platform "shad";
    String serial_number "058B";
    String short_name "hydrophones";
    String type "instrument";
    String units "1";
  }
  instrument_thruster {
    Int32 _FillValue -999;
    String identifier "thruster";
    String ioos_category "Unknown";
    String long_name "Slocum Glider Hybrid Thruster";
    String platform "shad";
    String serial_number "517";
    String short_name "thruster";
    String type "instrument";
    String units "1";
  }
 }
  NC_GLOBAL {
    String acknowledgement "The study was funded by Transport Canada's Innovation Centre (TC/IC) and supported by Laurence Lecavalier and Alison Butko at the IC. The DMON hydrophone, real-time acoustic software, and automated dissemination of near real-time detections to partners were provided through collaboration with Dr. Mark Baumgartner at the Woods Hole Oceanographic Institution. The Ocean Tracking Network led this project and their glider team expertly prepared, deployed, piloted and recovered the gliders. Additional logistical support was provided by the Ocean Frontiers Institute. Thank you to the vessel captains who supported deployment and recovery.";
    String cdm_data_type "TrajectoryProfile";
    String cdm_profile_variables "profile_id, time, latitude, longitude";
    String cdm_trajectory_variables "trajectory";
    String comment "A Teledyne Webb Research Slocum G3 glider equipped with passive acoustic listening device (DMON) for a multi-month mission with an extended lithium primary battery pack. The purpose of this mission is to monitor the Gulf of Saint Lawrence shipping lane for the presence of North Atlantic right whales.";
    String contributor_name "Fred Whoriskey, Kim Davies, Adam Comeau, Zach Viva, Jazmine Allan, Jon Pye, Ellis Keener-LaCroix, Hayden Wu";
    String contributor_role "PI, PI, Technical Coordinator, Operator, Operator, Data Scientist, Data Scientist, Data Scientist";
    String Conventions "CF-1.10, COARDS, ACDD-1.3";
    String creator_email "otn@dal.ca";
    String creator_name "Ocean Tracking Network";
    String creator_url "https://oceantrackingnetwork.org/";
    String date_created "2026-09-27T19:00:20Z";
    String date_issued "2026-09-27T19:00:20Z";
    String date_modified "2026-09-27T19:00:20Z";
    String deployment_number "231";
    Float64 Easternmost_Easting -62.981607;
    String featureType "TrajectoryProfile";
    String format_version "IOOS_Glider_NetCDF_v3.0-noqartod.nc";
    String geospatial_bounds "POLYGON ((49.181130 -63.852670, 49.181130 -63.852590, 49.180890 -63.852590, 49.180890 -63.852670, 49.181130 -63.852670))";
    Float64 geospatial_lat_max 49.26802;
    Float64 geospatial_lat_min 48.855042;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -62.981607;
    Float64 geospatial_lon_min -63.981647;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 254.54800415039062;
    Float64 geospatial_vertical_min 0.002724519930779934;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2026-09-27T19:00:20Z - Created with the GUTILS package: https://github.com/SECOORA/GUTILS
2026-09-27T23:42:42Z (local files)
2026-09-27T23:42:42Z http://erddap.oceantrack.org/erddap/tabledap/shad_20260909_231_realtime.html";
    String id "shad_2026_09_09";
    String infoUrl "https://oceantrackingnetwork.org/";
    String institution "Transport Canada";
    String keywords "acoustic, aft, ampherehours, angle, argos, asc, averaged, ballast, bathymetry, battery, bay, below, byte, c_battpos, c_de_oil_vol, c_fin, c_heading, c_pitch, c_thruster_on, c_wpt_lat, c_wpt_lon, canada, cell, channel, circulation, commanded, conductivity, consumed, consumption, count, crs, ctd, cumulative, current, currents, data, dead, density, deployment, depth, depth-averaged, detect, digital, dmon, down, earth, Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Pressure > Water Pressure, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Density, Earth Science > Oceans > Salinity/Density > Salinity, eastward, eastward_sea_water_velocity, elapsed, electrical, energy, epoch, file, fin, fixed, floor, forward, glider, global, gps, gulf, heave, horizontal, hybrid, hydrology, identifier, inclinometer, instantaneous, instrument, instrument_bpump, instrument_CTD, instrument_hydrophones, instrument_thruster, internal, lat_uv, latitude, laurentian, lawrence, leak, legato3, lon_uv, longitude, m_argos_is_xmitting, m_battery, m_battpos, m_bms_aft_current, m_bms_ebay_current, m_bms_pitch_current, m_coulomb_amphr_total, m_de_oil_vol, m_depth, m_depth_rate_avg_final, m_digifin_leakdetect_reading, m_fin, m_gps_lat, m_gps_lon, m_gps_status, m_heading, m_lat, m_leakdetect_voltage, m_leakdetect_voltage_forward, m_leakdetect_voltage_science, m_lon, m_pitch, m_roll, m_thruster_power, m_vacuum, m_veh_temp, m_water_depth, magnetic, measured, measurement, message, mission, monitoring, name, north, northward, northward_sea_water_velocity, ocean, oceans, oil, open, orientation, payload, pitch, platform, platform_heave_rate_down, platform_orientation, platform_pitch_angle, platform_roll_angle, position, positioning, power, practical, pressure, profile, profile_id, profile_lat, profile_lon, profile_time, pump, rate, rbr, reckoned, relative, roll, row, salinity, salinity/density, sci_dmon_msg_byte_count, sci_m_present_secs_into_mission, sci_m_present_time, sci_water_pressure, science, sea, sea_floor_depth_below_sea_surface, sea_water_density, sea_water_electrical_conductivity, sea_water_practical_salinity, sea_water_pressure, sea_water_temperature, seafloor, seawater, since, slocum, sonde, speed, start, statistics, status, surface, system, target, temperature, thruster, time, time_uv, topography, trajectory, trajectory/deployment, transmitting, transport, u, use, v, vacuum, velocity, vertical, voltage, volume, water, waypoint";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "This data may be redistributed and used without restriction.";
    String Metadata_Conventions "CF-1.6, COARDS, ACDD-1.3";
    String naming_authority "org.oceantrackingnetwork";
    Float64 Northernmost_Northing 49.26802;
    String platform_type "Slocum Glider";
    String power_type "Primary lithium";
    String processing_level "Dataset taken from glider native file format and is provided as is with no expressed or implied assurance of quality assurance or quality control.";
    String project "Laurentian Channel real time whale monitoring for dynamic shipping management";
    String publisher_email "otn@dal.ca";
    String publisher_name "Ocean Tracking Network";
    String publisher_url "https://oceantrackingnetwork.org/gliders/";
    String sea_name "Gulf of St. Lawrence";
    String source "Observational data from a profiling glider";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 48.855042;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String summary "Slocum gliders are small, free-swimming, unmanned vehicles that use changes in buoyancy to move vertically and horizontally through the water column in a saw-tooth pattern. They are deployed for days to several months and gather detailed information about the physical, chemical and biological processes of the world's oceans. The Slocum glider was designed and built by Teledyne Webb Research Corporation, Falmouth, MA, USA.";
    String testing_mission "False";
    String time_coverage_duration "P0DT0H28M25.612999916S";
    String time_coverage_end "2026-09-27T15:54:24Z";
    String time_coverage_start "2026-09-09T11:43:27Z";
    String title "Glider deployment #231 - shad 2026-09-09 (realtime)";
    Float64 Westernmost_Easting -63.981647;
    String wmo_id "8901093";
  }
}

 

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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 Data Access Protocol (DAP) and its selection constraints.

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 or Subset form. They make 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
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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