Dataset: alongtrack
Deployment: LMG0201A

Data collected daily along the ship track in JGOFS format

Chief Scientist:

Robert C. Beardsley (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GLOBEC Southern Ocean (SOGLOBEC)

Data URL:

https://www.bco-dmo.org/dataset-deployment/450285/data

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Description

Environmental and Navigational Data from the Ship's Monitoring Systems,
Reported along the Ship's Track

Cruises often used "9.99" or "9999" to indicate bad data. Those numbers were changed to 'nd'. Not all bad data were flagged in this way however. Users of these data are encouraged to read the Data Report (found at the Directory Level of this system under "Inventory" then under "project/cruise id", and then under "data report") in order to be aware of bad data points that are not indicated by "9"s and therefore remain in the dataset.

Questions regarding this data set should be directed to:
Bob Groman
GLOBEC Data Management Office
Woods Hole Oceanographic Inst.
Woods Hole, MA 02543

Phone: 508 548 1400
E-mail: rgroman@whoi.edu

Last updated March 15, 2006

Methods & Sampling

Dataset acquisition description

Along track data, including CTD, MET and navigation information.

Deployment-specific acquisition description

Along track data, including CTD, MET and navigation information.

Data Processing Description

Dataset Processing Description

This along track (JGOFS) data set was obtained primarily by applying calibrations to raw data and decimating to whole minute intervals. Several fields are derived measurements from more than an single raw input. For example, Course Made Good (cmg) and Speed Over Ground (sog) are calculated from gyro and GPS inputs.Cruises often used '9.99' or '9999' to indicate bad data. Those numbers were changed to 'nd'. Not all bad data were flagged in this way however.

Version 2: Some erroneous coordinates were discovered. The latitude and longitude values 999.99 and 0.0000 were changed to 'nd' to indicate bad data. Added ISO_DateTime_UTC field.

Deployment-specific processing description

More information about this dataset deployment

Funding

Award Number	Funding Source
ANT-9910007	NSF Antarctic Sciences
ANT-9910092	NSF Antarctic Sciences

Instruments

Anemometer

Supplied Description:

An anemometer is a device for measuring the velocity or the pressure of the wind.

Belfort (NBP0103)
R.M. Young (LMG0103, LMG0104, LMG0106, LMG0201A, LMG0203, LMG0205, LMG0302, NBP0104, NBP0202, NBP0204)

Instrument Type

Generic Name: Anemometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/101/

Generic Description:

An anemometer is a device for measuring the velocity or the pressure of the wind. It is commonly used to measure wind speed. Aboard research vessels, it is often mounted with other meteorological instruments and sensors.

Barometer

Supplied Description:

A barometer is an instrument used to measure atmospheric pressure.

R.M. Young (LMG0103, LMG0104, LMG0106, LMG0201, LMG0203, LMG0205, LMG0302, NBP0104, NBP0202, NBP0204)
Atmospheric (NBP0103)

Instrument Type

Generic Name: Barometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0281/

Generic Description:

A barometer is an instrument used to measure atmospheric pressure. There are many types of barometers identified by make and model and method of measurement.

Echo sounder - single-beam

Supplied Name: Echo Sounder

Supplied Description:

Used to measure the water depth.

ODEC Bathy 2000 (NBP0103, NBP0104, NBP0202)
Simrad EK200 Sonar (NBP0103, NBP0104, NBP0202)
Knudsen 320B/R (LMG0104, LMG0201, LMG0203, LMG0205, LMG0302, NBP0204)

Instrument Type

Generic Name: Echo sounder - single-beam

Acronym: Echo Sounder SB

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/156/

Generic Description:

A single-beam echo sounder is an instrument that measures water depth at a single point below the platform by timing pulses of sound reflected on the seafloor. The echo sounder transmits and receives sound, accurately measuring the time it takes to leave the sounder, reach the bottom and return to the sounder. It then converts this information into digital or graphic representations of the bottom depth and relief.
The average echo sounder consists of a transmission and reception unit that sends sound signals through the water, receives and decodes information and converts that information into either a graphic or visual form. Attached to the receiver is a transducer that acts as a microphone and a speaker under the water. Sound waves travel at approximately 1500 m/s through the water dependent on water temperature". more from LMS Technologies

Eppley Longwave Radiometer

Supplied Description:

Instrument Type

Generic Name: Eppley Longwave Radiometer

Acronym: Eppley PIR

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0083/

Generic Description:

The Eppley Precision Infrared Radiometer (PIR) pyrgeometer measures longwave (infrared) radiation. It is housed in a weatherproof titanium canister that has been painted with a very flat black paint that absorbs radiation. A small glass dome at the top of the instrument is covered with an 'interference coating' which allows only infrared radiation to come through. Light levels are detected as temperature changes creating voltages in fine wire coil detectors. more from Eppley Labs

Fluorometer

Supplied Description:

Sea surface fluorometer readings in voltages, (range 0-5)

Chelsea model Mk III Aquatracka SN 088080 (NBP0103)
Turner 10-AU-005 Lamp: daylight 10-045, reference filter: 10-052, emission filter: 10-051, excitation filter: 10-050 (LMG0103, LMG0104, LMG0201, LMG0203, LMG0205, NBP0104, NBP0202, NBP0204)

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Hygrometer

Supplied Description:

used to measure relative humidity and/or wet temperature.

Rotronics MP-101A-C4 (NBP0103)
R.M. Young (LMG0104, LMG0106, LMG0201, LMG0203, LMG0205, LMG0302, NBP0104, NBP0202, NBP0204)

Instrument Type

Generic Name: Hygrometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0282/

Generic Description:

Hygrometers are used for measuring relative humidity. This term is used when details of the make, model number and measurement principle are not known.

Photosynthetically Available Radiation Sensor

Supplied Name: Photosynthetically Available Radiation Sensors

Supplied Description:

Photosynthetically Available Radiation 400-700nm (PAR), sensor package mounted on ship's science mast.

BSI QSR-240

Instrument Type

Generic Name: Photosynthetically Available Radiation Sensor

Acronym: PAR sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known.

Precision Spectral Pyranometer

Supplied Description:

Used to measure long wave radiation.

Eppley PSP

Instrument Type

Generic Name: Precision Spectral Pyranometer

Acronym: Eppley PSP

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/112/

Generic Description:

This radiometer measures sun and sky irradiance in the range of wavelengths 0.285 to 2.8 microns, including most of the solar spectrum. The PSP is intended to weight the energy flux in all wavelengths equally. It is a "hemispheric receiver" intended to approximate the
cosine response for oblique rays. The Eppley Precision Spectral Pyranometer (PSP) is primarily used where high accuracy is required or where it is used to calibrate other pyranometers. The PSP outputs a low level voltage ranging from 0 to a maximum of about 12mV depending on sensor calibration and radiation level. An instruction manual provided by Eppley contains the sensor calibration constant and serial number. The Precision Spectral Pyranometer is a World Meteorological Organization First Class Radiometer and comes with a calibration certificate traceable to the World Radiation Reference and a temperature compensation curve. More information is available from Eppley Labs.

Thermosalinograph

Supplied Description:

Thermosalinograph used to obtain a continuous record of sea surface temperature and salinity.

Instrument Type

Generic Name: Thermosalinograph

Acronym: TSG

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/133/

Generic Description:

A thermosalinograph (TSG) is used to obtain a continuous record of sea surface temperature and salinity. On many research vessels the TSG is integrated into the ship's underway seawater sampling system and reported with the underway or alongtrack data.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	Cruise id, e.g. NBP0202, for Nathaniel B. Palmer cruise 0202		cruiseid
date_gmt	month, day, year (GMT time) e.g. mar18 2002, format: MMMdd_yyyy	unitless	date_gmt
time_gmt	time GMT, 24 hour clock	decimal hours	time_gmt
lat	Latitude, negative = South	decimal degrees	lat
lon	Longitude, negative = West	decimal degrees	lon
sog	Speed over ground	knots	sog
gps_hdop	Horizontal Dilution of Position is an indicator of the precision of the GPS measurement. The lower the number, the more precise the position.	-	no_bcodmo_term
head	The ship's heading, measured by the Gyroscope.	Degrees(azimuth)	heading
cmg	Course made good: the course actually achieved on the chart (map), after making allowances for wind direction and currents.	Degrees(azimuth)	cmg
PAR	downwelled Photosynthetically Available Radiation 400-700nm (PAR), sensor package mounted on ship's science mast.	uE/m<sup>2</sup>/sec	PAR
temp_ss	Sea surface temperature	degrees C	SST
cond_ss	Sea surface conductivity	siemens/meter	cond_ss
sal_ss	Sea surface salinity	dimensionless	sal_ss
depth_w	Depth of water, uncorrected	meters	depth_w
wind_speed_c	Wind speed (true, corrected for ship motion)	meters/sec	wind_speed_c
wind_dir_c	Wind direction (true, corrected for ship motion)	degrees(azimuth)	wind_dir_c
temp_air	Air temperature	degrees C	temp_air
humidity	Relative humidity	percent	humidity
press_bar	Barometric pressure	milliBars	press_bar
flvolt	Sea surface fluorometer readings in voltages, (range 0-5)	volts	flvolt
radiation_l	long wave radiation, using a Precision Infrared Radiometer	watts/meters<sup>2</sup>	radiation_l
radiation_s	short wave radiation, using a Precision Spectral Pyranometer	watts/meters<sup>2</sup>	radiation_s
yrday_gmt	Jan. 1 = yrday 0. GMT day and decimal time, as 325.5 for the 326th day of the year, or November 22 at 1200 hours (noon).		yrday_gmt
year	year in format yyyy	unitless	year
ISO_DateTime_UTC	Date and time following ISO8601 convention.	yyyy-MM-dd'T'HH:mm:ss.SS'Z'	ISO_DateTime_UTC

Database

Contribute Data

Dataset: alongtrack
Deployment: LMG0201A

Environmental and Navigational Data from the Ship's Monitoring Systems,
Reported along the Ship's Track

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Database

Contribute Data

Dataset: alongtrackDeployment: LMG0201A

Environmental and Navigational Data from the Ship's Monitoring Systems, Reported along the Ship's Track

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Dataset: alongtrack
Deployment: LMG0201A

Environmental and Navigational Data from the Ship's Monitoring Systems,
Reported along the Ship's Track