Dataset: sonobuoy_whale
Deployment: LMG0103

Sonobuoy (Whale-acoustic) data

Principal Investigator:

Dr John Hildebrand (University of California-San Diego Scripps, UCSD-SIO)

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/450366/data

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Description

Working Procedure:
A sonobuoy is deployed and monitored until it is out of range. The length of time the sonobuoy can be heard depends on the speed of the ship, the sonobuoy's direction relative to the ship and the prevailing sea, ice and weather conditions. When a whale is heard, an attempt is made to identify the species and note it. If a seal is heard, it is just noted as a seal. The sonobuoy was set to scuttle after 8 hours.

Questions regarding these data should be directed to:
John Hildebrand
Scripps Institution of Oceanography, UCSD
9500 Gilman Drive
La Jolla CA, 92093-0205

Email: jhildebrand@ucsd.edu

Last Updated February 22, 2006

Methods & Sampling

Dataset acquisition description

A sonobuoy is deployed and monitored until it is out of range. The length of time the sonobuoy can be heard depends on the speed of the ship, the sonobuoy's direction relative to the ship and the prevailing sea, ice and weather conditions. When a whale is heard, an attempt is made to identify the species and note it. If a seal is heard, it is just noted as a seal. The sonobuoy was set to scuttle after 8 hours.

Deployment-specific acquisition description

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
ANT-9910007	NSF Antarctic Sciences

Instruments

Sonobuoy

Supplied Description:

53B denotes DIFAR (directional fixing and ranging) sonobuoy, having a frequency range of 10 Hz to 2.5 kHz.
57B denotes an omnidirectional sonobuoy with a frequency range up to 40 kHz.

Instrument Type

Generic Name: Sonobuoy

Generic Description:

A Sonobuoy is a relatively small (typically 4 inches, or 124 mm, in diameter and 36 inches, or 910 mm, long) expendable sonar system that is dropped/ejected from aircraft or ships conducting anti-submarine warfare or underwater acoustic research.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	cruise identification		cruiseid
year	year of cruise in YYYY format	unitless	year
deployno	sonobuoy deployment number		deployno
day_gmt	day of month. GMT time	DD	day_gmt
month_gmt	month of year (01-12), GMT time	MM	month_gmt
time_gmt	time of day 24 hour clock, GMT	HHmm	time_gmt
lat	latitude, negative = South	decimal degrees	lat
lon	longitude, negative = West	decimal degrees	lon
inst	instrument, sonobuoy type: 53B denotes DIFAR (directional fixing and ranging) sonobuoy, having a frequency range of 10 Hz to 2.5 kHz. 57B denotes an omnidirectional sonobuoy with a frequency range up to 40 kHz.		instrument
Mn	Megaptera novaeangliae - humpback whale calls identified by the following codes: x = call detected x? = possible call - = no call		no_bcodmo_term
Bb	Balaenoptera bonaerensis - Antarctic minke whale, see call codes above		no_bcodmo_term
Bp	Balaenoptera physalus - fin whale, see call codes above		no_bcodmo_term
Bm	Balaenoptera musculus - blue whale, see call codes above		no_bcodmo_term
Odt	odontocete whale, see call codes above		no_bcodmo_term
Seal	seal call, see call codes above		no_bcodmo_term
comments	reason for sonobuoy deployment at that location, as a comment		comment
range	transmission range of sonobuoy		range

Database

Contribute Data

Dataset: sonobuoy_whale
Deployment: LMG0103

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: sonobuoy_whaleDeployment: LMG0103

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: sonobuoy_whale
Deployment: LMG0103