NDLI: In situ evaluation of Acoustic Doppler Current Profiler data in deep sea

Content Provider	IEEE Xplore Digital Library
Author	Iwase, R. Mitsuzawa, K.
Copyright Year	2008
Description	Author affiliation: Japan Agency for Marine-Earth Sci. & Technol. (JAMSTEC), Yokosuka (Iwase, R.; Mitsuzawa, K.)
Abstract	Water current and echo intensity data obtained with an Acoustic Doppler Current Profiler (ADCP) which is attached to a cabled observatory on deep seafloor were evaluated in situ by comparing current velocity data with those obtained with moored current meters which were temporarily deployed and by investigating artificial disturbance that appeared on both current velocity and echo intensity which were caused by a Remotely Operated Vehicle (ROV) and a manned submersible. As the result, current velocity data obtained with ADCP were roughly correlated well in long period with those with moored current meters, although there were discrepancies in short period to some extent which would probably be associated with seafloor topography at the observation site. As for the artificial disturbance caused by an ROV and a manned submersible, the acoustic noise caused by them did not seem to affect current velocity data nor echo intensity of ADCP except when they worked very close to the observatory. On the other hand, water current fluctuation caused by the ROV was observed especially when it was descending and ascending. The increase of echo intensity at corresponding altitude which was caused by the reflected acoustic signal from the submersible was clearly observed when it came across the area within the angle of about fifteen degrees from the axis of a transducer of ADCP. Additional utilization of ADCP such as detection of marine mammals larger than a submersible "Sinkai 2000" like diving whales could be possible that would be important for marine ecological study.
Starting Page	1
Ending Page	6
File Size	7249824
Page Count	6
File Format	PDF
ISBN	9781424421251
DOI	10.1109/OCEANSKOBE.2008.4531078
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-08
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic signal detection Whales Remotely operated vehicles Underwater vehicles Observatories Sea floor Communication cables Surfaces Acoustic noise Fluctuations
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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