NDLI: A three-component bistatic coherent Doppler velocity profiler: error sensitivity and system accuracy

Content Provider	IEEE Xplore Digital Library
Author	Zedel, L. Hay, A.E.
Copyright Year	1976
Abstract	We report on a 1.7-MHz coherent Doppler sonar system designed for near-shore environments that provides three-component velocity profiles over an O(1-m-depth) range. The use of a bistatic geometry allows three independent components of velocity to be measured simultaneously in time and coincident in space. The system was calibrated in a tow-tank facility for horizontal velocities up to 2 m/s. For multiple pulse-pair ensemble-averaged velocity estimates generated at a rate of 30 profiles/second in 0.7 cm depth bins, the standard deviation in measured vertical velocity is about 1% of the total flow speed. For the horizontal components (based on bistatic measurements), the standard deviation of velocity estimates is about 5%. Absolute accuracies are also about 5% of the speed but a portion of this bias is caused by flow disturbance around the instrument package: this disturbance is modeled using potential flow past a cylinder.
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	717
Ending Page	725
Page Count	9
File Size	308919
File Format	PDF
ISSN	03649059
Volume Number	27
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Velocity measurement Pulse measurements Measurement standards Sonar measurements Geometry Time measurement Extraterrestrial measurements Pulse generation Fluid flow measurement Instruments
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

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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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