Current measurement by using Doppler log.

Current measurement by using Doppler log.

A new method of current measurement on shipboard by using acoustic Doppler log, can describe a detailed current structure both in horizontally and vertically. In comparison with traditional GEK (Geomagnetic Electro Kinetograph), this method has several advantages of capability to measure a current velocity, 1) without towing electrodes, 2) without change of ship's course, 3) at subsurface layers, and 4) in a shallow water region at depths of a few hundred meters, or in low-latitude area near the magnetic equator. In 1984 and 1985, current observations were made with the Doppler log system ( 130 kHz, 3 beams) installed on S/V Takuyo as a ship speed meter. Obtained current profiles in each observation are reasonable. From such a good result, it is recognized that new method is useful and would be widely used instead of GEK.

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Bibliographic Details
Main Authors: Ishii, Haruo, Nishida, Hideo, Kosugi, Akira, Ueno, Yoshizo, Michida, Yutaka
Format: Journal Contribution biblioteca
Language:Japanese
Published: 1986
Online Access:http://hdl.handle.net/1834/16207
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id dig-aquadocs-1834-16207
record_format koha
spelling dig-aquadocs-1834-162072021-05-19T06:55:57Z Current measurement by using Doppler log. Ishii, Haruo Nishida, Hideo Kosugi, Akira Ueno, Yoshizo Michida, Yutaka A new method of current measurement on shipboard by using acoustic Doppler log, can describe a detailed current structure both in horizontally and vertically. In comparison with traditional GEK (Geomagnetic Electro Kinetograph), this method has several advantages of capability to measure a current velocity, 1) without towing electrodes, 2) without change of ship's course, 3) at subsurface layers, and 4) in a shallow water region at depths of a few hundred meters, or in low-latitude area near the magnetic equator. In 1984 and 1985, current observations were made with the Doppler log system ( 130 kHz, 3 beams) installed on S/V Takuyo as a ship speed meter. Obtained current profiles in each observation are reasonable. From such a good result, it is recognized that new method is useful and would be widely used instead of GEK. Published 2020-02-12T12:32:17Z 2020-02-12T12:32:17Z 1986 Journal Contribution Refereed http://hdl.handle.net/1834/16207 ja https://www1.kaiho.mlit.go.jp/GIJUTSUKOKUSAI/KENKYU/report/rhr21/rhr21-08.pdf pp.135-150
institution UNESCO
collection DSpace
country Francia
countrycode FR
component Bibliográfico
access En linea
databasecode dig-aquadocs
tag biblioteca
region Europa del Oeste
libraryname Repositorio AQUADOCS
language Japanese
description A new method of current measurement on shipboard by using acoustic Doppler log, can describe a detailed current structure both in horizontally and vertically. In comparison with traditional GEK (Geomagnetic Electro Kinetograph), this method has several advantages of capability to measure a current velocity, 1) without towing electrodes, 2) without change of ship's course, 3) at subsurface layers, and 4) in a shallow water region at depths of a few hundred meters, or in low-latitude area near the magnetic equator. In 1984 and 1985, current observations were made with the Doppler log system ( 130 kHz, 3 beams) installed on S/V Takuyo as a ship speed meter. Obtained current profiles in each observation are reasonable. From such a good result, it is recognized that new method is useful and would be widely used instead of GEK.
format Journal Contribution
author Ishii, Haruo
Nishida, Hideo
Kosugi, Akira
Ueno, Yoshizo
Michida, Yutaka
spellingShingle Ishii, Haruo
Nishida, Hideo
Kosugi, Akira
Ueno, Yoshizo
Michida, Yutaka
Current measurement by using Doppler log.
author_facet Ishii, Haruo
Nishida, Hideo
Kosugi, Akira
Ueno, Yoshizo
Michida, Yutaka
author_sort Ishii, Haruo
title Current measurement by using Doppler log.
title_short Current measurement by using Doppler log.
title_full Current measurement by using Doppler log.
title_fullStr Current measurement by using Doppler log.
title_full_unstemmed Current measurement by using Doppler log.
title_sort current measurement by using doppler log.
publishDate 1986
url http://hdl.handle.net/1834/16207
work_keys_str_mv AT ishiiharuo currentmeasurementbyusingdopplerlog
AT nishidahideo currentmeasurementbyusingdopplerlog
AT kosugiakira currentmeasurementbyusingdopplerlog
AT uenoyoshizo currentmeasurementbyusingdopplerlog
AT michidayutaka currentmeasurementbyusingdopplerlog
_version_ 1756076727715495936

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