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Inverted echo sounder measurements collected in the Japan/East Sea, from 1999-06-08 to 2001-07-25, under the sponsorship of the Office of Naval Research (NCEI Accession 0002331)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 01:32 AM | Dataset Last Updated: February 13, 2026 at 12:00 AM
Observations were conducted from June 1999 to July 2001 to study the shallow and deep current variability in the southwest Japan/East Sea. Data were collected during the field experiment with a two-dimensional array of pressure-gauge equipped inverted echo sounders (PIES) and deep recording current meters (RCM). Hourly measurements of vertical acoustic travel time, pressure, temperature and horizontal currents are provided. Additional processing has been done to provide data sets which can easily be used together as a coherent array. The travel time records have been projected on to a common depth level, low-pass filtered, and subsampled to twice daily. The low-pass filtered, subsampled pressures have been adjusted to a common, deep geopotential surface. Small gaps in the current measurements have been replaced by fitted-spline interpolated values.

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0002331 ACOUSTIC TRAVEL TIME CURRENT SPEED - EAST/WEST COMPONENT (U) CURRENT SPEED - NORTH/SOUTH COMPONENT (V) DEPTH - SENSOR HYDROSTATIC PRESSURE WATER TEMPERATURE CTD

Complete Metadata
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accessLevel non-public
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describedByType application/octet-steam
description Observations were conducted from June 1999 to July 2001 to study the shallow and deep current variability in the southwest Japan/East Sea. Data were collected during the field experiment with a two-dimensional array of pressure-gauge equipped inverted echo sounders (PIES) and deep recording current meters (RCM). Hourly measurements of vertical acoustic travel time, pressure, temperature and horizontal currents are provided. Additional processing has been done to provide data sets which can easily be used together as a coherent array. The travel time records have been projected on to a common depth level, low-pass filtered, and subsampled to twice daily. The low-pass filtered, subsampled pressures have been adjusted to a common, deep geopotential surface. Small gaps in the current measurements have been replaced by fitted-spline interpolated values.
distribution 
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/accessions/iso/xml/0002331.xml
issued 2005-08-17T00:00:00.000+00:00
keyword 
[
  "0002331",
  "ACOUSTIC TRAVEL TIME",
  "CURRENT SPEED - EAST/WEST COMPONENT (U)",
  "CURRENT SPEED - NORTH/SOUTH COMPONENT (V)",
  "DEPTH - SENSOR",
  "HYDROSTATIC PRESSURE",
  "WATER TEMPERATURE",
  "CTD",
  "current meter",
  "inverted echo sounder (IES)",
  "physical",
  "time series",
  "FIXED PLATFORM OF UNITED STATES",
  "University of Rhode Island, Graduate School of Oceanography",
  "University of Rhode Island, Graduate School of Oceanography",
  "Japan Sea",
  "oceanography",
  "DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce",
  "URI/GSO > Graduate School of Oceanography, University of Rhode Island",
  "EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS",
  "EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE",
  "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE",
  "CTD > Conductivity, Temperature, Depth",
  "CURRENT METERS",
  "IES > Inverted Echo Sounders",
  "FIXED OBSERVATION STATIONS > FIXED OBSERVATION STATIONS",
  "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN",
  "East Sea",
  "Sea of Japan",
  "Ulleung Basin"
]
landingPage https://www.ncei.noaa.gov/contact
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2026-02-13T00:00:00.000+00:00
publisher 
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references 
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rights otherRestrictions
spatial 132.7,35.84,129.2,38.03
temporal 1999-06-08T00:00:00+00:00/2001-06-25T00:00:00+00:00
theme 
[
  "geospatial"
]
title Inverted echo sounder measurements collected in the Japan/East Sea, from 1999-06-08 to 2001-07-25, under the sponsorship of the Office of Naval Research (NCEI Accession 0002331)

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