gov.noaa.nodc:0000624
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gov.noaa.nodc:Mamala_Bay_Study_1993-1995
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2024-02-21T13:26:24Z
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Moored ADCP current measurements from Mamala Bay, Oahu, Hawaii, during 1997 - 1998 (NCEI Accession 0000624)
2001-11-28
publication
2022-01-03
revision
NOAA National Centers for Environmental Information
gov.noaa.nodc:0000624
NCEI Archive Management System
0000624
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publisher
Ian Wasnich
oceanit@oceanit.com
resourceProvider
Oceanit Laboratories, Inc.
oceanit@oceanit.com
resourceProvider
Oceanit Laboratories, Inc.
oceanit@oceanit.com
author
Michelle Eich
University of Hawai'i at Mānoa (UHM)
collaborator
Oceanit Laboratories, Inc.
oceanit@oceanit.com
contributor
tableDigital
A downward-looking moored ADCP instrument was deployed at the surface about a mile south of Honolulu Harbor in waters of about 280 feet. The instrument was in operation from May 1997 - August 1998, when it was tangled in the mooring line of a ship and made unoperational. The data are one-minute samples taken from 20 to 62 m at 2 m depth intervals. Primary processing was done by Oceanit. The data were collected to study the ocean currents in the region south of the Honolulu reef runway near the Sand Island sewage outfall. Additional Mamala Bay data are archived at the NODC under individual accession numbers.
To study the ocean currents in the region south of the Honolulu reef runway near the Sand Island sewage outfall.
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0000624
NCEI ACCESSION NUMBER
2001-11-29
publication
CURRENT METER - EAST-WEST COMPONENT (U)
CURRENT METER - NORTH-SOUTH COMPONENT (V)
DEPTH - OBSERVATION
theme
NODC DATA TYPES THESAURUS
ADCP
instrument
NODC INSTRUMENT TYPES THESAURUS
current measurements
time series
theme
NODC OBSERVATION TYPES THESAURUS
FIXED PLATFORM OF UNITED STATES
platform
NODC PLATFORM NAMES THESAURUS
Oceanit Laboratories, Inc.
dataCentre
NODC COLLECTING INSTITUTION NAMES THESAURUS
Oceanit Laboratories, Inc.
dataCentre
NODC SUBMITTING INSTITUTION NAMES THESAURUS
Mamala Bay Study
project
NODC PROJECT NAMES THESAURUS
Coastal Waters of Hawaii
North Pacific Ocean
place
NODC SEA AREA NAMES THESAURUS
oceanography
theme
WMO_CategoryCode
2012-09-15
publication
DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce
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Global Change Master Directory (GCMD) Data Center Keywords
2023
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17
Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
Greenbelt
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EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS
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Global Change Master Directory (GCMD) Science Keywords
2023
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17
Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
Greenbelt
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information
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Ocean currents
moored ADCP
theme
Originator Keywords
ADCP > Acoustic Doppler Current Profiler
instrument
Global Change Master Directory (GCMD) Instrument Keywords
2023
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17
Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
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custodian
FIXED OBSERVATION STATIONS > FIXED OBSERVATION STATIONS
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OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
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Global Change Master Directory (GCMD) Location Keywords
2023
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Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)
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information
custodian
Airport Reef Runway
Hawaii
Mamala Bay
Oahu
Pacific Ocean
Sand Island Sewage Outfall
coastal ocean
place
Originator Place Names
accessLevel: Public
otherRestrictions
Cite as: Oceanit Laboratories, Inc. (2001). Moored ADCP current measurements from Mamala Bay, Oahu, Hawaii, during 1997 - 1998 (NCEI Accession 0000624). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0000624. Accessed [date].
Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Comprehensive Dataset and Reports of the Mamala Bay Study during 1993-1995 on Oahu, Hawaii
1996
publication
NOAA National Centers for Environmental Information
gov.noaa.nodc:Mamala_Bay_Study_1993-1995
https://www.ncei.noaa.gov/archive/accession/Mamala_Bay_Study_1993-1995
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NOAA National Centers for Environmental Information
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eng; USA
utf8
environment
oceans
-157.89
-157.89
21.28
21.28
1997-05-01
1998-08-31
Michelle Eich, a graduate student at the University of Hawaii, applied quality control to select time periods of the data. Some of the other periods have remaining questionable features as noted.
Completeness_Report: Quality control performed on the following months:
199708, 199709, 199710, 199711, 199805, 199806, 199807
No Quality control and high potential for data corruption in the following months: 199705, 199706, 199712, 199801, 199808
Process Description: ADCP mooring string deployed. Some of the data received quality control by Michelle Eich of the Oceanography Department at the University of Hawaii. Obvious spikes were replaced with missing data flags. Deepest two depth cells have questionable data quality due to proximity to the bottom.
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NCEI Accession 0000624 v1.1 was published.
2001-11-28T19:56:56Z
NCEI Accession 0000624 v1.1
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https://www.ncei.noaa.gov/archive/accession/0000624/1.1
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NCEI Accession 0000624 v1.1
published 2001-11-28T19:56:56Z
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NCEI Accession 0000624 was revised and v1.2 was published.
Additional metadata files were received or created for this dataset. These updates were copied into the about/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
2022-01-03T00:07:39Z
NCEI Accession 0000624 v1.2
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https://www.ncei.noaa.gov/archive/accession/0000624/1.2
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NCEI Accession 0000624 v1.2
published 2022-01-03T00:07:39Z
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NOAA National Centers for Environmental Information
NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
2015-04-22T00:00:00
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Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
NCEI Accession 0000624 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
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ADCP
ADCP
Acoustic Doppler Current Profiler
The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile.
As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements.
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