Ocean currents measured by Shipboard Acoustic Doppler Current Profilers (SADCP) aboard NOAA Ship Ka'imimoana in the North Pacific Ocean and South Pacific Ocean from 2009-09-12 to 2009-09-20 (NCEI Accession 0171192)
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title: Ocean currents measured by Shipboard Acoustic Doppler Current Profilers (SADCP) aboard NOAA Ship Ka'imimoana in the North Pacific Ocean and South Pacific Ocean from 2009-09-12 to 2009-09-20 (NCEI Accession 0171192)
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Anchor: https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/4796 Julia M. Hummon
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abstract: This dataset includes ADCP data collected aboard NOAA Ship Ka'imimoana in the North Pacific Ocean and South Pacific Ocean from 2009-09-12 to 2009-09-20 during originator cruise ka_09_03c. These data include CURRENT SPEED - EAST/WEST COMPONENT (U) and CURRENT SPEED - NORTH/SOUTH COMPONENT (V). The instruments used to collect these data include ADCP and GPS. These ADCP data represent the raw dataset. Post processed quality assessed data are not available in this accession.
purpose: This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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beginPosition: 2009-09-12
endPosition: 2009-09-20
supplementalInformation: This dataset was submitted to NCEI as part of a collection of historical UHDAS ADCP datasets from NOAA ships.
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code: ADCP
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description: 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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description: Updated information for this platform from ICES: Name : KA'IMIMOANA Country(s) : US: UNITED STATES (ISO Country Code) Platform Class : 31: Research vessel Call Sign : WTEU IMO : 8835231 Commissioned Date : 1996 Decommissioned Date : 2014 Current Length : 68.3 Built : 1989 Previous Name (Notes): TITAN WOD Code: 7426 JCOMMOPs Recruitment Date: 2000-01-01 Notes : Oceanographic RV. Built as the USNS Titan, became NOAA ship Ka'imimoana in 1996, became Ocean Titan in 2015 Information Sources: - https://en.wikipedia.org/wiki/USNS_Titan_(T-AGOS-15) - https://www.shipspotting.com/photos/1949285?navList=gallery&imo=8835231&page=1&viewType=normal&sortBy=newest Same Vessels Info: 33V1 - OCEAN TITAN General Comments: IMO confirmed in Miramar Code 33KM has been used since at least 2000. See relevant SHIPC version.
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