Leimann, Ilmar; Mertens, Christian (2025): Vessel mounted ADCP current measurements (75 kHz) during RV METEOR cruise M188 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.983495 (DOI registration in progress)
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Published: 2025-07-03
Abstract:
Upper-ocean current velocities were measured along the track of the cruise M188 (March 7 - April 13, 2023) using a vessel-mounted acoustic current Doppler profiler (ADCP). The instrument was a Teledyne RD Instruments 75-kHz Ocean Surveyor, with the transducer was installed 5.0 m below the waterline. The instrument was operated in narrowband mode to achieve the maximum possible range. Velocity data were recorded in 127 5-m bins. The navigational data, as well as heading, pitch and roll data, were recorded together with the velocity measurements by the data acquisition software (VmDAS). The velocity data were converted into earth coordinates and averaged into one-minute intervals. A water track calibration was used (OSADCP_Toolbox) to determine misalignment angle (-0.010°) and amplitude factor (0.998). The accuracy of the velocity data varies, and depends on the number of available good pings in each depth cell during one measurements interval.
Related to:
Leimann, Ilmar; Mertens, Christian (2025): Vessel mounted ADCP current measurements (38 kHz) during RV METEOR cruise M188 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.983547
Mertens, Christian; Lage, Mariana; Oelerich, Ria; Boatwright, Victoria; Methale Puthukkottu, Subeesh; Stake, Jürgen; Meiritz, Luisa Chiara; Breunig, Emelie; Welsch, Andreas; Bracamontes Ramirez, Joel; Leimann, Ilmar; Dennert, Peter; Epke, Moritz; Kourkouraidou, Zoi; Aschenbeck, Lara Jane; Duong, Buu Lik; Rosenau, Silvano; Enneper, Che; Suter, Patrick (2025): Synoptic Observations - A Nested Approach to Study Energy Transfer & Turbulence in the Ocean in the Eastern South Atlantic/Walvis Ridge, Cruise No. M188, March 7 - April 13, 2023, Walvis Bay (Namibia) - Walvis Bay (Namibia). METEOR-Berichte, Begutachtungspanel Forschungsschiffe, M188, 43 pp, https://doi.org/10.48433/cr_m188
Related code / software:
Kopte, Robert; Fischer, Tim; Krahmann, Gerd; Brandt, Peter; Faber, Claas (2024): OSADCP Toolbox. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Doi:10.3289/SW_2_2024
Project(s):
Coverage:
Median Latitude: -32.625159 * Median Longitude: 5.922045 * South-bound Latitude: -36.211746 * West-bound Longitude: 3.501985 * North-bound Latitude: -26.843177 * East-bound Longitude: 14.791690
Date/Time Start: 2023-03-19T14:08:01 * Date/Time End: 2023-04-09T23:10:00
Minimum DEPTH, water: 12.5 m * Maximum DEPTH, water: 647.5 m
Event(s):
M188_0_Underway-2 * Latitude Start: -36.211746 * Longitude Start: 14.791690 * Latitude End: -26.843177 * Longitude End: 10.960403 * Date/Time Start: 2023-03-19T14:08:01 * Date/Time End: 2023-04-09T23:10:00 * O2A Registry URI: https://registry.o2a-data.de/items/7480 * Campaign: M188 (SONETT II) * Basis: Meteor (1986) * Method/Device: Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) * Comment: event was not logged in DSHIP
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Leimann, Ilmar | Geocode | ||
| 2 | LATITUDE | Latitude | Leimann, Ilmar | Geocode | ||
| 3 | LONGITUDE | Longitude | Leimann, Ilmar | Geocode | ||
| 4 | DEPTH, water | Depth water | m | Leimann, Ilmar | Geocode | |
| 5 | Current velocity, east-west | Cur vel U | cm/s | Leimann, Ilmar | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) | |
| 6 | Current velocity, north-south | Cur vel V | cm/s | Leimann, Ilmar | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) | |
| 7 | Percent good pings | good ping | % | Leimann, Ilmar | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
10742352 data points
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