Kopte, Robert; Bach, Wolfgang (2025): Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO311 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.987454
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2025-11-19 • DOI registered: 2026-01-09
Abstract:
Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO311 were collected by a vessel-mounted 75 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 8.00 m, a blanking distance of 8.00 m, and a total of 100 bins, covering the depth range between 22.0 m and 814.0 m. Attitude data from the ship's motion reference unit were used by the data acquisition software VmDAS internally to convert ADCP beam velocities to geographic coordinates. The Python toolbox OSADCP (version 2.2.0) was used for data post-processing. Acoustic Interferences were identified based on outliers in the ADCP echo intensity data. Echo intensity data were cleaned accordingly and affected velocity cells were flagged to be removed prior ensemble-averaging. The ship's velocity was calculated from position fixes obtained by the Global Navigation Satellite System (GNSS), taking into account lever arms of ADCP transducer and GNSS antenna. Accuracy of the derived water velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data processing included water track calibration of the misalignment angle (-45.2061° +/- 0.7743°) and scale factor (0.9975 +/- 0.0131) of the measured velocities. The velocity data were averaged in time using an average interval of 120 s. Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'.
Related to:
Bach, Wolfgang; Keith, Manuel; Falkenberg, Jan Johannes; Schleifer, Bernd; Baumann, Nils; Höß, Alica; Hampel, Fabian; Reiser, Hans; Berndt, Paul; Maak, Joely Marie; Von der Gracht, Mira; Wallrath, Tino; Röhler, Aaron; Röhler, Fanny; Meyerdierks, Anke; Recke, Charlotte; Rooyakkers, Shane; Palmer, Neville; Bagnasco, Alessio; McKenzie, Kelsey; Scheffler, Johannes; Guerra Braga, Carlos Henriq; Eifried, Markus; Bergenthal, Markus; Fröhlich, Siefke; Gopikrishnan, Arunima; Mai, Hoang Anh; Ahrlich, Frauke; Schmidt, Werner; Krahl, Julia; Schulze, Marius; Reuter, Michael; Meyer-Schack, Birgit (2025): Scientific Drilling of Brothers Volcano, Kermadec Arc, New Zealand, to Investigate Hydrothermal Processes in an Active Submarine Island Arc Volcano, Cruise No. SO311, 26.03.2025 - 01.05.2025, Wellington (New Zealand) - Auckland (New Zealand). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO311, 148 pp, https://doi.org/10.48433/cr_so311
Kopte, Robert; Bach, Wolfgang (2025): Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO311 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.987147
Other version:
nc file: ADCP current measurements (75 kHz) during RV SONNE cruise SO311 (2025). so_311_vmadcp_75khz.nc
Data processing report:
Kopte, Robert (2025): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during SONNE cruise SO311. Institute of Geosciences, Kiel University, so_311_vmadcp_75khz_proc_report.pdf
Standard operating procedure:
Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 75kHz ADCP aboard of RV Sonne (vessel:sonne:adcp_75khz_647271). Zenodo, https://doi.org/10.5281/zenodo.7022767
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: -34.704915 * Median Longitude: 179.136040 * South-bound Latitude: -35.804300 * West-bound Longitude: 178.400800 * North-bound Latitude: -32.572500 * East-bound Longitude: -179.598600
Date/Time Start: 2025-03-31T02:56:00 * Date/Time End: 2025-04-29T20:00:00
Minimum DEPTH, water: 22.0 m * Maximum DEPTH, water: 814.0 m
Event(s):
SO311_0_Underway-3 * Latitude Start: -34.876000 * Longitude Start: 179.081300 * Latitude End: -35.804300 * Longitude End: 178.469700 * Date/Time Start: 2025-03-31T02:56:00 * Date/Time End: 2025-04-29T20:00:00 * Elevation: -1664.1 m * O2A Registry URI: https://registry.o2a-data.de/items/7494 * Campaign: SO311 (DRILL BROTHERS) * Basis: Sonne_2 * Method/Device: Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
12374658 data points
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