Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Institut für Geowissenschaften, Christian-Albrechts-Universität, Kiel IfG http://www.ifg.uni-kiel.de/ https://ror.org/04v76ef78 Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 2026 Shipboard ADCP current measurements (38 kHz) during RV MARIA S. MERIAN cruise MSM140/2 dataset https://doi.pangaea.de/10.1594/PANGAEA.993783 2026-04-27T06:28:18 Current velocities of the upper water column along the cruise track of R/V Maria S. Merian cruise MSM140/2 were collected by a vessel-mounted 38 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 32.00 m, a blanking distance of 16.00 m, and a total of 50 bins, covering the depth range between 54.0 m and 1622.0 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. Upper-bin single-ping ADCP velocities affected by low echo-intensity were identified using a robust covariance-based outlier detection in velocity-backscatter space and removed when exceeding a chi-square confidence threshold. 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 (0.6857° +/- 0.5150°) and scale factor (1.0016 +/- 0.0102) of the measured velocities. The velocity data were averaged in time using an average interval of 60 s. Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 2026 Shipboard ADCP current measurements (75 kHz) during RV MARIA S. MERIAN cruise MSM140/2 dataset https://doi.pangaea.de/10.1594/PANGAEA.993684 Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Bergmann Josy Frederick Jennica Hayo Lennéa jhayo@smail.uni-koeln.de Kinne Stefan stefan.kinne@mpimet.mpg.de Reischmann Lucas L.Reischmann@mpic.de Stammes Piet piet.stammes@knmi.nl Tuinder Olaf Wang Ping Windmiller Julia Ziegler Steffen Steffen.Ziegler@mpic.de 2026 Collecting Atmospheric Reference Data DowN in latitude leg, Cruise No. MSM140/2, 17.10.2025 - 05.11.2025, Brest (France) - Rio de Janeiro (Brazil) report MSM140/2 https://doi.org/10.48433/cr_msm140_2 45 pp 2026 nc file: ADCP current measurements (38 kHz) during RV MARIA S. MERIAN cruise MSM140_2 dataset https://download.pangaea.de/reference/139644/attachments/msm_140_2_vmadcp_38khz.nc Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 2026 Upper-ocean acoustic Doppler current profiler (38kHz-ADCP) underway measurements during MARIA S. MERIAN cruise MSM140_2 report Institute of Geosciences, Kiel University https://download.pangaea.de/reference/139643/attachments/msm_140_2_vmadcp_38khz_proc_report.pdf Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Anselm Norbert norbert.anselm@awi.de https://www.awi.de/ueber-uns/organisation/mitarbeiter/detailseite/norbert-anselm.html 0000-0003-0367-6850 2024 SOP 38kHz ADCP aboard of RV Maria S Merian (1.2)(vessel:maria_s_merian:adcp_38khz_1207) other Zenodo https://doi.org/10.5281/ZENODO.14532469 -33.88810000000001 -25.610900000000015 -17.0276 22.4117 -28.23536310873874 4.774219525423172 2025-10-24T08:54:00 2025-11-02T21:48:00 54.0 1622.0 horizontal profile DAM_Underway DAM Underway Research Data https://www.allianz-meeresforschung.de/kernbereiche/datenmanagement-und-digitalisierung#unterwegs DataHub DataHub Earth and Environment of the Helmholtz Association https://helmholtz.software/projects/datahub MSM140/2_0_Underway-10 22.4117 -26.8594 -5360.0 2025-10-24T08:54:00 -17.0276 -33.8881 -4464.0 2025-11-02T21:48:00 MSM140/2 MSM140/2 CARD-DN CARD-DN Brest, France 2025-10-17T00:00:00 2025-10-17 Rio de Janeiro, Brazil 2025-11-05T00:00:00 2025-11-05 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Oelker, Julia Oelker, Julia doi:10.48433/cr_msm140_2 https://download.pangaea.de/reference/138913/attachments/MSM140_2_nav.png doi:10.1594/PANGAEA.993340 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ https://registry.o2a-data.de/items/7471 4093976 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Date/Time LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Longitude DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Depth water [m] Current velocity, east-west Cur vel U cm/s Linear Velocity http://dbpedia.org/resource/Velocity Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Cur vel U [cm/s] Current velocity, north-south Cur vel V cm/s Linear Velocity http://dbpedia.org/resource/Velocity Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Cur vel V [cm/s] Quality flag, current velocity QF cur vel Seadatanet flag: Data quality control procedures according to SeaDataNet (2010) https://www.seadatanet.org/content/download/596/file/SeaDataNet_QC_procedures_V2_%28May_2010%29.pdf Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 UV QC flag meanings= 0:unknown, 1:good_data, 2:probably_good_data, 3:potentially_correctable_bad_data, 4:bad_data, 5:not_used, 6:not_used, 7:nominal_value, 8:interpolated_value, 9:missing_value QF cur vel Echo intensity Echo int cts Abundance or Count Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Echo int [cts] Echo intensity, cleaned Echo int clean cts Abundance or Count Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Echo int clean [cts] Backscatter, relative Backsc rel dB Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Backsc rel [dB] Pings, averaged to a double ensemble value Pings per ens # Abundance or Count Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 Pings per ens [#] Percent good pings good ping % Dimensionless Ratio ψ Vessel mounted Acoustic Doppler Current Profiler [38 kHz] VMADCP-38 Current meters Teledyne RDI Ocean Surveyor 38 kHz vessel-mounted ADCP http://vocab.nerc.ac.uk/collection/L22/current/TOOL0747/ Kopte Robert robert.kopte@ifg.uni-kiel.de 0000-0002-0822-2818 good ping [%] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels ProcLevel2 PANGAEA data processing level 2 https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_2 DAMUnderwayResearchData author101897 author104725 author104727 author105637 author114596 author114597 author52337 author60965 author64006 author68996 author70649 author79447 author85921 basis650 campaign3395036 campaign52723 curlevel30 event3306654 geocode1599 geocode1600 geocode1601 geocode1619 geocode8128 inst461 inst546 license21 method11769 method12398 param184543 param4544 param4548 param501421 param519038 param535736 param535737 param535738 pi52337 proclevel30 project4399 project5026 ref134166 ref137617 ref139643 ref139644 refds993684 term1073131 term2300802 term2606205 term43794 term43863 term43876 term43975 term44025 term52591 term67627 term77692 term77900 topotype4