Pälike, Heiko; Kopte, Robert (2023): Shipboard ADCP current measurements (75 kHz) during RV MARIA S. MERIAN cruise MSM116 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962731
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2023-10-13 • DOI registered: 2023-11-11
Abstract:
Current velocities of the upper water column along the cruise track of R/V Maria S. Merian cruise MSM116 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. Beam velocities as recorded by the data acquistion software VmDAS were transformed to ship coordinates and after merging with the navigation data from the ship's Motion Reference Unit and Global Positioning systems into earth coordinates. Single-ping data / ping ensembles were screened for bottom signals and, where appropriate, a bottom mask was manually processed. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Accuracy of the ADCP 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 post-processing included water track calibration of the misalignment angle (-47.4945° +/- 0.5545°) and scale factor (1.0045 +/- 0.0101) of the Ocean Surveyor signal. The velocity data were averaged in time using an average interval of 60 s. Velocity quality flagging is based on following threshold criteria: abs(UC) or abs(VC) > 1.5 m/s, rms(UC_z) or rms(VC_z) > 0.3.
Related to:
Pälike, Heiko; Kopte, Robert (2023): Shipboard ADCP current measurements (38 kHz) during RV MARIA S. MERIAN cruise MSM116 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962562
Other version:
nc file: ADCP current measurements (75 kHz) during RV MARIA S. MERIAN cruise MSM116 (2023). msm_116_vmadcp_75khz.nc
Data processing report:
Kopte, Robert (2023): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during MARIA S. MERIAN cruise MSM116. Institute of Geosciences, Kiel University, msm_116_vmadcp_75khz_proc_report.pdf
Standard operating procedure:
Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 75kHz ADCP aboard of RV Maria S Merian ( vessel:maria_s_merian:adcp_75khz_2096). Zenodo, https://doi.org/10.5281/zenodo.7022743
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: -17.187354 * Median Longitude: -32.380069 * South-bound Latitude: -34.855300 * West-bound Longitude: -47.607400 * North-bound Latitude: -11.672700 * East-bound Longitude: -26.149000
Date/Time Start: 2023-04-05T10:00:00 * Date/Time End: 2023-05-06T05:13:00
Minimum DEPTH, water: 22.0 m * Maximum DEPTH, water: 814.0 m
Event(s):
MSM116_0_Underway-4 * Latitude Start: -33.297680 * Longitude Start: -47.605850 * Latitude End: -17.579520 * Longitude End: -31.193030 * Date/Time Start: 2023-04-05T10:00:41 * Date/Time End: 2023-04-15T11:00:00 * O2A Registry URI: hdl:10013/sensor.698c50c3-bf18-4fc8-aef6-1ef23736c590 * Campaign: MSM116 (RIO GRANDE, RIOGRANDERISE) * Basis: Maria S. Merian * 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:
18739880 data points
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