Kopte, Robert (2022): ADCP current measurements (75 kHz) during RV MARIA S. MERIAN cruise MSM-X14 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.953085
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Upper-ocean velocities along the cruise track of Maria S. Merian cruise MSM-X14 were continuously collected by a vessel-mounted Teledyne RD Instruments 75 kHz Ocean Surveyor ADCP.
The transducer was located at 6.0 m below the water line. The instrument was operated in broadband mode with 16 m bins and a blanking distance of 8.0 m, while 50 bins were recorded using a pulse of 0.82 s.
The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Heading, pitch and roll data from the ship's gyro platforms and the navigation data were used by the data acquisition software VmDas internally to convert ADCP velocities into earth coordinates.
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 (0.70° +/- 0.4910°) and scale factor (1.0066 +/- 0.0070) of the Ocean Surveyor signal. The average interval was set to 120 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.
Data processing report:
Kopte, Robert (2022): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during Maria S. Merian cruise MSM_X14 - Data Processing Report. Institute of Geosciences, Kiel University, msm_X14_vmadcp_75khz_01_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.7525284
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: -0.178925 * Median Longitude: -10.141209 * South-bound Latitude: -17.855500 * West-bound Longitude: -21.545800 * North-bound Latitude: 24.607300 * East-bound Longitude: 8.252300
Date/Time Start: 2021-12-20T11:02:00 * Date/Time End: 2022-01-05T10:18:00
Minimum DEPTH, water: 30 m * Maximum DEPTH, water: 814 m
Event(s):
MSM-X14_0_Underway-3 * Latitude Start: 24.613824 * Longitude Start: -19.573171 * Latitude End: -17.855257 * Longitude End: 8.251929 * Date/Time Start: 2021-12-20T10:57:00 * Date/Time End: 2022-01-05T10:18:00 * Campaign: MSM-X14 (Transit, MSM104/2) * Basis: Maria S. Merian * Method/Device: Acoustic Doppler Current Profiler (ADCP) * Comment: Suspending data recording when entering EEZ Kapverden, and resuming it when leaving
MSM-X14_0_Underway-5 (MSM-X14_0_Underway-3) * Latitude Start: 24.607300 * Longitude Start: -19.579200 * Latitude End: -17.855500 * Longitude End: 8.252300 * Date/Time Start: 2021-12-20T11:02:00 * Date/Time End: 2022-01-05T10:18:00 * Sensor URI: https://hdl.handle.net/10013/sensor.698c50c3-bf18-4fc8-aef6-1ef23736c590 * Campaign: MSM-X14 (Transit, MSM104/2) * 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:
1974795 data points
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