Mohrholz, Volker; Kopte, Robert; Heene, Toralf (2022): ADCP current measurements (75 kHz working area dataset) during RV MARIA S. MERIAN cruise MSM105 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.946298
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2022-07-13 • DOI registered: 2022-08-12
Abstract:
Upper-ocean velocities along the cruise track of RV MARIA S. MERIAN cruise MSM105 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 8 m bins and a blanking distance of 8.0 m, while 100 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 (0.78° +/- 0.6410°) and scale factor (1.0089 +/- 0.0146) of the Ocean Surveyor signal. The average interval was set to 60 s.
Related to:
Mohrholz, Volker; Kopte, Robert; Heene, Toralf (2022): ADCP current measurements (75 kHz transit dataset) during RV MARIA S. MERIAN cruise MSM105 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.946310
Other version:
nc file: ADCP current measurements (75 kHz working area dataset) during RV MARIA S. MERIAN cruise MSM105 [dataset]. msm_105_vmadcp_75khz_01.nc
Data processing report:
Kopte, Robert (2022): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during Maria S. Merian cruise MSM_105 (Dataset 1/2) - Data Processing Report. Institute of Geosciences, Kiel University, msm_105_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: -23.068340 * Median Longitude: 12.870551 * South-bound Latitude: -27.038600 * West-bound Longitude: 8.689400 * North-bound Latitude: -17.689600 * East-bound Longitude: 15.165900
Date/Time Start: 2022-01-11T12:39:00 * Date/Time End: 2022-02-12T23:59:00
Minimum DEPTH, water: 22 m * Maximum DEPTH, water: 806 m
Event(s):
MSM105_0_Underway-3 * Latitude: -22.990280 * Longitude: 14.263570 * Date/Time: 2022-01-11T12:36:44 * Elevation: -97.0 m * O2A Registry URI: https://hdl.handle.net/10013/sensor.698c50c3-bf18-4fc8-aef6-1ef23736c590 * Location: South Atlantic Ocean * Campaign: MSM105 (BUSUC II) * Basis: Maria S. Merian * Method/Device: Acoustic Doppler Current Profiler (ADCP)
Comment:
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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Kopte, Robert | Geocode | ||
| 2 | LATITUDE | Latitude | Kopte, Robert | Geocode | ||
| 3 | LONGITUDE | Longitude | Kopte, Robert | Geocode | ||
| 4 | DEPTH, water | Depth water | m | Kopte, Robert | Geocode | |
| 5 | Current velocity, east-west | Cur vel U | cm/s | Kopte, Robert | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) | |
| 6 | Current velocity, north-south | Cur vel V | cm/s | Kopte, Robert | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) | |
| 7 | Quality flag, current velocity | QF cur vel | Kopte, Robert | Calculated | 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 | |
| 8 | Echo intensity, relative | Echo int rel | cts | Kopte, Robert | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) | |
| 9 | Pings, averaged to a double ensemble value | Pings per ens | # | Kopte, Robert | Vessel mounted Acoustic Doppler Current Profiler [75 kHz] (VMADCP-75) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
6451565 data points
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