Grevemeyer, Ingo; Kopte, Robert (2021): ADCP current measurements (75 kHz) during Meteor cruise M170 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.938252
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2021-11-16 • DOI registered: 2021-12-28
Abstract:
Upper-ocean velocities along the cruise track of Meteor cruise M170 were continuously collected by a vessel-mounted Teledyne RD Instruments 75 kHz Ocean Surveyor ADCP. The transducer was located at 5.0 m below the water line. The instrument was operated in narrowband mode with 8 m bins and a blanking distance of 4.0 m, while 100 bins were recorded using a pulse of 1.43 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 ( -0.18° +/- 0.5601°) and scale factor (0.9992 +/- 0.0098) of the Ocean Surveyor signal. The average interval was set to 60 s.
Related to:
Grevemeyer, Ingo; Devey, Colin W; Klaucke, Ingo; Lange, Dietrich (2021): Geological and geophysical characterization of transform offsets, TRANSFORMERS, Cruise No. M170, 11.01.2021 - 14.02.2021, Emden (Germany) - Emden (Germany). METEOR-Berichte, Gutachterpanel Forschungsschiffe, M170, 32 pp, https://doi.org/10.48433/cr_m170
Other version:
nc file: ADCP current measurements (75 kHz) during RV METEOR cruise M170 [dataset]. met_170_vmadcp_75khz_01.nc
Data processing report:
Kopte, Robert (2021): Upper-ocean acoustic Doppler current profiler (75kHz-ADCP) underway measurements during Meteor cruise MET_170 - Data Processing Report. Institute of Geosciences, Kiel University, met_170_vmadcp_75khz_01_proc_report.pdf
Standard operating procedure:
Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 75kHz ADCP aboard of RV Meteor ( vessel:meteor:adcp_75khz_2175g). Zenodo, https://doi.org/10.5281/zenodo.7525347
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: 37.431269 * Median Longitude: -29.880653 * South-bound Latitude: 33.031200 * West-bound Longitude: -39.479100 * North-bound Latitude: 47.195000 * East-bound Longitude: -9.802300
Date/Time Start: 2021-01-14T17:01:00 * Date/Time End: 2021-02-06T10:29:00
Minimum DEPTH, water: 17 m * Maximum DEPTH, water: 809 m
Event(s):
M170_0_Underway-1 * Latitude Start: 47.195000 * Longitude Start: -9.802300 * Latitude End: 44.985000 * Longitude End: -13.118500 * Date/Time Start: 2021-01-14T17:01:00 * Date/Time End: 2021-02-06T10:29:00 * Campaign: M170 (GPF 20‐3_090, TRANSFORMERS) * Basis: Meteor (1986) * Method/Device: Acoustic Doppler Current Profiling (ADCP)
Comment:
Velocity quality flagging is based on following threshold criteria: abs(UC) or abs(VC) > 2.0 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)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
9276100 data points
Download Data
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