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Proud, Roland; Rommel, Alix Claire Maria (2025): Raw EK80 echosounder narrowband data collected during RV Meteor cruise 'Assessing Oceanic Impacts on Arrival and Transport of European Eel Larvae' (M185) in 2022 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.973496

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Published: 2025-04-22 • DOI registered: 2025-05-21

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Abstract:
These data consist of both underway and station-based echosounder observations collected during the 2022 M185 (Assessing Oceanic Impacts on Arrival and Transport of European Eel Larvae) cruise (29th October 2022 to the 26th November 2022) on the RV Meteor. Narrowband (38 and 200 kHz) underway acoustic data were collected continuously using a Simrad EK80 echosounder system (Kongsberg ES38-18/200-18C combined transducer and Simrad WBT Mini transceiver). The recording depth for the 2 frequencies was 1200 m, but the useful observation range (based on signal-to-noise ratios) was 1000 m and 200 m for the 38 and 200 kHz echosounders respectively. A calibration was carried out on the 17th November 2022, but the results (as assessed by the model RMS value) were deemed to be poor and were not used.
Keyword(s):
Carbon pump; DVM; fish ecology; Iberian Peninsula; mesopelagic
Project(s):
Sustainable Management of Mesopelagic Resources (SUMMER)
Funding:
Horizon 2020 (H2020), grant/award no. 817806: Sustainable management of mesopelagic resources
Coverage:
Median Latitude: 39.623441 * Median Longitude: -8.654926 * South-bound Latitude: 34.483230 * West-bound Longitude: -11.398550 * North-bound Latitude: 47.512880 * East-bound Longitude: -2.553930
Date/Time Start: 2022-11-04T11:00:00 * Date/Time End: 2022-11-24T06:12:00
Minimum DEPTH, water: 499.987595 m * Maximum DEPTH, water: 599.981440 m
Event(s):
M185_0_Underway-2 * Latitude Start: 47.547850 * Longitude Start: -6.566700 * Latitude End: 35.919367 * Longitude End: -3.816000 * Date/Time Start: 2022-11-04T11:00:00 * Date/Time End: 2022-11-24T06:12:00 * Elevation: -192.0 m * Campaign: M185 (ASSOCIATE) * Basis: Meteor (1986) * Method/Device: Echosounder, Simrad EK80 (Kongsberg Maritime AS)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventProud, Roland
2Date/time startDate/time startProud, Roland
3Date/time endDate/time endProud, Roland
4LATITUDELatitudeProud, RolandGeocode
5Latitude 2Latitude 2Proud, Roland
6LONGITUDELongitudeProud, RolandGeocode
7Longitude 2Longitude 2Proud, Roland
8IdentificationIDProud, Rolandchannel
9Data acquisition software (recording raw data)DASProud, RolandEchosounder, Simrad EK80 (EK80)
10FrequencyFrequencykHzProud, RolandEchosounder, Simrad EK80 (EK80)
11Number of pingsPingsProud, RolandEchosounder, Simrad EK80 (EK80)
12Beamwidth, alongshipBWALdegProud, RolandEchosounder, Simrad EK80 (EK80)
13Beamwidth, athwartshipBWATdegProud, RolandEchosounder, Simrad EK80 (EK80)
14Gain, transducerGTdB re 1Proud, RolandEchosounder, Simrad EK80 (EK80)
15Simrad correction factorSCFdB re 1/mProud, RolandEchosounder, Simrad EK80 (EK80)
16Ping intervalPing intsProud, Roland
17Pulse duration, transmittedPDTmsProud, RolandEchosounder, Simrad EK80 (EK80)
18Power, transmittedPower tmWProud, RolandEchosounder, Simrad EK80 (EK80)
19Sound velocity in waterSVm/sProud, RolandEchosounder, Simrad EK80 (EK80)
20Sound absorptionSAdB/mProud, RolandEchosounder, Simrad EK80 (EK80)
21Depth, water, top/minimumDepth water topmProud, Roland
22Depth, water, bottom/maximumDepth water botmProud, Roland
23DEPTH, waterDepth watermProud, RolandCalculatedGeocode
24CalibrationCalibrationProud, RolandEchosounder, Simrad EK80 (EK80)
25Echogram, raw formatEcho rawProud, RolandEchosounder, Simrad EK80 (EK80)
26Echogram, raw format (File Size)Echo raw (Size)BytesProud, RolandEchosounder, Simrad EK80 (EK80)
27Echogram, raw format (MD5 Hash)Echo raw (Hash)Proud, RolandEchosounder, Simrad EK80 (EK80)
28Echosounder index fileEcho idxProud, RolandEchosounder, Simrad EK80 (EK80)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
15488 data points

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