10.1594/PANGAEA.975782Ólafsdóttir, Anna HAnna HÓlafsdóttir0000-0001-5048-2659Marine and Freshwater Research InstitutePampoulie, ChristopheChristophePampoulie0000-0001-6425-9060Marine and Freshwater Research InstitutePANGAEA2025acoustic dataIESSNSJuly 2021Northeast AtlanticEvent labelDATE/TIMEDate/time endLATITUDELatitude 2LONGITUDELongitude 2Depth, water, top/minimumDepth, water, bottom/maximumDEPTH, waterIdentificationData acquisition software (recording raw data)FrequencyNumber of pingsBeamwidth, alongshipBeamwidth, athwartshipGain, transducerSimrad correction factorPing intervalPulse duration, transmittedPower, transmittedSound velocity in waterSound absorptionCalibrationEchogram, raw formatEchogram, raw format (File Size)Echogram, raw format (MD5 Hash)Echosounder index fileEchosounder index file (File Size)Echosounder index file (MD5 Hash)Calibration file, xml formatCalibration file, xml format (File Size)Calibration file, xml format (MD5 Hash)Echosounder, Simrad EK80 (Kongsberg Maritime AS)Calculated average/mean valuesIESSNS_2021Arni FridrikssonSustainable Management of Mesopelagic Resources (SUMMER)2021-07-05T15:14:00/2021-07-26T12:47:00Dataset10.1594/PANGAEA.94298710.5281/ZENODO.13377783232342 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis data set has acoustic data during the Icelandic part of the International Ecosystem Summer Survey in Nordic Seas (IESSNS) July 5-26, 2021. The survey area was the shelf, shelf edge and deeper waters north, northeast, south and west of Iceland. The acoustic data was collected using a Simrad EK80 scientific echo sounder transducer with five transceiver units operating at different frequencies which are 18 kHz, 38 kHz, 70, kHz, 120 kHz and 200 kHz. Sampling depth is measured from transceiver surface which is located at 9 m depth in the water column. Maximum sampling depth was 500 m. The echo sounder was calibrated prior to survey as per manufacturer's instructions and a calibration file is included with submission, called calibration_2021.xml. Raw power (W), number of transducer segments and transceiver impedance (Ohm) were recorded. Information about the trawl catches and biological measurement of catch collected during the survey is in data set Ólafsdóttir and Pampoulie (2022, doi:10.1594/PANGAEA.942987). For detailed information about the survey see the survey report (Ólafsdóttir et al., 2022).-31.003440000000012-6.5399100000000262.6967769.29894Horizon 2020 of the European Commissionhttps://doi.org/10.13039/501100007601817806Sustainable management of mesopelagic resources