http://bolin.su.se/data/jakobsson-2019-acoustic-1 Martin Jakobsson, Christian Stranne Bolin Centre Database 2019 Datafile Marine Hydrography Simrad EK80 Midwater Water column Acoustic Single beam Echo sounder Southern Quark Åland Sea Baltic Sea Earth science > Oceans > Ocean acoustics Martin Jakobsson 2019-07-06T15:35:37+00:00 English 1 None, but please cite Jakobsson et al. (2019) Midwater data from a <a href="https://www.simrad.com/ek80">Simrad EK80</a> wide-band split-beam sonar with center frequancies at 70 kHz and 200 kHz. The data are logged in Kongsberg's raw format (.raw), which is described by <a href="https://www.kongsberg.com">Kongsberg</a>. Data was collected from the ship R/V Electra in the region of the Southern Quark between Sweden and Åland (from Aug 6 to 17, 2017). The data corresponds to the two transects shown in Figure 8 in Jakobsson et al. (2019).