RV Investigator Voyage IN2019_V01 SH90 omnidirectional fishery Echosounder Data

This record describes Simrad SH90 high definition omnidirectional fishery sonar, 114 kHz data collected on RV Investigator voyage IN2019_V01, titled "The availability of Antarctic krill to large predators and their role in biogeochemical recycling in the Southern Ocean" which departed Hobart on the 19th January, 2019 and returned to Hobart on the 5th of March, 2019.

The Simrad SH90 provides detailed information about school density, speed, depth, heading and size, with an operational frequency of 114 kHz. The SH90 was logged sporadically to guide krill fishing, and settings were updated/changed constantly with respect to angles and frequencies in real time to point to the krill schools while trawling.

Data are stored in Simrad *.raw format at CSIRO. There are 12,861 files totalling 378 GB of raw data in this dataset.

The data is available "as is" without any Quality Control measures, post processing or standardized settings.

Additional information regarding this dataset, including the settings used, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

本记录描述了Simrad SH90高清全向渔业声呐于IN2019_V01航次（调查者号科考船，RV Investigator）采集的114 kHz数据。该航次主题为“南极磷虾对大型捕食者的可获得性及其在南大洋生物地球化学循环中的作用”，于2019年1月19日从霍巴特启航，2019年3月5日返回霍巴特。

Simrad SH90的工作频率为114 kHz，可提供鱼群密度、速度、深度、航向及大小的详细信息。该设备被间歇性记录以指导磷虾捕捞；拖网作业期间，为锁定磷虾群，其角度与频率设置会实时持续更新/调整。

数据以Simrad *.raw格式存储于CSIRO。本数据集包含12,861个文件，原始数据总量达378 GB。

数据按原样提供，未经过任何质量控制（Quality Control）措施、后处理或标准化设置。

关于本数据集的更多信息（包括所用设置）载于GSM数据采集与处理报告中。其他数据产品可按需提供。