RV Investigator Voyage IN2022_V08 Magnetometer Data

This record describes magnetometer data collected on RV Investigator voyage IN2022_V08, titled "Biodiversity Assessment of Australia’s Indian Ocean Territories", which departed Darwin on September 30 and returned to Fremantle on November 3, 2022. This was a continuation of voyage IN2021_v04.The SeaSPY2 magnetometer uses an omnidirectional Overhauser sensor that requires no realignment or recalibration and has no heading error. The instrument has an absolute accuracy of 0.1 nT, sensor sensitivity of 0.01 nT and resolution of 0.001 nT.Data are stored in .CSV and .MMS data files at CSIRO. 92 MB of raw data was acquired in this dataset. No processing has been conducted on this data.The magnetometer was towed ~300 m astern of the ship and a layback value of 361 was applied to the magnetometer data. This was the total distance behind the ship's positioning reference point. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.

本记录描述了搭载于“调查者号”（RV Investigator）科考船的IN2022_V08航次所采集的磁力计（magnetometer）数据，该航次主题为“澳大利亚印度洋领地生物多样性评估”，于2022年9月30日从达尔文港起航，同年11月3日返回弗里曼特尔港，为IN2021_v04航次的延续任务。本次使用的SeaSPY2磁力计搭载全向奥弗豪泽传感器（Overhauser sensor），无需重新校准或对准，且无航向误差；该仪器的绝对精度为0.1纳特斯拉（nT），传感器灵敏度达0.01纳特斯拉，分辨率为0.001纳特斯拉。数据集的原始数据以.CSV和.MMS格式存储于联邦科学与工业研究组织（CSIRO），本次共采集到92 MB原始数据，且未进行任何处理。该磁力计被拖曳于科考船船尾约300米处，磁力计数据已应用361的后拖补偿值（即相对于船舶定位参考点的总后向距离），本数据集的更多详细信息可查阅GSM数据采集与处理报告。