Distance between ROV and sea ice from ROV survey PS122/2_20-101 on 2020-01-18, survey 1@en

The distance between a remotely operated vehicle (ROV) and the sea-ice underside was measured by a single-beam upward-looking acoustic sonar altimeter (Tritech PA500) attached to the ROV during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition between November 2019 and September 2020. Sea-ice draft was derived by subtracting the distance to the sea-ice underside from the ROV depth, uncorrected for ROV attitude (pitch, roll). An offset between the depth reference (ROV bumper bars) and the altimeter of 0.105 m is accounted for in the presented data.在2019年11月至2020年9月的北极气候研究多学科漂流观测站（MOSAiC）考察期间，搭载于遥控水下机器人（remotely operated vehicle, ROV）的单波束朝上声学声呐高度计（Tritech PA500）完成了该遥控水下机器人与海冰下表面间距的测量工作。海冰吃水深度通过遥控水下机器人的作业深度减去其至海冰下表面的距离推导得出，该计算未对遥控水下机器人的姿态（纵倾、横摇）进行校正。本次公布的数据已计入深度参考基准（遥控水下机器人缓冲杆）与声呐高度计之间0.105米的安装偏移量。