Distance between ROV and sea ice from ROV survey PS122/2_18-10 on 2019-12-30, survey 1

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.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）科考航次期间，安装于遥控水下机器人（Remotely Operated Vehicle，ROV）之上的单波束向上指向声学声呐高度计（Tritech PA500），测量了该ROV与海冰下表面之间的距离。研究人员通过将ROV自身深度减去其与海冰下表面的距离，推导得到未校正ROV姿态（俯仰、横滚）的海冰吃水深度。本次发布的数据集已计入深度基准（ROV防撞杆）与该声呐高度计之间0.105米的偏移量。