Distance between ROV and sea ice from ROV survey PS122/4_46-174 on 2020-07-10, survey 2

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月期间，在北极气候研究多学科漂流观测站（Multidisciplinary drifting Observatory for the Study of Arctic Climate, MOSAiC）考察任务中，安装于遥控水下机器人（remotely operated vehicle, ROV）的单波束向上指向声学声呐高度计（Tritech PA500），测量了该遥控水下机器人与海冰下表面之间的距离。海冰吃水深度通过从遥控水下机器人的深度值中减去至海冰下表面的距离推导得到，该计算过程未校正遥控水下机器人的姿态（俯仰、横滚）。本数据集已计入深度基准（遥控水下机器人防撞杆）与声呐高度计之间0.105米的偏移量。