Distance between ROV and sea ice from ROV survey ARTofMELT2023/1_23-10 on 2023-06-07, 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 ARTofMELT2023 expedition in May and June 2023. 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.

2023年5月至6月的ARTofMELT2023科考航次中，搭载于遥控水下机器人（Remotely Operated Vehicle, ROV）的单波束向上指向声学声呐高度计（Tritech PA500），对该遥控水下机器人与海冰下表面之间的距离进行了测量。海冰吃水深度通过遥控水下机器人的深度减去其与海冰下表面的距离推导得到，该计算未针对遥控水下机器人的姿态（俯仰、横滚）进行校正。本次发布的数据已计入深度基准面（遥控水下机器人缓冲杆）与声呐高度计之间0.105米的偏移量。