Distance between ROV and sea ice from ROV survey ARTofMELT2023/1_22-6 on 2023-06-02, 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 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，搭载于遥控无人潜水器（Remotely Operated Vehicle，ROV）的单波束朝上声学声呐高度计（Tritech PA500）完成了该潜水器与海冰下表面之间距离的测量。研究人员通过潜水器深度减去该海冰下表面距离推导得到海冰吃水，该计算未对遥控无人潜水器的姿态（俯仰、横滚）进行校正。本次发布的数据已计入深度参考基准（潜水器缓冲杆）与声呐高度计之间0.105米的偏移量。