Swath sonar bathymetry during POLARSTERN cruise ANT-XXII/2 (PS67) with links to multibeam raw data files

Multibeam data were measured during R/V Polarstern cruise ANT-XXII/2 along track lines of approximately 6800 NM total length during transits and the Ice Station POLarstern (ISPOL) experiment. Data were achieved during the transit from Cape Town via Bouvet Island towards Antarctic Peninsula for three weeks, crossing Agulhas Ridge, Agulhas Basin and Mid-Atlantic Ridge, and during the transit to Cape Town via South Georgia for two weeks. During the ISPOL station, data were gained while the vessel was drifting for five weeks anchored to an ice floe in the south-western Weddell Sea, starting at 68°13'S/54°47'W. The multibeam sonar system Hydrosweep DS-2 was operated using 59 beams and 90° aperture angle. The refraction correction was achieved using CTD profiles or utilizing the system's own cross fan calibration. The quality of data might be reduced during bad weather periods or adverse sea ice conditions. The dataset contains raw data that are not processed and thus may contain errors and blunders in depth and position.

本数据集的多波束测深数据采集于"极地号"（Research Vessel Polarstern，缩写R/V Polarstern）科考航次ANT-XXII/2，采集范围为总长度约6800海里（nautical mile，缩写NM）的测线，涵盖航行过境阶段与冰站POLARSTERN（Ice Station POLarstern，缩写ISPOL）实验阶段。航行过境阶段的采集工作分为两段航程：第一段为从开普敦经布韦岛前往南极半岛的三周航行期间，途经阿古拉斯海岭、阿古拉斯海盆与大西洋中脊；第二段为从南乔治亚岛返程开普敦的两周航行期间。冰站实验阶段的数据采集于威德尔海西南部的浮冰锚定作业期间，科考船在此锚定浮冰并漂流五周，作业起始坐标为南纬68°13′、西经54°47′。本次数据采集采用的多波束声呐系统为Hydrosweep DS-2，配置59条接收波束，波束开角为90°。数据的折射校正采用CTD（Conductivity-Temperature-Depth，温盐深仪）剖面数据完成，或依托系统自带的交叉扇形校准流程实现。在恶劣天气或不利海冰条件下，数据质量可能出现下降。本数据集包含未经过任何处理的原始数据，因此可能存在深度与位置相关的误差与粗差。