Wave acquisition stereo-camera system measurements (WASS) from a voyage of the S.A. Agulhas II, July 2017

Between 07:00 and 08:00 UTC on the 4th July 2017, the South African icebreaker S.A. Agulhas II entered the Antarctic MIZ (62 South and 30 East) during an explosive polar cyclone.
A system of two GigE monochrome industrial CMOS cameras with a 2/3 inch sensor was installed on the icebreaker. The cameras provide a field of view of the ocean surface around the port side of the ship. Images were recorded with resolution 2448x2048 pixels and a sampling rate 2 Hz during daylight on the 4th July 2017.
The wave acquisition stereo-camera system (WASS; https://www.dais.unive.it/wass/) is used to reconstruct the water surface elevation.

Reconstructed surface elevations are given as .nc files (6).

The file name is “wass__20170704_hhmm.nc” where hh and mm denote the hour and minute in UTC of the start of each acquisition.
X_grid and Y_grid are the grid in x and y direction, resolution 1000mm or 1m.
Fps is the acquisition frequency, resolution 2Hz.
Time is a dummy variable, time is reconstructed from start time and fps.

Z is the surface elevation in space and time, in mm. Missing values are "Nan".
Other variables are WASS control variables.

Further details on the measurements and use of the data can be found at Alberello et al. “An extreme wave field in the winter Antarctic marginal ice zone during an explosive polar cyclone”.

2017年7月4日世界协调时（UTC）07:00至08:00期间，南非破冰船“S.A.阿古拉斯二世号（S.A. Agulhas II）”驶入坐标为南纬62°、东经30°的南极海冰边缘区（Antarctic Marginal Ice Zone，简称MIZ），彼时该区域正遭遇爆发性极地气旋。
该破冰船搭载了一套由两台千兆以太网（GigE）单色工业互补金属氧化物半导体（CMOS）相机组成的观测系统，相机配备2/3英寸传感器，拍摄视场覆盖船体左舷周边的洋面。2017年7月4日白昼时段，相机以2448×2048像素的分辨率、2Hz的采样率录制图像数据。
本数据集采用波浪采集立体相机系统（Wave Acquisition Stereo-Camera System，简称WASS；https://www.dais.unive.it/wass/）完成水面高程的重建工作。
重建得到的水面高程数据以.nc格式文件存储，共计6个文件。文件命名规则为"wass__20170704_hhmm.nc"，其中"hh"与"mm"分别代表单次采集起始时刻的世界协调时时分。
单个数据文件包含以下变量：X_grid与Y_grid为x、y方向的网格坐标，空间分辨率为1000mm（即1m）；Fps为采集频率，取值为2Hz；Time为虚拟变量，其数值可根据采集起始时刻与采集频率Fps重建得到；Z为时空域内的水面高程，单位为mm，缺失值以"Nan"标记；其余变量为WASS系统的控制变量。
有关该数据集的详细测量方案与数据使用方法，可参阅Alberello等学者发表的论文《An extreme wave field in the winter Antarctic marginal ice zone during an explosive polar cyclone》。