SAIL - Atmospheric electric field data

Quality-controlled observations of the atmospheric electric field measured on board the sail ship NRP Sagres during the 2020 SAIL campaign. Data are from two similar instruments, located at different heights of the ship's mast, 20m (primary sensor, E1) and 5m (secondary sensor, E2), after application of height and bias corrections, respectively. Missing values are denoted by NA.Datafiles structure:column 1: date/time (yyyy-mm-dd HH:MM:SS);column 2: potential gradient 1-minute average (V/m);column 3: potential gradient 1-minute standard deviation (V/m);column 4: longitude (degrees E);column 5: latitude (degrees N);column 6: flag signaling fully ocean day (=1) and fully or partially land day (=0).

本数据集包含2020年SAIL科考航次期间，在风帆船NRP Sagres上实测并经质量控制的大气电场观测数据。数据源自两台规格一致的仪器，分别布设于船桅的20米（主传感器E1）与5米（副传感器E2）高度处，且两台仪器已分别完成高度校正与偏差校正。缺失值以NA标记。数据文件列结构如下：
第1列：日期/时间，格式为yyyy-mm-dd HH:MM:SS；
第2列：电势梯度1分钟平均值，单位为V/m；
第3列：电势梯度1分钟标准差，单位为V/m；
第4列：经度（东经度数）；
第5列：纬度（北纬度数）；
第6列：标识旗标，取值为1时代表全程远洋观测日，取值为0时代表全程或部分近岸观测日。