AMPERE GRD & IRD Data (2013-Apr)

2013-Apr AMPERE GRD and IRD data. AMPERE IRD files contain hemispheric delta-B observations in global coordinates (geographic and AACGM). Data are blocked into 10-minute 'chunks' at 2-minute resolution for use in the fitting algorithm. Measurements flagged 'bad' in the earlier processing are removed prior to entry in IRD. AMPERE GRD files contain hemispheric delta-B and Birkeland current fits at 2-minute resolution.2013年4月的AMPERE GRD与IRD数据集。AMPERE IRD文件包含全球坐标系（地理坐标与AACGM坐标）下的半球delta-B观测数据。数据被划分为时长10分钟的数据块，时间分辨率为2分钟，以供拟合算法使用。在前期处理中被标记为“不良”的测量数据，在录入IRD数据集前已被剔除。AMPERE GRD文件包含时间分辨率为2分钟的半球delta-B与毕尔克伦德电流（Birkeland current）拟合结果。