AMPERE GRD & IRD Data (2009-Dec)

2009-Dec 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.2009年12月的AMPERE GRD与IRD数据集。 AMPERE IRD文件包含全球坐标系（地理坐标系与AACGM坐标系）下的半球delta-B观测数据。为适配拟合算法的使用需求，数据以2分钟的分辨率被划分为10分钟时长的数据块。在前期处理中被标记为"bad"的观测数据，在录入IRD数据集前已被剔除。 AMPERE GRD文件包含2分钟分辨率的半球delta-B数据与毕尔克电流（Birkeland current）拟合结果。