Landsat Geometric Median and Absolute Deviations (GeoMAD) over the Pacific.

The GeoMAD is derived from Landsat surface reflectance data. The data are masked for cloud, shadows and other image artefacts using the associated pixel quality product to help provide as clear a set of observations as possible from which to calculate the medians.GeoMAD数据集源自陆地卫星（Landsat）地表反射率数据。该数据集借助配套的像素质量产品，对云、阴影及其他图像伪影进行掩膜处理，以尽可能获取清晰的观测集，用于计算中值。