Glaciers of High Mountain Asia (HMA) are an important runoff source for more than 1 billion people. Most glaciers have been losing mass at an accelerated rate. However, there is strong heterogeneity in mass loss and its drivers are still not well understood. The main aims of the related projects are to obtain the most detailed information about glacier mass changes using historical spy satellite data and more recent high-resolution stereo satellite data combined by SAR observations.