Research Research SP1.1: Multifrequency digital radar systems SP1.2: SAR tomography SP1.3: Analysing radargrams with deep learning SP2.1: Glacier outlines from optical and SAR imagery by deep learning SP2.2: Radar penetration of TanDEM-X on glaciers & ice capsSAR tomography for 3D imaging of snow and firn structures SP2.3: Improved volume to mass conversion SP3.1: Targetting snow drift and refreezing in glacier mass budgets with machine learning SP3.2: Reconciling machine learning and glacier system modelling SP3.3: Mass movement assessment and modelling in recent ice-free areas