Coastal zones, estuaries and inland waters are among the environments most affected by anthropogenic impact and climate change and are multi-risk due to coastline retreat, flooding and pollution. Accurate knowledge of water height is of major importance to analyze and understand causes and drivers of changes and to plan protection measures. Satellite delay doppler altimetry (DDA) provides improved results compared to conventional altimetry (CA). Goal of this study is the evaluation of the state of...