Accurate precipitation measurements are vital for water resource management and weather forecasting. Satellite observations can provide global, uniformly distributed and almost real-time precipitation measurements. However, estimation of high-latitude (shallow) precipitation remains a challenge for satellite-based remote sensing. To improve the measurements, NASA launched the Global Precipitation Measurement (GPM) core satellite with instruments onboard which provide high-quality information about precipitation. This research project aims to quantify the quality of the GPM precipitation products and to improve the understanding of precipitation processes. Additionally, the potential of microwave links from commercial cellular communication networks to contribute to the GPM-products will be explored.