The Global Precipitation Measurement (GPM) mission is an international satellite mission aimed at unifying and advancing precipitation measurements from space for scientific research and societal applications. Precipitation significantly affects freshwater availability and has major socioeconomic impacts through extreme weather events. Accurate precipitation measurements are essential for understanding Earth's water and energy cycles, as well as for water resource management. While surface-based instruments are limited in their ability to measure precipitation over large regions, especially over oceans, satellite-based measurements offer a comprehensive view of global precipitation. Current satellite rainfall products use a variety of merging techniques and have varying levels of accuracy and sampling frequency. The GPM mission, launched in 2014, is designed to improve precipitation measurements using a constellation of microwave sensors, including the first spaceborne dual-frequency phased array precipitation radar (DPR) and a conical-scanning multichannel microwave imager (GMI). The GPM mission aims to provide more accurate and frequent microwave measurements within a unified observational framework. The mission's science objectives include better understanding of the global water cycle, new insights into storm structures and mesoscale dynamics, and new insights into precipitation microphysics. The GPM mission also has significant societal benefits, including improved hurricane and extreme weather monitoring, enhanced numerical weather prediction, and improved flood and freshwater resource forecasting. The GPM mission is a key component of international efforts to improve the accuracy and consistency of space-based precipitation measurements. The mission's data will be used to support a wide range of scientific and societal applications, including climate research, water resource management, and disaster monitoring. The GPM mission is expected to provide significant improvements in precipitation measurements and contribute to a better understanding of Earth's water and energy cycles.The Global Precipitation Measurement (GPM) mission is an international satellite mission aimed at unifying and advancing precipitation measurements from space for scientific research and societal applications. Precipitation significantly affects freshwater availability and has major socioeconomic impacts through extreme weather events. Accurate precipitation measurements are essential for understanding Earth's water and energy cycles, as well as for water resource management. While surface-based instruments are limited in their ability to measure precipitation over large regions, especially over oceans, satellite-based measurements offer a comprehensive view of global precipitation. Current satellite rainfall products use a variety of merging techniques and have varying levels of accuracy and sampling frequency. The GPM mission, launched in 2014, is designed to improve precipitation measurements using a constellation of microwave sensors, including the first spaceborne dual-frequency phased array precipitation radar (DPR) and a conical-scanning multichannel microwave imager (GMI). The GPM mission aims to provide more accurate and frequent microwave measurements within a unified observational framework. The mission's science objectives include better understanding of the global water cycle, new insights into storm structures and mesoscale dynamics, and new insights into precipitation microphysics. The GPM mission also has significant societal benefits, including improved hurricane and extreme weather monitoring, enhanced numerical weather prediction, and improved flood and freshwater resource forecasting. The GPM mission is a key component of international efforts to improve the accuracy and consistency of space-based precipitation measurements. The mission's data will be used to support a wide range of scientific and societal applications, including climate research, water resource management, and disaster monitoring. The GPM mission is expected to provide significant improvements in precipitation measurements and contribute to a better understanding of Earth's water and energy cycles.