Using instruments that complement and correlate with those on the spacecraft, scientists on the ground gather similar precipitation data. These data are directly compared with that from satellites to improve the models relying on the satellite data. Overall, GV activity is designed to support algorithm development and product evaluation. There are a series of field campaigns that carry out these validation activities.
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The primary GPM instruments are the Dual-frequency Precipitation Radar (DPR) (active remote sensor) and GPM Microwave Imager (GMI) (passive remote sensor).
The GPM Core Observatory satellite carries two instruments (the GPM Microwave Imager (GMI) and the Dual-frequency Precipitation Radar (DPR)) that measure properties of precipitation from space using a combination of active and passive remote-sensing techniques.
The GPM Core Observatory or GPM CO is the name of the GPM’s satellite that carries the two instruments onboard, the GPM Microwave Imager and the Dual Frequency Precipitation Radar, which measure properties of precipitation from space.
GPM data is primarily used by operational forecasters, but the information also benefits numerical weather prediction models, climate prediction patterns, water resource management, crop monitoring, disaster response and preparation, and other research applications. In addition, scientists use GPM data to advance our understanding of precipitation and advance our understanding of Earth's water and energy cycle.
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