description GPM Core Observatory Overview
The Global Precipitation Measurement (GPM) Core Observatory is a joint environmental satellite project developed by NASA and the Japan Aerospace Exploration Agency (JAXA). Launched in February 2014, the spacecraft functions as the central calibration reference for an international constellation of weather satellites. It is equipped with an advanced dual-frequency precipitation radar and a microwave imager designed to accurately measure global rain and snowfall rates. The collected data provides scientists and meteorologists with detailed, near-real-time information to improve severe weather forecasting and advance global climate models.
help GPM Core Observatory FAQ
What does the GPM Core Observatory measure?
The spacecraft measures the location, intensity and three-dimensional structure of rain and snow. Its observations help calibrate a wider international satellite constellation that produces frequent global precipitation maps.
Which agencies built the GPM Core Observatory?
GPM is a joint mission of NASA and the Japan Aerospace Exploration Agency, commonly called JAXA. Its principal instruments are the NASA-provided GPM Microwave Imager and the JAXA-provided Dual-frequency Precipitation Radar.
How did GPM improve on the earlier TRMM mission?
GPM expanded precipitation measurement beyond the tropical focus of the Tropical Rainfall Measuring Mission. After launching in 2014, it also improved the observation of light rain and falling snow at higher latitudes.
How are GPM measurements used in weather forecasting?
Forecasters and researchers use GPM data to track storms, estimate rainfall accumulation and improve flood and landslide models. The mission also supplies a consistent precipitation record for studying climate and the global water cycle.
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