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NASA calculated the rainfall rates occurring in Tropical Cyclone Joaninha as it moved through the open waters of the Southern Indian Ocean.
Data from the Global Precipitation Measurement mission (GPM) is used to develop rainfall total estimations and provided a look at rain Joaninha was generating.
GPM - Mission - NASA - Japan - Aerospace
GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA. GPM also utilizes a constellation of other satellites to provide a global analysis of precipitation that are used in the IMERG calculation. NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) data were used to estimate the rate in which rain was falling in Joaninha on March 24. Rainfall rates were often greater than 0.75 inches (19 mm) per hour around the center.
What Is IMERG?
NASA - Goddard - Space - Flight - Center
At NASA's Goddard Space Flight Center in Greenbelt, Maryland, those data are incorporated into NASA's IMERG or Integrated Multi-satellitE Retrievals for GPM. IMERG is used to estimate precipitation from a combination of passive microwave sensors, including the Global Precipitation Measurement (GPM) mission's core satellite's GMI microwave sensor and geostationary IR (infrared) data. IMERG real-time data are generated by NASA's Precipitation Processing System every half hour and are normally available within six hours.
IMERG creates a merged precipitation product from the GPM constellation of satellites. These satellites include DMSPs from the U.S....
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