https://phys.org/news/2018-09-nasajaxa-satellite-heavy-rainfall-tropical.html

GPM is an example of NASA's partnerships with other agencies around the world. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency or JAXA and the GPM core observatory satellite had an excellent view of tropical storm Isaac on Sept. 11, 2018 at 11:53 p.m. EDT (Sept. 12, 2018 at 0353 UTC).

The satellite revealed that, although expected to weaken, Isaac still contained some powerful convective storms. The GPM satellite's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments collected data that were used in an analysis of Isaac's rainfall. Those data showed that the heaviest rainfall within the tropical storm was located to the southeast of Isaac's center of circulation. GPM's radar (DPR Ku Band) measured rain falling at a rate of over 140 mm (5.5 inches) per hour when it sliced through an isolated convective burst southwest of Isaac's center.