https://phys.org/news/2018-08-nasa-tropical-storm-miriam-formation.html

The GPM core observatory satellite saw the forming tropical storm earlier on Aug. 26 at 0223 UTC (Aug. 25 at 10:23 p.m. EDT). Heavy rainfall near the center of the forming tropical cyclone was examined with the GPM satellite's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments. GPM's Radar (DPR Ku Band) revealed that extremely heavy rainfall was occurring within the organizing storm. GPM's radar measured rain falling at over 190 mm (7.5 inches) per hour in one powerful storm.

GPM's radar data (DPR Ku Band) revealed the 3-D structure of precipitation within storms in the forming tropical cyclone. The most powerful storm in this simulated 3-D view from the north-northeast was shown by GPM's radar to reach heights of about 15 km (9.3 miles). Energy, known as the latent heat of condensation, is released when precipitation occurs within these tall storms. This energy provides some of the fuel needed to form and sustain tropical cyclones. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.