The TRMM satellite is descending, and the users of TRMM Precipitation Radar (PR) data should be aware that the last production orbit of public PR data was orbit #96230 from October 7th, 2014. From that point forward, the TRMM PR data is suspended because no useful cloud data are being observed. It is possible that PR data will again be made available when TRMM descends to the vicinity of its at-launch altitude of 350 km.
By Ellen Gray, NASA Goddard Space Flight Center
Original www.nasa.gov Article (published 11/27/12)
When it rains it pours, goes the saying, and for the last 15 years, the data on tropical rainfall have poured in. NASA's Tropical Rainfall Measuring Mission (TRMM) was launched on Nov. 27, 1997, and for the last decade and a half has enabled precipitation science that has had far reaching applications across the globe.
The TRMM satellite saw two tropical storms in the western Pacific Ocean as they were in early stages of development. These 3-D views were made from TRMM's Precipitation Radar (PR) data collected on 25 July 2011 at 1631 UTC and 26 July 2011 at 0049 UTC. Those data show that developing tropical storms NOCK-TEN (10W) and 11W both had towering convective storms near their centers of circulation that extended to heights above 15km (~9.3 miles).
Image showing TRMM's Precipitation Radar (PR) and the TRMM Microwave Imager (TMI) instrument resolving the intensifying thunderstorms near a tropical cyclone Magda’s eyewall off the northwest coast of Australia on January 21st, 2010.