This is Hurricane Alma on May 29, 2002 as seen by TRMM and GOES.
The animation zooms down to Hurricane Alma and then scans across the cloud tops to reveal the underlying rain structure. There are three isosurfaces defined (Yellow = 0.5 inches/hour, Green = 1.0 inches/hour, and Red = 2.0 inches/hour)
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 220.127.116.11.0