http://www.slate.com/articles/video/video/2015/09/kilo_satellite_view_21_day_storm_kilo_excites_meteorologists_video.html

Meteorologists at NASA’s Global Precipitation Measurement (GPM) project were particularly thrilled to have the chance to gather data from tropical storm Kilo, and the video above explains why. Its 21-day life cycle allowed the GPM Core Observatory to repeatedly pass over the storm, capturing a vast array of images that added up to an unusually comprehensive view of how a storm develops, lives, and dies.