TRMM rainfall images are false-colored with yellow, green and red areas, which indicate rainfall between 20 and 40 millimeters (.78 to 1.57 inches) per hour.
TRMM captured Super Typhoon Choi-Wan heavy rainfall on Sept. 17 at 2:34 a.m. EDT. The yellow and green areas indicate moderate rainfall between .78 to 1.57 inches per hour. Red areas near Choi-Wan\'s center are considered heavy rainfall at almost 2 inches per hour. Credit: NASA/SSAI, Hal Pierce
Dark red areas are considered heavy rainfall, as much as 2 inches of rain per hour.
Rain rates in the center of the swath are from the TRMM Precipitation Radar (PR), the only spaceborne radar of its kind, while those in the outer portion are from the TRMM Microwave Imager (TMI).
The rain rates are overlaid on infrared (IR) data from the TRMM Visible Infrared Scanner (VIRS).
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