The images show the surface winds, measured by SeaWinds on QuikSCAT's radar scatterometer, as red arrows. The wind data are superimposed on rainfall measurements made by the microwave imager on the Tropical Rain Measuring Mission (TRMM). The scale on the right shows the amount of rainfall in millimeters per hour.

QuikSCAT, launched in June 1999, and TRMM, launched 18 months earlier, provide the opportunity to observe both wind and rain before landfall. The ground tracks of the two NASA satellites are shown at the bottom of the images. The latitudes and longitudes of are given at the upper left and lower right corner of the images.

The SeaWinds on QuikSCAT project is managed for NASA's Earth Science Enterprise by NASA's Jet Propulsion Laboratory, Pasadena, Calif. TRMM is a joint US/Japanese mission managed by NASA's Goddard Space Flight Center, Greenbelt, MD.