Most aircraft carrying Doppler radar look like theyve grown a tail, developed a dorsal fin, or sprouted a giant pancake on their backs. But when the unmanned Global Hawk carries a radar system this summer, its cargo will be hard to see. The autonomous and compact High-altitude Imaging Wind and Rain Profiler, or HIWRAP, a dual-frequency conical-scanning Doppler radar, will hang under the aircrafts belly as it flies above hurricanes to measure wind and rain and to test a new method for retrieving wind data. HIWRAP is one of the instruments that will fly in this summer's mission to explore Atlantic Ocean hurricanes. NASA's Hurricane and Severe Storm Sentinel, or HS3, airborne mission will investigate tropical cyclones using a number of instruments and two Global Hawks. The HS3 mission will operate between Aug. 20 and Sept. 23. Read more a href= http //1.usa.gov/18TYPt7 rel= nofollow 1.usa.gov/18TYPt7 /a b a href= http //www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html re