A NASA polar-orbiting satellite, launched (together with Calipso) on 26 April 2006, and now part of the Afternoon-Train constellation. It is specifically designed to monitor clouds with a millimetre-wavelength radar system, and thus provide data about a poorly understood aspect of global climate models. The short wavelength enables it to detect much smaller liquid and frozen cloud particles than previous radars. It flies in close formation with Calipso so that the two satellites obtain essentially simultaneous data of the same region of the atmosphere. See also Aqua; Aura; Orbiting Carbon Observatory; Parasol.
Subjects: Meteorology and Climatology — Astronomy and Astrophysics.