NEXRAD or Nexrad (Next-Generation Radar) is a network of 160 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transp... Found on http://en.wikipedia.org/wiki/NEXRAD
(from the article `radar`) The pulse Doppler weather radars employed by the National Weather Service, which are known as Nexrad, make quantitative measurements of ... Found on http://www.britannica.com/eb/a-z/n/36