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tation is not in the area. In "clear air mode," the radar Greater Milwaukee can detect very weak boundaries in the atmosphere, The chapter held a meeting on 27 November 1993 made visible by insects, pollen, or density discontinu- at the National Weather Service (NWS) Forecast ities. The radar is sensitive enough to pick up cirrus Office located near Sullivan, Wisconsin. The topic was clouds hundreds of miles away. the NWS's new Doppler radar system, which was installed at the Sullivan office in August. After welcom- Last explained that the radar system is made up of ing the capacity gathering, Ken Rizzo, NWS area three minicomputers. One, known as the Radar Data manager for Wisconsin, handed over the talk to Jeff Acquisition (RDA), actually controls the radar and Last, warning preparedness meteorologist at the of- gathers base data—reflectivity, velocity, and spec- fice. trum width. Ground clutter suppression is also per- Last began the afternoon's activities with a 90- formed by the RDA. The second, the Radar Product minute presentation that covered several aspects of Generator (RPG), generates more than 70 products radar meteorology and characteristics of the NWS that meteorologists use to evaluate the weather. The Doppler radar (known
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Feb 1, 1994
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