WSR-74 A NWS Weather Surveillance Radar designed in 1974. It used to be part of weather radar network. It was replaced by WSR-88D units.
WSR-88D Weather Surveillance Radar - 1988 Doppler; NEXRAD unit.
WSR-57, WSR-74 - NWS Weather Surveillance Radar units, replaced by WSR-88D units.
WSR-88D - Weather Surveillance Radar - 1988 Doppler; NEXRAD unit.
RRainRARainRADAP IIRAdar DAta Processor II, attached to some WSR-57 and WSR-74 radar units.
RAdar DAta Processor II, attached to some WSR-57 and WSR-74 radar units. It automatically controls the tilt sequence and computes several radar-derived quantities at regular intervals, including VIL, storm tops, accumulated rainfall, etc.
RADAP II (RAdar DAta Processor II) - equipment attached to some WSR-57 and WSR-74 radar units.
Technologically-advanced weather radar being deployed to replace WSR-57 and WSR-74 units in the US. NEXRAD is a high-resolution Doppler radar with increased emphasis on automation, including use of algorithms and automated volume scan.
This processor was used on the WSR-57 and WSR-74C radars to indicate rainfall rates. It is still used occasionally on WSR-88D radar products. This processor contours radar reflectivity (in dBZ) into six VIP levels.
The NEXRAD project was started in the late 1980's and was designed to provide comprehensive radar coverage of the United States and to replace older WSR-57 and WSR-74 radar systems.
A network of advanced Doppler radars, known as the WSR-88D (Weather Surveillance Radar - 1988 Doppler), developed in the 1980s and implemented in the 1990s to replace the aging network of WSR-57 and WSR-74 radar systems.
 See also: WSR-57, Radar, Weather, Precipitation, Storm
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