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Doppler effect. The emitted signal toward the car is reflected back with a variation of frequency that depends on the speed away/toward the radar (160 km/h). This is only a component of the real speed (170 km/h). The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the difference ...
Clockwise loop: The tornado at high-end EF4 intensity going through Washington; devastating damages done to the Georgetown Commons Apartment complex; Satellite imagery of the Trail Edge Neighborhood a day after the tornado; Doppler Radar imagery of the Washington, IL tornado, showing a debris ball on reflectivity with a deep correlation ...
NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 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 Transportation, and the U.S. Air Force within the ...
Pulse-Doppler systems measure the range to objects by measuring the elapsed time between sending a pulse of radio energy and receiving a reflection of the object. Radio waves travel at the speed of light, so the distance to the object is the elapsed time multiplied by the speed of light, divided by two – there and back.
Pulse-Doppler signal processing. Pulse-Doppler signal processing is a radar and CEUS performance enhancement strategy that allows small high-speed objects to be detected in close proximity to large slow moving objects. Detection improvements on the order of 1,000,000:1 are common. Small fast moving objects can be identified close to terrain ...
2011 New England tornado outbreak. On June 1, 2011, a total of six tornadoes touched down in both western Massachusetts and western Maine. The strongest was a long-track, high-end EF3 tornado that caused significant damage to the city of Springfield, Massachusetts as well as several adjacent cities and towns.
Weather radar in Norman, Oklahoma with rainshaft Weather (WF44) radar dish University of Oklahoma OU-PRIME C-band, polarimetric, weather radar during construction. Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.).
The AccuWeather Network is an American cable and satellite television network launched, operated and owned by AccuWeather. The network broadcasts live and pre-recorded national and regional weather forecasts, analysis of ongoing weather events, and weather-related news. The network's studio and master control facilities are based at AccuWeather ...