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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 ...
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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 ...
A NEXRAD weather radar currently used by the National Weather Service (NWS) is a 10 cm wavelength (2700-3000 MHz) radar capable of a complete scan every 4.5 to 10 minutes, depending on the number of angles scanned, and depending on whether or not MESO-SAILS [7] is active, which adds a supplemental low-level scan while completing a volume scan ...
Fox Weather 9 hours ago The Daily Weather Update from FOX Weather: Northeast wildfire danger remains as tropics near 'extreme' levels Top weather news for Thursday, Oct. 24, 2024.
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The earliest known use of the Eyewitness News name in American television was on April 6, 1959, when KYW-TV (now WKYC-TV) – at the time, based in Cleveland and owned by Westinghouse Broadcasting – launched the nation's first 90-minute local newscast (under the title Eyewitness), which was combined with the then 15-minute national newscast. [1]
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