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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 ...
CBS. CHICAGO (CBS) — Four people were killed in a mass shooting on a CTA Blue Line train in west suburban Forest Park on Monday morning. All four victims were passengers on a Blue Line train as ...
More than 50 people were arrested and at least four people suffered minor injuries during scuffles. In all, 74 people were arrested between Monday and Thursday, according to Chicago police. The ...
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 ...
The storm led to Denver seeing 0.3 inches (0.76 cm), which became their first snowfall of the winter, the latest date on record for this occurrence. [102] On December 10, Las Vegas dipped to 32 °F (0 °C) for the first time since February 5, 2020. [103] In Minnesota, some towns and cities received over one foot (30 cm) of snow.
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A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars and continuous-wave radars, which were formerly separate due to the complexity of the electronics.
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