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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 ...
Website. www.tnvalleyweather.com. Tennessee Valley Weather is a television station owned by Tennessee Valley Media Group, headquartered in Lawrenceburg, Tennessee. It services North Alabama, Southern Tennessee, and Northeast Mississippi with daily weather updates and local severe weather information. The combined network broadcasts over-the-air ...
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 ...
However, since humans reflect far less radar energy than metal does, these systems require sophisticated technology to isolate human targets and moreover to process any sort of detailed image. Through-the-wall radars can be made with Ultra Wideband impulse radar, micro-Doppler radar, and synthetic aperture radar (SAR). [5] Imaging radar; 3D radar
The station's weather coverage utilized its first live doppler radar in 1958. [32] On April 16, 1998, WTVF was knocked off the air due to an F3 tornado striking downtown Nashville. This occurred while meteorologists Ron Howes and Joe Case were broadcasting live, showing the actual tornado from the station's SkyCam as it entered downtown Nashville.
WAFF's "First Alert Doppler Radar" (formerly "Live Stormtracker Doppler"), which was located in Limestone County just off of US 72, was destroyed when it was hit by a large and violent tornado (which produced EF5 damage in nearby Tanner, approximately 10 miles (16 km) away from the radar site) on April 27, 2011. A camera mounted on the tower ...
Damage. $2.3 billion (2010 USD) [1] Areas affected. Tennessee, south central Kentucky, northern Mississippi. The 2010 Tennessee floods were floods in Middle Tennessee, West Tennessee, south-central and western Kentucky and northern Mississippi areas of the United States of America as the result of torrential rains on May 1 and 2, 2010.
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.