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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 ...
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 Los Angeles mountains are ripe for fire after consecutive wet winters created an abundance of grass and brush that dried out during recent triple-digit heat. ... Doppler radar indicates we may ...
An early KECA-TV logo slide from the 1950s. Channel 7 first signed on the air under the call sign KECA-TV on September 16, 1949. [2] It was the last television station licensed to Los Angeles operating on the VHF band to debut and the last of ABC's five original owned-and-operated stations to make its debut, after San Francisco's KGO-TV, which signed on four months earlier.
The Los Angeles County Sheriff's Department locked down all of its jail facilities after the quake to do a damage assessment but quickly returned to normal operations after none was found.
These four images show a tornado-confirmed tornado tracking over Cairo, Georgia, on March 3, 2019. The top left image shows the rainfall, the top right shows the correlation coefficient, and the ...
Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect, which causes the received signal to have a different frequency from the transmitted signal, allowing ...
A traffic enforcement camera (also a red light camera, speed camera, road safety camera, road rule camera, photo radar, photo enforcement, Gatso, safety camera, bus lane camera, flash for cash, Safe-T-Cam, No contact apprehension camera depending on use) is a camera which may be mounted beside or over a road or installed in an enforcement ...