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  2. WTVD - Wikipedia

    en.wikipedia.org/wiki/WTVD

    WTVD (channel 11) is a television station licensed to Durham, North Carolina, United States, serving as the ABC outlet for the Research Triangle area. Owned and operated by the network's ABC Owned Television Stations division, it maintains business offices and master control facilities on Liberty Street in downtown Durham, with newscasts originating from studios on Fayetteville Street in ...

  3. Doppler radar - Wikipedia

    en.wikipedia.org/wiki/Doppler_radar

    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 ...

  4. NOAA: Doppler radar indicates we may be underestimating ... - AOL

    www.aol.com/news/noaa-doppler-radar-indicates...

    A recent study by researchers at NOAA’s National Severe Storms Laboratory using Doppler Radar scans suggests the current methods of measuring tornadoes may be underestimating the twister's true ...

  5. Continuous-wave radar - Wikipedia

    en.wikipedia.org/wiki/Continuous-wave_radar

    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 ...

  6. Mobile radar observation of tornadoes - Wikipedia

    en.wikipedia.org/wiki/Mobile_radar_observation...

    Mobile doppler weather radars have been used on dozens of scientific and academic research projects from their invention in the late 1900s. [1] One problems facing meteorological researchers was the fact that mesonets and other ground-based observation methods were being deployed too slow in order to accurately measure and study high-impact atmospheric phenomena. [1]

  7. Radar signal characteristics - Wikipedia

    en.wikipedia.org/wiki/Radar_signal_characteristics

    The pulse width ( ) (or pulse duration) of the transmitted signal is the time, typically in microseconds, each pulse lasts. If the pulse is not a perfect square wave, the time is typically measured between the 50% power levels of the rising and falling edges of the pulse. The pulse width must be long enough to ensure that the radar emits ...

  8. Tornado vortex signature - Wikipedia

    en.wikipedia.org/wiki/Tornado_vortex_signature

    A tornadic vortex signature, abbreviated TVS, is a Pulse-Doppler radar weather radar detected rotation algorithm that indicates the likely presence of a strong mesocyclone that is in some stage of tornadogenesis. [1] It may give meteorologists the ability to pinpoint and track the location of tornadic rotation within a larger storm, and is one ...

  9. Doppler on Wheels - Wikipedia

    en.wikipedia.org/wiki/Doppler_on_Wheels

    Doppler on Wheels. DOW 7 on display at the USA Science and Engineering Festival in 2010. Doppler on Wheels (or DOW) is a fleet of X-band and C-band mobile and quickly-deployable truck-borne radars which are the core instrumentation of the Flexible Array of Radars and Mesonets [1] affiliated with the University of Illinois [2] and led by Joshua ...

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