Doppler effect"(Also called Doppler shift.) "The change in the apparent time interval between two events which arises from the motion of an observer together with the finite velocity of information about the events" (Gill 1965).
Doppler effect A shift in the frequency of an electromagnetic or sound wave due to the relative movement of the source or the observer.
Doppler Effect (aka Doppler Shift) The apparent change in frequency of sound or light waves, varying with the relative velocity of the source and the observer. If the source and observer draw closer together, the frequency is increased.
Doppler Effect: To detect if and object is moving towards or away from you.
Doppler Effect: First name after the Austrian Physiciest "Johann Christian Doppler" in 1842.
"Doppler" radar is a special type of radar that makes use of the Doppler Effect to measure not only the distance of a target, but its velocity as well.
Doppler Radar The Doppler radar is a type of weather survelliance radar which takes advantage of the Doppler effect.
A radar unit that, in the velocity mode, determines the radial movement of airborne hydrometeor or aerosol targets either to or from the unit; based upon the Doppler Effect or Shift, ...
Doppler Shift (or Doppler Effect) - the change in frequency with which energy from a given source reaches an observer when the source and the observer are in motion relative to each other ...
Using the Doppler effect, it measures the velocity of particles. Named for J.
DOPPLER RADAR: A type of weather radar which displays atmospheric motion. It utilizes the Doppler Effect to measure the velocity of particles in the atmosphere.
DOPPLER RADAR: A type of weather radar that determines whether atmospheric motion is toward or away from the radar. It uses the Doppler effect to measure the velocity of particles suspended in the atmosphere.
Experiments with the Doppler effect begin.
1970 - NOAA National Oceanic and Atmospheric Administration established. Weather Bureau is renamed the National Weather Service.
1971 - Ted Fujita introduces the Fujita scale for rating tornadoes.
 See also: Meteor, Radar, Weather, Temperature, Meteorology
  
|
RSS
