The Doppler effect was named after Christian Johann Doppler. This Austrian physicist observed and explained the changes in pitch and frequency of sound and light waves, as well as all other types of waves, caused by the motion of moving bodies. The...

The Doppler shift (or Doppler effect) is named after the Austrian scientist Christian Doppler, who in 1842 noticed that the observed frequency of waves from a source depends on how it is moving relative to the observer. In its simplest form, applicable...

Doppler ultrasonography is a noninvasive, non-x ray, painless diagnostic procedure that can detect the direction, velocity, and turbulence of blood flow. It is frequently used to detect problems with heart valves or to measure blood flow through the...

A real or an apparent change in the frequency of a wave (e.g. of sound or light) manifest when the wave source and an observer move relative to one another. Convergence of source and observer produces an increase in frequency, and divergence creates a...

The Doppler effect, named after Christian Doppler, is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves. For waves that propagate in a wave medium, such as sound waves, the velocity...

(ProQuest Information and Learning: Formula Omitted) ABSTRACT Beam broadening effect on Doppler spectrum for an obliquely pointed meso-, strato-, troposphere (MST) radar beam is investigated theoretically in this article. The general behavior of radial velocity on the cross section of an oblique...

Skip Ely apologizes less often for missed forecasts these days, and he gives a lot of the credit to his office's new 88D weather radar. "It's like moving up from a propeller plane to a Lear jet," says Ely, meteorologist in charge...