A dopplergraph or dopplergram is a two-dimensional representation of the approaching and receding motions of an object or area.
The word "dopplergraph" is a combination of the words
doppler and
photograph. Dopplergraphs are two-dimensional records of variations in the
doppler shift in light intensity.
Dopplergraphs do not need to be a record of the shift of visible light, but of any radiated wave, which includes
electromagnetic waves and acoustic waves.
Because the doppler shift is caused by the velocity of the radiating source towards or away from the viewer, a dopplergraph is a picture of the velocities associated with the sources being viewed.
See also
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Spectrogram
A spectrogram is a visual representation of the spectrum of frequencies of a signal as it varies with time.
When applied to an audio signal, spectrograms are sometimes called sonographs, voiceprints, or voicegrams. When the data are represen ...
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Spectroheliograph
The spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single wavelength of light, a monochromatic image. The wavelength is usually chosen to coincide with a spectral wavelength of one of the c ...
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Spectrohelioscope
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Solar Dynamics Observatory
The Solar Dynamics Observatory (SDO) is a NASA mission which has been observing the Sun since 2010. Launched on 11 February 2010, the observatory is part of the Living With a Star (LWS) program.
The goal of the LWS program is to develop the ...
References
Doppler effects
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