Interferometer
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Interferometer
</dt>
An apparatus used to produce and measure interference
from two or more coherent wave
trains from the same source. See radio
interferometer.
</dd>
Interferometers are used to measure wavelengths, to measure angular
width of sources, to determine the angular position of sources (as in
satellite tracking), and for many other purposes.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use