Coherence

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Coherence


In radar, a relation between two wave trains such that, when they are brought into coincidence, they are capable of producing interpretable interference phenomena.
This is limited to those wave trains which have fixed or slowly varying phase relationships with each other.
In contract are the rapid interference phenomena produced by the superposition of the more or less randomly scattered waves from hydrometeors.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use