Coherence

Coherence

The amount of correlation between the intensity and/or phase of electromagnetic fields at points separate in space and time.

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Part of Speech: noun
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Industry/Domain: Earth science
Category: Mapping science
Company: American Congress on Surveying & Mapping
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Related terms

coherence

Language; Translation & localization; Translation

A standard which all well-formed texts must meet and which stipulates that the grammatical and/or lexical relationships ‘hang together’ and make overall sense as text.

cohere

Education; SAT vocabulary

To stick together.

coherence

Military; Missile defense

The matching, in space (transverse coherence) or time (temporal coherence), of the wave structure of different parallel rays of a single frequency of electromagnetic radiation. ...

coherence

Engineering; Electronic engineering

In electromagnetic radiation, a condition in which all the wavefronts are in phase. This results in high energy concentration, and makes possible the long-distance transmission of ...

coherent

Telecommunications; General telecom

Pertaining to a fixed phase relationship between corresponding points on an electromagnetic wave. Note: A truly coherent wave would be perfectly coherent at all points in space. ...

subtropical

Earth science; Mapping science

Relating to the warmest region of the Temperate Zones that border on the Torrid Zone.

sky

Earth science; Mapping science

The region above and beyond the Earth, as it is seen looking up from the ground. Sky looks blue during the day and dark at night.

South Pole

Earth science; Mapping science

The most southern point of the Earth. The South Pole is the southern end of the axis on which the Earth rotates.

prime meridian

Earth science; Mapping science

The line of longitude that passes through the town of Greenwich, England, and that measures 0 degree. It is the line from which other longitude lines are measured.

planet

Earth science; Mapping science

A celestial body revolving around a sun in a nearly circular orbit. This definition excludes comets, which have highly elliptical orbits. However, it may also exclude some of ...

area of error

Earth science; Mapping science

A figure within which the true location of a point whose location has been determined by measurement is believed to lie, with stated degree of probability.

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