convergency

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convergency

convergency
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convergency
i. The angle that one meridian on the earth's surface makes with another. It equals the angular difference between the measurements of the great circle at each meridian.
ii. The angle between two meridians at a given latitude. At the poles, its value is the change of longitude, but it slowly reduces toward the equator when the value is zero, as meridians are parallel to one another. Earth's convergence = Change of longitude (ch long) × Sine latitude.
iii. The difference between the great-circle bearings of two meridians. The angle (b − a) in the figure in (i) is the earth's convergence = ch long × sine lat.
iv. Also called earth's convergence.
References in periodicals archive ?
Attachments, drives and development: Conflicts and convergencies in theory.
convergences of Jupiter and Mars/Jupiter and Venus/Jupiter and Saturn, a double set of planetary convergencies causing intensification of the Northern Lights, and a star known as DO Aquilae reported by Chinese observers as new and shining for 70 days in 5BC, one of several candidates for the Nativity year, whose chronology is askew thanks to the erroneous BC/AD calendar invented by the Byzantine monk Dionysius Exiguus--he was understandably thrown by the transition from BC1-AD1, especially as there was no Zero in classical mathematics.
BURKE: I suppose we should seek convergencies where we can find them.