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单词 vertical earth rate
释义 vertical earth rate
[`vǝrd·ǝ·kǝl `ǝrth ´rāt]
NAVIGATION
To compensate for the effect of earth rate, the rate at which a gyroscope must be turned about its vertical axis to permit the spin axis to remain in the meridian; it is maximum at the poles, zero at the equator, and varies as the sine of the latitude.
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