| 单词 | transit instrument |
| 释义 | > as lemmastransit instrument transit instrument n. Astronomy a telescope mounted so that it rotates vertically about a fixed horizontal axis, used for measuring the altitudes of stars and timing their transit across the meridian; = transit telescope n. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > transit instrument > [noun] transit instrument1744 transitory1744 transit circle1793 meridian circle1809 1744 Philos. Trans. (Royal Soc.) 43 92 The right Ascension of the Comet by the Transit Instrument at Sherborn was found to be 5° 48' 1″. 1910 L. S. Smith Theory & Pract. Surv. (ed. 17) xiv. 594 Such an instrument is designed especially for astronomical observations for latitude and zenith, but may also be used as a meridian or transit instrument. 2013 D. L. Rabinowitz in W. F. van Altena Astrometry for Astrophysics xv. 235 Charge-coupled device cameras were first used in drift-scan mode on ground-based telescopes beginning in the 1980s with the CCD Transit Instrument. < as lemmas |
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