local mean time

American  

[loh-kuhl meen tahym] / ˈloʊ kəl ˈmin ˌtaɪm /

noun

1. Astronomy. time reckoned by the position of the mean sun in respect to a specific longitude, with the length of each day being, without fluctuation, 24 hours; a standard of time used especially in astronomy and navigation. Abbreviation: LMT.

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local mean time Scientific  

1. Solar time as measured by the position of the mean sun with respect to an observer's local meridian. Like apparent time, local mean time differs continuously with the observer's longitude and is not standardized over a time zone. However, a day as measured by local mean time does not vary in length throughout the year—it is always 24 hours.

2. Compare apparent time See more at mean time solar time

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Example Sentences

If mean solar time were strictly observed, people traveling east or west would have to reset their watches continually as the longitude changed, just to read the local mean time correctly.

From Textbooks • Oct. 13, 2016

For a position on the central line near Stafford, Hind found that the totality began at 2h. 36m. p.m. local mean time, the duration being 3m. 26s., and the Sun’s altitude being more than 30°.

From The Story of Eclipses by Chambers, George F. (George Frederick)

You will then have secured the name of the star desired and the exact local mean time of the star's meridian passage.

From Lectures in Navigation by Draper, Ernest Gallaudet

At 10 p.m., local mean time, January 25, 2008, the tracer hiccupped and, all by itself, went to sleep!

From Zero Data by Saphro, Charles

The result will be the local mean time of the star's meridian passage.

From Lectures in Navigation by Draper, Ernest Gallaudet