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Glite Dictionary
UT1

UT1

9.5
A precise time based on the Earth's rotation measured at Greenwich used for astronomy and navigation
  • noun
  • Specialized
translation icon : UT1
  • Why is UT1 important for navigation?

Examples

  • Astronomers rely on UT1 for accurate measurements of time based on Earth's rotation.

  • Astronomers often use UT1 as a reference for precise celestial measurements.

  • International clocks are sometimes synchronized with UT1 for scientific experiments.

  • The difference between UT1 and UTC is carefully monitored due to variations in Earth's rotation.

  • The UT1 standard is crucial.

  • In navigation, UT1 provides the necessary timing reference for celestial positioning.

  • The difference between UTC and UT1 can affect satellite positioning calculations.

Synonyms

GMT
vsUT1
  • Archaic
12 4.7

A time at zero longitude in Greenwich, England used as the world time reference

is a more precise form now used for astronomy and navigation
Greenwich Mean Time
vsUT1
1 3.7

People use the time at Greenwich in England as the world time standard

is a more precise form used specifically in astronomy and navigation
Universal Time
vsUT1
  • Specialized
1 4.8

Time at Greenwich, England that countries use as the world time standard

is a more precise form based on Earth's rotation for astronomy and navigation
Greenwich Time
vsUT1
1 3.4

Time at Greenwich, England that is used worldwide as the standard

is a precise form based on Earth's rotation for astronomy and navigation
UT
vsUT1
  • Specialized
5.1

Time at Greenwich, England used as the world standard

is a more precise form used in astronomy and navigation

Surface Forms

UT1 singular

Etymology

UT1 stands for Universal Time, and the '1' shows it is a precise version. It is 'based on the Earth's rotation' and measured at Greenwich, the place used as the 'zero' line of longitude, so UT1 is the time used in astronomy and navigation when very exact time is needed.