Definitions for terrestrial time
ter·res·tri·al time

Princeton's WordNetRate this definition:0.0 / 0 votes

1. terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris timenoun

   (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions

WikipediaRate this definition:0.0 / 0 votes

1. Terrestrial Time

   Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of Earth. For example, the Astronomical Almanac uses TT for its tables of positions (ephemerides) of the Sun, Moon and planets as seen from Earth. In this role, TT continues Terrestrial Dynamical Time (TDT or TD), which succeeded ephemeris time (ET). TT shares the original purpose for which ET was designed, to be free of the irregularities in the rotation of Earth. The unit of TT is the SI second, the definition of which is based currently on the caesium atomic clock, but TT is not itself defined by atomic clocks. It is a theoretical ideal, and real clocks can only approximate it. TT is distinct from the time scale often used as a basis for civil purposes, Coordinated Universal Time (UTC). TT is indirectly the basis of UTC, via International Atomic Time (TAI). Because of the historical difference between TAI and ET when TT was introduced, TT is approximately 32.184 s ahead of TAI.

ChatGPTRate this definition:0.0 / 0 votes

1. terrestrial time

   Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of the Earth. It is a theoretical time scale based on the rotation of the Earth as if it were perfectly uniform, ignoring various micro fluctuations such as Earth tides and weather. It is effectively the successor to Ephemeris Time.

WikidataRate this definition:0.0 / 0 votes

1. Terrestrial Time

   Terrestrial Time is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of the Earth. For example, the Astronomical Almanac uses TT for its tables of positions of the Sun, Moon and planets as seen from the Earth. In this role, TT continues Terrestrial Dynamical Time, which in turn succeeded ephemeris time. TT shares the original purpose for which ET was designed, to be free of the irregularities of mean solar time. The unit of TT is the SI second, the definition of which is currently based on the caesium atomic clock, but TT is not itself defined by atomic clocks. It is a theoretical ideal, which real clocks can only approximate. TT is distinct from the time scale often used as a basis for civil purposes, Coordinated Universal Time. TT indirectly underlies UTC, via International Atomic Time.

Matched Categories

1. • Astronomy
   • Time Unit

How to pronounce terrestrial time?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say terrestrial time in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of terrestrial time in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of terrestrial time in Pythagorean Numerology is: 3

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=terrestrial time
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Terrestrial_Time
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=terrestrial time