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TT differs from Geocentric Coordinate Time (TCG) by a constant rate. Formally it is defined by the equation = +, where TT and TCG are linear counts of SI seconds in Terrestrial Time and Geocentric Coordinate Time respectively, is the constant difference in the rates of the two time scales, and is a constant to resolve the epochs (see below).
TT-UT1 2000+ ΔT vs. time from 1657 to 2022 [1] [2] In precise timekeeping, ΔT (Delta T, delta-T, deltaT, or DT) is a measure of the cumulative effect of the departure of the Earth's rotation period from the fixed-length day of International Atomic Time (86,400 seconds).
"United Nations Code for Trade and Transport Locations". UN/LOCODE 2011-2. UNECE. 28 February 2012. - includes IATA codes "ICAO Location Indicators by State" (PDF). International Civil Aviation Organization. 17 September 2010.
Barycentric Dynamical Time (TDB, from the French Temps Dynamique Barycentrique) is a relativistic coordinate time scale, intended for astronomical use as a time standard to take account of time dilation [1] when calculating orbits and astronomical ephemerides of planets, asteroids, comets and interplanetary spacecraft in the Solar System.
The Tây Sơn brothers considered themselves champions of the people and received widespread popular support from the peasantry, from indigenous highland tribes, ethnic Chinese sea traders and troops of the Ly Tai and Dinh families. Leader Nguyễn Huệ announced that the idea was to end feudal oppression, remove corrupt officials and ...
Seven years after Elon Musk first challenged innovators to develop a functioning hyperloop system, Richard Branson-backed Virgin Hyperloop and Hyperloop TT are in a race to bring the high-speed ...
See today's average mortgage rates for a 30-year fixed mortgage, 15-year fixed, jumbo loans, refinance rates and more — including up-to-date rate news.
Gisele Pelicot and one of her lawyers on December 16, 2024 in Avignon, France Credit - Clement Mahoudeau—AFP/Getty Images. G isele Pelicot, the 72-year-old woman at the center of the horrifying ...