Rujukan Waktu_Bumi

  1. The 1991 definition refers to the scale agreeing with the SI second "on the geoid", i.e. close to mean sea level on the Earth's surface, see IAU 1991 XXIst General Assembly (Buenos Aires) Resolutions, Resolution A.4 (Recommendation IV). A redefinition by resolution of the IAU 2000 24th General Assembly (Manchester), at Resolution B1.9, is in different terms intended for continuity and to come very close to the same standard.
  2. TT is equivalent to TDT, see IAU conference 1991, Resolution A4, recommendation IV, note 4.
  3. IAU conference 1991, Resolution A4, recommendation IV, part 2 states that the unit for TT is to agree with the SI second 'on the geoid'.
Ukuran dan piawaian waktu
Subjek utama
Piawaian antarabangsa
Piawaian lampau
Masa dalam fizik
Horologi
Takwim
Kaji purba dan kaji bumi
Kronologi astronomi
Unit masa
Topik berkaitan