Commission 31: Time (Heure)
The mission of IAU Commission 31 is to facilitate the astronomical use of the techniques, data, and equipment produced by workers in the field of time and frequency, and to ensure that a uniform and logical nomenclature is used by workers in all related fields. Since theories of general relativity require that coordinates of space and time be treated logically as components of a four-space metric tensor, the task of Commission 31 integrates closely with those of the Commissions responsible for the definition, creation, and maintenance of astronomical coordinate systems, and specifically Commissions 4 (Ephemerides), 7 (Celestial Mechanics), 8 (Positional Astronomy), and 19 (Rotation of the Earth).
KeywordsVery Long Baseline Interferometry Deep Space Network Universal Time Coordinate Hydrogen Maser Selective Availability
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- International Vocabulary of Basic and General Terms in Metrology (VIM) International Organization for Standardization (ISO), Geneva, Switzerland .Google Scholar