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Publicado el: 2012-03-06
Tiempo de estudio aproximado: .75 - 1.00 h
Incluye sonido: yes
Geospatial
Founded in 1830, the United States Naval Observatory (USNO) is among the oldest scientific agencies in the United States. Initially tasked with restoring, repairing, and rating nautical instruments, the USNO today provides precise time and celestial measurements required for GPS, telecommunications, navigation, and other operations. Intended as an introduction to the USNO, this module examines how the Observatory goes about its mission, and briefly describes the science behind its observations and publications.
Outcome Objectives
Naval Observatory, USNO, astrometry, celestial reference frame, terrestrial reference frame, Earth Orientation Parameters, EOP, Very Long Baseline Interferometry, VLBI, proper motion, parallax, double star, star catalog, Astronomical Almanac, Nautical Almanac, Air Almanac, precise time, time scale, Coordinated Universal Time, UTC, UT1, Greenwich Mean Time, GMT, International Atomic Time, TAI, atomic clock