©2002-2007 dailyTangents.com
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Time and Time Zones
©2002-2007 dailyTangents.com |
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DEFINITIONs
* Systems of time
... from tycho
- atomic, universal, coordinated universal,
dynamical, terrestrial, barycentric dynamical,
geocentric coordinate, barycentric coordinate,
sidereal, delta, julian
* Time Zone Abbreviations ... by S. Thorsen
- standard, european, US & Canada, Australia, Zone Letters (Y-N,Z,A-M,J)
...
Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India,
Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Rome, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu
* Glossary of Time &
Frequency Terms ... from NIST
- Accuracy, Aging, Allan Variance or Allan Deviation, Ambiguity,
Atomic Time Scale (TA), Calibration, Clock, Coordinated Universal Time (UTC),
Date, Disciplined Oscillator (DO), Drift (frequency), DUT1,
Ephemeris Time (ET), Epoch, Frequency, Frequency drift, Frequency offset,
Frequency shift, Frequency stability, Frequency standard, Global Positioning System (GPS),
Greenwich Mean Time (GMT), International Atomic Time (TAI), Julian Day,
Leap second, Nominal value, On Time Marker (OTM), Phase, Precision,
Reproducibility, Resolution, Second, Sidereal time, Synchronization,
Syntonization, Stratum clocks, Terrestrial Time (TT), Time code,
Time interval, Time scale, Time standard, Time step, Uncertainty,
Universal Time (UT) Family
LINKS
* READING: A Brief History of Clocks: From
Thales to Ptolemy
... by J. Weissman
* READING: The Time of Internet ... by F. Pollastri
- Time services, accuracy, update, format, NTP, synchronization, legislation,
authorities, organizations, sites, measurment, equations, zones, universal,
international, navigation, telephone, broadcast, glossary
* READING:
International Date Line,
Astronomical Applications
& History of US Daylight Time
... from USNO
- Data services, sunrise, sunset, moonrise, moonset, twilight, illumination, eclipses,
solar positions, systems, stars, dates ... USA 2002: daylight time begins April 7 and ends October 27
* READING: Educational
exhibits - ... from time.gov
- time, clocks, daylight saving, calendars, accuracy and watches
* READING: On the Units of Time
... by E. Hahn
Part I: From Seconds to Days [9 figures: earth's rotation, sidereal time watch,
Johannes Kepler, elliptical orbit, speed of movement, axial tilt, equation of time,
Audemars Piguet Equation du Temps & Patek Phillipe Star Calibre 2000,
Papyrus Version of the Egyptian Book of the Underworld (Duat)]
Part II: The Months & Weeks [12 figures: lunar orbit, moonphase watch,
Astrolabium Galileo Galilei by Ulysse Nardin, solar & lunar eclipse,
orbital arrangement, plane intersection, Ulysse Nardin Tellurium Johannes Kepler,
Romulus and Remus, Julius Caesar, Ulysse Nardin GMT Perpetual Calendar,
Ulysse Nardin Planetarium Nicolaus Copernicus, Roman Method of Dates]
Part III: The Year [6 figures: seasons, axis rotation, sky circle, Constantine I,
Pope Gregory XIII (born Ugo Buoncompagni), Sir John Herschel]
* TECHNICAL: Time & Frequency Division 847
... NIST standards
* TECHNICAL: Network Time Protocol Public Services Project
... maintained by S. Kostecke
* LIST: Yahoo! Science - Time
- millennium, schemes, calendars, circadian rhythms, dendrochronology,
geologic, horology, leaps, countdowns, sunrise, sunset, travel, zones
* MISC: - Geography of Time ... L. Krievs
- links to city, country, time zone maps, and local times around the world.
* MISC: - Time and Date ... S. Thorsen
- current local times around the world sorted by
city,
country, or
time zone.
Site also includes links to clocks, planners, date, world search, calendar generator, counters, countdowns, etc.
* REFERENCE: International Standard
Date and Time Notation
... by M. Kuhn
- International Standard ISO 8601, ISO 8601:2000, Date (YYYY-MM-DD),
Time of Day (hh:mm:ss),
Time Zone
* REFERENCE: ISO 8601
Date/Time Representations ... by G. Houston
- introduction, calendar/ordinal date formats, week/day, local time,
fractional local time of day, UTC, combined date/time formats, periods
of time with or without specific starts or ends.
* REFERENCE: 15 USC Sec 260 -
United States Code, Title 15 - Commerce and Trade,
Chapter 6 - Weights and Measures and Standard Time,
Subchapter IX - Standard Time ... TYCHO
- Congressional declaration of policy; adoption and observance of uniform standard of time;
authority of Secretary of Transportation, Advancement of time or changeover dates,
Zones for standard time; interstate or foreign commerce,
Duty to observe standard time of zones,
Designation of zone standard times,
Part of Idaho in third zone,
Transfer of certain territory to standard central-time zone,
"State" defined
* FACTs & TRIVIA: GMT, UT, and the RGO
... by R.B. Langley
- GMT, Greenwich Mean Time, UT, Universal Time, Royal Greenwich Observatory, RGO,
Thames River, London Docks, Herstmonceux Castle, Sussex, National Maritime Museum,
Observatory Hill, London ... mean sun, meridian, zero degrees longitude, orbit,
eccentric, plane, inclined, equator, sundial, wrong, 16 minutes, noon, 00:00 GMT,
Greenwich Mean Astronomical Time ... mean time 15 degree meridian ...
1928, International Astronomical Union, Greenwich Civil Time, Universal Time,
Universal Day ... astronomical observations, UT0, UT-zero, earth, rotation pole, crust,
UT1, angular orientation, not uniform, variation, seasonal oscillations,
angular momentum, atmosphere, earth, tides, UT2, formula, approximate, oscillations,
rotation, secular effects, tidal friction, winds, exchange, core, shell ...
Atomic Time, frequency, radio emission, cesium atoms, change, energy states,
atomic second, 86,400 per nominal reference day, around 1900, actual day varies,
UTC, Coordinated Universal Time, leap seconds, New Year's Eve, adjustments,
0.9 seconds of UT1, tidal friction, International Earth Rotation Service (IERS),
Paris, France, global network, satellite, lunar, laser, interferometry, Navstar Global
Positioning System (GPS), Bureau International des Poids et Mesures, Sèvres, France,
leap second ... Universal Time, spin, GMT, UT1, UT, BBC, United Kingdom, GPS
... coordinated universal time, 1960, offsets, frequencies, epochs, phases, radio, atomic,
UT2, BIH, Temps Universel Coordinné, 1964, multiple 100 milliseconds monthly,
1972, Atomic Time, leap seconds, UTC, 0.9 seconds, UT1 ... World Time, UTC,
Internet Time, Central European Time ...
BBC, signals, 1924, chimes, Big Ben, broadcast, midnight, 1 January, 5 February,
Astronomer Royal, Frank Dyson, six pips time signal ... six pips, 1949, Abinger,
war, Herstmonceux, 1957 ... Herstmonceux closed February 1990, BBC, Greenwich Time Service,
pips, UTC, GPS, London ... RGO, Herstmonceux Castle, Cambridge University Institute
of Astronomy, U.K. Particle Physics, Astronomy Research Council, Royal
Observatory Edinburgh, Her Majesty's Nautical Almanac Office,
Rutherford Appleton Laboratory, Chilton, Oxfordshire, Queens University in Kingston,
Ontario, Canada, International Study Centre ... books and references
ABBREVIATIONS
* IERS
...
International
Earth
Rotation
and Reference
Systems
Service
... Rapid Service/Prediction Center
* INMS
...
Institute for
National
Measurment
Standards
... (Canada)
* JPL
...
Jet
Propulsion
Laboratory
* NIST
...
National
Institute of
Standards &
Technology
* NPL
...
National
Physical
Laboratory
* NTP
...
Network
Time
Protocol
* ROG
...
Royal
Observatory of
Greenwich
* USNO
...
United
States
Naval
Observatory
... Time Service Department
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