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Time

Time. What Time is It?. “normal time”. Local time is the date/time reported by your PC. UTC , Coordinated Universal Time, popularly known as GMT (Greenwich Mean Time), or Zulu time. Local time differs from UTC by the number of hours of your timezone . Chicago is ___ hours from GMT.

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Time

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  1. Time

  2. What Time is It?

  3. “normal time” • Local time is the date/time reported by your PC. • UTC, Coordinated Universal Time, popularly known as GMT (Greenwich Mean Time), or Zulu time. Local time differs from UTC by the number of hours of your timezone. • Chicago is ___ hours from GMT

  4. GPS Time • GPS, Global Positioning System time, is the atomic time scale implemented by the atomic clocks in the GPS ground control stations and the GPS satellites themselves. • GPS time was zero at 0h 6-Jan-1980 and since it is not perturbed by leap seconds GPS is now ahead of UTC by 16 seconds

  5. More times • Loran-C, Long Range Navigation time, is a time scale implemented by the atomic clocks in Loran-C chain transmitter sites. Loran time was zero at 0h 1-Jan-1958 and since it is not perturbed by leap seconds it is now ahead of UTC by 25 seconds. • TAI, Temps Atomique International, is the international atomic time scale based on a continuous counting of the SI second. TAI is currently ahead of UTC by 35 seconds. TAI is always ahead of GPS by 19 seconds.

  6. Cell phone Time? http://www.leapsecond.com/java/gpsclock.htm Last night Janet’s phone was 5 hours and 29 seconds faster than UTC. Or a few seconds faster than GPS

  7. Time http://www.leapsecond.com/java/gpsclock.htm

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