DailyDirt: Calibration Time, Come On!

from the urls-we-dig-up dept

Not all clocks are created equal. Some clocks lose a few seconds every month. Others are connected to cell phone towers and are constantly updating their time displays. We've come a long way from the VCRs that blink 12:00. Here are just a few articles on how we're keeping track of every minute. By the way, StumbleUpon can recommend some good Techdirt articles, too.
Hide this

Thank you for reading this Techdirt post. With so many things competing for everyone’s attention these days, we really appreciate you giving us your time. We work hard every day to put quality content out there for our community.

Techdirt is one of the few remaining truly independent media outlets. We do not have a giant corporation behind us, and we rely heavily on our community to support us, in an age when advertisers are increasingly uninterested in sponsoring small, independent sites — especially a site like ours that is unwilling to pull punches in its reporting and analysis.

While other websites have resorted to paywalls, registration requirements, and increasingly annoying/intrusive advertising, we have always kept Techdirt open and available to anyone. But in order to continue doing so, we need your support. We offer a variety of ways for our readers to support us, from direct donations to special subscriptions and cool merchandise — and every little bit helps. Thank you.

–The Techdirt Team

Filed Under: clocks, leap seconds, nuclear clock, stardate, time
Companies: nist


Reader Comments

Subscribe: RSS

View by: Time | Thread


  • identicon
    mischab1, 15 Dec 2011 @ 5:24pm

    You can't read the full American Scientist article without paying. :(

    The content you've requested is available without charge only to active Sigma Xi members and affiliates

    link to this | view in chronology ]

  • identicon
    Lawrence D'Oliveiro, 15 Dec 2011 @ 6:00pm

    Stardates

    I’ve proposed a definition of stardates as a number of days (accurate to tenths of a day) from 00:00:00 1st January 1970 UTC. You can compute it with this command:

    bc <<<"scale = 1; ($(date +%s)) / 86400"

    link to this | view in chronology ]

  • identicon
    abc gum, 15 Dec 2011 @ 7:56pm

    "there could be a redefined version of Coordinated Universal Time that eliminates any requirement to keep our time systems synchronized to the Earth's rotation"

    This sort of thinking is rather short sighted and will probably make the pencil neck MBAs happy, it has definitely caused a stir in the scientific fields. For some, the immediate problem will be tracking divergent time systems, others will not have a problem at all for many years. Eventually, Christmas in the northern hemisphere will no longer occur in winter. Not sure how Santa feels about that. There are several suggestions about how this should be addressed - not sure if any make more sense than simply staying with the system presently in place.

    link to this | view in chronology ]

    • identicon
      Anonymous Coward, 15 Dec 2011 @ 8:58pm

      Re:

      Yeah, that is always the problem: "we can have a system without all the artifacts and tweaks needed to calibrate it to the observed day" sounds great and good and swell - right up until you are telling people that noon is now at sunset and the winter solstice is in May. I understand that sciency types would really like a simple time system - I would like a simple time system - but ultimately, timekeeping is about day-to-day concerns, and no one cares that this is Second 1490384512897124956503250325681025863405 since the Adoption of Regular Time and leap seconds/minutes/hours/days are a thing of hte past, if it means they have to go to bed in the middle of the afternoon because that is 0:00 UTC now and work starts in 8 hours in the pitch dark.

      link to this | view in chronology ]

  • icon
    Violated (profile), 15 Dec 2011 @ 9:58pm

    I presume their new clock is the caesium fountain clock. Each tick is the time it takes to go up and then down.

    Nice but the best time keepers in our Universe are the pulsar stars that make great time keepers through their regular rapid rotations.

    link to this | view in chronology ]

    • identicon
      Lawrence D'Oliveiro, 16 Dec 2011 @ 1:09am

      Re: ... the best time keepers in our Universe are the pulsar stars that make great time keepers through their regular rapid rotations.

      No they’re not. They are all perceptibly slowing down.

      Guess how we measure that?

      link to this | view in chronology ]

  • icon
    BentFranklin (profile), 16 Dec 2011 @ 7:51am

    The March 2011 earthquake in Japan caused earth's sidereal day to decrease by some milliseconds. Should the time standards be adjusted after every earthquake? How about when the ice caps melt and rotation slows down by a lot?

    It's complicated, but I still like noon being the exact time when the sun is highest in the sky.

    link to this | view in chronology ]

    • icon
      Michael Ho (profile), 16 Dec 2011 @ 1:23pm

      Re:

      I think we ought to try to accelerate the Earth's rotation in order for it to match atomic clocks... :P

      link to this | view in chronology ]

  • identicon
    Anonymous Coward, 18 Dec 2011 @ 1:40am

    Leap Seconds

    Proposals to somehow define leap seconds out of existence are misguided. The earth's rotation is slowing down. That is a physical fact that we humans are powerless to change. So the solar second is gradually getting longer. The UTC second was based on the mean solar second of a past year and is constant. It needs to be constant to avoid yearly revisions of a whole bunch of physical constants. Navigators and astronomers like to use UTC and want it kept close to solar time, not drifting off. Thus leap seconds are inevitable. Weenies who are not coping with leap seconds need to toughen up and cope. Get the software fixed and stop moaning.

    link to this | view in chronology ]


Follow Techdirt
Essential Reading
Techdirt Deals
Report this ad  |  Hide Techdirt ads
Techdirt Insider Discord

The latest chatter on the Techdirt Insider Discord channel...

Loading...
Recent Stories

This site, like most other sites on the web, uses cookies. For more information, see our privacy policy. Got it
Close

Email This

This feature is only available to registered users. Register or sign in to use it.