ARRL -- The national association for Amateur Radio ARRL -- The national association for Amateur Radio
hamcity.com -- Ad
Find on this site...
Site Index 
  
Search site:
  
Call sign search:
 
ARRL Member Login...
Username:   Password:

  
Register    Forgot userid/password? 
Quick Links...
Text-only 
Current Feature Articles

  •  
  • Mar 19 Surfin': Hodgepodge Is Just Another Word for Mishmash
  •  
  • Mar 16 The Radio Amateur’s Hand Book by Archie Frederick Collins
  •  
  • Mar 12 Surfin': Do You Hear What I Hear?
  •  
  • Mar 08 The ARRL Second Homebrew Challenge -- And the Winners Are...
  •  
  • Mar 05 Surfin': Using the Internet as a Public Service Radio Scanner
  •  
  • Mar 04 Amateur Radio Quiz: Workbench Wisdom
  •  
  • Mar 01 ARRL In Action: What Have We Been Up to Lately?
  •  
  • Mar 01 It Seems to Us: Emergency Preparedness and the FCC Rules
  •  
  • Feb 26 Surfin': Hamming Your Way to Fame
  •  
  • Feb 24 ARDF Update: Foxes, Fitness and Fun in 2010

    ARRL Products:
    DXCC, DXing resources and Call Sign listings

    (More)

    The Complete DX'er -- Covers nearly every significant aspect of DXing. 3rd edition.

    The DXCC Yearbook 2007 -- The DXing year-in-review: DXing activities, the Clinton B. DeSoto Cup and DXCC Challenge standings.

    RSGB Prefix Guide -- The complete guide to prefix identification and information. DXCC listings by prefix, award details, and more. 8th edition.

    DXing on the Edge -- The Thrill of 160 Meters

    YASME--The Danny Weil and Colvin Radio Expeditions -- This is the history of three travelers: sailor Danny Weil and famed ham radio DXpeditioners Lloyd and Iris Colvin.

       

    Surfin': Time for the Leaping Second

    By Stan Horzepa, WA1LOU
    Contributing Editor
    December 30, 2005


    This week, we end the year by making it a little longer and visit Web sites that take notice of that extra time.


    Don't know if you noticed, but the Earth is slowing down. It just isn't rotating on its axis as quickly as it has in the past. As a result, the atomic clocks that our timekeepers use to keep time need to be adjusted occasionally to stay in synch with the Earth's rotation. Accordingly, on New Year's Eve, "Coordinated Universal Time (UTC) will be retarded by 1.0s so that the sequence of dates of the UTC markers will be:

    In other words, an extra second, the "leap second," will be inserted just before midnight UTC this New Year's. Which brings us to the LeapSecond Home Page of Tom Van Baak.

    LeapSecond Home Page

    The LeapSecond Home Page is the result of one man's quest witness time retard by one second.

    Ten years ago, Tom wanted to build an LED digital analog clock that would be accurate to better than one second per year, so he would have the fun of adjusting it when a leap second occurred. "This simple goal resulted in a most interesting journey into electronics, horology, astronomy, test equipment, quartz oscillators, rubidium and cesium atomic clocks, hydrogen masers, frequency counters and phase comparators, GPS, Loran C, GOES, and WWV / WWVB radio receivers." Tom's Web site is dedicated to precise time and frequency and it contains an amazing array of information in this realm.

    The folks who populate the precise time and frequency realm affectionately call each other "time-nuts." Since time and frequency are an integral part of ham radio, some time-nuts are also ham radio-nuts. One, in particular, John Ackermann, N8UR, hosts and administers the time-nuts mailing list, where the time-nuts discuss precise time and frequency measurement and related topics. Besides tending to the time-nuts mailing list, John also has an interesting Web site, American Febo Enterprises, with a page dedicated to time and frequency measurement.

    Until next year, keep on surfin'.

    Editor's note: Always short on time, Stan Horzepa, WA1LOU, looks forward to a little extra time on this New Year's Eve. Discuss your favorite time or other cool stuff with Stan by e-mailing him or adding comments to his blog.

       



    Page last modified: 10:34 AM, 23 Dec 2005 ET
    Page author: awextra@arrl.org
    Copyright © 2005, American Radio Relay League, Inc. All Rights Reserved.