[DX] Vuotta 2005 venytetään

["Jari Savolainen" <jari.savolainen@xxxxxxxxxxx>]

Sekunti lisää vuotta 2005.
Vaikka joskus esim. keskiaalloilla kuunnellessani
taajuutta, jolla on asemia useista eri maista, tuntuu
tasatunnilla siltä että joka maassa tunti vaihtuu aivan
eri sekunneilla. Ainakin asemien aikapiippauksista päätellen.
Tähän tietenkin vaikuttaa viiveet ohjelman syöttösysteemeissä.
JSA
Oheinen lainaus

http://medianetwork.blogspot.com/

The world's clocks are due to be reset on December 31st - by one whole
second. That's because our planet Earth has not quite kept up the rotational
pace it maintained in prior centuries. On the advice of astronomers, who use
observations of stars to keep tabs on Earth's spin, the International
Telecommunication Union has decided that the final minute of 2005 before the
stroke of midnight at Greenwich, England, shall contain 61, rather than 60,
seconds.

"People in North America who have shortwave radios and nothing better to do
on New Year's Eve can actually hear this 'leap second' correction being
made," says Roger Sinnott, a senior editor at Sky & Telescope magazine. Tune
in shortwave station WWV at 5 or 10 MHz, or CHU at 3.335 MHz, and count the
61 official seconds that will tick off the minute starting at 6:59 p.m.
Eastern Standard Time (3:59 p.m. PST), which is the minute before midnight
at Greenwich.

If everything goes right, personal computers, GPS receivers, and
radio-controlled clocks around the world will automatically adjust
themselves. But there is some question about this, because the last time a
leap second was added was on December 31, 1998, before most of today's
computers were manufactured.

This is the 23rd leap second to be inserted since 1972, and some
communications engineers have embarked on a campaign to abolish them as a
needless annoyance. That has many astronomers up in arms, for it would
signal the end of our fundamentally Sun- and star-based timekeeping system.

For more about the leap-second controversy, see Save the Leap Second by
Belgian astronomer and engineer Christian Steyaert from the December 2005
issue of Sky & Telescope magazine.

___________________________________________________________________________________
Ennakkotilaa WRTH 2006 nyt:
http://www.amazon.com/exec/obidos/ASIN/0823059367/hardcoredxcom/
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