> it will be necessary to modify all [...] Why?
> It will also be necessary to. modify > all computer programs which keep civil time [...] Examples of such programs with a material manifestation of a problem? -paul Sent from my BlackBerry® by Boost Mobile -----Original Message----- From: ashtongj <ashto...@comcast.net> Sender: leapsecs-boun...@leapsecond.com Date: Sun, 24 Oct 2010 12:08:03 To: <leapsecs@leapsecond.com> Reply-To: ash...@ieee.org, Leap Second Discussion List <leapsecs@leapsecond.com> Subject: [LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds Here is a cost that has not yet been mentioned. Many sources still refer to the basis of civil time (before adjustment for time zone and daylight saving) as Greenwich Mean Time. This can still be justified because although the meridian for which UTC is the mean solar time moves over the surface of the earth, and does not consistently pass through the crosshairs of the Airy transit, it most likely remains on the Royal Observatory, Greenwich. (I estimate 0.9 s of time corresponds to about 260 m at that latitude.) Even if the meridian does not stay on the grounds, it at least stays within the London Borough of Greenwich. But once leap seconds are abandoned and |UT1 - UTC| becomes large enough to move the meridian entirely outside Greenwich, it will be necessary to modify all textbooks, monuments, and museum exhibits containing explanations of civil time accordingly. It will also be necessary to modify all computer programs which keep civil time to replace GMT with the appropriate symbol (I have supposed the symbol UTC will continue, but who knows). Some may think that the preceding paragraph is light-hearted, and maybe it is. I do think, however, that the time keeping authorities in English-speaking countries have proven incapable of getting the public to stop using the symbol GMT. Indeed, NIST and USNO have so little influence on the rest of the government that they can't even get the US government to stop using the symbol GMT. The inability to enforce whatever decision is finally agreed to is a concern. Gerry Ashton _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs