NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Chile and deltaT
From: Peter Hakel
Date: 2010 Mar 3, 17:13 -0800
From: Frank Reed <FrankReed@HistoricalAtlas.com>
To: NavList@fer3.com
Sent: Wed, March 3, 2010 2:52:50 PM
Subject: [NavList] Re: Chile and deltaT
[parts deleted by PH]
From: Peter Hakel
Date: 2010 Mar 3, 17:13 -0800
Frank is correct, the original error was in the news article. My mistake was not checking with more of a primary source like the NASA website, which did have the correct units. With the effect artificially magnified by three orders of magnitude I thought we had something that would be relevant for deltaT considerations and hence of interest for NavList. Then Richard Langley made the correction, which made my original posting, well, pretty much pointless... perhaps with the exception of bringing up that minuscule annual variation in LOD.
Peter Hakel
Peter Hakel
From: Frank Reed <FrankReed@HistoricalAtlas.com>
To: NavList@fer3.com
Sent: Wed, March 3, 2010 2:52:50 PM
Subject: [NavList] Re: Chile and deltaT
[parts deleted by PH]
You noted:
"The only serious error was Peter's, in confusing the predicted change in day-length, correctly stated in microseconds, to refer to milliseconds. "
I believe that was in the original article by space.com, picked up by various other media without change, which was corrected on their web site later in the day. Not that it matters, of course. I just wanted to mention that it probably wasn't Peter's error.
