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On 6/30/2012 4:52 PM, Gary LaPook wrote:
> If, as is the normal case, you are only working your sights to the
> precision of of one second of time, then you make no change and the NA
> is always right to this level of precision. This change will result in a
> change of the GHA by 0.25 minutes which is de minimus at this normal
> level of precision. If you are a perfectionist then you have always made
> the corrections of the tenths of a second broadcast on WWV so you will
> just go on doing the same thing except the value you use will change
> from the current plus 0.6 seconds to a minus 0.4 seconds. When you apply
> these corrections properly there will be no change in the GHAs.

I thought I might look to the GHA of Aires in the daily pages of the NA
for confirmation that they do not add a leap second to the tables, but 1
s is a little below its resolution.  The GHA of Aires usually toggles
back and forth between an increase of and 0d 59!1 and  0d 59!2 change
within a 24 hour2 over a two-day period.

There is no indication of that pattern being broken around June 30th,
until it reaches the difference between 0 hours July2 and 0 hours July
4, where the difference remains 0d 59!1 for two consecutive days.  Given
the resolution that is evidence of nothing more than rounding, so no
help there.

Bill B

   

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