On 3 Sep 2010, at 08:44, Michael Sokolov wrote:
Tony Finch <d...@dotat.at> wrote:
Oh, do tell, where will you get your GMT reference from?
If I have trouble figuring it out myself, I'll just E-mail Rob Seaman
and ask him what time it is.
Suppose I wish to measure 10 solar seconds from now, forward. I have
a clock ticking SI seconds at arbitrarily high precision and
resolution. How do I find out how many SI seconds I should count in
order to count ten UT1 seconds? Can I determine that value
prospectively, or only retrospectively?
The reason I ask is that in a mean timescale, it obviously matters
which range of time is the basis for the average. I'm not clear if
it's the (some period) up to the beginning of the interval, (some
period) up to the end of the interval, (some period) up to some other
datum or what. In several of these scenarios, it's not obvious how
you would determine the conversion between UT1 seconds and SI seconds
prospectively.
ian
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