[LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

[Ian Batten]

On 3 Sep 2010, at 08:44, Michael Sokolov wrote:


> Tony Finch <dot at 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