NavList:

   

Reply

Geoffrey Kolbe wrote:
> Well, my Long Term Almanac is nominally good up to the year 2050 and will
> actually work OK up until 2060. So this is a very real question for me.
>
> I am assuming that if leap seconds are abolished, anyone using my tables -
> which assume GMT, or UT1 as it is called these days - will know the
> difference between broadcast time and GMT and use this as a correction to
> broadcast time.
>
On the contrary, your long term almanac is based on the measurement of
"what time is it" at some point in time (likely when it was published).
So it does NOT correct for leap-seconds, since there is no way to
predict when they will be inserted into UTC.   So it is effectively
already practicing leap-second-less navigation.

I don't know how old your long term almanac is, but if it's old enough
it would be interesting to compare its data with current Nautical
Almanac data; I'll bet there might be some small discrepancies in some
GHA predictions.

Lu

--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply