Re: [HearSat-L] What time is it, really?

Glenn Bock (
Fri, 4 Jun 1999 14:08:20 -0400 (EDT)

I use either GPS clock (the clock that's part of the GPS receiver) or
the cheaper solutuion is to find a shortwave radio and listen in on 2.5, 
5, 10, 15, Megahertz, they do exact seconds and even add in the
correction in 100ths of a second (or is it 10ths) in the first few
seconds of the minutes broadcast.  Just realize that even the satellites 
are not know to an accuracy of 1/10th second due to the fact they use
approximate corrections in the elements..

Glenn Bock

On Fri, 4 Jun 1999, J. Lee
Blanton wrote:

> Hello fellow satellite fans:
> The question of "What time is it?" is very important for making accurate
> satellite observations but isn't very easy to answer.  I've seen ads for
> so-called "atomic clocks" that are available from Radio Shack and elsewhere
> which are synchronized with low frequency time signals.  Many of these
> don't even have a 'seconds' display or can't be set to UTC.  Does anyone
> know of a really good one suitable for satellite observations?  An accuracy
> of 0.1 second or better would be nice.  I'd appreciate any advice.  Thanks.
> Lee
> _____________________________________________________________________________
> J. Lee Blanton                          email:     
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