Bob, check out http://www.atomtime.com/ for a source of seismic timing via 
the internet.
I've used it and with good results.  Rightime http://www.rightime.com/  is 
a similar program
which works well.  It will take care of that nasty PC clock drift.

I suggest that to compare local and regional seismic data with other 
stations, your clock needs
to be accurate to within 100 ms of UTC at most.

Bob Hammond
Fairbanks, AK
http://apsn.awcable.com



At 04:13 PM 8/18/2002, you wrote:
>Has anyone had any experience in the use of Internet timing for WinSDR.  I
>am interested in what is considered the maximum timing error that is
>acceptable for amateur seismic work, and also the recommended minimum
>recheck time.  In other words how often should the timing server be checked.
>
>I live in an apartment complex, on the bottom floor.  There are numerous
>trees nearby which would block a GPS receiver, and management does not want
>an external antenna.  I am also experiencing difficulty in getting a good
>WWV signal.
>
>If anyone has had either good or bad experiences with any particular program
>I would also be interested in hearing.
>
>Thank You
>
>Bob Hancock
>Randolph, NJ
>
>
>
>
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