[time-nuts] Can Lady Heather Keep Computer Clock On Time?
brooke at pacific.net
Thu Jul 29 14:04:07 EDT 2010
I have a friend who's setting up an observatory and the PC that controls
the telescope needs to have an accurate clock.
The telescope can point to within arc seconds of a star and that implies
that the computer clock needs to be within 50 ms.
If he does a Windows NTP sync first thing in the evening after a few
hours there's too big an error. Running the observatory is like flying
a 747, i.e. there's a lot to do and the time needs to be handled
automatically, not by manual NTP updates.
I know that TAC32 and a Motorola GPS will do this and you have a lot of
options of how it does it. For example at a specified time interval or
when the computer clock differs from GPS by a specified amount of time
(50 ms in this case).
What are the options in LH? I ask because it's a lower cost option then
the Motorola GPS plus TAC32 option or building a NTP time server.
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