Hi Bill:
The telescope has around arc second pointing capability so I think he
needs a hundredth of a second or slightly better.
What's now done is to manually bring the scope onto a half dozen known
stars (called a short run) which sets time in the tracking software.
But if the tracking computer had much better time the short run would no
be needed.
I've found some NMEA software that will set a PC clock, but it expects
the data on a COM port. Don't know how it might work with USB data.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Bill Hawkins wrote:
Brooke,
Google says the SD-200 speaks 4800 baud NMEA at 1 second intervals.
It is not clear whether the message is fixed of if it will reply
to queries.
Your question only concerned cost. Is one second accuracy adequate?
Bill Hawkins
-----Original Message-----
From: [email protected]
Sent: Friday, November 26, 2010 3:43 PM
To: [email protected]
Subject: [time-nuts] USB Low Cost GPS Timing Receiver
Hi:
A friend is looking for a low cost GPS receiver to set the clock in the
computer that controls his telescope mount. USB would be nice but is not
a requirement.
For example does eBay item 130456356506 set the computer clock?
This GPS receiver for the Nikon has a mini-USB connector, but when
connected to my computer is not recognized.
http://www.prc68.com/I/Nikon.shtml#GPS
Have Fun,
Brooke Clarke
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