[time-nuts] Thunderbolt performance vs temperature sensor

Don Latham djl at montana.com
Sat Mar 7 01:37:37 UTC 2009

I come to the Tbolt conversation a little late. Is the source code for the
servo system available?

Mark Sims
> Hello Said,
> The Tbolt that I used for the test was well aged (several months of
> operation) and stable prior to the tests.  It was only powered down for
> the 10 minutes or so that it took to swap out the old sensor.
> I tried to choose data sets that were fairly comparable temperature wise.
> I also chose the basic measurement interval to be 1 hour so that
> temperature would not be changing much over the hour.  I am fairly
> confident that the results reflect changes due to the temperature sensor.
> I wanted to make the measurement PPS drift / degree C change / hour but
> the later model (low res) temp sensor chip would seldom produce a
> recordable change in temperature over a one hour period.
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Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304

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