On 9/24/11 1:58 AM, Magnus Danielson wrote:
It would be interesting to see what a combination of mutual
synchronisation within a constellation and central synchronisation would
yield. Your constellation would maintain contact with each other and
pull eachother to some form of average time (according to arbitrary
time-scale) and then use the earth link to provide long term
corrections. A good mutual synchronisation strategy would allow the
constellation to shrink and grow without falling completely appart.
If you provide ranging mechanisms within the constellation path delays
can naturally be compensated out of time.
Precisely so. I figure the whole "synchronization/syntonization of an
ensemble of clocks of varying quality with aperiod updates" has probably
been addressed in the literature in some way.
I would expect that a fancy implementation might return different
uncertainties for different times in the future (e.g. I might say that I
can schedule something with an accuracy of 1 millisecond in the next 10
minutes, but only within 30 milliseconds when it's 24 hours away)
This is true, but if you need higher certainty at a particular time you
can schedule a synchronisation event or two where uncertainties can be
reduced. If you have the Kalman state and state-vector, you can run the
predictor into the future.
That is what I was thinking.
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