Richard B. Gilbert wrote:
On 12/22/2011 9:17 PM, Chris Adams wrote:
The securities traders (especially HFT) want it. I suspect the OP is in
that group. That level of timekeeping has been discussed here before.
I think that the radio astronomers are some of the most demanding.
They need far better than just PPS accuracy, they normally use
common-view GPS in the same mode as is used for comparing UTC master
clocks, i.e. with eventual accuracy in the low ns range.
This is sufficient to phase-lock multiple radio observatories
synthesizing a _very_ long baseline receiver.
Terje
--
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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