[ntp:questions] ntpd: time reset problem

Dave Hart davehart at gmail.com
Tue Sep 15 20:08:26 UTC 2009


On Sep 14, 9:33 pm, Unruh wrote:
> IF the latency is known to be symmetric ( which it is on an
> interplanetary system) then large latency is no problem. If it is not
> known to be symmetric and worse, both in and out latencies are variable,
> then it is pretty well impossible.

I believe the delays are asymmetric in large part due to vastly
different data rates from the earth to the ship (high rate) vs from
the ship (low rate).

Cheers,
Dave Hart




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