[ntp:questions] garmin 18x and linux

unruh unruh at wormhole.physics.ubc.ca
Sat Sep 3 04:19:18 UTC 2011

On 2011-09-02, David Woolley <david at ex.djwhome.demon.invalid> wrote:
> Rob wrote:
>> You will find (you have found) that by posting on this group, your message
>> falls into the hands of a small group of people that will either base
>> all their solutions on much more stringent requirements than you actually
>> have (e.g. they don't consider using GPS serial messages because it is
>> not possible to have millisecond precision with that), or they go on an
>> on about how the requirements you post cannot be achieved at all and should
>> be relaxed or be realized with atom clocks etc.
> NTP isn't designed to work at accuracies worse than a few 10s of 
> milliseconds.

?? Where does this come from? While it is true that there is the 128ms
rule ( which I believe can be adjusted) but where is this coming from?
And besides, Garmin GPS nmea can control to better than 10ms.

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