[ntp:questions] Re: HELP PLEASE::: NTP Garmin GPS 18lvc with PPS andgpsd
David J Taylor
david-taylor at blueyonder.co.not-this-bit.nor-this-part.uk
Mon Jul 31 17:38:28 UTC 2006
sleek daelite wrote:
> <questions at lists.ntp.isc.org>Hey guys,
> Could anyone help me with Garmin GPS 18lvc device that comes with PPS
> output. I've been trying to configure the device to achieve about 1ms
> accuracy. The specification of this device states it could achieve
> about 1ns accuracy. Im quite puzzled as to why i can't achieve such
> accuracy. My software include:
> Debian Kernel 2.6.16-2-486
> gpsd 2.33
I believe that those who get the best accuracies use FreeBSD.
I would have thought that 1ms was quite easy to achieve, providing your
GPS has a good view of the whole sky hemishpere. Even my own system gets
10 - 20us and it can hardly see half the sky!
and that's just using an old Pentium 133 with 48MB memory....
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