[ntp:questions] Bought a GPS receiver--What next?
brad at stop.mail-abuse.org
Mon Nov 1 20:16:10 UTC 2004
At 1:20 PM -0600 2004-11-01, W. D. wrote:
>> > He says that you need to rebuild the kernel, but others
>> > say that it's possible to get better accuracy if you don't.
>> > What's the real, full story?
>> For FreeBSD, you do not need to rebuild your kernel, if you want
>> refclock support in your NTP server. The kernel should already have
>> everything you need in this respect.
> OK, how do I implement this? What should I put in /etc/ntp.conf
> to activate this?
You don't. This has nothing to do with /etc/ntp.conf.
This has everything to do with building the ntpd binary itself.
> OK, what is the procedure to build-in Oncore support? How is
> refclock_oncore.c integrated into the NTP executable programs?
The information you need is included in the source tarball you download.
> I am running:
> version="ntpd 4.2.0 at 1.1161-r Tue Oct 5 23:55:53 CDT 2004 (2)"
> that's the most recent version, yes? If it's not configured
> for refclock support, how do I do this?
You have to rebuild the binary.
> Also, it is suggested that I need the configuration file:
> What is the format of the file--what are the appropriate
> commands and settings? I don't see this documented
> fully anywhere.
I'm not sure. Someone who has more experience with Oncore
receivers would have to answer these questions.
> Twiki pages are also inscrutable:
I can't make much out of this page myself.
Before you get into the configuration details, I think you need
to first look at designing the network of time servers. See
> I guess if I can't get satisfactory answers to these
> questions, I'll just try to slog through Art Neilson's
It looks to me like these instructions are pretty old. They talk
about xntpd, for example. The date/time stamps on the files are from
I don't know how useful they are going to be.
> Again, does anyone know how talk to this unit to find out my
> latitude, longitude and elevation? How many satellites
> it sees?
Again, someone else will have to answer these questions.
Brad Knowles, <brad at stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
More information about the questions