From: "Eric S. Raymond" <esr@thyrsus.com>
To: tz <thomas@mich.com>
Cc: thumbgps-devel@lists.bufferbloat.net
Subject: Re: [Thumbgps-devel] Project clarification
Date: Tue, 13 Mar 2012 21:18:56 -0400 [thread overview]
Message-ID: <20120314011856.GA25558@thyrsus.com> (raw)
In-Reply-To: <CAFv7OigZ5-o4Sz=KqZHKa3OKvUfY-g3eV7z1ibr6tGbuPKSADw@mail.gmail.com>
tz <thomas@mich.com>:
> On Tue, Mar 13, 2012
> at 7:06 PM, Eric S. Raymond <esr@thyrsus.com> wrote:
> > One the one hand, ordinary GPS can yield time-service accuracy down
> > to a second with jitter on the close order of a hundred milliseconds.
> > This is not as good as NTP, which is generally believed accurate to 10us
> > (but may not be - that's part of what we want to check).
>
> Maybe LAN NTP can go 10uS - microseconds, but pool.ntp.org is more
> like 10mS - milliseconds
Right, I typoed the prefix - 1 millisecond is the goal.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
next prev parent reply other threads:[~2012-03-14 1:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-13 21:46 Mike Hord
2012-03-13 23:06 ` Eric S. Raymond
2012-03-13 23:30 ` tz
2012-03-14 1:18 ` Eric S. Raymond [this message]
2012-03-14 1:10 ` Dave Taht
2012-03-14 1:28 ` Ron Frazier (NTP)
2012-03-14 1:53 ` Eric S. Raymond
2012-03-14 3:08 ` Dave Taht
2012-03-14 3:42 ` Dave Taht
2012-03-14 4:02 ` Ron Frazier (NTP)
2012-03-14 4:32 ` Eric S. Raymond
2012-03-14 12:44 ` tz
2012-03-14 2:28 ` tz
2012-03-14 2:46 ` Dave Taht
2012-03-14 3:05 ` tz
2012-03-14 4:36 ` Patrick Maupin
2012-03-14 5:00 ` Eric S. Raymond
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