Date: Sun, 31 Mar 2002 13:25:49 -0700 (MST) From: "M. Warner Losh" <imp@village.org> To: dp@penix.org Cc: hackers@FreeBSD.ORG Subject: Re: GPS time. Message-ID: <20020331.132549.127506348.imp@village.org> In-Reply-To: <Pine.LNX.4.43L0.0203291757560.4473-100000@saruman.xwin.net> References: <Pine.LNX.4.43L0.0203291757560.4473-100000@saruman.xwin.net>
next in thread | previous in thread | raw e-mail | index | archive | help
In message: <Pine.LNX.4.43L0.0203291757560.4473-100000@saruman.xwin.net> Paul Halliday <dp@penix.org> writes: : I just connected my gps (garmin gps III plus) to my serial port : and realized that simply cat'ing cua0 displays date/time/position of the : unit. (neato). Anyway, how accurate would it be to use the time from this : output for ntp as opposed to my current setup using ntp servers. Generally the output time from these receivers via the serial port isn't very good from a precise time keeping point of view. There's about 10ms of variation in the reported time, which makes them very very noisy for the sort of work that ntp does. For a local network, it shouldn't be too bad, but expect to see a lot of strange things happen because the error can be so large. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020331.132549.127506348.imp>