Date: Wed, 03 May 2000 12:16:56 -0700 From: Kent Stewart <kstewart@3-cities.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Matthew Dillon <dillon@apollo.backplane.com>, hackers@FreeBSD.ORG Subject: Re: GPS heads up Message-ID: <39107B28.F1AB3DA7@3-cities.com> References: <2239.957376123@critter.freebsd.dk>
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Poul-Henning Kamp wrote: > > In message <200005031744.KAA63550@apollo.backplane.com>, Matthew Dillon writes: > > Ok, this has nothing to do with FreeBSD, but I just had to post > > something since nobody else has. > > > > By presidential order, on May 1 the error introduced into the GPS > > system, called 'SA', was turned off. > > > > This means that your GPS receivers are now around 5-10 times more accurate > > then they were before May 1st. > > This has nothing to do with FreeBSD unless you count NTP servers, > but actual data can be found on: > > http://212.242.40.185/cgi-bin/ppsoffset.cgi > It may not have anything to do with the OS FreeBSD but it has a lot to do with what we can do easily and for a really modest price. The techno-farms need to know where they are at in a field when they record data. The old offset error made it such that the operator knew where they were but the computer couldn't tell which field they were in. A simple differential was expensive. Now, you don't have the wild swings and two computers recording data using the GPS derived time may be close enough to record which plant they are taking data for. Kent > This is "gps.freebsd.dk" one of, if not the, most precise NTP stratum 1 > servers in the world: +/- 20nsec. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD coreteam member | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message -- Kent Stewart Richland, WA mailto:kstewart@3-cities.com http://www.3-cities.com/~kstewart/index.html FreeBSD News http://daily.daemonnews.org/ SETI(Search for Extraterrestrial Intelligence) @ HOME http://setiathome.ssl.berkeley.edu/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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