mailing list archives
Re: GPS SA and Network Timing
From: Petr Swedock <petr () ai mit edu>
Date: Wed, 26 Sep 2001 21:03:13 -0400 (EDT)
: "Hire, Ejay" <Ejay.Hire () Broadslate net> writes:
: > In our next episode of Militant dictator How-to, we'll show you how to
: > upgrade an antique scud missile to with a guidance system capable of 3-meter
: > accuracy for less than $500.00 per unit.. Stay tuned!
: Somehow, I find it difficult to believe I'm dignifying this with a
: response (much less a public one), but here goes:
: Every commercial GPS unit that I have ever seen has a speed which, if
: exceeded, will cause the unit to shut down (usually until
: power-cycled). It varies from unit to unit, but in every observed
: case was substantially (several times) less than the speed of such
: weaponry in flight.
There's also acceleration/decceleration effects: in a missile
that goes from zero to 'sweet mother of Abraham Lincoln!!!' in
less than the time it takes to send a content-free post to NANOG,
a commercial (off-the-shelf) GPS won't last til the projectile
reaches max V.
: Resist the cycle of content-free posts to NANOG...
Systems, Networks and Gadgets, done with Artful Intelligence
Policy: ASCII/text attchmnts alway read. PDF maybe read. Others, by
necessity, may be ignored. Don't take it personally, it's a time issue.