My son was a real rocket scientist for the USAF and did a bunch of work on the GPS satellites. He told me if I ever had a spare 168 hours, he could explain in detail how GPS, GPS tracking, GPS time and GPS orbits really worked! Never have taken him up on the offer.
Carl Webster Consultant and Citrix Technology Professional http://www.CarlWebster.com > -----Original Message----- > From: Ben Scott [mailto:[email protected]] > Subject: Re: Public time sources > > On Thu, Sep 22, 2011 at 11:59 AM, Paul Hutchings > <[email protected]> wrote: > > With my tinfoil hat on, do they take any steps to ensure the accuracy > > of your time if you choose to join the pool? > > The ntp.org pools consist of thousands of autonomous donor systems. > Your level of assurance is proportional to the number of servers you > associate with. Want a higher level of assurance? Use more servers. > Anyone lying to you will quickly be seen as out-of-sync and discarded. > At least, that's the way Delaware NTP works; I can't speak to Microsoft's > implementation. > > One can also use GPS as a highly-accurate time source (sub-second > accuracy). I'm told implementation cost can be under $100. So that's an > option for the truly demanding. (GPS depends on time sync (each satellite > has an on-board atomic clock), so by definition any GPS receiver has highly- > accurate time. Not all of them expose it in a useful fashion, though.) ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
