NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Measuring time in small boat CN: what devices do yourecommend?
From: Jared Sherman
Date: 2004 Jan 8, 22:21 -0500
From: Jared Sherman
Date: 2004 Jan 8, 22:21 -0500
From everything I've read, actually 3 atomic clocks on the old birds, and 4 on the new birds. So "GPS time" will be the result of what one bird has decided three or four atomic clocks really say, and a normal 3D fix that has polled 4 birds will be presenting a time "concurrence" from 12-16 atomic clocks. Which are corrected as needed from ground control, I believe. I think the compensation for leap seconds, etc, is in the signal that is sent, what is it, once every 14 minutes by the satellites? Not a bad way to access that many million dollars worth of clocks.