On Mon, Feb 27, 2012 at 4:29 PM, John Hasler <jhas...@newsguy.com> wrote:
>> I could imagine that the signal is too weak for timing but strong >> enough to get location info from the sattelite. It works the other way around. You need four satellites to get location but once you know your location only one is needed for time. (This assumes the sure GPS has a timing mode where you set a fixed location. All timing GPSes have this.) The other thing is that GPS satellites only send and time their orbital elements. They leave it to the receiver to use that to compute the satellite's location. So as the signal got worse and worse the last thing you'd loose is the ability to keep time. Chris Albertson Redondo Beach, California _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
