On Mon, Nov 4, 2013 at 3:51 AM, Bob Camp <li...@rtty.us> wrote: > ..... I can guess it's a vector difference between each two successive > points converted to ns,
That vector difference has to include altitude. Then as you say, convert distance to time via the speed of light. But I think this is only the upper bound of the error, it could be much less because there are multiple satellites in view. That 3 ns per meter rule of thumb is very conservative. But on the other hand,... On your specific make and model of GPS they could have simply dropped precision on the time, thinking that "0.01 second is good enough" and allowed some approximations. You can't assume the calculation is perfect. You'd have to measure. Is there a spec for timing error? -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.