On Nov 21, 2011, at 10:57 PM, Jim Lux wrote: > On 11/21/11 5:15 PM, Bob Camp wrote: >> Hi >> >> You can have a surveyor come out and locate your gizmo to sub one inch >> accuracy for a lot less than a clock trip costs. A one meter ( or 3 ns) >> error would be pretty large these days. Both have been demonstrated / proven >> so often that they aren't really open to challenge. >> >> The total error is a sum of lots of things. Location and time of day are the >> easy stuff... > >>> OK, So assume an unlikely huge position uncertainly of one meter. On top >>> of >>> that let's assume the surveyor got it wrong too and missed by a full >>> meter. Both of these added together can only account for about 10% >>> of what they saw. Light moves across one meter in about 3nS You >>> need to explain 60nS If the result is because of uncertainty in the >>> location then the we are talking about 20 meters of position error. > > > > in the first paper, the distance uncertainty was given as 20cm
Of which the survey likely contributed next to nothing and stuff like earth tides contributed the majority of the error …. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
