Of course... I am designing a GPS receiver as my day job and didn't think of that ;)
Henry On Mon, Mar 1, 2010 at 8:36 PM, Mark Sims <[email protected]> wrote: > > Pretty trivial to do with GPS where a 1 ns error is under 1 foot of position > error (and a geodetic grade GPS can give sub-millimeter accuracy)... even a > cheap consumer grade unit is under 10 feet of error. 1.26 us of orbital > change is over 1100 feet of error. > > One trick is to compare the pre-earthquake GPS almanac/ephemeris data with > the post earthquake data. I suspect that a lot of geodetic monitoring > stations are scrambling to keep up with what the earth is currently doing. > > > --------------------------- > How would one go about verifying this? The angular difference after 1 > year is about 3E-8 radians, which is probably well beyond the absolute > pointing accuracy of any telescope, and swamped by lunar tidal > deceleration anyway. > > > _________________________________________________________________ > Hotmail: Free, trusted and rich email service. > http://clk.atdmt.com/GBL/go/201469228/direct/01/ > _______________________________________________ > 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. > -- Henry Hallam Sent from my Laptop _______________________________________________ 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.
