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    Re: Unwarranted levels of precision
    From: David Pike
    Date: 2017 Dec 20, 15:00 -0800

    Is that the top or the bottom of the aircraft? DaveP

    I once read a newspaper report that the aircraft was flying at 304.8m.

    Sounds legit :-).  With GNSS you can add another decimal place.  Given the short range, a laser tracker might work, and so add another two decimal places on top of that (but you get only relative height---there's no tie to a global frame as with GNSS).
    If you want orthometric or dynamic height rather than ellipsoidal/geodetic/ITRF height, though, you're limited to the uncertainty of the geoid, a few centimeters.
    Cheers,
    Peter
       
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