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    Re: Watching a star for IE: an obturator trick?
    From: Brad Morris
    Date: 2019 Dec 10, 16:21 -0500

    I think the flickering "obturator" idea has merit.  After all, that's the method used by astronomers in the last century to detect objects in motion (like the dwarf-planet Pluto).  It certainly would work for IE measurements 

    The trick will be in the physical realization of the concept!   Good luck!


    On Tue, Dec 10, 2019, 3:03 PM Tony Oz <NoReply_TonyOz@fer3.com> wrote:

    Dear Brad,

    I did try this and noticed that it only is capable to discover the (big enough) side error. Even if the side error is as small as IE - it too is not that easy to observe. I calculate the IE by limb-to-limb Sun's SD measurement though.

    May be this means I'm not as skilled or my sight is aging - or, - my sextants are too old and worn...

    The only way for me to eliminate both the side error and IE - is by star+"obturator" trick.

    Warm regards,
    60°N 30°E

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