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    Re: sextant index error measurement
    From: Peter Fogg
    Date: 2006 Nov 4, 13:14 +1100


     Bill wrote:
    I would think refraction would be for all practical purposes identical for
    both laser beams or rays from a distant celestial object.

    The experiment you are working you way towards carrying out involves observations made over a distance parallel to the ground, close to the ground. Refraction will depend on your atmospheric conditions there, and could be different to the refractive effect from sighting from eye height skywards.

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