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    Re: Refraction
    From: Marcel Tschudin
    Date: 2005 Aug 7, 12:54 +0300

    George wrote:
    > My best answer to Robert's enquiry is that he is likely to see unexpected
    > values of dip whenever there are mirage-type effects near the horizon;
    > when
    > distant ships appear to have expanded upperworks or float above the
    > horizon. What weather conditions give rise to such effects, I don't know.
    > But if there are no nearby vessels to show up such effects, just a clear
    > horizon, how can you tell?
    This refers to terrestrial refraction.
    > Marcel Tschudin wrote-
    >>I think you might have more success to ask this question some
    >>As already mentioned temperature inversions are very much disturbing. A
    >>meteorologist  may tell you all the signs of this like e.g. type of clouds
    >>etc. May be you can start here
    These thoughts referred to astronomical refraction

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