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    Refraction. was: Bubble Horizon Altitude Corrections
    From: George Huxtable
    Date: 2004 Jul 6, 11:45 +0100

    Thanks to Frank Reed for explaining further that when he wrote-
    "By the way, since you're inland, be
    advised that you should use "sea level" barometric pressure. This differs a
    little from the pressure usually reported in weather reports (but not very much
    unless you're at Denver-like altitudes)."
    he intended that local true barometric pressure at the observer's altitude
    should be used, not the pressure at sea-level. He could have fooled me (and
    did). I had quite misunderstood his meaning. After the clarification, we
    now seem to agree on that point.
    contact George Huxtable by email at george@huxtable.u-net.com, by phone at
    01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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