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    Re: Meridian-anchored Noon Sun
    From: David Fleming
    Date: 2018 Jul 8, 13:18 -0700

    Peter,

    Either I missed your point or I think you missed Frank's point.

    You said with the Sun near zenith ...,

    I thought you meant on a day where the meridian transit would pass overhead.  Is that what you meant to say?

    On such a day, The altitude above east or west horizon will change at 15 degrees/hr, all day long.

    There is no extended time period when the altitude doesn't change with time.

    Frank's hypothetical is trying to get a meridian transit sight, ex meridian, by using north or south horizon and letting the altitude error for non vertical altitude produce the added ex meridian altitude.

    DaveF

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