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    Re: Quad regression for Lunar Distances?
    From: Tony Oz
    Date: 2018 Nov 21, 07:04 -0800

    Dear Frank,

    You suggested this article:

    https://davidburchnavigation.blogspot.com/2018/11/fit-slope-method-to-analyze-sextant.html

    English is not my native (and I'm not so prominent in Mathematics either!) so it is difficult to me to discuss these matters.

    Intuitively I was thinking (when creating this topic) along the same line - there is a lot of a priori knowledge about the altitudes and their trends which we must use as restrictions of the curve-fitting process. The article puts it very clearly.

    Just one comment though: we are expected to have rather good DR to use it for the slope selection. If our DR is not so good - could we do more harm than good by introducing a wrong slope?

    Please comment.

    Regards,

    Tony

    60°N 30°E

       
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