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    Re: Quad regression for Lunar Distances?
    From: Paul Hirose
    Date: 2018 Nov 9, 15:04 -0800

    On 2018-11-08 7:45, Lars Bergman wrote:
    > Is there any simple method to find the expected rate of change of your 
    observed distances, without using the observed data?
    
    If you can run a Windows program, my Lunar software will give you the
    geocentric and topocentric separation angle rates per minute of time.
    The values are calculated from the space velocities of the bodies (it's
    not necessary that one body be the Moon) with no allowance for
    aberration and refraction, so the values are not rigorously correct. But
    I think the error is not significant.
    
    http://home.earthlink.net/~s543t-24dst/lunar3/index.html
    

       
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