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    Re: Need help writing a slope-fit excel sheet
    From: Bill B
    Date: 2014 Jan 25, 20:08 -0500

    On 1/24/2014 8:03 PM, Greg Licfi wrote:
    > P.S.
    > Typically how many sights on average should one take, and over what time
    > span?
    The Burch method gives you a straight line using anything near the start
    or end points as input. Like an LOP, it is a small section non-linear
    curve. Therefore it can be treated as a straight line if the time span
    is short enough.
    Time of day, and declination and rate of change are factors. As a rule
    of thumb I would limit it to 5-6 minutes time. Hopefully you can take
    and record 5-6 observations in the time period, the more *good*
    observations the better.
    That's my 2 cents worth.
    Bill B

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