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    Re: Averaging lunars: was Lunars with SNO-T
    From: Alexandre Eremenko
    Date: 2004 Nov 2, 10:03 -0500

    Dear Herbert,
    Thank you for the references.
    As I understand from your last messages on
    the topics, these authors only discuss a Least Square algorithm,
    but DO NOT discuss why the simple averaging of the altitudes
    can sometimes be wrong, that is they do not discuss non-linearity
    of the altitude changes?
    Did I understand correctly?
    On Tue, 2 Nov 2004, Herbert Prinz wrote:
    > You had asked for the references that I made to articles discussing
    > relevant LSQ algorithms in
    > "Navigation: Journal of The Institute of Navigation"
    > C. DeWit, Optimal Estimation of a Multi-Star Fix, Vol. 21, No 4, 1974-76
    > Robert W. Severance, Overdetermined Celestial Fix by Iteration, Vol. 36,
    > No 4,  Winter 1989-90
    > Thomas R. Metcalf, Frederic T. Metcalf, On the Overdetermined Celestial
    > Fix, Vol. 38, No. 1, Spring 1991
    > There are probably many more, but these are the references in have noted
    > down.
    > Regards
    > Herbert Prinz

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