Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Lunars with SNO-T
    From: Fred Hebard
    Date: 2004 Oct 26, 21:00 -0400

    On Oct 26, 2004, at 8:34 PM, Alexandre Eremenko wrote:
    >> So it was a borderline case,
    >> but one where conventional wisdom says rejection is OK.
    > Borderline by the standard deviation criterion.
    > But there are other criteria for rejection (besides
    > convential wisdom).
    > In a series where the distance SHOULD INCREASE (this I knew
    > in advance, of course),
    > and 5 of the 6 observations clearly follow increasing pattern
    > but one does not (and substantially!) this one had to be rejected.
    > If one accepts this one
    > (I am always talking of my particular series of numbers!)
    > one had to reject the TWO previous ones.
    > This was my (almost unconscious) argument.
    > I did not compute any standard deviations. This was just
    > plane common sense.
    > On the other hand (as a scientist:-) I carefully recorded it
    > to be able to reduce it separately when needed.
    I believe you might find that the two procedures are equivalent,
    although yours is harder to quantify.  Remember Frank Reed's posted
    lunar that was almost simultaneous with mine last month?  There was a
    slight bump in the steady change in distance.  It was quite small and
    he accepted it.
    I also wasn't suggesting that standard deviations be calculated to
    reject data points, but rather was using a convenient metric ready at
    hand with the reduced data.

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site