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: Classification of the methods for clearing the Lunar Distances
    From: Herbert Prinz
    Date: 2003 Apr 11, 04:36 +0000

    Fred Hebard wrote:
    > I believe the "short" vs "rigorous" solutions to which Jan refers are
    > based on whether the relevant equations are solved explicitly rather
    > than by some approximation to the solution, such as substitution of the
    > first term of a Taylor series for a sine function.  In this sense,
    > couldn't St. Hilaire's method be either short or rigorous depending on
    > how one determines Hc?
    The modern intercept method cannot be classified as a rigorous solution to
    the combined altitude problem, because the true position (the intersection
    of the two circles of equal altitude) is approximated by the intersection
    of two tangents to these circles. The error depends on how close the
    assumed position is to the true position.
    As for the original Marcq St Hilaire method, the inventor called it
    "methode du point rapproche", which says it all.
    Best regards
    Herbert Prinz

    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