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
    Dozier Formula
    From: Dan Hogan
    Date: 2001 Nov 19, 11:37 AM

    First I am not a trained mathematician, I need a calculator to work higher
    math ;^)
    For years I have used the dozier formula from The Calculator Afloat, by
    Schufeldt & Newcomer for sight reduction with a calculator.
    The normal Dozier formula is:
            tan Zn = sin LHA / cos LHA * sin L - cos L * sin d
    Rewritten as because of the result coming out 180 degrees off and of using
    the Polar-to-rectangular function:
            tan(Zn - 180) = sin LHA / cos LHA * sin L - cos L * tan d
    Then *using invented notation* rewritten again as:
            Zn = 180 + R->P (sin LHA * cos d, cos LHA * cos d * sin L - cos L * tan d
    Now can someone explain what the COMMA after the first cos d stands for?
    Dan Hogan WA6PBY
    C27 "Gacha"
    Nav-L Page: http://www.wa6pby.com

    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