Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Longterm Sun's GHA and Dec: what's under the hood?
    From: Tony Oz
    Date: 2018 Dec 6, 11:59 -0800

    Hello!

    Recently the topic of a table for longterm Sun's GHA and Dec was mentioned, apparently referring to this publication.

    Unfortunately even the "enhanced" version of How-To accompanying that table is rather cryptic (to say it mildly).

    I wonder - what is behind all those look-up tables and corrections to further corrections? Where can I read about the topic?

    As it is published - it looks like an example of the Rules the mariners of Old had to learn by heart and execute as robots...

    Please comment.

    Regards,

    Tony

    60°N 30°E

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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