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: Refractional flattening of sun or moon
    From: Frank Reed
    Date: 2010 Apr 3, 09:42 -0700

    Marcel, you wrote:
    " What do you mean here Frank? Are you really doing more than just applying the "normal" refraction?"

    No, it's just normal refraction. It has to do with the way the work is organized in the lunars clearing process. One mostly works with the positions of the centers of the Sun and the Moon. That means that the change in the Sun's or Moon's apparent shape has to be accounted for as a change in its semi-diameter at the beginning when that is added to (or in the case of a Far Limb sight, for the Moon's SD, subtracted from) the observed lunar distance.


    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.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