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
    Re: Recent occultation
    From: Antoine Couëtte
    Date: 2022 Jun 21, 11:06 -0700

    Hello Robin,

    You just wrotehowever for occultations you should really be using the ellipsoid. " .

    Fully agree here. Since you mention my name in your post, I am simply indicating that I am using Cylinder / Sphere intersection only to determine a first "start up" Approximate position.

    Then from this Approximate position I am using Ellipsoid (currently sea level, but no problem for entering altitudes), and refraction for numerical iterations.

    For occultations, Ellipsoid is to be used indeed since Lady Moon's parallax is not negligible at all here.

    Best Friendly Regards

    Antoine

       
    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