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
    or...
       
    Reply
    Re: Lunerian Apprenticeship
    From: Francis Upchurch
    Date: 2017 Jan 6, 11:35 -0000

    David,

    Just to add to my confusion, I tried your sight 1 with the Thompson abbreviated method and got a GMT of 8.17.29. (closer to your 8.23 approx time)

    I’m not even sure if this method is appropriate for Venus lunars. I’m sure Frank would know. It mostly deals with parallax corrections for the moon. It also has a mysterious 3rd correction which Thompson kept secret, but  I doubt whether it deals with Venus issues.

    Anyway, hoping to hear the correct result to work out what I am doing wrong here.

    Best wishes

    Francis

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of David C
    Sent: 06 January 2017 04:04
    To: francisupchurch---.com
    Subject: [NavList] Re: Lunerian Apprenticeship

     

    Here are last night's results  using Frank's calculator. I allowed the calculator to determine the altitudes of Venus and the Moon.

    Sight 1

    Error in Lunar  -1.5'

    Error in long  45.8' (approx 3 min time?)

    Sight 2

    Error in lunar -3.9'

    Error in long 1° 57.6' (30 min time?)

    Sight 3

    Error in lunar  0.3'

    Error in long 07.5'  (approx 30 seconds time?)

    I reworked sight 3, using my observed altitudes

    Error in lunar -0.8'

    Error in long  22.5'  (approx 1.5 min time?)

    Referring to the altitude observations my old school teacher would say Must try harder.

    View and reply to this message

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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