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
    Lunars: altitude accuracy
    From: Frank Reed CT
    Date: 2004 Oct 24, 03:34 EDT
    When shooting lunars, accuracy in the altitudes doesn't matter much. We've all heard that. But how much does it matter? I propose that you can get by with a 6 arcminute error for lunar distances around 90 degrees, assuming you want no more than an 0.1 minute resulting error in the cleared distance, but that generally the required accuracy (for constant altitudes) is proportional to the sine of the distance which means that for short distance lunars, the altitudes have to be significantly more accurate. This is yet another reason why short distance lunars would not have been popular historically.

    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
       
    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)