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: Lunars and accuracy generally
    From: Frank Reed
    Date: 2013 Jan 7, 09:36 -0800

    Bill B. wrote previously:
    "Your online almanac lists the Sun's SD as 16!27, yielding a diameter of
    32!54."

    And I answered:
    "I don't know if I would trust the hundredths digit in this case. "

    Well, I've changed my mind. You CAN trust the hundredths digit to +/-1. So if my online Nautical Almanac says that the diameter of the Sun is 32.54' then you can count on it being within the range 32.53' to 32.55', so no concern for any celestial navigation observation that I can think of.

    And to reiterate regarding the context, Greg's determination of the Sun's diameter using his sextant manually was actually a bit more accurate than his determination with his digital camera.

    -FER
    ----------------------------------------------------------------
    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
    ----------------------------------------------------------------

       
    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