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: Lunar-distance almanac errors [was; The Online Nautical Almanac- beware!]
    From: Frank Reed CT
    Date: 2004 Jul 13, 17:34 EDT
    George H wrote:
    "What they have left us is more often just a deduced
    longitude. That deduced longitude is affected by

    1. any errors in their measurements.
    2. any errors in their data reduction process.
    3. any errors in the nautical almanac tables.

    We can not do much about the first two, but if we know those errors in the
    tables, it would allow us to adjust out their effect on the deduced
    positions by a corresponding amount, without knowing any details of how the
    longitude was arrived at."

    Aha. Yes, I can see some value to that. Thanks!

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