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: 3 sights SR example
    From: Andrés Ruiz
    Date: 2017 Jul 4, 08:35 +0200
    Yes Yves,

    maybe a nautica astrolabe, jajajaja

    The same example with an error of Ho + 3'/60

    Date UT Star GHA Dec Ho
    20/02/1990 06:39:15  Sirius 148º 34.2' 16º 42.2' S 57º 43.6'
    20/02/1990 06:40:54  Capella 171º 10.3' 45º 59.6' 32º 13.1'
    20/02/1990 06:42:34  Pollux 134º 23.9' 28º 3.1' 30º 2.9'

    1. Solution by MSH LS SR: 11º 04.1' S, 178º 38.8' E
    2. Fix by bisectors: 11º 06.0' S, 178º 35.6' E
    Error(1,2) = 3.7 nm

    Imágenes integradas 1
    Best regards,

    2017-07-03 21:13 GMT+02:00 Robin Jouan <NoReply_RobinJouan@fer3.com>:

    Andrés,

    OK, but it is tricky :

    - 18' systematic error is a lot ! May be with a Jacob cross-staff ?

    -  and this is combined with geometrical bad-conditioning (DOP = 3.9) !

    I think you should have mentioned that there was a big systematic error.

    Yves




    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/

    File:


       
    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