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: Celestial Navigation on the surface of Mars
    From: Brad Morris
    Date: 2018 Nov 11, 09:40 -0500
    Hello John

    To quote from one paper 

    "A simple, accurate, and autonomous method of finding position on the surface of Mars currently does not exist. The goal of this project is to develop a celestial navigation process that will fix a position on Mars with 100-meter accuracy."

    Inertial Navigation Systems drift with respect to time.  We cannot use the current satellites around Mars for navigation as they do not provide that service.  Until there is a constellation of GPS-like satellites around Mars, the only way to navigate, or indeed reset the INS, is via CN.  The wealth of papers on this topic shows that there is serious interest in Martian CN.  It will just be a placeholder until the appropriate satellites are aloft, but that will be some time coming.

    Here on Earth, we have the opposite.  The GNSS (and competing) satellites are in orbit and fully functional.  CN is only a distant backup, at best; a mental amusement for some; and ignored as antiquated and obsolete by the general public.  

    Brad










    On Sat, Nov 10, 2018, 11:17 PM John D. Howard <NoReply_Howard@fer3.com wrote:

    Not to burst anyone's bubble, but I do not think there will be any cel nav on Mars.  Why would there be?  People will need a satilite to radio commumate with earth - why not use the ( many ) satilites that will be around Mars for position finding?  INS would be a better opition than cel nav..

    But really, a sextant?  No oceans - no boats.  Like others have said, a transit would be better on dry Mars land.

    It would be fun for the computer programing folk to get a Mars almanac and sight reduction tables to play with.

    John H.  41N 100W

    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