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: Sun near zenith sight
    From: Francis Upchurch
    Date: 2016 Sep 22, 10:17 +0100

    Thanks Frank.

    I got the same as Greg, but previously thought you could not get a fix from a single sight  (well + Az). Do you have any ground rules to cover this situation? Is it only when very close to equator or what? In what situations can you do this kind of fix?

    Francis.

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Frank Reed
    Sent: 22 September 2016 01:14
    To: francisupchurch@gmail.com
    Subject: [NavList] Sun near zenith sight

     

    This is a screen cap from my gps anti-spoof app taken today, live, by Bob Miorelli from a location where, as you can see, the Sun was nearly at the zenith. There is enough information here to figure out his position. By luck the volume controls on his phone momentarily covered the displayed GPS latitude and longitude. You have the calculated Sun LL altitude (assume height of eye is zero [edited after follow-up from Bob] and zero index error) as well as the azimuth and the date and time. Solve!!

    Frank Reed
    ReedNavigation.com
    Conanicut Island USA

    Attached File:

       
    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)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site