Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Cellphone camera as sextant
    From: Bob Goethe
    Date: 2015 Mar 27, 22:04 -0700

    I hypothesized that my cellphone inclinometers had an "instrument error" equivalent to an index error of 33.0' off the arc.

    I took three moon sights tonight in crystal clear skies, spaced one hour apart.  In each case I came up with an LOP that lay within ±4 nm of my GPS position.  I am content to say that my cellphone would serve as an adequate practice sextant, providing the raw data for doing sight reduction and plotting of moon shots.

    I *was* able to see Jupiter clearly in my cellphone camera display tonight, however, the cross hairs covered the planet up if I managed to come close to centering it.  Of course, once you have covered a planet with a vertical crosshair, you don't know whether you are high or low...only that you have your bearing perfect. So I didn't bother to record an altitude.  The current generation of software (in this case, "AR Bearing") is not adequate to do star/planet sights.


    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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