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    Re: Can I Navigate Without an Assumed Position?
    From: Hien Thanh Nguyen
    Date: 2017 Sep 12, 19:11 -0400
    Hi Stan,

    It is wonderful to know that you are still here with the group. I am still thankful for your initial introduction to the group and your help with the app development several years ago. I enjoy the many discussions in this forum even though I didn't have much of a contribution. But Yves's recent message really piqued my interest since I have been talking with Dale Lichtblau about a method for finding the fix without the use of an AP location.

    Hien

    On Tue, Sep 12, 2017 at 6:18 PM, Stan K <NoReply_StanK@fer3.com> wrote:
    Hello, Hien.  Long time.

    For those of you who might not remember, Hien is the developer of the Android app StarStruck Navigation, a bargain at $2.99.

    Stan



    -----Original Message-----
    From: Hien Thanh Nguyen <NoReply_Nguyen@fer3.com>
    To: slk1000 <slk1000---.com>
    Sent: Tue, Sep 12, 2017 5:25 pm
    Subject: [NavList] Re: Can I Navigate Without an Assumed Position?

    Hi Yves,

    Your proposal sounds very interesting. Would you be able to share your paper/algorithm with us? I am also thinking of a method for finding a fix without  the use of the AP location. It would be nice to have a method like yours to serve as a reference.

    Thanks,
    Hien

    On Wed, Aug 30, 2017 at 5:38 AM, Robin Jouan <NoReply_RobinJouan@fer3.com> wrote:
    Just a remark : Generally, 3D matrix methods can spare any assumed or arbitrary position as an input. The reason is they are not based on a differential formulation, but on a global formulation.
    With my own method ("Coplanar Vertices Method") the assumed position is used only to find its distance to the computed solution at the end of the process.
    In fact what you need is only a sextant and a small computer: a palm PC or a smartphone can do the job, as well as a few "old" TI or HP devices (HP200XL is a famous one).
    Best Regards
    Yves


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