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    Re: Protecting GNSS and Users - The Ideal APNT
    From: Brad Morris
    Date: 2018 Oct 5, 14:33 -0400
    A presentation by Helfrick on the same topic (download)

    I have attached the presentation as a courtesy.

    In this presentation, Helfrick proposes eLoran as the APNT system.  Further he states 0.3 nm accuracy for eLoran, 95% of the time.

    Helfrick also summarizes the same threats we have discussed recently.  The threat of solar events is not specifically mentioned.

    Neither the article by Dr Langley nor the presentation by Helfrick states CN as an APNT system


    On Fri, Oct 5, 2018, 1:54 PM Richard B. Langley <NoReply_Langley@fer3.com> wrote:

    "To best protect their citizens, economies and national security, policy makers should look for several specific characteristics in APNT [alternative positioning, navigation, and timing] systems and how they should be deployed."

    More: http://insidegnss.com/protecting-gnss-and-users-the-ideal-apnt/

    -- Richard Langley

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    File: 143008.helfrickapnt.pdf
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