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    Re: [Fwd: Re: LORAN-C to be shut down.]
    From: John Huth
    Date: 2009 Dec 6, 18:30 -0500
    I think there's a way of getting a fuller listing by clicking the right buttons.

    The main issue, however, is that only a fraction of the stations you might get off such a list would be suitable for an emergency-style AM radio navigation.   An enterprising Nav-lister might be interested in the task of sorting through suitable high power AM stations along the US coastline and catalog them.   Heck, even do the NAD27 to NAD83 conversion just for grins. 



    On Sun, Dec 6, 2009 at 5:01 PM, Gary LaPook <glapook---.net> wrote:
    And only a 42 meter shift in the Boston area from NAD27 to NAD 83 (which
    is virtually identical to WGS84.)

    gl

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    Lu Abel wrote:

    Do you have a URL for this list of lat/long for US stations?   I've searched the FCC site and the only thing I can find is something where you have to identify each individual station and after a few clicks you can get its antenna location.   And then it's in NAD27 coordinates!


    ------------------------------------------------------------------------------------------

    If you have to worry about the antenna coordinates being NAD27 instead of NAD83 or WGS84 then you are cutting your navigation too close. And what datum was used for the chart that you are looking at?

    Here is an example of the data from the website I have previously posted.

    http://www.fcc.gov/fcc-bin/amq?list=0&facid=9637

    It is for the KABC in San Francisco. It gives the antenna location in NAD83 but allows you to convert to NAD 27 which results in a shift of only 96 meters.

    Considering the error band when using an RDF it sounds like you are attempting to polish the cannonball.

    gl
    Do you have a URL for this list of lat/long for US stations?   I've searched the FCC site and the only thing I can find is something where you have to identify each individual station and after a few clicks you can get its antenna location.   And then it's in NAD27 coordinates!

    Thanks

    Apache Run



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