[Milsurplus] More FCC foolishness

[Peter Gottlieb]

  The fun part is the new 406 MHz ELTs which transmit a 500 msec burst of data 
every 50 seconds.

Old style DF techniques just don't work well with that system.



On 9/16/2010 4:11 PM, J. Forster wrote:
> The further you get away from the DF station the larger the uncertainty.
>
> arc = radius x angle.
>
> The search triangle area grows as the square of the distance.
>
> -John
>
> ================
>
>
>> de WB2CPN
>> You don't DF with only one receiver unless you're within
>> yards of the transmitter.  Real DF is done with three DF
>> stations.  The plot will produce a triangle.  There are two
>> ways to reduce the triangle to a point, and all this is
>> not new.   Most DF I've seen, or done, is guiding an
>> aircraft to the DF station, crooked as the path may turn
>> out to be.
>> 73  Clete
>>
>>
>>
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>
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