[Milsurplus] More FCC foolishness

[Peter Gottlieb]

  As I understand it, accuracy is way better than one degree.

Close enough to find Galt's Gulch.



On 9/15/2010 9:49 PM, J. Forster wrote:
> I repeat my point. DF will not really nail down a Tx location. It can, at
> best, get you in the area.
>
> If you are 100 miles from the Tx and have a 1 degree accuracy in DF
> bearing, your estimate of position is about 1.5 miles. At 1000 miles, it's
> 15 miles.  That's a lot of area to search.
>
> -John
>
> ============
>
>>> : The ability to DF intermittent signals of even a few msec has been with
>>> : us for ten years. If a serious target gets on their radar you don't
>>> have
>>> : a chance of avoiding detection to a very high degree of accuracy.
>>>
>>> Now walk to the next room and the original location is useless.
>> The capability to DF even very short-lived intermittent HF signals is a
>> science that was perfected almost 70 years ago.
>>
>> Just look at the British FH-4 HFDF set for an example.  These were able
>> to point the signal's direction on a CRT display even in response to the
>> very short Morse burst signals of nearby U-boats.  Huff-Duff was a very
>> effective system, as the Kriegsmarine found out.
>>
>> Amazing technology, and not a microprocessor anywhere!
>>
>> There's nothing new about instantaneous DF.
>>
>> Mike / KK5F
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>
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