[hpsdr] multiple receivers - is it really necessary

[Bob McGwier]

It is tough to understand why anyone is this group would harbor 
neoluddite tendencies when even non-geek contesters see the benefits:

http://n4hy.blogspot.com/2009/06/contest-for-geeks.html

This is for all CQ WW SSB and CW contests starting in the fall.

Bob
N4HY


Mike Hamel wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Graham,
>
> I have a friend who has a knack for putting things bluntly, and when I
> talk with him about the potential applications for networked
> multilocation SDRs, he dryly says "ok, but is it really radio anymore?"  :-D
>
> Thanks for the VLBI references. I will get a stepladder and check them
> out (likely a bit above my head).
>
> Regards,
>
> Mike
> wo1u
>
> Graham / KE9H wrote:
>   
>> Mike:
>>
>> There are techniques that do this, see
>>
>> http://www.gpstime.com/
>>
>> and read the "Timing for VLBI -2009"  presentation by Tom Clark (K3IO),
>> and Rick Hambly (W2GPS).
>>
>> They are time stamping radio astronomy signals to (sub) nanosecond
>> accuracies
>> and can ship recorded signals from western China back to the US, and then
>> assemble and post process them into "Very Long Base Line" received signals,
>> with an aperture equal to the diameter of the earth. Using GPSDOs as the
>> discipline and sync for an accurate time base.
>>
>> Just time stamping to several nanosecond accuracy is enough to recover
>> phase
>> information for HF signals.
>>
>> So, if every member of the Austin Amateur Radio Club made his home station
>> available to the club station as one element of a phased array antenna
>> system
>> during a contest...
>>
>> Is it single operator or multi operator?
>>
>> Is it limited to 1500 Watts transmit power per licensed location, or
>> "just" 1500 Watts
>> total for the entire networked "antenna."
>>
>> What if members of this list, in different countries, did the same thing?
>>
>> :-)
>>
>> --- Graham / KE9H
>>
>> ==
>>
>>     


-- 
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