[time-nuts] Spoofing GPS - news article

Didier Juges shalimr9 at gmail.com
Thu Jun 28 16:37:13 UTC 2012


The picture is not of a Predator, it's a Global Hawk, a much larger
aircraft.

Didier KO4BB
On Jun 28, 2012 11:47 AM, "Brooke Clarke" <brooke at pacific.net> wrote:

> Hi Dave:
>
> The article shows a photo of a Predator, yet what the UoT guys did was
> hack a toy helicopter that used only the L1 civilian GPS signal.
> My guess is that they used a home made 3rd generation GPS simulator with a
> moderate power amp and antenna.
> http://www.prc68.com/I/5001A.**html <http://www.prc68.com/I/5001A.html><- first generation single satellite single signal
> http://www.prc68.com/I/**NTgpsSTR2760.shtml<http://www.prc68.com/I/NTgpsSTR2760.shtml><- second generation multi satellite and multi signal
>
> Note that all GPS satellites transmit on the same frequency and so in a
> sense interfere with each other.
> But because of the orthogonally of the codes the receiver can process each
> signal.
> When a higher power signal is received the "capture" effect eliminates the
> weaker signals so a high power signal can easily "capture" the receiver.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.**end2partygovernment.com/**2012Issues.html<http://www.end2partygovernment.com/2012Issues.html>
>
> DaveH wrote:
>
>> http://rt.com/usa/news/texas-**1000-us-government-906/<http://rt.com/usa/news/texas-1000-us-government-906/>
>>  Dave
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>
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