[time-nuts] Spoofing GPS - news article

Brooke Clarke brooke at pacific.net
Thu Jun 28 15:47:16 UTC 2012


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 <- first generation single satellite single signal
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

DaveH wrote:
> http://rt.com/usa/news/texas-1000-us-government-906/
>   
> Dave
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