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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