[time-nuts] Jamming GPS

[Scott A Sybert]

I can't think of a better place for the technical users of a system to discuss and test the vulnerabilities of the system in which they depend on. 
 
If the system is vulnerable, it should be well known and redundancy should be made available. A false sense of security is no security at all.  If there are concerns lets discuss and test them and let the cards fall where they may.  If the outcome is GPS is at tremendous risk because the 9V attack is REAL and EFFECTIVE, so be it.  We're better off knowing this info now and preparing for it than finding out the hard way when the bad guy figures it out first.
 
This entire discussion stemmed from the 2010 EOL of LORAN.  I think we've all agreed GPS IS vulnerable.  It's just to what extent and how easily interruption can be caused.
 
Like I said yesterday,  we're not covering anything a true enemy hasn't discussed.
 
Building experimental jammers in our basements for educational purposes is easily dwarfed by the resources of a serious attacker (i.e. foreign government, terrorist organization, etc).
 
Scott
 

________________________________

From: time-nuts-bounces at febo.com on behalf of EWKehren at aol.com
Sent: Mon 11/16/2009 10:20 AM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Jamming GPS



Having followed the discussions on GPS jamming I have to question if this 
is a safe forum for such open info. In the wrong hands it allows the wrong 
people to cause serious problems.  Bert Kehren


In a message dated 11/16/2009 10:18:39 A.M. Eastern Standard Time, 
wpxs472 at gmail.com writes:

All the  discussion regarding jamming GPS has been very interesting. Because
it is  spread spectrum, I always assumed it would be difficult to jam GPS.
The  Monterey Bay incident indicates that it is extremely easy to jam GPS.
So,  as soon as another project is out of the way, I intend to do  some
experiments, more of a practical than scientific nature. I have a  Z3801 and
Tbolt to start with. I would also like to experiment with a hand  held and a
GPS enabled cellphone. To prevent unintended interference,  signal levels
will have to be carefully controlled and transmission time  will have to be
kept short. I want to try CW as well as modulations of  varying types. Any
suggestions as to the most effective modulation type to  try?
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