It is not that hard to transmit broad band noise over the entire GPS channel
and clobber it entirely.
Didier
Sent from my Droid Razr 4G LTE wireless tracker.
-Original Message-
From: johncr...@aol.com
To: time-nuts@febo.com
Sent: Tue, 02 Oct 2012 9:33 PM
Subject: Re: [time-nuts] GPS
over the entire GPS channel
and clobber it entirely.
Didier
Sent from my Droid Razr 4G LTE wireless tracker.
-Original Message-
From: johncr...@aol.com
To: time-nuts@febo.com
Sent: Tue, 02 Oct 2012 9:33 PM
Subject: Re: [time-nuts] GPS Jammer
In considering the effect
On Tue, Oct 2, 2012 at 9:40 PM, Ron Ward n6idl...@comcast.net wrote:
Hi:
Other than a terrorist, who would want to jam GPS?
A delivery truck driver. His boss installs a GPS tracker on the truck
and the driver wants to take a three hour lunch break. This is a
pretty common scenario and likely
-nuts@febo.com
Subject: Re: [time-nuts] GPS Jammer
On 10/02/2012 11:05 PM, John Lofgren wrote:
The 0.5 W and + 10 dBm numbers in the specs don't work out. +10 dBm is 10
mW. I suspect that the 1/2 watt is really the DC input power.
Now, that makes sense.
And, I'd agree about the range
Let me just say that that's flea power!
I saw some 80watt jammers being sold for movie theaters and churches.
There is some very black market items from China, via Hong Kong and can
arrive at your doorstep in just 4 days via DHL! What's out there would scare
you.
Been dealing with the fall out
Who would want to jam GPS? Haven't heard this one:
Fishing party boat captain - knows where to find the fishing spots
after years of experience. Rotates use of the spots so as not to
over-fish them. Arrives at his spots to find fishermen who had gone
out with him and captured the GPS locations of
Take a look at the specs of this unit:
http://www.mobilephonejammer.com.au/covert-gps-jammer-portable-p-119.html
The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
Anybody think there is something wrong?
-John
-nuts@febo.com
Sent: Tuesday, October 02, 2012 4:43 PM
Subject: [time-nuts] GPS Jammer
Take a look at the specs of this unit:
http://www.mobilephonejammer.com.au/covert-gps-jammer-portable-p-119.html
The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
Anybody think
On 10/02/2012 10:43 PM, J. Forster wrote:
Take a look at the specs of this unit:
http://www.mobilephonejammer.com.au/covert-gps-jammer-portable-p-119.html
The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
Anybody think there is something wrong?
For a 500 mW jammer
loud compared to the nominal -130 to -140 dBm you'd hear from the satellites.
-John
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Magnus Danielson
Sent: Tuesday, October 02, 2012 4:02 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts
On Tue, 02 Oct 2012 23:01:45 +0200, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 10/02/2012 10:43 PM, J. Forster wrote:
Take a look at the specs of this unit:
http://www.mobilephonejammer.com.au/covert-gps-jammer-portable-p-119.html
The Power Output is 0.5 Watts and it claims a
On 10/02/2012 11:05 PM, John Lofgren wrote:
The 0.5 W and + 10 dBm numbers in the specs don't work out. +10 dBm is 10 mW.
I suspect that the 1/2 watt is really the DC input power.
Now, that makes sense.
And, I'd agree about the range. +10 dBm into a dipole at 10 meters gets you
about
The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
Anybody think there is something wrong?
I'd expect a much greater range with a 0.5 W jammer. But note that
0.5 W is the total output power -- the transmit power is only 10
dBm (0.01 W). Whatever those terms mean.
HI
At least from here, the link no longer works.
Bob
On Oct 2, 2012, at 7:48 PM, Charles P. Steinmetz
charles_steinm...@lavabit.com wrote:
The Power Output is 0.5 Watts and it claims a jamming range of 1-10 Meters.
Anybody think there is something wrong?
I'd expect a much greater range
On 10/2/12 4:48 PM, Charles P. Steinmetz wrote:
The Power Output is 0.5 Watts and it claims a jamming range of 1-10
Meters.
Anybody think there is something wrong?
I'd expect a much greater range with a 0.5 W jammer. But note that 0.5
W is the total output power -- the transmit power is
In considering the effect of a simple jammer on a GPS receiver, a
simple link analysis
is insufficient.
What must also be considered is the anti-jam capability of the receiver
which due to spread spectrum processing gain will reject any simple
jamming signal even though is it 10's of dB
On 10/2/12 7:33 PM, johncr...@aol.com wrote:
In considering the effect of a simple jammer on a GPS receiver, a simple
link analysis
is insufficient.
What must also be considered is the anti-jam capability of the receiver
which due to spread spectrum processing gain will reject any simple
We don't know that they modulate the jamming signal some what. I bet 10 mW
would do a good bit of harm to GPS systems even a block away.
- Original Message -
From: Jim Lux jim...@earthlink.net
To: time-nuts@febo.com
Sent: Tuesday, October 02, 2012 10:45 PM
Subject: Re: [time-nuts
John,
Coherent reproduction of the spread PRN standard positioning signal (SPS)
signal gives ~30dB of A/J protection, the GPS signal level, as received at
the GPS receiver is on the order of -160 dBW (L1-CA). If the jammer outputs
half a Watt, and is anywhere nearby, the receiver will not maintain
I talked to the GPS jamming group at Nellis a few years ago. They use
broadband noise to jam GPSs. If somebody is going to the Nellis Aviation
Nation coming up in November, the jammer group always has a static
display. They have some Soviet jammer gear they acquired.
Hi:
Other than a terrorist, who would want to jam GPS?
Ron
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Tuesday, October 02, 2012 2:28 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] GPS Jammer
On 10/02/2012
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Tuesday, October 02, 2012 2:28 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] GPS Jammer
On 10/02/2012 11:05 PM, John Lofgren wrote:
The 0.5 W and + 10 dBm
Other than a terrorist, who would want to jam GPS?
Generic bad guys who don't want the FBI tracking them. The civil liberties
types are suing the FBI to make sure the get a court document before they
install GPS trackers on suspects cars.
Truckers who don't want their boss to know what they
: [time-nuts] GPS Jammer
Other than a terrorist, who would want to jam GPS?
Generic bad guys who don't want the FBI tracking them. The civil liberties
types are suing the FBI to make sure the get a court document before they
install GPS trackers on suspects cars.
Truckers who don't want
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