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Re: LF: Forthcoming GPS jamming exercises

To: <[email protected]>
Subject: Re: LF: Forthcoming GPS jamming exercises
From: "mal hamilton" <[email protected]>
Date: Fri, 10 Jul 2009 14:46:00 +0100
References: <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
We all know the reasons and under some circumstances justified, but so many
now rely on and depend on its existance that perhaps we have gone down the
wrong road. Just imagine if a major incident was about to take place and it
was jammed for prolonged peroids. So many agencies now depend on it and
consider it an essential navigation facility.
Of course it could also be jammed deliberately by hostile organisations
which is even worse than a controlled exercise.
Communications satellites are also vunerable to jamming and abuse and the
whole world communications network is virtually dependent on them with only
limited cable alternatives.
 I think we are in a right mess and more vunerable than before the advent
of such systems not to mention computer viruses and hackers etc.
All these gadgets and contraptions are very useful but the mistake is
totally DEPENDING on them which is the situation we are in.
G3KEV

----- Original Message ----- From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Friday, July 10, 2009 1:51 PM
Subject: Re: LF: Forthcoming GPS jamming exercises


Ask yourself why it may be advantageous to jam GPS is a war scenario,
and just how GPS is likely to be used by both sides.
Then consider how it may be done in a sensible manner, how to avoid
excessive fratricide and why excercises such as these may have to be
performed.

Ask yourself why Selective Availability was removed some years ago.

May like to also wonder if the substation located at exactly that
specified location could have anything to do with the exercise.

Andy  G4JNT
www.g4jnt.com



2009/7/10 Michael Probert GW4HXO <[email protected]>:
Hello Finbar,

Maybe Mal has a point? Seems a bit odd that the MOD are going to jam an
important service for a couple of hours. Can you imagine it they jammed TV
for a day or two, would be nice!

Best regards

Mike

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of mal hamilton
Sent: 10 July 2009 11:19
To: [email protected]
Subject: Re: LF: Forthcoming GPS jamming exercises

Like I said when the big BANG comes the Appliance operator and his data
gadgets will be rendered useless, whereas a Radio Amateur with his 2 valved
RX/TX, a morse key, a piece of wire for antenna and a pedal powered power
source will communicate on.
We all managed to commumicate and navigate this past 100 years without these
gadgets, unfortunately today the majority seem to be totally dependant on
computers and associated data devices. These gadgets are handy but make a
person LAZY and forgetful about how to write and operate CW as a tool to
communicate.
G3KEV

----- Original Message -----
From: "Dave Pick" <[email protected]>
To: <[email protected]>
Sent: Friday, July 10, 2009 8:11 AM
Subject: Re: LF: Forthcoming GPS jamming exercises


Perhaps we should encourage a Loran jamming excercise to prove that it
isn't the un-jammable marvel that its cracked up to be?

;-)

Dave G3YXM

2009/7/9 Dave G3WCB <[email protected]>:
Hmmm... I can only see an electricity substation at that exact
location...the source will probably on Henley's Down or somewhere similar.
It'll mess-up any GPS-disciplined beacons (LF or Microwave)for a few
hours!

73, Dave G3WCB IO91RM

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Andy Talbot
Sent: 08 July 2009 22:36
To: [email protected]; [email protected];
[email protected]
Subject: LF: Fwd: Fw: Ofcom Update: Date Correction - Forthcoming GPS
jamming exercises


The Lat/Long converts to:
Loc. JO00FV41
NGR TQ723122

Andy
www.g4jnt.com

--- On Wed, 8/7/09, Updates <[email protected]> wrote:

From: Updates <[email protected]>
Subject: Ofcom Update: Date Correction - Forthcoming GPS jamming exercises
To:
Date: Wednesday, 8 July, 2009, 11:14 AM

The MoD has informed Ofcom of the following GPS jamming exercise:

Dates: 14th and 15th October 2009.

Times: Maximum of two hours between the times of 08:00-12:00 and
13:30–15:30 each day.

Location: Within 1km of N50° 53.0’ and E000° 27.0’ (Bexhill, East Sussex).
Contact: Trial Manager (during the trial) on 07776 484226.


...........................................................................




--
G3YXM IO92BK Birmingham UK



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