GPS Jammimg Trials

[+The Wobbly Club]

There will be a GPS jamming trial taking place in June.

 

2 Dates, Times and Areas Affected

Date: 7/8 June 2007 inclusive.

Time: Between 0800 and 1600.

Location: Land based jammer within a 0.5 nm radius of 501612N 0051624W, near Portreath , North Cornwall

Predictions show that the areas affected will be as follows:

Note: EIRP - (Effective Isotropically-Radiated Power)

ERP - (Effective Radiated Power)

Omni directional 100mW EIRP jammer - 7/8 June, 2007 (inclusive)

At 25m agl – Land areas with clear line of sight of the transmitter.

– Sea areas to a maximum range of 6 nm from the transmitter.

Up to 30000 ft amsl - 6 nm from the transmitter site in all directions

These trials should not cause interference to other land based or airborne navigation or communication systems

[+Mr'D]

Huh? What are jamming trials about and who are jamming?

It's late...

[Edgemaster]

Just out of interest, what's the source of this news?

The centre seems to be here - http://www.geocaching.com/seek/gmnearest.a...p;lon=-005.1624

There's no caches nearby (within the 926m radius)

[+FollowMeChaps]

Huh? What are jamming trials about and who are jamming?

It's late...

 

I believe it's when a load of cacher's get together with musical instruments and sing badly! Is that an event?

[+HazelS]

Eeeeeeeeek - does that mean that when we have carry on camping in Devon that weekend we won't be able to find any caches?????????????

[+Stuey]

Eeeeeeeeek - does that mean that when we have carry on camping in Devon that weekend we won't be able to find any caches?????????????

 

If you want to use that excuse, that's up to you

[+Haggis Hunter]

Huh? What are jamming trials about and who are jamming?

It's late...

You have to remember that the equipment that we use is military based. When new jamming technology comes out it has to be tested. Waste of time waiting until it's to late to find out if it works?

 

Before GPS the main thing that the military was concerned in jamming was radio frequencies. As the military have primary control over all frequencies, they have always been able to carry out their tests without affecting the public sector. Sadly with GPS, we use the exact same technology & frequencies that they do, so when they have to do their tests we get affected.

 

There may be a total different reason for the jamming, but the military are the only organisation that I can think of that will have that sort of authority?

[+scottpa100]

Seeing other peoples comments shows the strength of argument for the European GPS system. I know the military could still jam the signal but the military couldn't switch the signal off because the signal is owned by the various EU states. For example the British military may want to switch it off for 'security reasons' but this would not fit in with, say, the German government. As the EU nations are all shareholders in the project helps balance the provision of the service. Unlike the American GPS (which we all currently use) and could be switched off at the flick of a switch because its owned and managed by own shareholder. The US Army.

[+tteggod trackers]

You should try using satnav or gps in Aldermaston area!Always jammed there, but then it is the UK Atomic Weapons Establishment! Aldermaston.There have been threads about this before i think.

[+Molinnis]

Well thats only 30 minutes drive down the coast from me, would be interesting to go for a walk along the coastpath to see how it affects the gps.

 

Closest cache is "Nice’ and Awesome Cache" GCG6KG which could be affected if approaching via the coastpath from the North.

[+Mr'D]

You should try using satnav or gps in Aldermaston area!Always jammed there, but then it is the UK Atomic Weapons Establishment! Aldermaston.There have been threads about this before i think.

Yes have a look here:

 

http://forums.Groundspeak.com/GC/index.php...;hl=aldermaston

 

Jon

[Edgemaster]

Disregard my last post here. Let me just readjust my above link, I had interpreted the given coords incorrectly (they should learn that spacing is important)

 

http://www.geocaching.com/seek/gmnearest.a...273333&mt=m

 

The cache noted does appear to be in the jammer's range.

Edited May 27, 2007 by Edgemaster

[+The Wobbly Club]

The source of this information is from the Civil Aviation Authority website www.ais.org.uk

[+The Klever Boys]

Also some info here:

http://news.bbc.co.uk/1/hi/england/cornwall/6719639.stm

[+drsolly]

They were using their jammer in the vicinity of Bicester today. They had it aimed directly at a railway tunnel I was inside, and the jammer worked great, I can tell you.

[Iwuzere]

Also reported here (based upon the BBC page)

http://www.southgatearc.org/news/june2007/...gps_jamming.htm

[+currykev]

Huh? What are jamming trials about and who are jamming?

It's late...

 

I believe it's when a load of cacher's get together with musical instruments and sing badly! Is that an event?

 

It'll be a miraculous event of Bob Marley sings!

[Iwuzere]

more info

http://www.theregister.com/2007/06/06/mod_...trial_cornwall/