GPS Jamming in July

ColdFusion

ColdFusion

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I've just received this from Ofcom:

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

Dates: Jamming will be conducted on a maximum of 3 week-days in the period 10-21 July 2011.Times: 0900 -1730 BST.

Location: Jamming aircraft will orbit at 10,000ft above mean sea-level (AMSL) along a 50nm flightpath on a heading of 270°T from Kirkwall, starting 10nm to the west of Kirkwall and ending 60nm to the west of Kirkwall

Possible areas affected: The GPS jamming is likely to affect civilian Standard Positioning Service (SPS) receivers over a large area. A minimum jammer to signal vulnerability of 30dB has been assumed for a civilian receiver. Signal theory suggests that a SPS civilian receiver should have approximately 32dB of jamming resistance.

Safety of Life Operations: Safety of life operations will take precedence over exercise activities at all times. To this end, the AWC is open to further discussion with any official recipient on the potential implications of this jamming exercise.

Contact point: During the exercise, any official recipient (or their delegated representative) and any member of the Emergency Services may terminate the jamming for safety reasons by calling the contact numbers below:

(1) Primary: Duty Controller Flying (TLT), RAF Kinloss - Tel: 01309 617857.

(2) Backup: Duty Controller Flying (TLT), RAF Lossiemouth - Tel: 01343 817428.

(3) Tertiary: Duty Air Surveillance Officer, National Air and Space Operations Centre – Tel: 01494 494812.
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ProDave said:
And who's flying the jaming aircraft, and why do they want to do this?
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Missile and weapon systems use GPS for tracking & targeting. How do you stop them ?
Jam the GPS for which I would think this is a trial.
Other trials will be taking place at the same time.
 
It won't be simple jamming - that's well understood - but will more likely be related to 'spoofing' and 'anti-spoofing'...

Wot's that? Well, it should provide 'alternative' solutions to the NavStar GPS space-segment signals ( what we get ), which would/should lead targeted receivers to resolve positions significantly displaced from reality, which would then feed those wrong positions to airborne/sea-launched weapons systems.

The intended result would be Russian air-launched nukes ( Bear, Backfire ) airbursting over Edinburgh instead of Glasgow ( or is it the other way round? ).... Should certainly liven up proceedings at Murreyfield and Ibrox! :eek:

'Anti-spoofing' is the technical means of preventing such interference with one's weapons' private parts.... the 21st Century military equivalent of carrying a set of Admiralty paper charts ( Leisure Series ) and some 2B pencils. Oh, and a nav to sort it all out.

I wouldn't worry about it. We all know the Russkies wouldn't harm a fly; it's all a scam to put fear into the populace and justify us spending money we don't have on weapons systems that will never be expected to work.

Now that's what Defence Procurement is for....!

:cool:
 
ColdFusion said:
But you weren't planning on using it as a primary source of navigation were you?
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In practice, although not by intent, that's what it has become for most of us.

You look at your charts, work out a passage plan and pencil in any waypoints needed, which then get input into the GPS. From then on, GPS positions are entered on the chart every now and then (time interval depends on length of passage/possible dangers etc) just in case the GPS goes down. The GPS is also used for steering info or to drive the autopilot.

When in sight of land, how many people take bearings to check GPS accuracy? I bet not many.
 
Even Chance said:
Just bloomin great!:mad:
I hope those arent the dates I'm planning on going over to Orkney.
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It's all line of sight in Orkney, there are bits of it that aren't surveyed, and the tide will wash you of the edge of the world, once you get to Stromness, stay there, it has a few good pus and the chippy on the high street is good. Hire a car to get around (the taxi office up the hill, just down from the good butcher), much easier than sailing :D
 
Aye Snooks, I know the place very well, and will hopefully get the wife to take the car over on the ferry to assist in travel.
Tides!!, you lot in the South dont know your living!
Going through the Flow to Stromness is the easier option, but I fancy going to Kirkwall and then on to the wee islands. Ive never been over to them before. Kirkwall is around 11 or 12 hours from Wick.
The wife aint so keen though, so it may just be myself..........
 
Even Chance said:
Kirkwall is around 11 or 12 hours from Wick.
The wife aint so keen though, so it may just be myself..........
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You can break it up going into Holm Sound for the night, get up the next morning, go for and ice cream and stock up on Strubarb from the Orkney Wine Company next to the Italian Chapel, then head the rest of the way round to Kirkwall. Breaks it up nicely.

Try to get to Papa Westray, moor at Pierowall, hire bikes and take them on the ferry to Papa Westray and head to Nap of Howar, like Skara Brae but you can walk around and in it

here was our day there http://yachtpixie.blogspot.com/2010/08/day-on-papay.html

There's a small Island to the East of Papa Westray, it looks like the back of a whale or submarine. if you go to the top apparently you can climb down into the burial chambers which are underground and around 60ft long apparently.
 
ColdFusion said:
But you weren't planning on using it as a primary source of navigation were you?
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Well of course he is - why else would he spend out loads of well earned beer tokens on it?

We all know the arguments, and most of us keep track of the info provided by GPS with a 3b, but how many of us verify GPS positioning independently and only use it as a back up in normal circumstances? Switch on GPS, write results down in log and plot on chart at regular intervals is the normal drill on every boat I sailed on in the last 15 years.
 
Further jamming exercises announced for May

Further jamming exercises announced for May in SW approches, S Wales and North Sea.

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

Dates: 19 – 26 May 2011.

Times: limited periods between 0700z 19 May to 100z 2 May 2011.

Location: The ground based radar jamming events will take place in the SW approaches against the remote radar head at Portreath 21-22 May, undertaken by F-18 Growler aircraft. Additionally there will be radar jamming against deployed targets in South West Wales throughout the period 19-26 May. Communications and airborne radar jamming will take place throughout the same period on the East Coast with aircraft operating within the North Sea Military Danger Areas. Communications and maritime unit radar jamming will take place in the SW approaches and Bristol Channel. Falcon aircraft will operate from Sea Level to FL240 unless jamming AEW aircraft where they may operate above FL245.

Contact: G R Pickett
Sqn Ldr
SO2 Air C2
JTEPS
Mil 9360 58786
Civ 01923 958786

Note: Safety of life operations will take precedence over exercise activities at all times.
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