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MOD GPS Jamming

Don’t know if anyone is aware of this but it looks like the GPS jamming exercises have started again here www.southgatearc.org/news/march2011/more_gps_jamming.htm

Not sure who might be affected but at least it is a ‘heads-up’ for that period

73s
Alan M0DDC

In reply to M0DDC:
I haven’t kept the emails from Ofcom, but I believe one exercise is up around N. Scottish coast the other stated Western Approaches, but I didn’t make a note of which!

I’ll try to remember to post the next ones here.

73 Graham G4FUJ
Just back from an 80 mile spin in the Morgan

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.


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.

In reply to G4FUJ:

Latest notice from Ofcom:

Dates and times: GPS jamming will take place according to the following schedule:

6 Apr 1400-1500Z

8 Apr 0200-0400Z
1000-1100Z
1330-1530Z
2000-2359Z
12 Apr 0800-1000Z
2200-2359Z

13 Apr 1400-1600Z
2100-2200Z

14 Apr 0100-0300Z
0800-0900Z

Location: GPS jamming will take place from Loch Ewe (N57° 51.9’ W005° 41.1’).

Peter
G1FOA

In reply to G4SXR:

Ofcom have announced they are withdrawing the GPS jamming exercise notice made on March 18.

Ofcom’s notice of a GPS jamming exercise sent on 18/03/2011 (Dates: 19 – 26 May 2011 Times: limited periods between 0700z 19 May to 1600z 2 May 2011) was issued in error and has been withdrawn.