I have been notified of two separate military exercises which will
involve GPS jamming. The first is a deliberate GPS jamming exercise
which being from a airborne source will affect ground based GPS. The
second is a more general radar and communication jamming exercise and
should have less effect on ground-based GPS.
Exercise 1:
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.
Exercise 2:
Dates: 19 – 26 May 2011.
Times: limited periods between 0700z 19 May to 100z 26 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.
--
Cheers, Chris
user: chillly
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