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.
Wonder what the purpose was? If the locals only needed 32dB resistance and yet years ago we had well over 40dB resistance on military kit, then this is pretty low level stuff.
The New Scientist article was very interesting. Thanks for the link.