[ntp:questions] GPS Jammers in Use by Criminals - Warping Time for Fraud Suggested

David Woolley david at ex.djwhome.demon.invalid
Sat Feb 25 20:09:42 UTC 2012

Jason wrote:

> So, what would be a characteristic symptom or tell-tale of jamming?
Simple jamming, as used to defeat vehicle tracking, would result in the 
loss of all satellites.  Sophisticated jamming, to produce a false time, 
would, for its target, produce a slow drift in the time, with no alarms, 
although the signal strength would be higher than usual.  Receivers at 
the limits of jammer range might not be able to get consistent solutions 
across different satellite combinations, so might alarm for that, and 
otherwise might behave as for a simple jammer.

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