GPS

I'm sure I'm labouring under a few incorrect 
impressions, so someone around here who is in 
the know can clear things up:

1) Has not GPS (civilian side) been given up to 
some sort of open system? (If so, wouldn't 
futzing up parts of it be problematic?)

2) Can differential GPS (multi-receiver) defeat or 
significantly attenuate the futzing up signal? 
(That is, can't differential GPS be used in such a 
way as to amerliorate the effects of signal 
uncertainty introduction)? If so, the only 
receivers that will be seriously futzed by the 
fuzz that can be inserted (fuzz substituting for 
any real technical understanding....) would be 
the non-differential single receiver GPSes, 
correct? (And yes, these are the more common 
variety IIRC)

3. If the US (or anyone) were to fuzz up a 
signal coming from someplace and this caused 
some manner of disaster (air crash, ship to run 
aground and sink, etc), wouldn't that be a very 
bad thing? (Yes, I know secondary navigation 
methods are meant to verify positions, but 
people ARE becoming GPS dependent).  I 
realize when weighed against a large scale 
offensive, these risks are minimal, however I can 
see someone attempting some form of 
litigation... (Land of the Free, Home of the 
Lawyer)

Thanks for any clarification or any correction. 

Tomb.
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Thomas Barclay
Co-Creator of http://www.stargrunt.ca 
Stargrunt II and Dirtside II game site

No Battle Plan Survives Contact With Dice.
-- Mark 'Indy' Kochte
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