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2004-12-16 Home Front: WoT

Plans to shut down GPS system in case of terror attack

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Posted by Dar 2004-12-16 12:06:48 PM|| || Front Page|| [1 views since 2007-05-07] Top

#1 "What does this mean, '10 East, San Bernardino, next right??' Oh no, we're lost!!! Totally, totally lost!!!!

Posted by Bomb-a-rama 2004-12-16 12:31:54 PM|| 2004-12-16 12:31:54 PM|| Front Page Top

#2 Selective availability was designed to degrade accuracy, not deny use, to civilians -- or to the missiles etc. of hostiles.

While Clinton took political credit w/ Euros for turning it off, the real issue is the prevalence now of earth-stationed pseudosatellites which allow a much more accurate position calculation (differential GPS) even if selective availabiility were turned on. That's made more true by advances in electronics and software techniques which are buried in GPS receivers, which use adaptive Kalman filtering to converge location estimates from varying satellite signals.

Bush is saying that if an attack happens, only the military bands of the GPS constellation will remain on -- and that pseudosatellites WILL be shut down.

The interesting phrase here is "simialr systems operated by others"....

Posted by rkb 2004-12-16 12:32:23 PM|| 2004-12-16 12:32:23 PM|| Front Page Top

#3 Well, 'similar' anyway ... can't spell worth a damn right after lunch ....

Posted by rkb 2004-12-16 12:33:25 PM|| 2004-12-16 12:33:25 PM|| Front Page Top

#4 Yep. That Bush. Such a cowboy. And dumb as a box of rocks to boot.

Posted by Seafarious 2004-12-16 12:49:28 PM|| 2004-12-16 12:49:28 PM|| Front Page Top

#5 Oh, MAN don't even get me started on Selective Availiblity again. If Bill Clinton came up to me, I'd shake his hand for turning that off. That one act justified everything he ever did in office.

Posted by gromky 2004-12-16 9:06:15 PM|| 2004-12-16 9:06:15 PM|| Front Page Top

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