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Post by antoniadodge on Sept 19, 2007 8:38:05 GMT -9
For those that keep up on this sort of thing, I just received this e-mail at work: The White House President George W. Bush
For Immediate Release Office of the Press Secretary September 18, 2007
Statement by the Press Secretary
Today, the President accepted the recommendation of the Department of Defense to end procurement of Global Positioning System (GPS) satellites that have the capability to intentionally degrade the accuracy of civil signals. This decision reflects the United States strong commitment to users of GPS that this free global utility can be counted on to support peaceful civil activities around the world.
This degradation capability, known as Selective Availability (SA), will no longer be present in GPS III satellites. Although the United States stopped the intentional degradation of GPS satellite signals in May 2000, this new action will result in the removal of SA capabilities, thereby eliminating a source of uncertainty in GPS performance that has been of concern to civil GPS users worldwide.
GPS benefits users around the world in many different ways, including aviation, road, marine and rail navigation, telecommunications, emergency response, resource exploration, mining and construction, financial transactions, and many more. All users, and their governments, have a stake in the future of GPS. The United States promotes international cooperation in the operation of civil global navigation satellite systems and continues to work to build international support for the protection of these signals from intentional interference and disruption.I heard that when the L5's launch (which Alaska will have availability to) they won't even HAVE a Y Code (which is encrypted P Code). I'm sure the military have something else up their sleeve, but it's still good news for GPS users. Just FYI.
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Post by NorthWes on Sept 19, 2007 12:09:03 GMT -9
This confirms what I saw in a 'briefing paper' email this morning from the Air Force Assn regarding the termination of 'selective availability' capability in new GPS satellites, for the very same reasons stated in the press release. Other 'briefings' I've read hint at the military's new solution - equipping certain elements of the growing fleet of remotely-piloted vehicles (RPVs) with stand-off jamming capability in the same spectrum that the GPS sats communicate across. The jammers would be focused towards their targets and assumably wouldn't adversely impact signal reception for 'friendly' users.
There's always a way to skin the 'signal jamming' cat. The Chinese have demonstrated their version of imposing 'selective availability' on a satellite - in an irreversible way!
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Post by antoniadodge on Sept 19, 2007 16:03:20 GMT -9
The Chinese have demonstrated their version of imposing 'selective availability' on a satellite - in an irreversible way! And an unnerving way.
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AKEMT
Bronze Cacher
Posts: 22
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Post by AKEMT on Oct 8, 2007 5:49:27 GMT -9
New military survival radio's have GPs built in and the ability to burst send locations, so we have had training on how to deal with local jammming to keep from being picked up by friendly forces.
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Post by antoniadodge on Oct 8, 2007 22:45:25 GMT -9
New military survival radio's have GPs built in and the ability to burst send locations, so we have had training on how to deal with local jammming to keep from being picked up by friendly forces. Cool. What are you guys using?
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