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I should think that there is a lot of government df surveillance in use. If u are intrested read the code book by simon singh. It details much of the allied df system in use in world war 2. I dare say it has improved greatly since then since i hear there are by amateur astronomer count more than 13000 satellites in orbit and half that with known function it leaves a lot of room for spy satellites in speculation. Since it only takes ten watts to contact a bird it wouldn't be hard to imagine a network of them logging transmission strengths like the gps system. Also read up on project echelon on wikipedia. I think i saw an article on wired.com ages ago that was well researched. But that said I dont think the government cares whether people curse at each other over radio or not.

[QUOTE="fodendaf, post: 316864, member: 9594"] I should think that there is a lot of government df surveillance in use. If u are intrested read the code book by simon singh. It details much of the allied df system in use in world war 2. I dare say it has improved greatly since then since i hear there are by amateur astronomer count more than 13000 satellites in orbit and half that with known function it leaves a lot of room for spy satellites in speculation. Since it only takes ten watts to contact a bird it wouldn't be hard to imagine a network of them logging transmission strengths like the gps system. Also read up on project echelon on wikipedia. I think i saw an article on wired.com ages ago that was well researched. But that said I dont think the government cares whether people curse at each other over radio or not. [/QUOTE]

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