[extropy-chat] PRIVACY: GPS darts

[Dan Clemmensen]

Mike Lorrey wrote:

>http://www.jojo-automasjon.no/eng/index.html
>Look at the photo at the bottom of the page. Diameter of a matchstick.
>
>http://www.secureorderprocess.com/ti/product_detail.asp?product_id=58
>Displays 23 and 32 mm long transponders which appear to be about 3mm
>dia.
>
>http://www.globalchange.com/skinchip.htm
>
>Moore's Law says 1-1.5 mm dia in a year or so. .5-.75mm after that,
>whereupon they will be injectable by gun with minor discomfort for the
>recipient, that is, assuming the PTB don't already have them,
>considering that these are all out on the open market.
>
>  
>
Moore's law describes transistor sizes. Radio waves stay the same size. 
The size
of the radio wave constrains the size of the antenna. Shorter radio 
waves are
possible, but GPS does not use than and they do not penetrate materials 
well.

The devices you found are RFID transponders. They cannot receive GPS, 
and they
cannot operate over more than a few feet. They are unrelated to the fish 
transponder
you mentioned earlier, which had a range of 100' and a 4cm antenna.