This link shows the size of mu-chips--the latest rfid tags:
http://images.google.com/images?hl=en&lr=&ie=ISO-8859-1&q=mu-chips&btnG=Search
and this link tells how the ability to read these chips is mounted on telephone poles:
http://thunderbay.indymedia.org/news/2004/04/13189.php
"The miniscule RFID tags are no larger than a matchstick and will be implanted subdermally, meaning under the skin. Data from RFID tracking stations mounted on telephone poles will be transmitted to police and social service workers, who will use custom Windows NT software to track movements of the homeless in real time."
Given this information, is it really taking it too far to imagine that the telephone poles can also transmit rfid information via satellites? This link sort of hints at how this is possible
http://yechoua.com/Digital%20Angel%20revu.gif
Informant: BETH