GPS by GSM Cellphone Detection

Dear all,

I would like to explian more since “GPS by GSM Cellphone Detection”
explain itself.

Recieving (Detecting, locating) individual GSM cellphones handshakes
BTS by at least (two antennas) to get cellphones positions (x,y) and
pass it
to a map to display the cellphones positions.

Its like but with more flexibility.

For public transportation it would require wider area.

For law enforcement it would be mobile.

Thank you.