A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal and forwards the data to a processor, which calculates the position. R1, R2, and R3 are independent of each other and are each a functional group having at least one of carbon, hydrogen, oxygen, and nitrogen. The pusher includes a rotary dial disposed in a slot on the pusher adjacent to the armature. After a tunneling dielectric layer is formed on the bottom of the opening, a floating gate is formed on the sidewall of the opening.