A magnetic disk device having a magnetic disk, a magnetic head slider with a magnetic head mounted thereon and having a first surface, a second surface, a third surface and a fourth surface which are formed sequentially from an adjacent side to the magnetic disk, and a gap of a magnetic head arranged on the first surface. The system and method includes receiving, at a terminal, satellite positioning data for at least one specified time period over a communications channel. The second RF receiver section is coupled to receive the inbound RF signal and to provide a second representation of the inbound RF signal. The vertical transistor may comprise sequentially formed doped polysilicon layers or doped epitaxial layers.