The present methods and systems include aligning at least two sensors with
one or more known locations, selecting at least two of the at least two
sensors, electrically driving the probe, based on signals received by the
selected sensors, determining whether the probe is aligned with the known
location(s), and, optionally adjusting the probe position based on the
determination. The methods and systems also include repeatedly returning
to electrically driving and positioning the probe until the probe is
aligned with the selected sensors, and/or repeatedly returning to
selecting at least two of the at least two sensors. The relative position
of the probe with respect to the selected sensors may also be determined.