Changes

* Three transmitter coils times three receiver coils, gives nine coil-coupling measurements. These can be performed sequentially, partially sequentially and partially simultaneously, or all simultaneously. Sequential measurements simplify the electronics, but impair dynamic accuracy: When the receiver is moving, sequential measurements result in inconsistent datasets, leading to position and orientation dynamic errors.

* Three transmitter coils times three receiver coils, gives nine coil-coupling measurements. These can be performed sequentially, partially sequentially and partially simultaneously, or all simultaneously. Sequential measurements simplify the electronics, but impair dynamic accuracy: When the receiver is moving, sequential measurements result in inconsistent datasets, leading to position and orientation dynamic errors.

* Receiver coil signals can be measured simultaneously or sequentially. Simultaneous measurements improve signal-to-noise ratio.

* Receiver coil signals can be measured simultaneously or sequentially. Simultaneous measurements improve signal-to-noise ratio.