* These values should be continuous (no re-calibration should cause a jump).
* - 3 fields for hard iron bias estimates: x_bias, y_bias, z_bias.
* Each field is a component of the estimated hard iron calibration.
- * They represent the offsets to apply to the uncalibrated readings to obtain
- * calibrated readings (x_calibrated = x_uncalib + x_bias)
+ * They represent the offsets to apply to the calibrated readings to obtain
+ * uncalibrated readings (x_uncalib ~= x_calibrated + x_bias)
* These values are expected to jump as soon as the estimate of the hard iron
- * changes.
+ * changes, and they should be stable the rest of the time.
*
* If this sensor is present, then the corresponding
* SENSOR_TYPE_MAGNETIC_FIELD must be present and both must return the