A honeycomb structure includes a plurality of honeycomb segments partitioned by partition walls and having a plurality of circulation holes penetrating in one axial direction; and a bonding layer existing between the adjacent honeycomb segments for bonding the plurality of honeycomb segments. In the present invention, a pilot signal of a satellite is checked to see if there is a phase reversal according to an accumulation of correction results of symbols of the received pilot signal with corresponding symbols of a known pilot sequence. The output transducer can transmit a corresponding output signal embodying separate channel data indicative of the substances received. The body of the cover is connected to the base such that the device is enclosed by the cover, and the electrically conductive lead includes an exposed portion that is electrically connected to the device. In each nondata region, every other nondata island in the along-the track direction has the same magnetization direction, with adjacent nondata islands having antiparallel magnetization directions. The second step also retains as an evaluated symbol length the corrected first-symbol length if the absolute value of the second random phase error reduces the condition of passing through the second state.