Patent ID: 7812763
Filing Date: 2010-10-12
Classification: G01S,G04R

Abstract:
1. A time adjustment device comprising: a reception unit having a plurality of reception channels that receive and process satellite signals containing satellite time information measured by positioning information satellites; a time information generating unit that generates internal time information; a time information adjustment unit that adjusts the internal time information; a signal level acquisition unit that detects the signal level of each received satellite signal, wherein, if the detected signal level of a satellite signal is at or above a second level, the signal level acquisition unit discontinues its detection operation and allocates the corresponding positioning information satellite to one of the plurality of reception channels, if the detected signal level of a satellite signal is below the second level and at or above a first level, lower than the second level, the signal level acquisition unit allocates the corresponding positioning information satellite to one of the plurality of reception channels and continues its detection operation until a satellite signal at or above the second level is detected; a reception satellite selection unit that selects a positioning information satellite based on the detected signal levels of the positioning information satellites; a satellite time information acquisition unit that receives the satellite signal transmitted from the positioning information satellite selected by the reception satellite selection unit, and acquires the corresponding satellite time information; wherein the time information adjustment unit adjusts the internal time information based on the satellite time information acquired by the satellite time information acquisition unit.