Patent ID: 8488417

Claim:
A time adjustment device comprising: a time information generating unit that generates time information containing internal time data and that outputs the generated time information; a reception unit that receives satellite signals transmitted sequentially from a positioning information satellite in subframes that comprise subframes 1 to 5 and that contain satellite-time-related information; an external input unit that generates, through manual operation of an external operating unit, command information that instructs the reception unit to enter a reception mode; a reception timing start setup unit that, when in the reception mode, sets the start time of reception by the reception unit so that at least one subframe is acquired at the time determined by the internal time data; and a corrected time information storage unit that stores the satellite-time-related information; wherein the reception unit comprises a determination unit that determines whether the satellite-time-related information received in a particular segment of one or more subframes is correct or erroneous, and if correct, is used as time adjustment information, wherein the generated time information is corrected based on the time adjustment information, if a correction amount is less than or equal to a prescribed threshold amount, and wherein, if the correction amount exceeds threshold amount, then the satellite-time-related information received in a subsequent subframe is stored, and if consistent, the generated time information is corrected based on the satellite-time-related information.