Patent ID: 7701390
Filing Date: 2010-04-20
Classification: G01S,G04R

Abstract:
1. A time adjustment device comprising: a reception unit that receives a satellite signal transmitted from a positioning information satellite; a time information generating unit that generates time information; a generated time information storage unit that stores the time information generated by the time information generating unit as generated time information; and a starting information generating unit that generates information before the beginning of a specific unit of the satellite signal that is transmitted in specific units from the positioning information satellite as before-starting information based on the generated time information; wherein the reception unit has the specific unit of the satellite signal is a frame information unit wherein multiple subframe information units containing at least the satellite time information constitute one frame information unit; the reception unit receives the satellite time information in the first subframe information unit; the first subframe information unit contains positioning information satellite health information denoting the condition of the positioning information satellite; the reception unit acquires the positioning information satellite health information when a specific time has passed since the last time the generated time information was corrected; and the time adjustment device further comprises a health evaluation unit that determines the condition of the positioning information satellite based on the positioning information satellite health information.