Patent ID: 7457203

Claim:
A timepiece comprising: a reception unit that receives navigation data included in one of a plurality of GPS signals, each GPS signal including navigation data transmitted by a plurality of GPS satellites, respectively; a timekeeping unit that provides a current time and holds the current time as internal current time data; a storage unit that stores a plurality of items of identification information, each identifying a respective one the GPS satellites from which the navigation data was received, the plurality of items of identification data being stored in a corresponding relationship with a plurality of items of correction time data, respectively, each item of correction time data indicating a time when the internal current time should be corrected, and each item of correction time data being preset by a user; internal current time determining means for acquiring the internal current time data from the timekeeping unit and determining whether the acquired internal current time data matches one of the items of correction time data stored in the storage unit; GPS satellite selecting means for, responsive to a determination that the acquired internal current time data matches one of the items of correction time data stored in the storage unit, selecting a GPS satellite represented by the item of identification information stored in the storage unit in a corresponding relationship to said one of the items of correction time data; acquiring means for causing the reception unit to receive the navigation data from the GPS satellite selected by the GPS satellite selecting means, and for acquiring GPS time data included in the navigation data; correction means for correcting the internal current time data based on the GPS time data acquired by the acquiring means; and storage control means for storing, in the storage unit, identification information indicative of the GPS satellite, from which the navigation data was received by the reception unit, in correspondence to said one of the items of correction time data.