A navigation satellite system reception apparatus includes a navigation satellite signal reception unit that calculates a first reception position, and a control unit that calculates an initial value of the first reception position and an orbit position of each of four or more navigation satellites, calculates, based on the calculated first reception position, the calculated orbit position, and time information from the first navigation satellite signals, arrival time of each of the first navigation satellite signals, extracts, based on the calculated arrival time, a second navigation satellite signal, calculates, based on the extracted second navigation satellite signal, a second reception position, recursively performs, by using the calculated second reception position, a calculation process of the arrival time and an extraction process of the second navigation satellite signal, and performs, based on a second navigation satellite signal extracted at end of recursive processing, the positioning process or the time synchronization process.

A device having: one or more processors for determining an elapsed time since a correction of a calculated date and time; estimate a degree of deviation included in the calculated date and time, based on the elapsed time; and in response to estimating the degree of deviation to be equal to or smaller than a predetermined range, execute a method by which the one or more processors: generate an expected code sequence of a code sequence to be received from a satellite; control a satellite radio wave receiver to receive the code sequence; determine whether there is a match between the expected code sequence and the code sequence; in response to determining that there is a match, obtain a present date and time information represented by the expected code sequence; and correct the calculated date and time, based on the present date and time information obtained.

A device having: one or more processors for determining an elapsed time since a correction of a calculated date and time; estimate a degree of deviation included in the calculated date and time, based on the elapsed time; and in response to estimating the degree of deviation to be equal to or smaller than a predetermined range, execute a method by which the one or more processors: generate an expected code sequence of a code sequence to be received from a satellite; control a satellite radio wave receiver to receive the code sequence; determine whether there is a match between the expected code sequence and the code sequence; in response to determining that there is a match, obtain a present date and time information represented by the expected code sequence; and correct the calculated date and time, based on the present date and time information obtained.

An electronic device includes: a receiver that receives a satellite signal; and a time corrector that corrects an internal time. The receiver acquires time synchronization information and satellite time information by receiving the satellite signal, detects update timing of seconds on the basis of the time synchronization information, and executes output processing of outputting a synchronization signal, which indicates output timing, and reception side time information including time difference information, which indicates a time difference between the update timing of seconds and the output timing, and time information of hours, minutes, and seconds based on the satellite time information, before next update timing of seconds. The time corrector corrects the internal time on the basis of the synchronization signal and the reception side time information.

An electronic device includes: a receiver that receives a satellite signal; and a time corrector that corrects an internal time. The receiver acquires time synchronization information and satellite time information by receiving the satellite signal, detects update timing of seconds on the basis of the time synchronization information, and executes output processing of outputting a synchronization signal, which indicates output timing, and reception side time information including time difference information, which indicates a time difference between the update timing of seconds and the output timing, and time information of hours, minutes, and seconds based on the satellite time information, before next update timing of seconds. The time corrector corrects the internal time on the basis of the synchronization signal and the reception side time information.

A universal moon phase display device for a watch including a device that calculates or receives the date, that receives a geolocation signal, that calculates or receives a lunar calendar with the correlation between the date of the moon phase, that converts the day's moon phase into a first angular position of a first display member included in this device and which includes a representation of the normal moon, and that further determines the northern or southern hemisphere in which this device is located and controls the direction of rotation of first drive device included in this device in order to drive the first display member in opposite directions in the northern hemisphere and in the southern hemisphere.

A universal moon phase display device for a watch including a device that calculates or receives the date, that receives a geolocation signal, that calculates or receives a lunar calendar with the correlation between the date of the moon phase, that converts the day's moon phase into a first angular position of a first display member included in this device and which includes a representation of the normal moon, and that further determines the northern or southern hemisphere in which this device is located and controls the direction of rotation of first drive device included in this device in order to drive the first display member in opposite directions in the northern hemisphere and in the southern hemisphere.

A method (P1) for coding a solar time, called the initial solar time (Hs1), associated with a geographical location (Loc) and with a day (J1) of the year, wherein the method includes selecting SEL(Href, Nb1) a reference time (Href) and an initial number of bits (Nb1) as a function of the type of initial solar time (Hs), computing CALC(Nm1) a number of minutes (Nm1) separating the initial solar time (Hs1) and the reference time (Href), coding COD(Hs1) the number of minutes (Nm1) in the initial number of bits (Nb1).

A method (P1) for coding a solar time, called the initial solar time (Hs1), associated with a geographical location (Loc) and with a day (J1) of the year, wherein the method includes selecting SEL(Href, Nb1) a reference time (Href) and an initial number of bits (Nb1) as a function of the type of initial solar time (Hs), computing CALC(Nm1) a number of minutes (Nm1) separating the initial solar time (Hs1) and the reference time (Href), coding COD(Hs1) the number of minutes (Nm1) in the initial number of bits (Nb1).

A method (P1) for coding a solar time, called the initial solar time (Hs1), associated with a geographical location (Loc) and with a day (J1) of the year, wherein the method includes selecting SEL(Href, Nb1) a reference time (Href) and an initial number of bits (Nb1) as a function of the type of initial solar time (Hs), computing CALC(Nm1) a number of minutes (Nm1) separating the initial solar time (Hs1) and the reference time (Href), coding COD(Hs1) the number of minutes (Nm1) in the initial number of bits (Nb1).