42 results about "Leap second" patented technology

A reception unit that receives a prescribed signal containing time information transmitted by a base station, a display time information adjustment unit that adjusts the time information displayed by a time information display unit based on the time information, a leap seconds information storage unit for storing leap seconds information that is time adjustment information based on rotation of the Earth and is contained in the time information, and a leap seconds application time information storage unit that stores leap seconds application time information for adjusting the displayed time information based on the leap seconds information. The display time information adjustment unit corrects the displayed time information based on the leap seconds information and the leap seconds application time information.

A novel and useful system and method for extracting timing, time and additional information from a broadcast received in a radio controlled clock (RCC) receiver. The RCC receiver extracts timing information represented by a known synchronization sequence that is used for acquisition and tracking purposes. The RCC receiver extracts time information as a merged 26-bit time information word linearly coded into 31 bits comprising the number of minutes (or hours) since the turn of the current century. A minute counter representing the 26 bits is converted into the date, hour, and minute. The RCC extracts additional information including the schedule for the next daylight saving time transition and for an imminent leap second. The communications protocol optionally employs error correcting codes to provide protection for data fields in the frame, which the RCC may use to enhance reception reliability in the presence of noise and interference.

An electronic timepiece can easily acquire a leap second information reception time with minimal processor load. A first table groups leap second information reception times expressed by hour, minute, second, and day values into plural minute-second patterns of minute-second combinations that are common to plural hours, and relates numbers identifying these minute-second patterns to the day and hour values. The minute-second combinations are grouped by number in a second table. The number corresponding to the day and hour of the internal time is found from the first table (S1). A minute-second combination that is later than the internal time is found from the minute-second combinations corresponding to the acquired number (S2). And leap second reception time is calculated. If the resulting leap second reception time matches the internal time is determined (S9). If the times match, the leap second information is received (S10, S11).

An electronic timepiece efficiently acquires leap second information, reduces power consumption, and enables displaying the correct time. A GPS wristwatch 1 has a satellite signal reception unit 10A that receives satellite signals, a power supply including a solar panel 70 and storage battery 60, a time information adjustment unit 25 that keeps time, a reception timing determination unit 24 that operates the satellite signal reception unit 10A, receives a satellite signal, and acquires leap second information contained in the satellite signal, and a reception determination unit 23 that detects the remaining capacity of the storage battery 60. When the remaining battery capacity measured by the reception determination unit 23 is greater than or equal to a specific value, the reception timing determination unit 24 sets the reception frequency for receiving a satellite signal higher than when the remaining battery capacity is less than the specific value.

A reception unit that receives a prescribed signal containing time information transmitted by a base station, a display time information adjustment unit that adjusts the time information displayed by a time information display unit based on the time information, a leap seconds information storage unit for storing leap seconds information that is time adjustment information based on rotation of the Earth and is contained in the time information, and a leap seconds application time information storage unit that stores leap seconds application time information for adjusting the displayed time information based on the leap seconds information. The display time information adjustment unit corrects the displayed time information based on the leap seconds information and the leap seconds application time information.

A method for use with a Global Navigation Satellite System (GNSS) receiver is provided. The method includes obtaining a first system time from a satellite of a first satellite navigation system, obtaining a second system time from a satellite of a second satellite navigation system, calculating a difference between the first system time and the second system time to obtain a number of leap seconds between Coordinated Universal Time (UTC) and the second satellite system.

A radio-controlled timepiece is shown including the following. A timekeeping unit keeps date and time. A date / time obtaining unit obtains date / time information from outside to correct the date and time of the timekeeping unit. A preliminary notice information obtaining unit obtains from outside preliminary notice information regarding whether leap second adjustment in which a leap second is inserted or deleted is executed. A date / time obtaining necessity setting unit sets whether the date / time information needs to be obtained based on history of obtaining the date / time information. The date / time obtaining necessity setting unit sets that the date / time information needs to be obtained when the preliminary notice information is not obtained by the adjustment possible date / time or the leap second adjustment is executed at the adjustment possible date / time, and does not change setting when the preliminary notice information is obtained and the leap second adjustment is not executed.

An electronic timepiece includes a display section, a display control section, a reception section, a clock section, a timing section, a leap second acquisition section, a time correction section that corrects internal time information by using time information acquired by the timing section, and a leap second correction section that corrects the internal time information by using leap second information acquired by the leap second acquisition section. In a case where the operation of the timing section is followed by the operation of the leap second acquisition section, the time correction section corrects the internal time information by using the time information acquired by the timing section, and the display control section causes the display section to display, before the leap second acquisition section acquires the leap second information, time based on the internal time information corrected by the time correction section.

An electronic timepiece can easily acquire a leap second information reception time with minimal processor load. A first table groups leap second information reception times expressed by hour, minute, second, and day values into plural minute-second patterns of minute-second combinations that are common to plural hours, and relates numbers identifying these minute-second patterns to the day and hour values. The minute-second combinations are grouped by number in a second table. The number corresponding to the day and hour of the internal time is found from the first table (S1). A minute-second combination that is later than the internal time is found from the minute-second combinations corresponding to the acquired number (S2). And leap second reception time is calculated. If the resulting leap second reception time matches the internal time is determined (S9). If the times match, the leap second information is received (S10, S11).

The invention discloses an integrated GPS and GLONAS positioning time service method. The method comprises steps of S1 present hour, minute and second determination; S2, leap second correction; and S3, previous circle overturning. Through the method, after a satellite of two systems is captured, in a resolution process, difference of a GPS and GLONASS system in a navigation message is utilized to realize mutual complementation, depth fusion is carried out, a mode of first resolution and then combination in the prior art is changed, performance of an integrated GPS and GLONAS receiver in the prior art is effectively improved, including reducing the first positioning time, improving time service precision and effectively processing special conditions such as leap second correction and thousand-circle overturning.

The invention discloses a time service time leap second processing method, which includes two processes: the input is atomic time and leap second forecast, the output is coordinated universal time, and the input is coordinated universal time and leap second forecast, and the output is atomic time. The present invention adopting the above-mentioned technical scheme provides the conversion from UTC to atomic time, and the conversion from atomic time to UTC. The two time system conversion methods ensure that the systems using UTC and atomic time can be synchronized and unified at the time when the leap second occurs. Avoid the impact of leap seconds on time synchronization and ensure the normal operation of the time synchronization system.

An electronic timepiece efficiently acquires leap second information, reduces power consumption, and enables displaying the correct time. A GPS wristwatch 1 has a satellite signal reception unit 10A that receives satellite signals, a power supply including a solar panel 70 and storage battery 60, a time information adjustment unit 25 that keeps time, a reception timing determination unit 24 that operates the satellite signal reception unit 10A, receives a satellite signal, and acquires leap second information contained in the satellite signal, and a reception determination unit 23 that detects the remaining capacity of the storage battery 60. When the remaining battery capacity measured by the reception determination unit 23 is greater than or equal to a specific value, the reception timing determination unit 24 sets the reception frequency for receiving a satellite signal higher than when the remaining battery capacity is less than the specific value.

Exposing a leap second to a plurality of applications includes identifying a system setting enabling leap second support and that a positive leap second should be added to the end of a chosen date. Based on the system setting enabling leap second support and based on the occurrence of the positive leap second, a first conversion component is exposed to a first application. The first conversion component presents, over a period of two seconds of actual time, a last second of the chosen date as if it is one second of system time. Based on the system setting enabling leap second support, based on the occurrence of the positive leap second, and based on a second application opting in to leap seconds, a second conversion component is exposed to the second application. The second conversion component presents an extra 61st second of system time at the end of a last minute of the chosen date.

A transmitting method of storing data that configures an application in a predetermined data unit and transmitting the predetermined data unit. The predetermined data unit includes generating time specification information indicating an operation time of the application, based on reference time information received from an external source. The transmitting method includes transmitting (i) the predetermined data unit and (ii) control information indicating the generated time specification information. The control information includes the generated time specification information and identification information indicating whether the time specification information is time information indicating a time that is before a leap second adjustment.

A radio-controlled timepiece is shown including the following. A timekeeping unit keeps date and time. A date / time obtaining unit obtains date / time information from outside to correct the date and time of the timekeeping unit. A preliminary notice information obtaining unit obtains from outside preliminary notice information regarding whether leap second adjustment in which a leap second is inserted or deleted is executed. A date / time obtaining necessity setting unit sets whether the date / time information needs to be obtained based on history of obtaining the date / time information. The date / time obtaining necessity setting unit sets that the date / time information needs to be obtained when the preliminary notice information is not obtained by the adjustment possible date / time or the leap second adjustment is executed at the adjustment possible date / time, and does not change setting when the preliminary notice information is obtained and the leap second adjustment is not executed.

A radio timepiece, including: a satellite radio wave receiver; a ground wave receiver; a memory; and a controller, wherein the controller performs area determination operation of determining whether a current position is located within a geographical range where the ground wave receiver is capable of acquiring notice information regarding implementation / non-implementation of the leap second adjustment, when the controller determines that the current position is located within the geographical range, the controller controls the ground wave receiver to acquire the notice information, the controller determines, with the notice information, whether the leap second adjustment is scheduled to be implemented at an implementation candidate timing of the leap second adjustment, and when the controller determines that the leap second adjustment is scheduled to be implemented, the controller changes the leap second correction information at or after the implementation candidate timing.

An electronic timepiece includes a display section, a display control section, a reception section, a clock section, a timing section, a leap second acquisition section, a time correction section that corrects internal time information by using time information acquired by the timing section, and a leap second correction section that corrects the internal time information by using leap second information acquired by the leap second acquisition section. Ina case where the operation of the timing section is followed by the operation of the leap second acquisition section, the time correction section corrects the internal time information by using the time information acquired by the timing section, and the display control section causes the display section to display, before the leap second acquisition section acquires the leap second information, time based on the internal time information corrected by the time correction section.

The invention discloses a clock leap second processing method and a system of the clock leap second processing. The clock leap second processing method includes that a leap second value is stored and is initially obtained by a receiver. When the system is under normal operating condition, universal time coordinated (UTC) time is obtained through the receiver in real time. Global position system (GPS) time is obtained according to high-stability constant-temperature oscillator fractional frequency in a timing mode. When the system is reset, the UTC time is obtained through the receiver in real time. The current UTC time pluses the leap second value to be as the GPS time. The GPS time is continued to be timed according to the high-stability constant-temperature oscillator fractional frequency. And the system gets in the normal operating condition. When the system is in the normal operating condition, interruption message of a notice of adjusting the leap second is received, the UTC time changes in a smooth transition mode, and a new leap second value of the interrupt message is written in the storage. According to the clock leap second processing method and the system of the clock leap second processing, a smooth transition of technical objective directive (TOD) message in the process of the leap second changing can be achieved, the time is totally identical to the time when the leap second is adjusted, jump second do the GPS time can not occur, stable and normal operation of the system in the process of the leap second being adjusted is guaranteed.