44 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.

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 time adjustment device can acquire time information in a short time, reduce power consumption, and display the correct time. A GPS wristwatch has a reception unit that receives satellite signals; a time information generating unit that generates internal time information; a reception control unit that controls the reception unit; and a time information adjustment unit that adjusts the internal time information. The time information adjustment unit has a first information time adjustment means that receives first information containing year, month, day, hour, minute, second, and satellite health information, and adjusts the internal time information; a second information time adjustment means that receives second information including leap second information, and adjusts the internal time information; a third information time adjustment means that receives third information of hour, minute, second information, and adjusts the internal time information.

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 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).

A time information generating unit generates absolute time information synchronized with absolute time information acquired from an external source. The time information generating unit generates time information by shifting, to shifted time, occurrence time of a leap second that can be represented by the absolute time information acquired from the external source. A transmission unit transmits a signal including transmission media and the absolute time information generated by the time information generating unit. Thereby, influence on a reception side by occurrence of a leap second is suppressed.

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.

The invention discloses an IRIG-B-based time and frequency synchronization state information coding format and coding method. Through regulating and improving an IRIG-B coding method and redefining partial bytes of an IRIG-B code element, the time synchronization state information transmission can be realized, the problem that an existing IRIG-B coding method cannot transmit some key time synchronization state information is solved, and accordingly each node in a time synchronization network can monitor leap seconds, time service sources, time quality and frequency quality.

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.

A method for adding Time Marker Packets, TMPs, comprising Metadata to an MPEG-2 transport stream transmitted via a broadcast network for providing a deterministic transport stream, comprising providing feeds of data from at least one source, where the feeds comprise payload packets being referenced by a common 1 PPS reference, and where the feeds are input to at least one multiplexer, MUX; providing Time Marker Packets, TMPs, as input to each multiplexer, where each TMP comprises a plurality of time stamps per second measured relative to said 1 PPS reference, and each TMP has a value representing an Absolute Program Clock Reference, APCR, at the time of transmission, where the APCR is based on the Epoch time, and where the TMP packet further comprises PCR, OPCR locked to said 1 PPS and UTC leap seconds. The invention is further defined by a device for executing said method, as well as a method for coding a deterministic transport stream in a Single Frequency Network, SFN, and a device for executing this method.

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 provides a leap second jumping processing method and device. The method comprises the following steps: detecting a leap second jumping event; and when the leap second jumping event is detected, carrying out leap second jumping by a node in a delayed HOLDOVER state according to the compensation information in a historical buffer. By adopting the leap second jumping processing method and device provided by the invention, the problem in the prior art that the accuracy of the time synchronization of an overall network cannot be improved is solved, and thus an effect of improving the accuracy of the time synchronization of the overall network is achieved.

The invention relates of an intelligent test system and a method used for IRIG (Inter-range Instrumentation Group)-B code fault-tolerant functions of a time synchronizer. The intelligent test system comprises a management machine and an IRIG-B code test device, wherein the managing machine is used for running test, analysis and management programs, and the IRIG-B code test device is connected with the management machine by a communication link to realize program control. The intelligent test system is characterized by being provided with an intelligent time frequency signal switcher, the program control of the management machine is realized by the test, analysis and management programs in the management machine, and the switching of the program control is carried out by the intelligent time frequency signal switcher. The intelligent test system is used for testing an IRIG-B code precision recognizing function, an IRIG-B code leap second processing function, and a IRIG-B code leap yearprocessing function. Under the condition of no manual intervention, the intelligent test system and the test method can easily and effectively carry out an intelligent test on the IRIG-B code fault-tolerant function and performance of the time synchronizer, and actually enhance the intelligent level of testing the complex functions and the performance of the time synchronizer. The test performance is accurate, the test efficiency is high, and the test time is greatly shortened.

A transmitting method of storing data configuring an application into a predetermined data unit and transmitting the stored data in the predetermined data unit, which includes: generating time specification information indicating an operation time of the application, based on reference time information received from an external source; and transmitting (i) the predetermined data unit and (ii) control information indicating the generated time specification information, wherein the control information includes the generated time specification information and identification information indicating whether or not the time specification information is time information indicating a time that is before a leap second adjustment.

The invention provides a no-leap second timer, namely an O.A. clock which is a 24-solar-term accurate constant value designed according to the present astronomical theory, and therefore, the O.A. clock can synchronize international time. The O.A. clock leads all global standard systems to finally have accurate time evidences, thoroughly avoids the trouble of leap second supplement in all former calendars and can accurately run for one hundred and eight thousand years under an energy holding state. The O.A. clock can be produced by adopting the traditional mechanical-clock technology or adopting a design procedure of an electronic clock, and the O.A. clock can not be replaced by any clocks in the past in aviation, navigation, space operation, international information networks, global scientific researches, and the like, thereby a clock which is manufactured now not only has a timing function of the conventional clock, but also has a special function of recording calendars.