CN102354101A - Time service method and device using navigational satellite - Google Patents
Time service method and device using navigational satellite Download PDFInfo
- Publication number
- CN102354101A CN102354101A CN2011102360807A CN201110236080A CN102354101A CN 102354101 A CN102354101 A CN 102354101A CN 2011102360807 A CN2011102360807 A CN 2011102360807A CN 201110236080 A CN201110236080 A CN 201110236080A CN 102354101 A CN102354101 A CN 102354101A
- Authority
- CN
- China
- Prior art keywords
- time
- time service
- satellite
- hour minute
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Electric Clocks (AREA)
Abstract
The invention discloses a time service method using a navigational satellite, which comprises the steps of: starting a time service synchronous operation by a system; firstly acquiring sending time Ti of a navigation message, and synchronizing the current time to hour, minute and second information obtained from the Ti by the system. By adopting the time service method and device, the synchronization time is shortened and the power consumption of a time service receiver is reduced. The invention is suitable for multiple kinds of satellite navigation systems, such as GPS, Big Dipper one-generation navigation satellite, Big Dipper second-generation navigation satellite, GLONASS (Global Navigation Satellite System), GALILEO and other satellite navigation systems. In addition, the invention is also suitable for dual-mode/multi-mode satellite navigation systems and dual-mode/multi-mode hybrid satellite navigation systems.
Description
Technical field
The present invention relates to a kind of time service method and device that utilizes Navsat.
Background technology
Existing method of carrying out time service based on Navsat all is Timing Receiver through the acquisition and tracking satellite and demodulates the transmitting time of the navigation message of Navsat, the navigational system working time of Navsat, obtains universal time corrected parameter UTCp and distance and then the conversion navigation signal propagation delay time calculated between satellite and the receiver are carried out time synchronized.The transmitting time that receiver receives satellite navigation message can parse Hour Minute Second information, and the navigational system that receives Navsat can parse date information after working time.Just export the time service time after general Timing Receiver explains these two information, export with the form that Hour Minute Second, date export during information of same.But Hour Minute Second information is different with the position of date information in the Frame of navigation message, and both are not that demodulation is simultaneously come out.Therefore the needed time of time service longer relatively, but when requiring relatively strictness and power consumption strict to the time service required time, existing time service method can not meet the demands.For example, portable time service equipment such as satellite time service wrist-watch, these all belong to the highstrung equipment of power consumption.But to obtaining the time synchronized required time strict requirement is arranged for reducing power consumption, existing time service method is difficult to satisfy its requirement to time service time and low-power consumption.
Summary of the invention
The objective of the invention is the purpose of this invention is to provide a kind of time service lock in time of can shortening, reduce the time service method and the device of power consumption.
The present invention is achieved in that a kind of time service method that utilizes Navsat, and said method comprises, system start-up time service synchronous operation; At first obtain the transmitting time T1 of navigation message; The system synchronization current time is to the Hour Minute Second information that is obtained by T1.
Further, said method comprises that also the said Hour Minute Second information that is obtained by T1 is T2, wherein, and T2=T1+Tc, Tc=(maximum transmission time to ground+minimum transmission time)/2 to ground.
Further, said method also comprises, obtains the running time T 3 of navigational system from navigation message, and the system synchronization current time is to T3.
Further, said method also comprises, obtains UTC corrected parameter UTCp from navigation message, according to the UTC corrected parameter that obtains the said time service Hour Minute Second date information of obtaining is revised, and the system synchronization current time is to this time through revising.
Further, said method also comprises, the said setting according to user or system synchronously accomplished.
Further, said navigational satellite system is the Big Dipper two generations Navsat, GLONASS, GALILEO satellite navigation system or dual-mode/multi-mode satellite navigation system.
The present invention also provides a kind of time service device that utilizes above-mentioned time service method.
Further, said time service device is the time service wrist-watch.
The present invention also provides a kind of time service module, and said time service module comprises IO interface, baseband processing unit; Said baseband processing unit comprises the time synchronizing unit, and said time synchronizing unit is selected according to the time service of carrying out Different Strategies according to system's setting, and said IO interface is exported back output: $GPRMC after receiving Hour Minute Second information; Hhmmss, A;,, N*hh; After $GPRMC after receiving date information, hhmmss, A,,,,,,, ddmmyy,,, N*hh; Wherein hhmmss represents Hour Minute Second, and ddmmyy represents day month year, hh be verification with.
Adopt this time service method and device to shorten lock in time, save the power consumption of Timing Receiver.For the portable time service equipment such as satellite time service wrist-watch of sensitive power consumption, this time service method and device, the service time that the battery of same capacity can improve device battery.And under the prerequisite of same service time, can reduce the capacity of battery, and also just reduced volume of battery accordingly, help doing portable time service equipment such as time service wrist-watch littler.
Description of drawings
Fig. 1 is a kind of Navsat time service device system diagram;
Fig. 2 is a software processes process flow diagram of the present invention;
Fig. 3 is the longest and short transmission path of a navigation signal synoptic diagram.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The satellite Timing Receiver comes to the user to be provided the time service time through temporal information in the reception navigation message.The navigation message frame format of each satellite system is all inequality; But their navigation message the inside has comprised TOW (Time Of Week basically; Second in week); WN (Week Number, complete cycle number), UTC (Universal Coordinated Time; UTC Universal Time Coordinated) information such as corrected parameter; The frequency that TOW occurs is the highest, WN secondly, the UTC corrected parameter occurs minimum, the slowest.Such as the text of GPS, one page navigation message is made up of five sub-frame, and each subframe is made up of 10 words.The transmitting time TOW that navigation message is all arranged in preceding two words of all subframes, and WN working time of navigational system only is positioned at navigation message subframe 1, UTCp is positioned at the 25th page of subframe 5, receives TOW and the shortest the difference 0 second of the time of receiving WN, the longest difference 24 seconds.And receive UTCp, length needs 12.5 minutes.Timing Receiver is exported Hour Minute Second and date information and just can be made the user 24 second time obtained the time service time and carries out time synchronized in advance with regard to exporting Hour Minute Second information immediately after receiving TOW than after receiving WN like this.Receive that in like manner the method for just exporting Hour Minute Second information behind the TOW just exports the method for Hour Minute Second date information and will shift to an earlier date 12.5 minutes and obtain the time service time and carry out synchronously than after receiving UTCp.
Fig. 1 is a kind of Navsat time service device system diagram.Antenna 101 receives satellite-signal; Radio-frequency front-end 102 demodulates intermediate-freuqncy signal and delivers to baseband processing unit 111 under crystal oscillator 103 effects; Comprising catching path 10 6, tracing channel 107, the temporal information that obtains according to demodulation of time synchronizing unit 104 is carried out time service output then.Catch path 10 6 and comprise that N1 is caught passage, tracing channel 107 has comprised N2 tracing channel.Base-Band Processing part 111 also comprises flush bonding processor 109; Reseting module 105; In addition, also has power interface 108, IO interface 110; Wherein power interface 108 is used to obtain outside power supply; And being the radio-frequency front-end power supply, IO interface 110 is used for external output data, and is used for synchronous PPS (pulses per second; And the renewal of self control program pulse per second (PPS)).Main control microprocessor 112 is used to receive the data from signal processing unit 111, and sends related data or steering order is given signal processing unit 111, and control time synchronous processing unit 104 is carried out the time service of Different Strategies and selected according to system's setting.The generation of the demonstration of control time information, user interface simultaneously with mutual, or the like.System program storer 116 is used for storage control program, and FLASH storer 117 is used for storaging user data.Power supply 113 is for total system provides electric power, and power supply detects electric weight and the electrical power distribution that control module 114 is used to detect power supply and gives signal processing unit 111.
Fig. 2 is a software processes process flow diagram of the present invention.Step 201 expression Timing Receiver acquisition and tracking Navsat.Step 202 expression receiver obtains the transmitting time T1 (second in week) of navigation message.Step 203 expression is through being synchronized to local zone time T2 to the signal transmission delay of estimation; T2=T1+Tc; Wherein, Tc is to text travel-time that ground distance is estimated according to the height of satellite orbit; Owing to there is not receiver location information; Can't calculate navigation message travel-time Tc accurately, this method is estimated text travel-time Tc=(maximum transmission time to the ground+minimum transmission time to ground)/2 according to the height of dissimilar satellite orbits to the difference of ground distance.
Fig. 3 is the longest and short transmission path of a navigation signal synoptic diagram.Because Navsat is known to ground level, thus the longest and short transmission path of navigation signal just can calculate, and the longest and short transmission path of navigation signal just corresponding to the ground maximum transmission time and to minimum transmission time.By finding out among Fig. 3: the poor＜=earth radius (about 6380km) in longer transmission path 302 of navigation signal and short transmission path 301; Therefore the time service error＜=22ms (earth radius/light velocity) that causes by Tc.
Timing Receiver is in step 204 output Hour Minute Second information, in step 206 output Hour Minute Second, date information, in step 208 output adjusted Hour Minute Second date information.If the GPS Timing Receiver, time service equipment carries out time synchronized in step 204 and can shift to an earlier date maximum 24 seconds than carry out time synchronized in step 206 so, shifts to an earlier date maximum 12.5 minutes than carry out time synchronized in step 208.
In addition, for the time dissemination system of some low precision, the Hour Minute Second information of its output can not considered transmission delay Tc and the transmitting time T1 of the navigation message that direct output is obtained.
This time service method mainly is NMEA (the National Marine Electronics Association with time service output; American National ocean Institution of Electronics) the time service RMC statement in the statement splits; NMEA0183 V2.0 agreement deferred in the RMC statement;, just export at once Hour Minute Second, bu sequencing output on days with user-defined form as long as Timing Receiver obtains being used for synchronous Hour Minute Second information.For example:
$GPRMC, hhmmss, A,,,,,,,,,, N*hh, (exporting after receiving Hour Minute Second information)
$GPRMC,hhmmss,A,,,,,,,ddmmyy,,,N*hh。(exporting after receiving date information)
Hhmmss represents Hour Minute Second, and ddmmyy represents day month year, hh be verification with.
For portable time service equipment such as time service wrist-watch, date information is not need often to upgrade, but can be a lot of to the synchronization times of Hour Minute Second.The Hour Minute Second date information of time service NMEA statement is split into two kinds of form outputs, can shorten lock in time like this, save the power consumption of portable time service equipment such as time service wrist-watch.
The present invention is applicable to multiple satellite navigation system, as: satellite navigation systems such as GPS, Big Dipper generation Navsat, the Big Dipper two generations Navsat, GLONASS, GALILEO.In addition, the present invention also is fit to dual-mode/multi-mode satellite navigation system and dual-mode/multi-mode mixed satellite navigational system.For the transmitting time T1 of navigation message, transmitting time is expressed as second (TOW) in week, T1=TOW in GPS, COMPASS, GALILEO system; Transmitting time is expressed as second (TOD) in the sky, T1=TOD in the GLONASS system.For navigational system running time T 3, system operation time is expressed as complete cycle number (WN) in GPS, COMPASS, GALILEO system, T3=WN * 604800 second; System operation time is expressed as fate (DN) in the GLONASS system, T3=DN * 86400 second.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a time service method that utilizes Navsat is characterized in that, said method comprises,
System start-up time service synchronous operation;
At first obtain the transmitting time T1 of navigation message;
The system synchronization current time is to the Hour Minute Second information that is obtained by T1.
2. time service method according to claim 1 is characterized in that said method comprises that also the said Hour Minute Second information that is obtained by T1 is T2, wherein, and T2=T1+Tc, Tc=(maximum transmission time to ground+minimum transmission time)/2 to ground.
3. like time service method as described in the claim 2, it is characterized in that said method also comprises, obtain the running time T 3 of navigational system from navigation message, the system synchronization current time is to T3.
4. like time service method as described in the claim 3; It is characterized in that; Said method also comprises; Obtain UTC corrected parameter UTCp from navigation message; According to the UTC corrected parameter that obtains the said time service Hour Minute Second date information of obtaining is revised, the system synchronization current time is to this time through revising.
5. like any described time service method in the claim 1 to 4, it is characterized in that said method also comprises, the said setting according to user or system synchronously accomplished.
6. time service method as claimed in claim 5 is characterized in that, said navigational satellite system is the Big Dipper two generations Navsat, GLONASS, GALILEO satellite navigation system or dual-mode/multi-mode satellite navigation system.
7. time service device that utilizes the said time service method of claim 1.
8. time service device as claimed in claim 7 is characterized in that, said time service device is the time service wrist-watch.
9. time service module that is used for the said time service device of claim 7; Said time service module comprises IO interface (110); Baseband processing unit (111) is characterized in that, said baseband processing unit (111) comprises time synchronizing unit (104); Said time synchronizing unit (104) is selected according to the time service of carrying out Different Strategies according to system's setting; Said IO interface (110) is exported back output: $GPRMC, hhmmss, A after receiving Hour Minute Second information;, N*hh; After $GPRMC after receiving date information, hhmmss, A,,,,,,, ddmmyy,,, N*hh; Wherein hhmmss represents Hour Minute Second, and ddmmyy represents day month year, hh be verification with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102360807A CN102354101A (en) | 2011-08-17 | 2011-08-17 | Time service method and device using navigational satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102360807A CN102354101A (en) | 2011-08-17 | 2011-08-17 | Time service method and device using navigational satellite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102354101A true CN102354101A (en) | 2012-02-15 |
Family
ID=45577680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102360807A Pending CN102354101A (en) | 2011-08-17 | 2011-08-17 | Time service method and device using navigational satellite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102354101A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033828A (en) * | 2012-12-14 | 2013-04-10 | 北京东方联星科技有限公司 | High-sensitivity compass-assisted time servicing device, time service receiver and time service method |
| CN103092067A (en) * | 2012-12-27 | 2013-05-08 | 盛科网络（苏州）有限公司 | Timing method and system based on digital logic |
| CN103676634A (en) * | 2013-12-18 | 2014-03-26 | 中国电子科技集团公司第五十四研究所 | Time pulse synchronization method based on RDSS satellite navigation system |
| CN104460310A (en) * | 2014-11-19 | 2015-03-25 | 广西大学 | Time service device based on Beidou 2nd generation satellite system |
| CN104730919A (en) * | 2015-04-02 | 2015-06-24 | 西安电子科技大学 | Beidou satellite timing system and method |
| CN104749946A (en) * | 2013-12-26 | 2015-07-01 | 卡西欧计算机株式会社 | Radio-controlled Timepiece |
| CN105242525A (en) * | 2015-10-09 | 2016-01-13 | 电子科技大学中山学院 | Wearable intelligent watch capable of realizing Beidou GPS positioning |
| EP2977836A3 (en) * | 2014-07-25 | 2016-04-20 | Seiko Epson Corporation | Satellite signal receiving device, electronic timepiece, and control method of a satellite signal receiving device |
| CN106227031A (en) * | 2016-05-25 | 2016-12-14 | 广州市国飞信息科技有限公司 | A kind of receiver module and single-chip realize satellite and tame and punctual method |
| CN106249584A (en) * | 2016-09-30 | 2016-12-21 | 四川九洲电器集团有限责任公司 | A kind of method for synchronizing time |
| CN106292264A (en) * | 2016-08-23 | 2017-01-04 | 武汉羲和科技有限公司 | A kind of wide area accurate time transmission system strengthening system based on GNSS high accuracy |
| CN106405588A (en) * | 2016-08-27 | 2017-02-15 | 重庆九洲星熠导航设备有限公司 | Integrated GPS and GLONAS positioning time service method |
| CN104238353B (en) * | 2014-09-28 | 2017-07-21 | 郑州威科姆科技股份有限公司 | Fusion method is switched based on the time signal that many constellation systems time differences are independently detected |
| CN109587405A (en) * | 2018-10-24 | 2019-04-05 | 科大讯飞股份有限公司 | Method for synchronizing time and device |
| CN111176107A (en) * | 2020-01-19 | 2020-05-19 | 成都天奥电子股份有限公司 | Quick time service wrist-watch based on No. three systems of big dipper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006074326A (en) * | 2004-09-01 | 2006-03-16 | Nippon Telegr & Teleph Corp <Ntt> | Time synchronization method, communication device and time synchronization system |
| CN101410765A (en) * | 2006-03-31 | 2009-04-15 | 卡西欧计算机株式会社 | Time correction control apparatus and method of time correction control |
| CN101441440A (en) * | 2007-11-21 | 2009-05-27 | 精工爱普生株式会社 | Time adjustment device, timepiece with a time adjustment device, and a time adjustment method |
| CN101969690A (en) * | 2010-10-09 | 2011-02-09 | 东莞市泰斗微电子科技有限公司 | Method and device for transferring time by utilizing navigational satellite |
| CN102141774A (en) * | 2010-12-17 | 2011-08-03 | 成都天奥电子股份有限公司 | Quick time service device and method for Beidou watch |
-
2011
- 2011-08-17 CN CN2011102360807A patent/CN102354101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006074326A (en) * | 2004-09-01 | 2006-03-16 | Nippon Telegr & Teleph Corp <Ntt> | Time synchronization method, communication device and time synchronization system |
| CN101410765A (en) * | 2006-03-31 | 2009-04-15 | 卡西欧计算机株式会社 | Time correction control apparatus and method of time correction control |
| CN101441440A (en) * | 2007-11-21 | 2009-05-27 | 精工爱普生株式会社 | Time adjustment device, timepiece with a time adjustment device, and a time adjustment method |
| CN101969690A (en) * | 2010-10-09 | 2011-02-09 | 东莞市泰斗微电子科技有限公司 | Method and device for transferring time by utilizing navigational satellite |
| CN102141774A (en) * | 2010-12-17 | 2011-08-03 | 成都天奥电子股份有限公司 | Quick time service device and method for Beidou watch |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033828A (en) * | 2012-12-14 | 2013-04-10 | 北京东方联星科技有限公司 | High-sensitivity compass-assisted time servicing device, time service receiver and time service method |
| WO2014089988A1 (en) * | 2012-12-14 | 2014-06-19 | 北京东方联星科技有限公司 | High-sensitivity beidou auxiliary timing device, timing receiver and timing method |
| CN103033828B (en) * | 2012-12-14 | 2015-02-04 | 北京东方联星科技有限公司 | High-sensitivity compass-assisted time servicing device, time service receiver and time service method |
| CN103092067B (en) * | 2012-12-27 | 2015-12-23 | 盛科网络（苏州）有限公司 | Based on time service method and the system of Digital Logic |
| CN103092067A (en) * | 2012-12-27 | 2013-05-08 | 盛科网络（苏州）有限公司 | Timing method and system based on digital logic |
| CN103676634B (en) * | 2013-12-18 | 2015-12-30 | 中国电子科技集团公司第五十四研究所 | Based on the time pulse synchronous method in RDSS satellite navigation system |
| CN103676634A (en) * | 2013-12-18 | 2014-03-26 | 中国电子科技集团公司第五十四研究所 | Time pulse synchronization method based on RDSS satellite navigation system |
| CN104749946A (en) * | 2013-12-26 | 2015-07-01 | 卡西欧计算机株式会社 | Radio-controlled Timepiece |
| CN104749946B (en) * | 2013-12-26 | 2017-06-13 | 卡西欧计算机株式会社 | Wave timepiece |
| EP2977836A3 (en) * | 2014-07-25 | 2016-04-20 | Seiko Epson Corporation | Satellite signal receiving device, electronic timepiece, and control method of a satellite signal receiving device |
| CN104238353B (en) * | 2014-09-28 | 2017-07-21 | 郑州威科姆科技股份有限公司 | Fusion method is switched based on the time signal that many constellation systems time differences are independently detected |
| CN104460310A (en) * | 2014-11-19 | 2015-03-25 | 广西大学 | Time service device based on Beidou 2nd generation satellite system |
| CN104730919A (en) * | 2015-04-02 | 2015-06-24 | 西安电子科技大学 | Beidou satellite timing system and method |
| CN105242525A (en) * | 2015-10-09 | 2016-01-13 | 电子科技大学中山学院 | Wearable intelligent watch capable of realizing Beidou GPS positioning |
| CN106227031A (en) * | 2016-05-25 | 2016-12-14 | 广州市国飞信息科技有限公司 | A kind of receiver module and single-chip realize satellite and tame and punctual method |
| CN106292264A (en) * | 2016-08-23 | 2017-01-04 | 武汉羲和科技有限公司 | A kind of wide area accurate time transmission system strengthening system based on GNSS high accuracy |
| CN106292264B (en) * | 2016-08-23 | 2019-01-29 | 武汉羲和科技有限公司 | A kind of wide area accurate time transmission system enhancing system based on GNSS high-precision |
| CN106405588A (en) * | 2016-08-27 | 2017-02-15 | 重庆九洲星熠导航设备有限公司 | Integrated GPS and GLONAS positioning time service method |
| CN106249584A (en) * | 2016-09-30 | 2016-12-21 | 四川九洲电器集团有限责任公司 | A kind of method for synchronizing time |
| CN106249584B (en) * | 2016-09-30 | 2019-10-01 | 四川九洲电器集团有限责任公司 | A kind of method for synchronizing time |
| CN109587405A (en) * | 2018-10-24 | 2019-04-05 | 科大讯飞股份有限公司 | Method for synchronizing time and device |
| CN109587405B (en) * | 2018-10-24 | 2021-03-05 | 科大讯飞股份有限公司 | Time synchronization method and device |
| CN111176107A (en) * | 2020-01-19 | 2020-05-19 | 成都天奥电子股份有限公司 | Quick time service wrist-watch based on No. three systems of big dipper |
| CN111176107B (en) * | 2020-01-19 | 2021-10-22 | 成都天奥电子股份有限公司 | Quick time service wrist-watch based on No. three systems of big dipper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102354101A (en) | Time service method and device using navigational satellite | |
| EP2331984B1 (en) | Method and apparatus for a global navigation satellite system receiver coupled to a host computer system | |
| US8614641B2 (en) | Hybrid satellite positioning with prediction | |
| CN101969690B (en) | Method and device for transferring time by utilizing navigational satellite | |
| US7411550B2 (en) | System for transmitting positioning signal | |
| CN102109604B (en) | GPS/GALILEO navigation base band processing chip and navigation receiver | |
| RU2014106929A (en) | ADVANCED TIME SYNCHRONIZATION AND TRANSFER OF TIME VALUES FOR SATELLITE GROUPING BY DETERMINING THE DISTANCE BETWEEN SATELLITES AND USE OF THE PRECISE TIME SOURCE | |
| JP5753647B2 (en) | Electronic clock and satellite signal receiving method | |
| US20130257651A1 (en) | Navigation bit boundary determination apparatus and a method therefor | |
| US8466835B2 (en) | Systems and methods for clock correction | |
| CN102393526A (en) | Method for correcting crystal oscillator frequency of satellite navigation receiving device and corresponding device | |
| US10197680B2 (en) | GNSS receiver | |
| CN104935391A (en) | Self-closed-loop time synchronization method of indoor pseudo-satellites | |
| US20130265194A1 (en) | Navigation Bit Boundary Determination Apparatus and a Method Therefor | |
| CN101446635B (en) | Super low-power-consumption low-cost GPS chip framework for mobile facility | |
| TW201409060A (en) | Methods, receivers and devices for synchronizing navigation data | |
| CN103675853A (en) | Navigation message synchronization method, receiver and device | |
| US9184786B2 (en) | Systems and methods for clock calibration for satellite navigation | |
| US20100094554A1 (en) | Systems and Methods for Accessing Data Over a Short-range Data Link to Enhance the Performance of a Navigational Unit | |
| CN103675838A (en) | Navigation message synchronization method, receiver and device | |
| EP3195012B1 (en) | Providing and using assistance data including ionosphere models | |
| JP5924504B2 (en) | Electronic clock | |
| CN103675837A (en) | Navigation message synchronization method, receiver and device | |
| CN201302608Y (en) | GNSS monitoring device | |
| EP2284572B1 (en) | Signal acquisition systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1166233 Country of ref document: HK |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120215 |
|
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1166233 Country of ref document: HK |