CN104460314A - Time correcting method and system - Google Patents
Time correcting method and system Download PDFInfo
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- CN104460314A CN104460314A CN201410693709.4A CN201410693709A CN104460314A CN 104460314 A CN104460314 A CN 104460314A CN 201410693709 A CN201410693709 A CN 201410693709A CN 104460314 A CN104460314 A CN 104460314A
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R40/00—Correcting the clock frequency
- G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Electric Clocks (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The invention discloses a time correcting method and system and belongs to the technical field of time correcting. The method comprises the steps that firstly, a first receiver receives a standard frequency signal sent by a satellite, wherein the standard frequency signal is obtained by a base station navigation center from an atomic clock arranged at the base station navigation center and is sent to the satellite; secondly, a first synchronous frequency signal provided by a first external reference source is received and provides time reference for the first receiver; thirdly, according to the first synchronous frequency signal and the standard frequency signal, the first time deviation between the first receiver and the base station navigation center is determined; fourthly, the first time deviation is used for correcting the first synchronous frequency signal received by the first receiver. By the adoption of the time correcting method and system, satellite resources are greatly saved.
Description
Technical field
The present invention relates to time check and correction technical field, particularly a kind of method and system of proof time.
Background technology
Satellite time transfer is by sending standard-frequency signal to the receiver such as base station receiver, receiver user, and to make receiver correct according to the frequency of this standard-frequency signal to local signal, realization is synchronous with satellite time.
Generally at present atomic clock is arranged on satellite, for satellite provides frequency signal.But because atomic clock is arranged on satellite, cannot ensure the accuracy of atomic clock, general employing four satellites determine standard-frequency signal accurately.
Summary of the invention
In order to solve the larger problem of prior art resource consumption, embodiments provide a kind of method and system of proof time.Described technical scheme is as follows:
On the one hand, embodiments provide a kind of method of proof time, described method comprises:
First receiver receives the standard-frequency signal that satellite sends, and described standard-frequency signal is that base station navigation center obtains from the atomic clock being arranged on described base station navigation center and sends to described satellite;
Receive the first synchronous frequency signal that the first external reference source provides, described first synchronous frequency signal provides time reference for described first receiver;
According to described first synchronous frequency signal and described standard-frequency signal, determine the first deviation time between described first receiver and described base station navigation center;
Adopt described first synchronous frequency signal that described first receiver of described first deviation time check and correction receives.
In a kind of possible implementation of the present invention, described according to described first synchronous frequency signal and described standard-frequency signal, determine the first deviation time between described first receiver and described base station navigation center, comprising:
According to the first receiver described in following formulae discovery and the first deviation time △ t1 between described base station navigation center:
△t1＝1/F1-1/F0；
Wherein, F1 is the frequency of described first synchronous frequency signal, and F0 is the frequency of described standard-frequency signal.
In the another kind of possible implementation of the present invention, described method also comprises:
Receive the second deviation time between the second receiver and described base station navigation center, the described second deviation time described standard-frequency signal that to be described second receiver send according to the described satellite received and the second synchronous reference signal that the second external reference source provides are determined, described second synchronous frequency signal provides time reference for described second receiver;
According to described first deviation time and described second deviation time, determine the 3rd deviation time between described first receiver and described second receiver;
Adopt described first synchronous frequency signal that described first receiver of described 3rd deviation time check and correction receives.
In another possible implementation of the present invention, described method also comprises:
Determine that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center;
Adopt proofread the described standard-frequency signal that described first receiver receives described time delay.
Alternatively, describedly determine that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center, comprising:
Frequency time standard signal described in following formulae discovery is adopted to be sent to the △ t ' time delay of described first receiver from described base station navigation center:
△t’＝{p-[(x
u-x
1)
2+(y
u-y
1)
2+(z
u-z
1)
2]
1/2-[(x
g-x
1)
2+(y
g-y
1)
2+(z
g-z
1)
2]
1/2}/c；
Wherein, p is the pseudorange that satellite forwards, (x
u, y
u, z
u) be the position coordinates of the first receiver, (x
1, y
1, z
1) be the position coordinates of satellite, (x
g, y
g, z
g) be the position coordinates at base station navigation center.
On the other hand, embodiments provide a kind of system of proof time, described system comprises:
Base station navigation center, for obtaining standard-frequency signal from the atomic clock being arranged on described base station navigation center and send to satellite;
Satellite, for receiving the described standard-frequency signal of described base station navigation center transmission and sending to the first receiver;
First receiver, for receiving the described standard-frequency signal that described satellite sends; Receive the first synchronous frequency signal that the first external reference source provides, described first synchronous frequency signal provides time reference for described first receiver; According to described first synchronizing signal and described standard-frequency signal, determine the first deviation time between described first receiver and described base station navigation center; Adopt described first synchronous frequency signal that described first receiver of described first deviation time check and correction receives.
In a kind of possible implementation of the present invention, described first receiver is used for,
According to the first receiver described in following formulae discovery and the first deviation time △ t1 between described base station navigation center:
△t1＝1/F1-1/F0；
Wherein, F1 is the frequency of described first synchronous frequency signal, and F0 is the frequency of described standard-frequency signal.
In the another kind of possible implementation of the present invention, described system also comprises:
Second receiver, for receiving the described standard-frequency signal that described satellite sends; Receive the second synchronous frequency signal that the second external reference source provides, described second synchronous frequency signal provides time reference for described second receiver; According to described second synchronous frequency signal and described standard-frequency signal, determine the second deviation time between described second receiver and described base station navigation center and send to described satellite;
Described satellite also for, receive described second receiver send described second deviation time and send to described first receiver;
Described first receiver also for, according to described first deviation time and described second deviation time, determine the 3rd deviation time between described first receiver and described second receiver; Adopt described first synchronous frequency signal that described first receiver of described 3rd deviation time check and correction receives.
In another possible implementation of the present invention, described first receiver also for,
Determine that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center;
Adopt proofread the described standard-frequency signal that described first receiver receives described time delay.
Alternatively, described first receiver is used for,
Frequency time standard signal described in following formulae discovery is adopted to be sent to the △ t ' time delay of described first receiver from described base station navigation center:
△t’＝{p-[(x
u-x
1)
2+(y
u-y
1)
2+(z
u-z
1)
2]
1/2-[(x
g-x
1)
2+(y
g-y
1)
2+(z
g-z
1)
2]
1/2}/c；
Wherein, p is the pseudorange that satellite forwards, (x
u, y
u, z
u) be the position coordinates of the first receiver, (x
1, y
1, z
1) be the position coordinates of satellite, (x
g, y
g, z
g) be the position coordinates at base station navigation center.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By atomic clock is arranged on base station navigation center, atomic clock can be checked at any time, ensure the accuracy of atomic clock, then by satellite, standard-frequency signal is sent to the first receiver by base station navigation center, first receiver provides the first synchronous frequency signal of time reference according to standard-frequency signal with for the first receiver, determine the first deviation time between the first receiver and satellite, and adopt the first deviation time to proofread the first synchronous frequency signal, realize the synchronous of the first receiver and satellite, a satellite is only needed to realize, greatly save satellite resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the process flow diagram of the method for a kind of proof time that the embodiment of the present invention one provides;
Fig. 2 is the structural representation of the system of a kind of proof time that the embodiment of the present invention two provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
Embodiments provide a kind of method of proof time, see Fig. 1, the method comprises:
Step 101: the first receiver receives the standard-frequency signal that satellite sends.
In the present embodiment, standard-frequency signal is that base station navigation center obtains from the atomic clock being arranged on base station navigation center and sends to satellite, if frequency is the pps pulse per second signal of 1Hz.Base station navigation center can be any one receiver, as base station receiver or receiver user.
It should be noted that, because atomic clock is arranged on base station navigation center by the present invention, instead of on satellite, therefore atomic clock can be checked at any time, ensure the accuracy of atomic clock, do not need the accuracy of employing four satellite confirmed standard frequency signals, decrease the use of satellite resource.
Step 102: receive the first synchronous frequency signal that the first external reference source provides.
In the present embodiment, the first synchronous frequency signal provides time reference for the first receiver.Such as the first external reference source sends the frequency signal of 10MHz to the first receiver, and base station receiver exports the frequency signal of 1kHz according to the frequency signal of 10MHz.That is, first receiver output signal frequency stability and the first external reference signal source be consistent.
Alternatively, the first external reference source can for being arranged on the atomic clock at base station navigation center, and namely base station navigation center can be the first receiver.
Step 103: according to the first synchronous frequency signal and standard-frequency signal, determines the first deviation time between the first receiver and satellite.
In a kind of implementation of the present embodiment, this step 103 can comprise:
The first deviation time △ t1 between the first receiver and base station navigation center is calculated according to following formula (1):
△t1＝1/F1-1/F0(1)；
Wherein, F1 is the frequency of the first synchronous frequency signal, and F0 is the frequency of standard-frequency signal.
Understandably, the first receiver and base station navigation center meet following formula:
△t1＝T1-T0；
T1＝1/(F1-L1)；
T0＝1/F0；
Wherein, T1 is the cycle length of the frequency signal of the first receiver, and T0 is the cycle length of standard-frequency signal, and L1 is the residual error of the first receiver.
After the first receiver and external reference source Complete Synchronization, L1=0, therefore can obtain △ t1=(T1-T0)=(1/ (F1-L1))-(1/F0)=1/F1-1/F0, i.e. formula (1).
Step 104: adopt the first deviation time to proofread the first synchronous frequency signal of the first receiver reception.
Understandably, generally nonsynchronous between first receiver and base station navigation center, there is first deviation time, due to when the first receiver is asynchronous with base station navigation center, if communicate between the first receiver with base station navigation center, then take over party's (as the first receiver) of data correctly cannot resolve the data that transmit leg (as base station navigation center) sends, and therefore needs to utilize the time reference of the first deviation time to the first receiver to correct.
First synchronous frequency signal provides time reference for the first receiver, therefore, after determining the first deviation time between the first receiver and base station navigation center, the first receiver adopts the first deviation time to correct the first synchronous frequency signal received.
Directly communicate surely owing to differing between base station navigation center with the first receiver, the present invention adopts the standard-frequency signal by satellite transmission base station navigation center, the obstacle that can not directly communicate between base station navigation center with the first receiver can be overcome, realize the determination of the first deviation time between the first receiver and satellite.
In a kind of implementation of the present embodiment, the method can also comprise:
Confirmed standard frequency time signal is sent to the time delay of the first receiver from base station navigation center;
Adopt proofread the standard-frequency signal that the first receiver receives time delay.
Understandably, still certain time delay is there is because frequency time standard signal is sent to the process of the first receiver from base station navigation center, therefore confirmed standard frequency time signal is needed to be sent to the time delay of the first receiver from base station navigation center, to adopt this time delay, the standard-frequency signal that the first receiver receives is proofreaded, first receiver is accurately sampled to standard-frequency signal, and then the frequency of accurate confirmed standard frequency signal.
Alternatively, following formula (2) calculating frequency time standard signal is adopted to be sent to the △ t ' time delay of the first receiver from base station navigation center:
△t’＝{p-[(x
u-x
1)
2+(y
u-y
1)
2+(z
u-z
1)
2]
1/2-[(x
g-x
1)
2+(y
g-y
1)
2+(z
g-z
1)
2]
1/2}/c； (2)
Wherein, p is the pseudorange that satellite forwards, (x
u, y
u, z
u) be the position coordinates of the first receiver, (x
1, y
1, z
1) be the position coordinates of satellite, (x
g, y
g, z
g) be the position coordinates at base station navigation center.
Particularly, the position coordinates at the pseudorange that satellite forwards, the position coordinates of satellite, the position coordinates of the first receiver and base station navigation center can adopt prior art to obtain, and is not described in detail in this.
In the another kind of implementation of the present embodiment, the method can also comprise:
Receive the second deviation time between the second receiver and base station navigation center, the second deviation time standard-frequency signal that to be the second receiver send according to the satellite received and the second synchronous reference signal that the second external reference source provides are determined, the second synchronous frequency signal provides time reference for the second receiver;
According to the first deviation time and the second deviation time, determine the 3rd deviation time between the first receiver and the second receiver;
The 3rd deviation time is adopted to proofread the first synchronous frequency signal of the first receiver reception.
Understandably, between the first receiver and the second receiver, the time reference of both communication needs keeps synchronous.When distance between the first receiver and the second receiver is greater than setting value, as the first receiver is arranged on Wuhan, second receiver is arranged on Beijing, then the first receiver can not directly receive the synchronous frequency signal of the second receiver and determine the 3rd deviation time between the first receiver and the second receiver, but adopt above-mentioned implementation, can can determine the 3rd deviation time and the first synchronous frequency signal adopting the 3rd deviation time to proofread the first receiver to receive by first receiver, realize the synchronous of the first receiver and the second receiver.And, first receiver adopts the 3rd deviation time between the first receiver and the second receiver to correct, the first deviation time is adopted to correct with the first receiver, second receiver adopts the second deviation time to carry out correction and compares, synchronous for the first receiver and the second receiver, the accuracy of correction is higher.
The second synchronous reference signal that second receiver provides according to the standard-frequency signal of the satellite transmission received and the second external reference source, determine the second deviation time between the second receiver and base station navigation center, can comprise:
The deviation time △ t2 between the second receiver and base station navigation center is calculated according to following formula (3):
△t2＝1/F2-1/F0(1)；
Wherein, F2 is the frequency of the second synchronous frequency signal, and F0 is the frequency of standard-frequency signal.
Understandably, the second receiver and base station navigation center meet following formula:
△t2＝T2-T0；
T2＝1/(F2-L2)；
T0＝1/F0；
Wherein, T2 is the cycle length of the frequency signal of the second receiver, and T0 is the cycle length of standard-frequency signal, and L2 is the residual error of the second receiver.
After the second receiver and external reference source Complete Synchronization, L2=0, therefore can obtain △ t2=(T2-T0)=(1/ (F2-L2))-(1/F0)=1/F2-1/F0, i.e. formula (3).
According to the first deviation time and the second deviation time, determine the 3rd deviation time between the first receiver and the second receiver, can comprise:
The 3rd deviation time △ t3 between the first receiver and the second receiver is calculated according to following formula (4):
△t3＝△t1-△t2(4)；
Wherein, △ t1 is the first deviation time between the first receiver and base station navigation center, and △ t2 is the second deviation time between the second receiver and base station navigation center.
The embodiment of the present invention is by being arranged on base station navigation center by atomic clock, atomic clock can be checked at any time, ensure the accuracy of atomic clock, then by satellite, standard-frequency signal is sent to the first receiver by base station navigation center, first receiver provides the first synchronous frequency signal of time reference according to standard-frequency signal with for the first receiver, determine the first deviation time between the first receiver and satellite, and adopt the first deviation time to proofread the first synchronous frequency signal, realize the synchronous of the first receiver and satellite, a satellite is only needed to realize, greatly save satellite resource.
Embodiment two
Embodiments provide a kind of system of proof time, see Fig. 2, this system comprises:
Base station navigation center 201, for obtaining standard-frequency signal from the atomic clock being arranged on base station navigation center 201 and send to satellite 202;
Satellite 202, for receiving the standard-frequency signal of base station navigation center 201 transmission and sending to the first receiver 203;
First receiver 203, for receiving the standard-frequency signal that satellite 202 sends; Receive the first synchronous frequency signal that the first external reference source provides, the first synchronous frequency signal provides time reference for the first receiver 203; According to the first synchronizing signal and standard-frequency signal, determine the first deviation time between the first receiver 203 and base station navigation center 201; The first deviation time is adopted to proofread the first synchronous frequency signal of the first receiver 203 reception.
In the present embodiment, atomic clock is arranged on base station navigation center 201, and base station navigation center 201 completes the time proof-reading of all receivers.The satellite 202 receiving standard-frequency signal only has one.
Alternatively, base station navigation center 201 can be in receiver.
In a kind of implementation of the present embodiment, the first receiver 203 may be used for,
The first deviation time between the first receiver 203 and base station navigation center 201 is calculated according to formula (1).
In the another kind of implementation of the present embodiment, this system can also comprise:
Second receiver 204, for receiving the standard-frequency signal that satellite 202 sends; Receive the second synchronous frequency signal that the second external reference source provides, the second synchronous frequency signal provides time reference for the second receiver 204; According to the second synchronous frequency signal and standard-frequency signal, determine the second deviation time between the second receiver 204 and base station navigation center 201 and send to satellite 202;
Satellite 202 also for, receive second receiver 204 send the second deviation time and send to the first receiver 203;
First receiver 203 also for, according to the first deviation time and the second deviation time, determine the 3rd deviation time between the first receiver 203 and the second receiver 204; The 3rd deviation time is adopted to proofread the first synchronous frequency signal of the first receiver 204 reception.
In another implementation of the present embodiment, the first receiver 203 can also be used for,
Confirmed standard frequency time signal is sent to the time delay of the first receiver 203 from base station navigation center 201;
Adopt proofread the standard-frequency signal that the first receiver receives time delay.
Particularly, confirmed standard frequency time signal is sent to the first receiver 203 time delay from base station navigation center 201 can be the direct delay time receiving satellite 202 and calculate of the first receiver 203, also can be the delay time that the first receiver 203 calculates.
Alternatively, the first receiver 203 may be used for,
Following formula (2) calculating frequency time standard signal is adopted to be sent to the time delay of the first receiver 203 from base station navigation center 201.
The embodiment of the present invention is by being arranged on base station navigation center by atomic clock, atomic clock can be checked at any time, ensure the accuracy of atomic clock, then by satellite, standard-frequency signal is sent to the first receiver by base station navigation center, first receiver provides the first synchronous frequency signal of time reference according to standard-frequency signal with for the first receiver, determine the first deviation time between the first receiver and satellite, and adopt the first deviation time to proofread the first synchronous frequency signal, realize the synchronous of the first receiver and satellite, a satellite is only needed to realize, greatly save satellite resource.
It should be noted that: the system of the proof time that above-described embodiment provides is when proof time, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, inner structure by system is divided into different functional modules, to complete all or part of function described above.In addition, the system of the proof time that above-described embodiment provides and the embodiment of the method for proof time belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for proof time, is characterized in that, described method comprises:
First receiver receives the standard-frequency signal that satellite sends, and described standard-frequency signal is that base station navigation center obtains from the atomic clock being arranged on described base station navigation center and sends to described satellite;
Receive the first synchronous frequency signal that the first external reference source provides, described first synchronous frequency signal provides time reference for described first receiver;
According to described first synchronous frequency signal and described standard-frequency signal, determine the first deviation time between described first receiver and described base station navigation center;
Adopt described first synchronous frequency signal that described first receiver of described first deviation time check and correction receives.
2. method according to claim 1, is characterized in that, described according to described first synchronous frequency signal and described standard-frequency signal, determines the first deviation time between described first receiver and described base station navigation center, comprising:
According to the first receiver described in following formulae discovery and the first deviation time Δ t1 between described base station navigation center:
Δt1＝1/F1-1/F0；
Wherein, F1 is the frequency of described first synchronous frequency signal, and F0 is the frequency of described standard-frequency signal.
3. method according to claim 1 and 2, is characterized in that, described method also comprises:
Receive the second deviation time between the second receiver and described base station navigation center, the described second deviation time described standard-frequency signal that to be described second receiver send according to the described satellite received and the second synchronous reference signal that the second external reference source provides are determined, described second synchronous frequency signal provides time reference for described second receiver;
According to described first deviation time and described second deviation time, determine the 3rd deviation time between described first receiver and described second receiver;
Adopt described first synchronous frequency signal that described first receiver of described 3rd deviation time check and correction receives.
4. method according to claim 1 and 2, is characterized in that, described method also comprises:
Determine that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center;
Adopt proofread the described standard-frequency signal that described first receiver receives described time delay.
5. method according to claim 4, is characterized in that, describedly determines that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center, comprising:
Frequency time standard signal described in following formulae discovery is adopted to be sent to the Δ t ' time delay of described first receiver from described base station navigation center:
Δt’＝{p-[(x
u-x
1)
2+(y
u-y
1)
2+(z
u-z
1)
2]
1/2-[(x
g-x
1)
2+(y
g-y
1)
2+(z
g-z
1)
2]
1/2}/c；
Wherein, p is the pseudorange that satellite forwards, (x
u, y
u, z
u) be the position coordinates of the first receiver, (x
1, y
1, z
1) be the position coordinates of satellite, (x
g, y
g, z
g) be the position coordinates at base station navigation center.
6. a system for proof time, is characterized in that, described system comprises:
Base station navigation center, for obtaining standard-frequency signal from the atomic clock being arranged on described base station navigation center and send to satellite;
Satellite, for receiving the described standard-frequency signal of described base station navigation center transmission and sending to the first receiver;
First receiver, for receiving the described standard-frequency signal that described satellite sends; Receive the first synchronous frequency signal that the first external reference source provides, described first synchronous frequency signal provides time reference for described first receiver; According to described first synchronizing signal and described standard-frequency signal, determine the first deviation time between described first receiver and described base station navigation center; Adopt described first synchronous frequency signal that described first receiver of described first deviation time check and correction receives.
7. system according to claim 6, is characterized in that, described first receiver is used for,
According to the first receiver described in following formulae discovery and the first deviation time Δ t1 between described base station navigation center:
Δt1＝1/F1-1/F0；
Wherein, F1 is the frequency of described first synchronous frequency signal, and F0 is the frequency of described standard-frequency signal.
8. the system according to claim 6 or 7, is characterized in that, described system also comprises:
Second receiver, for receiving the described standard-frequency signal that described satellite sends; Receive the second synchronous frequency signal that the second external reference source provides, described second synchronous frequency signal provides time reference for described second receiver; According to described second synchronous frequency signal and described standard-frequency signal, determine the second deviation time between described second receiver and described base station navigation center and send to described satellite;
Described satellite also for, receive described second receiver send described second deviation time and send to described first receiver;
Described first receiver also for, according to described first deviation time and described second deviation time, determine the 3rd deviation time between described first receiver and described second receiver; Adopt described first synchronous frequency signal that described first receiver of described 3rd deviation time check and correction receives.
9. system according to claim 8, is characterized in that, described first receiver also for,
Determine that described frequency time standard signal is sent to the time delay of described first receiver from described base station navigation center;
Adopt proofread the described standard-frequency signal that described first receiver receives described time delay.
10. system according to claim 9, is characterized in that, described first receiver is used for,
Frequency time standard signal described in following formulae discovery is adopted to be sent to the Δ t ' time delay of described first receiver from described base station navigation center:
Δt’＝{p-[(x
u-x
1)
2+(y
u-y
1)
2+(z
u-z
1)
2]
1/2-[(x
g-x
1)
2+(y
g-y
1)
2+(z
g-z
1)
2]
1/2}/c；
Wherein, p is the pseudorange that satellite forwards, (x
u, y
u, z
u) be the position coordinates of the first receiver, (x
1, y
1, z
1) be the position coordinates of satellite, (x
g, y
g, z
g) be the position coordinates at base station navigation center.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877965A (en) * | 2017-03-03 | 2017-06-20 | 中国电子科技集团公司第五十四研究所 | A kind of time synchronizing method of micro-base station central station |
| WO2020043181A1 (en) * | 2018-08-31 | 2020-03-05 | 中兴通讯股份有限公司 | Clock synchronization method and apparatus, system, storage medium, and electronic device |
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| WO2020043181A1 (en) * | 2018-08-31 | 2020-03-05 | 中兴通讯股份有限公司 | Clock synchronization method and apparatus, system, storage medium, and electronic device |
| CN110875818A (en) * | 2018-08-31 | 2020-03-10 | 中兴通讯股份有限公司 | Clock synchronization method, device, system, storage medium and electronic device |
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| CN104460314B (en) | 2017-04-05 |
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