CN104950320A - Method and system for monitoring troposphere correction parameters of ground based augmentation system - Google Patents
Method and system for monitoring troposphere correction parameters of ground based augmentation system Download PDFInfo
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- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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Abstract
The invention discloses a method and a system for monitoring troposphere correction parameters of a ground based augmentation system, which belong to the navigation technology field and improve precision, integrity, availability and continuity of the ground based augmentation system. The method comprises: obtaining first meteorological data and second meteorological data at present; correcting the troposphere parameters according to the first meteorological data, so as to obtain a first group of correction parameters; correcting the troposphere parameters according to the second meteorological data, so as to obtain a second first group of correction parameters; comparing the first and second groups of correction parameters with a meteorological statistical threshold, and outputting a third group of correction parameters according to the comparison result; obtaining a correction error according to augmentation data, navigation data and the third group of correction parameters, comparing the correction error with a preset correction error threshold, and giving an alarm and stopping the ground station augmentation service if the correction error is greater than the preset correction error threshold, or else carrying out the ground station augmentation service.
Description
Technical field
The present invention relates to field of navigation technology, particularly relate to a kind of method and system that ground strengthens system troposphere corrected parameter that monitor.
Background technology
GPS (Global Position System) (Global Navigation Satellite System, guide number SS) is the satellite navigation system of all operation on orbits and the general name of relevant enhancing system.Along with the construction of countries in the world and regional satellite navigation system, having there are 4 satellite navigation systems provides the whole world or area navigation service, comprises GPS, the Big Dipper, GLONASS and GALILEO etc.For improving the navigation performance of satellite navigation system, especially the integrity of satellite navigation is improved, to meet the requirement of the different mission phase of civil aviation user, different navigation specification, on the basis of satellite navigation system independent operating, International Civil Aviation Organization (International Civil Aviation Organization.Be called for short ICAO) define the enhancing system of three types, to strengthen satellite navigation performance.GNSS strengthens system and comprises Aircraft-based augmentation system (Airborne Based Augmentation System, be called for short ABAS), satellite-based augmentation system (Satellite Based Augmentation System, be called for short SBAS), ground strengthens system (Ground Based Augmentation System, be called for short GBAS).
Ground strengthens system and comprises satellite navigation system, land station and airborne equipment, and the main differential technique that adopts reduces GNSS measuring error, reaches the object improving GNSS positioning precision.Differential technique is a kind ofly widely used and reduces effectively and eliminate the method for various GNSS measuring error.The feature of the spatial coherence that the principle of work of differential technique mainly has according to Satellite clock errors, ephemeris error, ionosphere time delay and troposphere time delay and temporal correlation, for the different receivers be in same region (referring generally to: reference receiver and mobile station receiver), this multiple error approximately equal comprised in their GNSS measured value or relevant to distance.The impact of above-mentioned correlated error source on differential corrections precision is as shown in table 1:
Main error source in table 1. ground enhancing system
Strengthen the main error source of system as can be seen from ground, airboarne receiver is overhead stood nearer, and between vacant lot, the correlativity of measuring error is stronger, and the working effect that ground strengthens system is also better.Along with the development of technology, the trajectory accuracy of GPS (Global Position System) is greatly improved, thus makes the error produced by ionosphere delay and tropospheric refraction become the main cause of restriction navigation and localization precision.Simultaneously along with the development of many constellations multifrequency point differential technique, ionospheric error can be eliminated by double frequency differential technique, and tropospheric delay error becomes main error source.
Existing ground strengthens system in the design process, when processing tropospheric delay error, the mode of adding up in advance is adopted to generate troposphere corrected parameter, troposphere corrected parameter is that land station calculates generation by weather data, by VDB (VHF Data Broadcast, very high frequency(VHF) data broadcast) transmitter is sent to aircraft, aircraft airborne equipment utilization troposphere corrected parameter calculates tropospheric delay amount, therefore, the degree of accuracy of troposphere corrected parameter directly affects the error size of the tropospheric delay amount calculated.The troposphere corrected parameter that land station calculates is inaccurate, the tropospheric delay error that airborne equipment calculates is just large, for the region of Changes in weather complexity, especially highlands, the tropospheric delay error that Changes in weather causes is comparatively large, cannot effectively eliminate tropospheric delay error.
Summary of the invention
The invention provides a kind of method and system that ground strengthens system troposphere corrected parameter that monitor, with the problem that the degree of accuracy of the troposphere corrected parameter and tropospheric delay error that solve prior art is poor.
A first aspect of the present invention provides a kind of method that ground strengthens system troposphere corrected parameter that monitors, it is characterized in that, comprise: obtain current first weather data and the second weather data, wherein the first weather data comprises and utilizes meteorological equipment to gather the weather data of near airports, and the second weather data comprises and utilizes aeronautical meteorological service equipment to obtain aviation meteorological information data; According to described first weather data correction troposphere parameter, obtain first group of corrected parameter; According to described second weather data correction troposphere parameter, obtain second group of corrected parameter; Described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value are contrasted, exports the 3rd group of corrected parameter according to comparing result; Round-off error is obtained according to enhancing data, navigation data and described 3rd group of corrected parameter, described round-off error and the round-off error threshold value preset are compared, if described round-off error is greater than described default round-off error threshold value, carry out alarm, stop land station's enhancement service; Otherwise, carry out land station's enhancement service.
According to first aspect, in the implementation that the first is possible, described according to described first weather data correction troposphere parameter, obtain first group of corrected parameter, comprising: obtain first group of corrected parameter according to described first weather data based on Hopfield improved model.
According to first aspect, in the implementation that the second is possible, described according to described second weather data correction troposphere parameter, obtain second group of corrected parameter, comprising: obtain second group of corrected parameter according to described second weather data based on Hopfield improved model.
According to first aspect, in the implementation that the third is possible, described described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value to be contrasted, the 3rd group of corrected parameter is exported according to comparing result, comprise: if described first group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter; Or, if described second group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter; Wherein, described 3rd group of corrected parameter is the smaller of described first group of corrected parameter and described second group of corrected parameter.
According to first aspect, in the 4th kind of possible implementation, described described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value to be contrasted, the 3rd group of corrected parameter is exported according to comparing result, also comprise: if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value, then outputting alarm information, stops land station's enhancement service.
A second aspect of the present invention provides a kind of system that ground strengthens system troposphere corrected parameter that monitors, comprise meteorological equipment, tropospheric monitoring equipment, aeronautical meteorological service equipment, it is characterized in that, also comprise: ground strengthens the processor in system land station, for realizing the supervision to troposphere corrected parameter; Processor in tropospheric monitoring equipment connection land station, the troposphere corrected parameter that real-time assessment generates, and the 3rd group of corrected parameter is sent to the processor in land station.
According to second aspect, in the implementation that the first is possible, described tropospheric monitoring equipment comprises process meteorological data module, corrected parameter contrast module, troposphere corrected parameter computing module, tropospheric delay alarm module and weather data logging modle;
Process meteorological data module, for obtaining current first weather data and the second weather data;
Troposphere corrected parameter computing module, for according to described first weather data correction troposphere parameter, obtains first group of corrected parameter; According to described second weather data correction troposphere parameter, obtain second group of corrected parameter;
Corrected parameter contrast module, for first group of corrected parameter, second group of corrected parameter and meteorological statistical threshold are contrasted, if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value then sends a warning message to tropospheric delay alarm module, otherwise, export the 3rd group of corrected parameter;
Weather data logging modle, for generating meteorological statistics threshold value and round-off error threshold value.
Supervision ground provided by the invention strengthens the method and system of system troposphere corrected parameter, by the weather data that Real-time Collection is current, compare by utilizing the first corrected parameter, the second corrected parameter and meteorological statistical threshold, obtain more accurately to flow process corrected parameter, less round-off error σ can be obtained
tropomore accurate troposphere time delay TC, improves the accuracy that ground strengthens system.Simultaneously for land station provides fault warning, improve the integrity of ground enhancing system, availability and successional service ability, improve ground and strengthen the safety and reliability that system is applied to civil aviation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
A kind of Method And Principle figure monitoring ground enhancing system troposphere corrected parameter that Fig. 1 provides for the embodiment of the present invention;
A kind of schematic flow sheet monitoring the method for ground enhancing system troposphere corrected parameter that Fig. 2 provides for the embodiment of the present invention;
A kind of structural representation monitoring the system of ground enhancing system troposphere corrected parameter that Fig. 3 provides for the embodiment of the present invention;
A kind of structural representation monitoring the tropospheric monitoring equipment of the system of ground enhancing system troposphere corrected parameter that Fig. 4 provides for the embodiment of the present invention;
A kind of data transmission relations schematic diagram monitoring the system of ground enhancing system troposphere corrected parameter that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.
GNSS ground involved in the present invention strengthens system and comprises satellite navigation system, land station and airborne equipment.Wherein, satellite navigation system refers to that Navsat produces distance measuring signal, sends to the system of land station and airborne equipment.Land station, i.e. GBAS surface facility, comprise four reference receivers, processor, a set of VDB (VHF Data Broadcast, very high frequency(VHF) data broadcast) transmitter and receiver, according to the pseudorange modified value of satellite ranging signal and reference receiver accurate position calculation satellite known in advance, obtain system health information by integrity monitoring algorithm, these information are sent to airborne equipment through VDB transmitter.Airborne equipment is mainly multi-mode receiver, receiving and processes the signal launched by satellite navigation system and land station, exporting the position data through revising and integrity warning information.Specifically described below.
A kind of Method And Principle figure monitoring ground enhancing system troposphere corrected parameter that Fig. 1 provides for the embodiment of the present invention, Fig. 2 illustrate only committed step wherein, and has carried out simplified illustration.With reference to figure 1 and Fig. 2, the method mainly comprises:
Step 10, obtain current first weather data and the second weather data.
Wherein, GNSS ground is strengthened the land station of system, management and control center and position field monitoring station, connected by optical fiber ring network, adopt TCP/IP link to carry out data communication, the data communication between guarantee system is reliable and stable.Control Centre is airdrome control system, and position field monitoring station is used to the autonomous device of monitoring ground based augmentation system performance.The advantage of looped network is, after there is network breakpoint, three subsystems can also be normally interconnected, improves the reliability of system.Than the advantage of cable system, fiber optic network is that anti-electromagnetic interference capability is strong.Therefore, optical fiber ring network is than the latticed form of other types, such as Star Network, and advantage is larger.
Utilize meteorological equipment to gather the first weather data of near airports, utilize aeronautical meteorological service equipment to obtain aviation meteorological information data, i.e. the second weather data.
Can meteorological equipment collection per second weather data and aeronautical meteorological service equipment acquisition aviation meteorological information per second data be passed through, obtain current first weather data and the second weather data, thus in real time to tropospheric monitoring.
Step 11, according to the first weather data correction troposphere parameter, obtain first group of corrected parameter; According to the second weather data correction troposphere parameter, obtain second group of corrected parameter.
Troposphere parameter mainly comprises tropospheric refraction index N
r, average air height h
0with refraction uncertainty refraction uncertainty σ
n.N
r, h
0be used for calculating tropospheric delay amount, σ
nbe used for assessing tropospheric delay error.
Preferably, first group of corrected parameter is obtained according to described first weather data based on Hopfield improved model.
Preferably, second group of corrected parameter is obtained according to described second weather data based on Hopfield improved model.
Obtain first group of corrected parameter or second group of corrected parameter based on Hopfield improved model, concrete computation process is as follows:
For the ease of scientific research and calculating, usually convert tropospheric refractive index n to refraction index N
r, and be defined as
N
R＝(n-1)×10
-6(1)
For ionosphere, the impact of troposphere on signal is more complicated, considers that in troposphere, steam changes the impact brought, and under study for action, tropospheric delay is divided into dry delay and wet stack emission to consider.Tropospheric refactive index N
rusually dry component refraction index N is divided into
rdrywith hygroscopic water amount refraction index N
rwettwo parts, dry component refers generally to the dry air such as oxygen and nitrogen, and hygroscopic water amount mainly refers to water vapor, and the refractive index experimental formula of these two components is as follows:
N
R＝N
Rdry+N
Rwet(2)
Or
Wherein, P
0for the atmospheric pressure that base station collects, T
0for the temperature that base station collects.E
0for the steam dividing potential drop in units of millibar, these meteorologic parameters are all different along with the difference of height.But, due to e
0directly can not being measured by meteorological sensor, therefore, generally when calculating, being changed by relative humidity RH.Transfer algorithm is as follows:
Therefore, the computing method of tropospheric refactive index are equivalent to,
In order to computation of mean values air height parameter h
0, need equally to be divided into dry component (h
0dry) and hygroscopic water amount (h
0wet), circular is,
Wherein, h
sfor base station sea level elevation, unit is rice.
Utilize above-mentioned component, average air height parameter h can be obtained
0,
Refraction uncertainty:
The present embodiment includes but not limited to realize based on Hopfield improved model, and other technologies also have Hopfield model and Saastamoinen model.
Hopfield improved model is utilized to obtain troposphere corrected parameter N
r, h
0and σ
n., obtain first group of corrected parameter N by the first weather data
r1, h
01and σ
n1; Second group of corrected parameter N is obtained by the second weather data
r2, h
02and σ
n2.
Step 12, first group of corrected parameter and second group of corrected parameter and meteorological statistics threshold value to be contrasted, export the 3rd group of corrected parameter according to comparing result.
If described first group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter; Or,
If described second group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter;
Wherein, described 3rd group of corrected parameter is the smaller of described first group of corrected parameter and described second group of corrected parameter.
In addition, if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value, then outputting alarm information, stops enhancement service.
Meteorological statistics threshold value is the weather data of 1 year that utilizes aerodrome equipment to gather, and carries out statistics and obtains, by the refraction uncertainty σ calculated every day
n, carry out coefficient magnify and obtain meteorological statistics threshold value.Such as, adopt following formulae discovery,
Such as, σ
n1< σ
n2, σ
n1be the parameter in first group of corrected parameter, σ
n2be the parameter in second group of corrected parameter, σ
n_Thresholdfor meteorological statistics threshold value, if σ
n1< σ
n_Thresholdor σ
n2< σ
n_Threshold, then σ is exported
n1first group of corresponding corrected parameter N
r1, h
01and σ
n1as the 3rd group of corrected parameter N
r, h
0and σ
n.。
If σ
n1> σ
n_Thresholdand σ
n2> σ
n_Threshold, then outputting alarm information, stops land station's enhancement service.
Land station's enhancement service is the differential data being sent land station's production by VDB transmitter, and aircraft carries out difference processing by these data and improves positioning precision, and vector aircraft lands.Enhancement service is stopped to be exactly that VDB transmitter stops transmitting data.
Step 13, obtain round-off error according to enhancing data, navigation data and the 3rd group of corrected parameter, round-off error and the round-off error threshold value preset are compared, if round-off error is greater than default round-off error threshold value, carries out alarm, stop land station's service; Otherwise, carry out land station's enhancement service.
Utilize the VDB transmitter of land station, the 3rd group of corrected parameter is broadcasted according to RTCA DO-246 form.
Strengthen data and mainly refer to differential corrections data, comprise pseudorange corrected parameter, troposphere corrected parameter, boat footpath data etc.
Ground navigation data are received the navigation data of satellite launch by receiver antenna by land station's reference receiver, the navigation data on aircraft is received the navigation data of satellite launch by antenna by airborne equipment.
The enhancing data that position field monitoring means satellite receiver sends, carry out difference processing and integrity process with the navigation data received, and obtain round-off error σ
tropo, by round-off error σ
tropowith round-off error threshold value σ
tropo_Thresholdcompare, if σ
tropo> σ
tropo_Thresholdthen carry out alarm, stop land station's service, ensure the security of enhancement service; Otherwise, carry out normal land station enhancement service.
Fluid layer time delay TC and round-off error σ
tropobe that the 3rd corrected parameter calculating that airborne equipment utilizes land station to broadcast gets, method is as follows,
Wherein, θ: be the elevation angle of satellite observed;
Δ h: aircraft is relative to the height on ground.
Current computing method utilize meteorological historical data to add up to obtain, and the present embodiment, by the weather data that Real-time Collection is current, compare by utilizing the first corrected parameter, the second corrected parameter and meteorological statistical threshold, obtain more accurately to flow process corrected parameter, utilize formula 11 and 12, less round-off error σ can be obtained
tropomore accurate troposphere time delay TC, improves the accuracy that ground strengthens system.Simultaneously for land station provides fault warning, improve the integrity of ground enhancing system, availability and successional service ability, improve ground and strengthen the safety and reliability that system is applied to civil aviation.
With reference to figure 3 and Fig. 4, the present invention, for monitoring that the device of GNSS ground enhancing system troposphere corrected parameter needs to connect the processor A3 in GNSS ground enhancing system land station A, realizes the supervision to troposphere corrected parameter.This system comprises: meteorological equipment A1, tropospheric monitoring device A 2, aeronautical meteorological service equipment C1.In this device, tropospheric monitoring device A 2 needs to connect the processor A3 in land station A, the troposphere corrected parameter that real-time assessment generates, and effective parameter is sent to processor A3, broadcast, final reliability and the accuracy improving ground enhancing system works.Tropospheric monitoring device A 2 comprises: process meteorological data modules A 21, corrected parameter contrast modules A 22, troposphere corrected parameter computing module A23, tropospheric delay alarm module A24, weather data logging modle A25, as shown in Figure 4.
Process meteorological data modules A 21, for obtaining current first weather data and the second weather data.
Troposphere corrected parameter computing module A23, for according to described first weather data correction troposphere parameter, obtains first group of corrected parameter; According to described second weather data correction troposphere parameter, obtain second group of corrected parameter.
Corrected parameter comparing module A22, for first group of corrected parameter, second group of corrected parameter and meteorological statistical threshold are compared, if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value then sends a warning message to tropospheric delay alarm module A24, otherwise, export the 3rd group of corrected parameter.
Weather data logging modle A25, for generating troposphere corrected parameter threshold value.
With reference to figure 5, the data transmission relations of whole system of the present invention are as follows:
Data 1 (i.e. the first weather data, mainly comprises temperature, humidity and air pressure) are sent to tropospheric monitoring device A 2 by meteorological equipment A1.
Aeronautical meteorological service equipment C1 is erected at Control Centre, real-time reception flight information data, parse data 2 (i.e. the second weather data, mainly comprises the information such as temperature, humidity, air pressure, wind speed, cloud, precipitation) and be sent to tropospheric monitoring device A 2.
Tropospheric monitoring device A 2, after receiving meteorological equipment A1 transmission weather data 1, sends to process meteorological data modules A 21 and weather data logging modle A25.Meanwhile, receive the data 2 that aeronautical meteorological service equipment C1 sends, send to process meteorological data modules A 21 and weather data logging modle A25.
Weather data logging modle A25, carries out record by weather data 4 and aviation meteorological data 6, for late time data statistics, generates troposphere round-off error threshold value.
The weather data utilizing receive every day carries out averaging and variance statistic, and such as utilize the data of 1 year to calculate troposphere round-off error threshold value, method is as follows:
Process meteorological data modules A 21, processes in real time by weather data 3 and aviation meteorological data 5, obtains the weather datas such as the temperature (T) of consolidation form, air pressure (P) and relative humidity (RH).
Troposphere corrected parameter computing module A23, utilizes temperature (T), air pressure (P) and relative humidity (R
h) etc. weather data, adopt Hopfield improved model to calculate troposphere corrected parameter 8, mainly comprise tropospheric refactive index (N
r) average air height (h
0) and refraction uncertainty (σ
n).
Corrected parameter comparing module A22, for first group of corrected parameter, second group of corrected parameter and meteorological statistical threshold are compared, if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value then sends a warning message to tropospheric delay alarm module A24, otherwise, export the 3rd group of corrected parameter.
Tropospheric delay alarm module A24, receives the troposphere corrected parameter 11 that corrected parameter comparing module A22 sends, after formaing, sends to processor A3; If do not receive troposphere corrected parameter 11, illustrate that the corrected parameter utilizing the weather data of Real-time Collection to calculate all exceedes threshold value, this module sends warning information to processor A3.
Processor A3, after receiving the troposphere corrected parameter 13 of tropospheric delay alarm module A24 transmission, carries out providing data formatting, according to the packing of RTCA DO-246 form, is broadcasted by VDB transmitter.If receive the warning information that tropospheric delay alarm module A24 sends, processor A3, by stopping packing operation, stops land station's enhancement service, until alarm is cancelled.
VDB transmitter is a kind of VHF radio, is the equipment in land station, for the enhancing data that Broadcast Terrestrial station generates, comprises pseudorange correction data, data are revised in troposphere and footpath data etc. of navigating.Airborne equipment is exactly after the data receiving VDB transmitter broadcasts, in conjunction with the satellite navigation data received, carries out difference processing.
Interface a in Fig. 5, interface b and interface c are the process of data layout, belong to prior art, do not describe in detail herein.
Compared with prior art tool of the present invention has the following advantages:
The present invention, owing to being connected with Control Centre in GNSS ground enhancing system land station, position field monitoring station by optical fiber ring network, being achieved the information interaction of these three subsystems, reduces the false dismissal probability of system, improve the integrity of system.
The present invention carries out real time on-line monitoring owing to adopting position field monitoring station to the enhancing data issued, effectively can monitor the precision of the troposphere corrected parameter that land station broadcasts and the impact on Differential positioning precision, and carry out Real-time Feedback, improve the safety and reliability that GNSS ground strengthens system.
The present invention is by weather data and the Control Centre aviation meteorological data received per second of local meteorological equipment collection per second, carry out real-time tropospheric monitoring, generate troposphere corrected parameter, reduce tropospheric delay error, improve Differential positioning precision, effectively reduce troposphere change strengthens system impact on GNSS ground.
The present invention, relative to the ground enhancement service system not possessing troposphere corrected parameter surveillance coverage, more effectively improves the accuracy to ground enhancing system enhancement service, integrity, availability and successional surveillance coverage.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (7)
1. monitor that ground strengthens a method for system troposphere corrected parameter, it is characterized in that, comprising:
Obtain current first weather data and the second weather data, wherein said first weather data comprises and utilizes meteorological equipment to gather the weather data of near airports, and described second weather data comprises and utilizes aeronautical meteorological service equipment to obtain aviation meteorological information data;
According to described first weather data correction troposphere parameter, obtain first group of corrected parameter; According to described second weather data correction troposphere parameter, obtain second group of corrected parameter;
Described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value are contrasted, exports the 3rd group of corrected parameter according to comparing result;
Round-off error is obtained according to enhancing data, navigation data and described 3rd group of corrected parameter, described round-off error and the round-off error threshold value preset are compared, if described round-off error is greater than described default round-off error threshold value, carry out alarm, stop land station's enhancement service; Otherwise, carry out land station's enhancement service.
2. method according to claim 1, it is characterized in that, described according to described first weather data correction troposphere parameter, obtain first group of corrected parameter, comprising: obtain first group of corrected parameter according to described first weather data based on Hopfield improved model.
3. method according to claim 1, it is characterized in that, described according to described second weather data correction troposphere parameter, obtain second group of corrected parameter, comprising: obtain second group of corrected parameter according to described second weather data based on Hopfield improved model.
4. method according to claim 1, is characterized in that, describedly described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value is contrasted, and exports the 3rd group of corrected parameter, comprising according to comparing result:
If described first group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter; Or,
If described second group of corrected parameter is less than meteorological statistics threshold value, export the 3rd group of corrected parameter;
Wherein, described 3rd group of corrected parameter is the smaller of described first group of corrected parameter and described second group of corrected parameter.
5. method according to claim 1, is characterized in that, describedly described first group of corrected parameter and described second group of corrected parameter and meteorological statistics threshold value is contrasted, and exports the 3rd group of corrected parameter, also comprise according to comparing result:
If described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value, then outputting alarm information, stops land station's enhancement service.
6. monitor that ground strengthens a system for system troposphere corrected parameter, comprise meteorological equipment, tropospheric monitoring equipment, aeronautical meteorological service equipment, it is characterized in that, also comprise:
Ground strengthens the processor in system land station, for realizing the supervision to described troposphere corrected parameter;
Processor in land station described in tropospheric monitoring equipment connection, the described troposphere corrected parameter that real-time assessment generates, and the 3rd group of corrected parameter is sent to the processor in described land station.
7. system according to claim 6, is characterized in that, described tropospheric monitoring equipment comprises process meteorological data module, corrected parameter contrast module, troposphere corrected parameter computing module, tropospheric delay alarm module and weather data logging modle;
Process meteorological data module, for obtaining current first weather data and the second weather data;
Troposphere corrected parameter computing module, for according to described first weather data correction troposphere parameter, obtains first group of corrected parameter; According to described second weather data correction troposphere parameter, obtain second group of corrected parameter;
Corrected parameter contrast module, for first group of corrected parameter, second group of corrected parameter and meteorological statistical threshold are contrasted, if described first group of corrected parameter is more than or equal to meteorological statistics threshold value, and described second group of corrected parameter is more than or equal to meteorological statistics threshold value then sends a warning message to tropospheric delay alarm module, otherwise, export the 3rd group of corrected parameter;
Weather data logging modle, for generating meteorological statistics threshold value and round-off error threshold value.
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| CN116299181A (en) * | 2023-03-17 | 2023-06-23 | 成都理工大学 | Sound source three-dimensional space positioning system |
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