CN101893713B - Device and method for monitoring release information performance of local area augmentation system - Google Patents
Device and method for monitoring release information performance of local area augmentation system Download PDFInfo
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Abstract
The invention discloses a device and a method for monitoring release information performance of a local area augmentation system, which mainly solve the problem that a release information performance monitoring system cannot acquire intermediate operation data and state data of a ground subsystem and cannot provide a fault repairing function for the ground subsystem in an operation process. In the device, a release information monitoring unit monitors performance by using the release information and navigation data output by a receiver and the transmission data of a ground network, a performance comprehensive evaluation unit makes a comprehensive judgment on the monitoring result, the ground subsystem and a control centre system provide release information contrast data through the ground network, and when a reference receiver of the ground subsystem goes wrong, the ground network sends navigation observation data to the ground subsystem to repair the data of a fault receiver. The device and the method improve the precise, complete, available and continuous capability for monitoring the local area augmentation system and can be used for the release information monitoring and fault alarm of the local area augmentation system.
Description
Technical field
The invention belongs to GLONASS (Global Navigation Satellite System) (Global Navigation Satellite System, GNSS), relate to the GPS GPS, particularly a kind of supervision device and method of performance that releases news can be used for monitoring and fault warning that the Local Area Augmentation System ground subsystem releases news.
Background technology
GPS (Global Positioning System, GPS) is a kind of satellite-based radio navigation system.Local Area Augmentation System (Local Area Augmentation System, LAAS) be (the Federal Aviation Administration of US Federal Aviation Administration, FAA) ground that proposes strengthens (the Ground Based Augmentation System of system, GBAS), to be applied to a type of differential GPS (Differential GPS, DGPS) that aircraft carries out precision approach.
Local Area Augmentation System comprises satellite subsystem, ground subsystem and On-Board Subsystem.Wherein:
Satellite subsystem: refer to that Navsat produces distance measuring signal, sends to the system of ground subsystem and On-Board Subsystem.
Ground subsystem: be called LAAS surface facility (LAAS Ground Facility, LGF), comprise several reference receivers, data processor and a cover very high frequency(VHF) Data-Link, according to satellite ranging signal and the prior pseudorange modified value of known reference receiver accurate position calculation satellite, obtain system health information by the integrity monitoring algorithm, these information are packaged into packet by DO-246 agreement prescribed form and send to On-Board Subsystem through the very high frequency(VHF) Data-Link the most at last.
On-Board Subsystem: major equipment is multi-mode receiver (Multi-Mode Receiver, MMR), receives and process the signal by gps satellite subsystem and ground subsystem emission, and output is separated and the integrity warning information through the position of revising.
The major function of Local Area Augmentation System is to provide accurate differential corrections data and integrity data for On-Board Subsystem.
Because ground subsystem and On-Board Subsystem accuracy requirement are defined in the distance domain, and the total system accuracy requirement is to be defined in the position field, the subsystem accuracy requirement of distance domain and the total system accuracy requirement of position field need to be connected, can be satisfied to guarantee the system accuracy demand.Therefore need by difference processing, eliminate range error public between ground and the On-Board Subsystem, improve the bearing accuracy of On-Board Subsystem with this.
System health, the system that is defined as hinder for some reason or overproof causing can not be when the navigational system, and system should in time send to the user ability of alarm.Gps satellite provides integrity information to the user in the navigation message that sends, but some system failure master station will through in half an hour in addition several hours ability find that this can't satisfy demand for security in civil aviation is used.For guaranteeing that the gps system integrity satisfies the requirement of civil aviation navigational system, need ground subsystem that integrity information is provided, guarantee that aircraft advances the safety of nearly landing.
Because the navigation accuracy that the Differential corrections that ground subsystem sends and integrity information directly have influence on On-Board Subsystem and advance nearly landing safety, extra distance measuring signal are disturbed and the interference of VDB signal will affect continuity and the availability of system.The continuity that releases news and reliability are to ensure that airborne user advances nearly safe key.The performance parameters such as the precision of the accuracy of difference information, Final Approach section (Final Approach Segment, FAS) data point, the covering of VDB scene all can exert an influence to the navigation accuracy of On-Board Subsystem simultaneously.And these critical factors impenetrably face system itself monitor.Because space environment is uncertain, there is variable factor in above-mentioned key parameter, if these variable factors are not monitored, will directly reduce accuracy, reliability, integrity and the availability of system.
In recent years, various countries' develop actively Local Area Augmentation System is used for the service of civil aviation precision approach.Especially the SLS system of Honeywell company exploitation has installed on a plurality of airports and has carried out pilot fight.At present, this system is in authentication phase.Simultaneously, Thales company has also developed GBAS monitoring station GMS670, and this device has been installed a plurality of airports the Local Area Augmentation System that Honywell company develops is carried out performance monitoring.
Because above-mentioned two cover systems are respectively by different company's exploitations, the GSM670 system is the performance monitoring system that is independent of the Local Area Augmentation System exploitation simultaneously, therefore aspect data sharing, there is defective, middle service data and status data that can't Real-time Obtaining Local Area Augmentation System ground subsystem in the operational process cause the decline of performance supervision ability thus.The GSM670 system can only provide supervision and the alarm ability of Local Area Augmentation System performance simultaneously, does not possess the fault correction function to ground subsystem, can't further improve the safety and reliability of Local Area Augmentation System.
Summary of the invention
The object of the invention is to overcome the performance monitoring system that releases news and in operational process, can't obtain the middle service data of Local Area Augmentation System ground subsystem and the problem of status data, and the defective that fault correction function can't be provided for ground subsystem, provide a cover to be used for the device and method that ground subsystem releases news and monitors, with enhancing release news supervision and the alarm ability of performance monitoring system, improve the safety and reliability of Local Area Augmentation System.
For achieving the above object, provided by the invention for monitoring the release news device of performance of Local Area Augmentation System, comprising:
The GNSS receiver: be used for receiving gps signal, output navigation observation data is processed to the monitor unit that releases news;
The VDB receiver: be used for receiving the VDB signal, the data of output Local Area Augmentation System issue are processed to the monitor unit that releases news;
The MMR multimode rake receiver: be used for the airborne user of emulation, output approach guidance information is carried out evaluation process to the performance synthesis assessment unit;
Monitor unit releases news: be used for to collect data, and resolve, difference location, accuracy computation and accuracy comparison process, the monitoring data after processing is outputed to the performance synthesis assessment unit assesses;
Performance synthesis assessment unit: for the treatment of the result that respectively monitors module in the monitor unit that releases news, the data analysis of local area enhancing system issue is namely according to a class precision approach service request, horizontal location precision＜16m, perpendicular positioning precision＜4m, VDB data failure rate＜10
-3, VPL＜VAL, LPL＜LAL generates assessment result;
Wherein: the monitor unit that releases news comprises:
Integrity information evaluation module: be used for carrying out the calculating of gps satellite integrity according to the relevant information of Local Area Augmentation System ground subsystem broadcasting, and export vertical protection class VPL and horizontal protection class LPL, VPL, LPL are compared to check satellite integrity situation with vertical alarm grade VAL, horizontal alarm grade LAL respectively, the event information of statistics and record PL＞AL;
Differential performance evaluation module: be used for strengthening systematically the differential data of face system broadcasting according to GNSS navigation observation data and local and position and resolve, positioning solution and known reference position are compared, the compute location precision monitors whether bearing accuracy satisfies the accuracy requirement of a class precision approach;
The reference receiver redundant module: be used for repairing Local Area Augmentation System ground subsystem receiver fault, substitute the fault receiver, subsystem sends original GNSS navigation observation data earthward, calculates differential corrections data and integrity data;
VDB signal monitoring module: be used for monitoring the quality of current VDB signal, comprise signal power, transmission frequency, transmission time slot output, the rate of change of statistics emission interruption, unwanted emission, error message and signal power;
FAS data verification module: be used for and compare by the FAS data of ground network announcement by FAS data and the management and control centring system of ground network transmission by FAS data, ground subsystem that the ground subsystem that VDB receives is broadcasted, whether correct with these data that monitor the VDB issue, and the statistics anomalous event;
Data recordin module: be used for raw data that the record monitor unit receives, intermediate treatment data and finally statistics and result of calculation, with this foundation as later stage inquiry and statistics.
For achieving the above object, provided by the invention for monitoring the release news method of performance of Local Area Augmentation System, may further comprise the steps:
(1) Local Area Augmentation System ground subsystem, management and control centring system and the performance monitoring device that is connected are connected by ground network, adopt the TCP/IP link to carry out data communication;
(2) management and control centring system sends Final Approach section boat footpath data to ground subsystem and the performance monitoring device that releases news by ground network;
(3) ground subsystem is with differential corrections data, integrity data, airport data with advance near section boat footpath data communication device and cross the VDB space channel and broadcast, simultaneously these data communication devices are crossed ground network and send to the performance monitoring device that releases news, and work information is sent to release news performance monitoring device and management and control centring system by ground network;
(4) the release news described ground network data that the performance monitoring device will receive and described VDB space channel data that receive are compared, monitor at data field whether the data by the space channel issue exist unusually, if each corresponding data item is numerically identical, the data that then show the space channel issue are normal, otherwise the data of space channel issue exist unusual;
(5) monitor by the data to the ground subsystem issue of integrity information evaluation module, differential performance evaluation module, VDB signal monitoring module and FAS data verification module in the performance monitoring device that releases news, obtain integrity information and monitor that result, differential performance monitor result, VDB signal monitoring result and FAS data monitoring result;
(6) utilize the integrity information evaluation module to generate integrity information and monitor the result, the differential performance evaluation module generates differential performance and monitors the result, VDB signal monitoring module generates VDB signal monitoring result, FAS data verification module generates FAS data monitoring result, the performance synthesis assessment unit carries out analysis-by-synthesis to above-mentioned supervision result, can't satisfy horizontal location precision＜16m for bearing accuracy, during the condition of perpendicular positioning precision＜4m, generate differential service alarm assessment result; Can't satisfy crash rate＜10 for the VDB data
-3Condition the time, generate VDB data alarm assessment result; Can't satisfy simultaneously VPL＜VAL for the integrity data, during LPL＜LAL, generate integrity alarm assessment result; Satisfy simultaneously horizontal location precision＜16m for bearing accuracy, VDB data and integrity data, perpendicular positioning precision＜4m, VDB data failure rate＜10
-3, when VPL＜VAL, LPL＜LAL condition, generate the normal assessment result of service;
(7) the release news work information of performance monitoring device real time monitoring ground subsystem, if when finding that number that the ground subsystem reference receiver breaks down is greater than 2, by ground network earthward subsystem send observation data, fault to ground subsystem is repaired, and guarantees that ground subsystem can normally move;
(8) the performance monitoring device that releases news will monitor that the result sends the management and control center to through ground network, to realize real time monitoring and the abnormality alarming to releasing news.
Compared with prior art the present invention has following advantage:
The present invention has realized the information interaction of these three large systems owing to by ground network ground subsystem, management and control centring system and the performance monitoring device that is connected are connected, and has reduced the false dismissal probability of system, has shortened the fault warning time.
The present invention carries out real time monitoring because the performance monitoring device that releases news is set up in employing to differential data and the integrity data of ground subsystem broadcasting, thereby can find in time that differential data fault, VDB signal fault, FAS data fault etc. affect the key factor that aircraft advances nearly security.
The present invention improves the redundance of reference receiver owing to utilize the performance monitoring device that releases news to provide fault correction function for Local Area Augmentation System ground subsystem reference receiver, has effectively reduced the probability of Local Area Augmentation System generation service disruption.
The present invention has more effectively improved accuracy, integrity, availability and the successional surveillance coverage of local area enhancing system enhancement service with respect to the local enhancement service system that does not possess the performance supervision ability that releases news.
Description of drawings
Fig. 1 is the one-piece construction block diagram of apparatus of the present invention;
Fig. 2 is the monitor unit structured flowchart that releases news in apparatus of the present invention;
Fig. 3 is the transmission relation figure of the whole device of the present invention;
Fig. 4 is the main-process stream synoptic diagram of the inventive method;
Fig. 5 is the reparation sub-process synoptic diagram in the inventive method.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Embodiment
Local Area Augmentation System involved in the present invention comprises satellite subsystem, ground subsystem and On-Board Subsystem.Wherein, the satellite subsystem refers to that Navsat produces distance measuring signal, sends to the system of ground subsystem and On-Board Subsystem.Ground subsystem is called the LAAS surface facility, comprise several reference receivers, data processor and a cover very high frequency(VHF) Data-Link, according to satellite ranging signal and the prior pseudorange modified value of known reference receiver accurate position calculation satellite, obtain system health information by the integrity monitoring algorithm, these information are packaged into packet by the DO-246 prescribed form the most at last, send to On-Board Subsystem through the very high frequency(VHF) Data-Link.The On-Board Subsystem major equipment is multi-mode receiver, receives and process the signal by gps satellite subsystem and ground subsystem emission, and output is separated and the integrity warning information through the position of revising.
With reference to Fig. 1, the present invention be used for to monitor that the release news device B of performance of Local Area Augmentation System need to carry out with outside Local Area Augmentation System ground subsystem A and outside management and control centring system C interconnectedly, realizes the release news supervision of performance of local area enhancing system.Apparatus of the present invention B comprises: GNSS receiver B1, VDB receiver B2, MMR multimode rake receiver B3, monitor unit B4 and performance synthesis assessment unit B5 release news.Possess two cover GNSS receiver B1, VDB receiver B2 and the monitor unit B4 that releases news in this device, be connected to two input ends of performance synthesis assessment unit B5, the release news double copies function of monitor unit B4 of realization improves reliability and the continuity of the work of this unit.The monitor unit B4 that releases news comprises: integrity information evaluation module B41, differential performance evaluation module B42, reference receiver redundant module B43, VDB signal monitoring module B44, FAS data verification module B45 and data recordin module B46, as shown in Figure 2.
With reference to figure 3, the transmission relation of the whole device of the present invention is as follows:
Outside management and control centring system C, send respectively the FAS data to ground subsystem A and the present invention performance monitoring device B that releases news by ground network, be about to FAS data 28 and send to Local Area Augmentation System ground subsystem A, be used for ground subsystem and generate distributing data, FAS data 26 are sent to the performance monitoring device B that releases news, these FAS data 28 are identical with FAS data 26 contents, FAS data 26 are transmitted by interface e, and outside management and control centring system C also is responsible for the performance monitoring device B Output rusults 25 that releases news is shown simultaneously.
Ground subsystem A, navigation data according to reference receiver, calculate differential corrections data and integrity data, then with differential corrections data, integrity data, airport data with advance near section boat footpath data communication device and cross the VDB space channel and broadcast, simultaneously these distributing datas 29, work information 30 are sent to the performance monitoring device B that releases news by ground network, distributing data 29 and floor data 30 are transmitted by interface d.
GNSS receiver B1 receives gps signal, and output navigation observation data comprises pseudo range data, ephemeris, almanac, satellite clock correction and temporal information, by interface a above-mentioned data is transmitted.
VDB receiver B2 receives the very high frequency(VHF) signal, and output strengthens data, comprises differential corrections data, integrity data, airport data and advances near section boat footpath data, by interface b above-mentioned data is transmitted.
MMR multimode rake receiver B3 receives gps signal and very high frequency(VHF) signal, output approach guidance information, comprise longitude, latitude, highly, VPL, LPL and boat footpath offset information, by interface c above-mentioned data are transmitted.
Integrity information evaluation module B41; receive the navigation observation data 1 of GNSS receiver B1 output and differential corrections data and the integrity data 5 that receive by VDB receiver B2; carry out the calculating of gps satellite integrity; and export vertical protection class VPL and horizontal protection class LPL; VPL, LPL are compared to check satellite integrity situation with vertical alarm grade VAL, horizontal alarm grade LAL respectively; the event information of statistics and record PL＞AL; generate integrity information and monitor result 11, the result is exported to performance synthesis assessment unit B5.
Differential performance evaluation module B42, receive the navigation observation data 2 of GNSS receiver B1 output and differential corrections data and the integrity data 6 that receive by VDB receiver B2, carry out the difference positioning calculation, positioning solution and known reference position are compared, the compute location precision, monitor whether bearing accuracy satisfies the accuracy requirement of a class precision approach: horizontal location precision＜16m, perpendicular positioning precision＜4m, generate differential performance and monitor result 12, the result is exported to performance synthesis assessment unit B5.
VDB signal monitoring module B44, the distributing data 20 that receives VDB receiver B2 output data 8 and sent by ground network by face system A externally, monitor the quality of current VDB signal, comprise signal power, transmission frequency, transmission time slot output, the statistics emission is interrupted, the rate of change of unwanted emission and signal power, while is according to time tag and the transmission time slot of distributing data, whether compare the data of launching on same time and the same time slot identical, mistake of statistics packets of information number, generate VDB signal monitoring result 15, the result is exported to performance synthesis assessment unit B5.
FAS data verification module B45, receive the FAS data 9 of VDB receiver B2 output, externally face system A is by the FAS data 21 of ground network transmission and the outside management and control centring system C FAS data 23 by the ground network transmission, FAS data 9, FAS data 21 and FAS data 23 are compared, relatively whether three's data are identical, monitor with this whether ground subsystem is correct by the FAS data of very high frequency(VHF) issue, and statistics anomalous event, generate FAS data monitoring result 16, the result is exported to performance synthesis assessment unit B5.
Data recordin module B46, receive the intermediate computations data 14 of VDB data 7, the performance synthesis assessment unit B5 output of navigation data 4, the VDB receiver B2 output of GNSS receiver B1 output, externally face system A by the ground network transmission data 19 and outside management and control centring system C by the data 22 of ground network transmission, record storage.
Performance synthesis assessment unit B5, integrity information according to above-mentioned acquisition monitors that result 11, differential performance monitor the approach guidance information 10 of result 12, VDB signal monitoring result 15, FAS data monitoring result 16 and MMR multimode rake receiver output B3, carry out analysis-by-synthesis, generate assessment result 24, then assessment result 24 is encapsulated in the data 25 by interface e, send to the management and control centring system through ground network, simultaneously intermediate computations data 14 are exported to data recordin module B46, the externally work information 17 of face system A of real time monitoring also is responsible in this unit simultaneously.
Reference receiver redundant module B43, be responsible for the fault restoration of ground subsystem, when if the performance synthesis assessment unit finds that reference receiver breaks down among the face system A externally number is greater than 2, the reference receiver redundant module is to GNSS receiver B1 application navigation observation data 3, and by data 13 it is transmitted to performance synthesis assessment unit B5, do as one likes can comprehensive assessment unit B 5 pass to interface d by data 18, export to externally face system A through generated data 31 after the packing by ground network, fault to outside ground subsystem A is repaired, guarantee that ground subsystem can normally move, data 3 herein, data 13 are identical with data 18.
Monitoring arrangement B releases news, to monitor that by ground network result 25 is transferred to outside management and control centring system C, outside management and control centring system C shows supervision result 25, warning content is carried out timely alarm, realize that local area strengthens the systematically Real Time Monitoring of face system A, guarantee accuracy, integrity, availability and the continuity of Local Area Augmentation System.The monitoring arrangement B that releases news is by the work information of real time monitoring ground subsystem A, when ground subsystem A reference receiver breaks down, the observation data of will navigating 31 sends to ground subsystem A, realization improves continuity and the availability of Local Area Augmentation System to the reparation of ground subsystem A receiver fault.
With reference to Fig. 4, the present invention be used for to monitor the release news method of performance of Local Area Augmentation System, comprises the steps:
Step 1, system interconnection.
With Local Area Augmentation System ground subsystem, management and control centring system and the performance monitoring device that releases news, connect by ground network, adopt the TCP/IP link to carry out data communication, the data communication between the assurance system is reliable and stable.
Step 2, the FAS data are broadcast at the management and control center.
The system manager crosses ground network with the FAS data communication device of setting and sends ground subsystem to and release news the performance monitoring device, and guarantee that the two paths of data that sends is identical by management and control centring system monitoring software.
Step 3, ground subsystem are broadcast the enhancing data.
Ground subsystem is with differential corrections data, integrity data, airport data and advance near section boat footpath data communication device and cross the VDB space channel and broadcast, be designated as Data1, should strengthen simultaneously data communication device and cross ground network and send to the performance monitoring device that releases news, be designated as Data2.
Step 4, comparison strengthens data.
The described VDB space channel data Data1 that the performance monitoring device that releases news will receive and the ground network data Data2 of reception compare, time tag and transmission time slot according to distributing data, whether compare the data of launching on same time and the same time slot identical, monitor at data field whether the data by the space channel issue exist unusually, each corresponding data item is numerically identical, the data that then show the space channel issue are normal, otherwise the data of space channel issue exist unusual; If data are normal, then enter the performance monitoring stage, if data exception then generates warning information, send to the management and control centring system by ground network and carry out alarm.
Step 5, performance monitoring.
The integrity information evaluation module receives the navigation data of GNSS receiver output and differential corrections data and the integrity data that receive by the VDB radio station, carry out the calculating of gps satellite integrity, and export vertical protection class VPL and horizontal protection class LPL, VPL, LPL are compared to check satellite integrity situation with vertical alarm grade VAL, horizontal alarm grade LAL respectively, the event information of statistics and record PL＞AL generates integrity information and monitors the result; The differential performance evaluation module receives the navigation data of GNSS receiver output and differential data and the integrity data that receive by the VDB radio station, carry out the difference positioning calculation, positioning solution and known reference position are compared, the compute location precision, monitor whether bearing accuracy satisfies the accuracy requirement of a class precision approach: if horizontal location precision＜16m, perpendicular positioning precision＜4m generates differential performance and monitors the result; The distributing data that VDB signal monitoring module receives VDB receiver output data and sent by ground network by ground subsystem, monitor the quality of current VDB signal, comprise the rate of change of signal power, transmission frequency, transmission time slot output, statistics emission interruption, unwanted emission and signal power, generate VDB signal monitoring result; FAS data verification module receives the FAS data of VDB receiver output, the FAS data that ground subsystem is transmitted by ground network by FAS data and the management and control center of ground network transmission, and relatively whether three's data are identical, monitor the correctness of the FAS data of VDB issue with this, and the statistics anomalous event, generate FAS data monitoring result.
Step 6 monitors as a result synthetic determination.
The protection class of MMR receiver output is designated as: VPL1 and LPL1, the protection class that the integrity information evaluation module calculates is designated as: VPL2 and LPL2, by VPL=Max (VPL1, VPL2), LPL=Max (LPL1, LPL2), calculate vertical protection class VPL and horizontal protection class LPL; Utilize the integrity information evaluation module to generate integrity information and monitor the result, the differential performance evaluation module generates differential performance and monitors the result, VDB signal monitoring module generates VDB signal monitoring result, FAS data verification module generates FAS data monitoring result, carry out analysis-by-synthesis: can't satisfy simultaneously horizontal location precision＜16m for bearing accuracy, during perpendicular positioning precision＜4m, then result of determination is that bearing accuracy is overproof; Can't satisfy simultaneously VPL＜VAL for the integrity data, during LPL＜LAL, then result of determination is for existing the integrity risk; Can't satisfy crash rate＜10 for the VDB data
-3Condition the time, then result of determination is the VDB data exception; When above-mentioned condition all satisfies, show that the information of ground subsystem issue is normal, generate normal information, otherwise generate warning information.
Step 7, the fault of reparation ground subsystem.
The work information of the performance monitoring device real time monitoring ground subsystem that releases news, if when finding that number that the ground subsystem reference receiver breaks down is greater than 2, by ground network earthward subsystem send the navigation observation data, fault to ground subsystem is repaired, and guarantees that ground subsystem can normally move.
As shown in Figure 5, the repair process in the inventive method may further comprise the steps:
The work information of 7a, the performance monitoring device real time monitoring ground subsystem that releases news;
During the receiver number that 7b, ground subsystem break down＞2, execution in step 7c, otherwise, execution in step 7a;
7c, the performance monitoring device that releases news send instruction to the GNSS receiver of its connection, and reference mode is set, and obtain the navigation observation datas such as pseudo range data, almanac data and almanac data, execution in step 7d;
7d, the performance monitoring device that releases news send to ground subsystem, execution in step 7e and 7f by the ground network observation data of will navigating;
7e, the performance monitoring device that releases news are reported form with state, and the apprizing system maintainer keeps in repair ground subsystem fault receiver;
The navigation observation data that 7f, ground subsystem adopt the performance monitoring device that releases news to send replaces the data of fault receiver, unites the navigation observation data of normal receiver, calculates differential corrections data and integrity data, execution in step 7g;
7g, ground subsystem cross VDB with differential corrections data and integrity data communication device and broadcast, and revert to the ability that aircraft provides the service of landing, execution in step 7a.
Step 8 monitors that the result reports the management and control centring system.
The performance monitoring device that releases news will monitor that the result sends the management and control center to through ground network, to realize real time monitoring and the abnormality alarming to releasing news.
In above-described embodiment, the processing procedure of whole supervision performance has improved the surveillance coverage of accuracy, integrity, continuity and the availability of local area enhancing system.By ground network ground subsystem, management and control centring system and the performance monitoring device that is connected are connected, realize the information interaction of three large systems, reduced the false dismissal probability of system, shortened the fault warning time.The performance monitoring device that releases news carries out Real-Time Monitoring to differential data and the integrity data of ground subsystem broadcasting, can find in time that differential data fault, VDB abnormal signal, FAS data fault etc. affect the key factor that aircraft advances nearly security.Simultaneously, the performance monitoring device that releases news provides fault correction function for Local Area Augmentation System ground subsystem reference receiver, improves the redundance of reference receiver, has effectively reduced the probability of Local Area Augmentation System generation service disruption.With respect to the local enhancement service system that does not possess the performance supervision ability that releases news, this technical scheme has more effectively improved accuracy, integrity, availability and the continuity of enhancement service.
Above embodiment only is used for technical scheme of the present invention is described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (6)
1. one kind be used for to monitor the release news device of performance of Local Area Augmentation System, comprises
The GNSS receiver: be used for receiving gps signal, output navigation observation data is processed to the monitor unit that releases news;
The VDB receiver: be used for receiving the VDB signal, the data of output Local Area Augmentation System issue are processed to the monitor unit that releases news;
The MMR multimode rake receiver: be used for the airborne user of emulation, output approach guidance information is carried out evaluation process to the performance synthesis assessment unit, described approach guidance information, comprise longitude, latitude, highly, FAS data, VPL, LPL and boat offset information directly;
Monitor unit releases news: be used for to collect data, and resolve, difference location, accuracy computation and accuracy comparison process, the monitoring data after processing is outputed to the performance synthesis assessment unit assesses;
Performance synthesis assessment unit: for the treatment of the result that respectively monitors module in the monitor unit that releases news, the data analysis of local area enhancing system issue is namely according to a class precision approach service request, horizontal location precision＜16m, perpendicular positioning precision＜4m, VDB data failure rate＜10
-3, VPL＜VAL, LPL＜LAL generates assessment result;
It is characterized in that: the monitor unit that releases news comprises:
Integrity information evaluation module: be used for carrying out the calculating of gps satellite integrity according to the relevant information of Local Area Augmentation System ground subsystem broadcasting, and export vertical protection class VPL and horizontal protection class LPL, VPL, LPL are compared to check satellite integrity situation with vertical alarm grade VAL, horizontal alarm grade LAL respectively, statistics and record VPL＞VAL, the event information of LPL＞LAL;
Differential performance evaluation module: be used for strengthening systematically the differential data of face system broadcasting according to GNSS navigation observation data and local and position and resolve, positioning solution and known reference position are compared, the compute location precision monitors whether bearing accuracy satisfies the accuracy requirement of a class precision approach;
The reference receiver redundant module: be used for repairing Local Area Augmentation System ground subsystem receiver fault, substitute the fault receiver, subsystem sends original GNSS navigation observation data earthward, calculates differential corrections data and integrity data;
VDB signal monitoring module: be used for monitoring the quality of current VDB signal, comprise signal power, transmission frequency, transmission time slot output, the rate of change of statistics emission interruption, unwanted emission, error message and signal power;
FAS data verification module: be used for and compare by the FAS data of ground network announcement by FAS data and the management and control centring system of ground network transmission by FAS data, ground subsystem that the ground subsystem that VDB receives is broadcasted, whether correct with these data that monitor the VDB issue, and the statistics anomalous event;
Data recordin module: be used for raw data that the record monitor unit receives, intermediate treatment data and finally statistics and result of calculation, with this foundation as later stage inquiry and statistics.
2. described for monitoring the release news device of performance of Local Area Augmentation System according to claim 1, wherein said navigation data comprises range finding source pseudorange, ephemeris, almanac and satellite clock correction.
3. described for monitoring the release news device of performance of Local Area Augmentation System according to claim 1, the data of wherein said Local Area Augmentation System issue comprise differential corrections data, integrity data, Airport information and FAS data.
4. described for monitoring the release news device of performance of Local Area Augmentation System according to claim 1, wherein said monitoring data comprises positioning result, accuracy data, FAS comparison data and integrity data.
5. one kind be used for to monitor the release news method of performance of Local Area Augmentation System, may further comprise the steps:
(1) Local Area Augmentation System ground subsystem, management and control centring system and the performance monitoring device that is connected are connected by ground network, adopt the TCP/IP link to carry out data communication;
(2) management and control centring system sends Final Approach section boat footpath data to ground subsystem and the performance monitoring device that releases news by ground network;
(3) ground subsystem is with differential corrections data, integrity data, airport data with advance near section boat footpath data communication device and cross the VDB space channel and broadcast, simultaneously these data communication devices are crossed ground network and send to the performance monitoring device that releases news, and work information is sent to release news performance monitoring device and management and control centring system by ground network;
(4) the release news described ground network data that the performance monitoring device will receive and described VDB space channel data that receive are compared, monitor at data field whether the data by the issue of VDB space channel exist unusually, if each corresponding data item is numerically identical, the data that then show the issue of VDB space channel are normal, otherwise the data of VDB space channel issue exist unusual;
(5) monitor by the data to the ground subsystem issue of integrity information evaluation module, differential performance evaluation module, VDB signal monitoring module and FAS data verification module in the performance monitoring device that releases news, obtain integrity information and monitor that result, differential performance monitor result, VDB signal monitoring result and FAS data monitoring result;
(6) utilize the integrity information evaluation module to generate integrity information and monitor the result, the differential performance evaluation module generates differential performance and monitors the result, VDB signal monitoring module generates VDB signal monitoring result, FAS data verification module generates FAS data monitoring result, the performance synthesis assessment unit carries out analysis-by-synthesis to above-mentioned supervision result, can't satisfy horizontal location precision＜16m for bearing accuracy, during the condition of perpendicular positioning precision＜4m, generate differential service alarm assessment result; Can't satisfy crash rate＜10 for the VDB data
-3Condition the time, generate VDB data alarm assessment result; Can't satisfy simultaneously VPL＜VAL for the integrity data, during LPL＜LAL, generate integrity alarm assessment result; Satisfy simultaneously horizontal location precision＜16m for bearing accuracy, VDB data and integrity data, perpendicular positioning precision＜4m, VDB data failure rate＜10
-3, when VPL＜VAL, LPL＜LAL condition, generate the normal assessment result of service;
(7) the release news work information of performance monitoring device real time monitoring ground subsystem, if when finding that number that the ground subsystem reference receiver breaks down is greater than 2, by terrestrial network earthward subsystem send observation data, fault to ground subsystem is repaired, and guarantees that ground subsystem can normally move;
(8) the performance monitoring device that releases news will monitor that the result sends the management and control centring system to through ground network, to realize real time monitoring and the abnormality alarming to releasing news.
6. according to claim 5 for monitoring the release news method of performance of Local Area Augmentation System, wherein the described fault to ground subsystem of step (7) is repaired, and carries out as follows:
(6a) the performance monitoring device that releases news sends instruction to the GNSS receiver of its connection, and reference mode is set, application pseudo range data, almanac data and almanac data, and these data communication devices are crossed terrestrial network send to ground subsystem;
(6b) ground subsystem adopts the observation data of the performance monitoring device transmission that releases news to replace the data of fault receiver, by DO-245 standard code method, calculates differential corrections data and integrity data;
(6c) ground subsystem is crossed VDB with differential corrections data and integrity data communication device and is broadcasted, reverting to aircraft provides the ability of the service of landing, the performance monitoring device that releases news is simultaneously reported form with state, and the apprizing system maintainer keeps in repair ground subsystem fault receiver;
(6d) release news reference receiver that the performance monitoring device monitors ground subsystem when all normal, stopping earthward, subsystem sends pseudo range data, almanac data and almanac data.
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| CN104049260B (en) * | 2014-06-18 | 2016-11-16 | 交通运输部水运科学研究所 | Enhancement Method based on coastal GNSS, Apparatus and system |
| CN104950320B (en) * | 2015-04-20 | 2021-06-22 | 中国电子科技集团公司第二十研究所 | Method and system for monitoring troposphere correction parameters of foundation enhancement system |
| CN104950308A (en) * | 2015-04-20 | 2015-09-30 | 中国电子科技集团公司第二十研究所 | Ground based augmentation performance long-term monitoring device |
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| CN109782303B (en) * | 2018-12-27 | 2021-01-12 | 中国电子科技集团公司第二十研究所 | Performance test method, device and system of foundation enhancement system |
| CN111913196A (en) * | 2019-05-09 | 2020-11-10 | 千寻位置网络有限公司 | GNSS equipment fault processing method and system thereof |
| CN110879403A (en) * | 2019-10-29 | 2020-03-13 | 中海北斗(深圳)导航技术有限公司 | Simple and feasible monitoring method and system for satellite-based augmentation system |
| CN110798855A (en) * | 2019-11-07 | 2020-02-14 | 交通运输部长江通信管理局 | Integrity monitoring system for realizing AIS differential data broadcasting system |
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