CN113933862A - Enhanced GBAS system based on joint positioning of pseudolite and Beidou satellite - Google Patents
Enhanced GBAS system based on joint positioning of pseudolite and Beidou satellite Download PDFInfo
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- CN113933862A CN113933862A CN202111257146.0A CN202111257146A CN113933862A CN 113933862 A CN113933862 A CN 113933862A CN 202111257146 A CN202111257146 A CN 202111257146A CN 113933862 A CN113933862 A CN 113933862A
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- subsystem
- pseudolite
- beidou satellite
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- satellite
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- 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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/10—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
- G01S19/11—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
- G01S19/115—Airborne or satellite based pseudolites or repeaters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
Abstract
The invention discloses an enhanced GBAS system based on combined positioning of a pseudolite and a Beidou satellite, which comprises a pseudolite system, a ground subsystem and an airborne subsystem.
Description
Technical Field
The invention belongs to the technical field of satellite navigation, and relates to an enhanced GBAS system based on combined positioning of a pseudolite and a Beidou satellite.
Background
Ground augmentation system (GBAS) is a new generation of approach by the international civil aviation organization in light of further requirements for future navigation performance. Design and guarantee standards such as DO-245A, 246D (hardware standard) and DO-178B/DO-278 (software standard) established by the technical committee of radio technology for aviation (RTCA) provide technical theoretical support for the research and development and design of GBAS.
In recent years, research and development and verification experiments of ground-based augmentation systems are vigorously promoted in many countries, and the ground-based augmentation systems are intended to replace traditional Instrument Landing Systems (ILS) in the future and become a main guidance mode for aircraft landing. The GBAS is added with a series of integrity monitoring algorithms on the basis of improving the positioning accuracy based on a differential positioning algorithm, and improves performance indexes such as accuracy, continuity, integrity, availability and the like. With the further promotion of RNP at home and abroad and the acceleration of the global networking progress of the Beidou system (BDS) independently developed in China, the GBAS based on the BD provides better service for the precision approach of civil aircrafts in China.
When satellite signals are influenced by external factors, the number of satellites cannot meet the positioning requirement, and the conditions of incapability of positioning calculation or discontinuous signals are caused. The continuity of the Beidou constellation navigation signal is one of important factors influencing the performance of the GBAS. In order to improve the navigation positioning precision of the GBAS, a pseudolite and Beidou cooperative positioning reason wheel is provided. When the external navigation signal is poor, the accuracy factor can be improved by adding the pseudo satellite with fixed azimuth angle and elevation angle when the available satellite for positioning is less, and meanwhile, the integrity monitoring performance can be effectively improved.
A pseudolite system (PSS) is an important supplement to a navigation satellite, and can effectively improve the geometric distribution of the satellite and improve the positioning accuracy. Along with the improvement of navigation positioning precision, the integrity of the system is further enhanced, so that good precondition is created for realizing the precise approaching service of GBAS CAT class II and above.
The BD/pseudo satellite positioning is similar to the BD positioning algorithm principle, and the PSS is a simple navigation satellite system which is located near an airport in principle, has the GNSS navigation satellite function and is fixed in position. Generally, the PSS signal source has a lower elevation angle, so that the PSS signal source is arranged around an airport in a planned way, can be combined with a GNSS, enhances the spatial geometrical distribution of a navigation system, and effectively improves the navigation and positioning capacity.
Disclosure of Invention
In order to effectively improve the navigation and positioning capacity, the invention provides an enhanced GBAS system based on the combined positioning of a pseudolite and a Beidou satellite.
The purpose of the invention is realized by the following technical scheme:
an enhanced GBAS system based on joint positioning of a pseudolite and a Beidou satellite comprises a pseudolite system, a ground subsystem and an airborne subsystem, wherein:
the ground subsystem comprises a reference receiver, a ground central processing station and a very high frequency communication device, wherein the reference receiver observes a Beidou satellite subsystem of a Global Navigation Satellite System (GNSS), receives navigation positioning data broadcast by the Beidou satellite subsystem, performs differential correction processing and integrity monitoring on the data by the ground central processing station, and then transmits the processed data to the airborne subsystem through the very high frequency communication device; the reference receiver simultaneously receives the navigation positioning data transmitted by the pseudo satellite system, and when the number of the Beidou system satellites is insufficient, the received navigation positioning data transmitted by the pseudo satellite system is added into the received satellite signals for differential correction processing and integrity monitoring;
the airborne subsystem is used for receiving navigation positioning data, differential correction data and integrity parameters broadcast by the Beidou satellite subsystem, the pseudolite subsystem and the ground subsystem, and performing high-precision differential positioning and protection-level calculation, so that the requirements on the aspects of navigation positioning precision, integrity, availability and continuity are improved, and the PBN technology is further realized.
According to the invention, when the external navigation signal is poor, and the number of available satellites capable of being used for positioning is small, the accuracy factor can be improved by increasing the pseudolite signals with fixed azimuth angles and elevation angles, and meanwhile, the integrity monitoring performance is effectively improved.
Compared with the prior art, the invention has the following advantages:
when navigation information is weak, the GNSS satellite is assisted and positioned through the ground-based pseudo satellite technology, the precision of the GNSS satellite can be improved, the consistency monitoring performance and the vertical protection level performance of multiple reference machines of the integrity of the GNSS satellite are improved, the GNSS satellite meets the requirement of a precision-approaching risk index, and the continuity and the availability of a system are improved.
Drawings
Fig. 1 is a simplified structure diagram of an enhanced GBAS system for joint positioning of a pseudolite and a Beidou satellite.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The invention provides an enhanced GBAS system based on combined positioning of a pseudolite and a Beidou satellite, as shown in figure 1, the system comprises a pseudolite system, a ground subsystem and an airborne subsystem, wherein:
the ground subsystem comprises a reference receiver, a ground central processing station and a very high frequency communication device;
the reference receiver comprises a navigation receiver and a receiver antenna which are arranged on the ground, and is used for receiving Beidou satellite signals transmitted by a Beidou satellite subsystem of a Global Navigation Satellite System (GNSS) and transmitting the Beidou satellite signals to a ground central processing station to finish the acquisition work of navigation positioning data and simultaneously receive the navigation positioning data transmitted by a pseudolite system;
the ground central processing station is used for processing navigation positioning data from different reference station navigation receivers, completing differential correction processing of related data and processing integrity parameters such as consistency detection of multiple reference receivers;
the very high frequency communication equipment is used for data transmission between the ground subsystem and the airborne subsystem and sending data processed by the ground central processing station to the airborne subsystem;
the airborne subsystem (user end system) is arranged on an airplane and comprises an antenna and an airborne receiver, when the airplane cruises and approaches, the airborne subsystem receives navigation positioning data, differential correction data and integrity parameters which are broadcast by a Beidou satellite subsystem, a pseudolite system and a ground subsystem through the antenna, and high-precision differential positioning and protection level calculation are carried out, so that the requirements on navigation positioning precision, integrity, availability and continuity are improved, and the PBN technology is further realized.
Claims (3)
1. An enhanced GBAS system based on joint positioning of a pseudolite and a Beidou satellite is characterized by comprising a pseudolite system, a ground subsystem and an airborne subsystem, wherein:
the ground subsystem comprises a reference receiver, a ground central processing station and a very high frequency communication device, the reference receiver receives navigation positioning data broadcast by the Beidou satellite subsystem, the ground central processing station performs differential correction processing and integrity monitoring on the data, and then the processed data is sent to the airborne subsystem through the very high frequency communication device; the reference receiver simultaneously receives the navigation positioning data transmitted by the pseudo satellite system, and when the number of satellites of the Beidou satellite subsystem is insufficient, the received navigation positioning data transmitted by the pseudo satellite system is added into the received satellite signals for differential correction processing and integrity monitoring;
the airborne subsystem is used for receiving navigation positioning data, differential correction data and integrity parameters broadcast by the Beidou satellite subsystem, the pseudolite subsystem and the ground subsystem, and performing high-precision differential positioning and protection-level calculation, so that the requirements on the aspects of navigation positioning precision, integrity, availability and continuity are improved, and the PBN technology is further realized.
2. The enhanced GBAS system based on the combined positioning of the pseudolite and the Beidou satellite as claimed in claim 1, wherein the reference receiver comprises a navigation receiver and a receiver antenna arranged on the ground for receiving the Beidou satellite signals transmitted by the Beidou satellite subsystem and transmitting the Beidou satellite signals to a ground central processing station to complete the acquisition of the navigation positioning data and simultaneously receive the navigation positioning data transmitted by the pseudolite system, when the number of the Beidou system satellites is insufficient, the received navigation positioning data transmitted by the pseudolite system is added to the received satellite signals to perform differential correction processing and integrity monitoring, and when the number of the Beidou satellites is sufficient, the received data of the pseudolite is used as backup data.
3. The enhanced GBAS system based on the combined positioning of the pseudolite and the Beidou satellite according to claim 1, wherein the airborne subsystem is installed on an airplane and comprises an antenna and an airborne receiver, and when the airplane cruises and approaches, the airborne subsystem receives navigation positioning data, differential correction data and integrity parameters broadcasted by the Beidou satellite subsystem, the pseudolite system and the ground subsystem through the antenna and performs high-precision differential positioning and protection level calculation, so that the requirements on the aspects of navigation positioning precision, integrity, availability and continuity are improved, and the PBN technology is further realized.
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| CN202111257146.0A CN113933862A (en) | 2021-10-27 | 2021-10-27 | Enhanced GBAS system based on joint positioning of pseudolite and Beidou satellite |
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| CN202111257146.0A CN113933862A (en) | 2021-10-27 | 2021-10-27 | Enhanced GBAS system based on joint positioning of pseudolite and Beidou satellite |
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| CN108132474A (en) * | 2017-11-24 | 2018-06-08 | 中国科学院光电研究院 | A kind of signal detecting method for overcoming time-division ground enhancing signal near-far interference |
| CN109581430A (en) * | 2018-12-13 | 2019-04-05 | 中国电子科技集团公司第五十四研究所 | A kind of monitoring method of the ionosphere the GBAS spatial gradient based on pseudo satellite, pseudolite |
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2021
- 2021-10-27 CN CN202111257146.0A patent/CN113933862A/en not_active Withdrawn
Patent Citations (7)
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|---|---|---|---|---|
| US20040133341A1 (en) * | 2002-10-01 | 2004-07-08 | Spriggs Timothy John | Autonomous vehicle guidance on or near airports |
| US20120208557A1 (en) * | 2009-10-19 | 2012-08-16 | Carter Robert A | Location Reliability Determination |
| US20120326923A1 (en) * | 2011-06-10 | 2012-12-27 | Astrium Gmbh | Near Field Navigation System |
| CN105866802A (en) * | 2016-03-24 | 2016-08-17 | 北京航空航天大学 | Method and device for monitoring delay integrity of troposphere |
| CN106873001A (en) * | 2016-12-22 | 2017-06-20 | 北京航空航天大学 | GBAS ground system distribution methods |
| CN108132474A (en) * | 2017-11-24 | 2018-06-08 | 中国科学院光电研究院 | A kind of signal detecting method for overcoming time-division ground enhancing signal near-far interference |
| CN109581430A (en) * | 2018-12-13 | 2019-04-05 | 中国电子科技集团公司第五十四研究所 | A kind of monitoring method of the ionosphere the GBAS spatial gradient based on pseudo satellite, pseudolite |
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Application publication date: 20220114 |