CN214585997U

CN214585997U - Global satellite navigation system-based GBAS and SBAS fusion system

Info

Publication number: CN214585997U
Application number: CN202120551584.7U
Authority: CN
Inventors: 张清江; 赵龙; 陶成钢
Original assignee: Harbin Tianshu Technology Co ltd
Current assignee: Harbin Tianshu Technology Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-11-02
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a GBAS and SBAS fusion system based on global satellite navigation system, fusion system includes ground reference receiver, ground center processing station, very high frequency equipment, uploads injection site, ground data chain network. The utility model discloses a fuse the system and carry out ground end integration with current GBAS and SBAS system, make it can provide GBAS and SBAS service simultaneously, can be used for providing the precision navigation positioning and the integrity service of ground reinforcing and star-based reinforcing in GNSS reinforcing system. The utility model has the advantages of as follows: the ground terminal fuses the GBAS system and the SBAS system, so that the practicability is high; the cost for respectively laying the GBAS and the SBAS is effectively reduced, and the purpose of economy is met; the method adopts a mode of fusing GBAS and SBAS at the ground end, and provides two optional enhancement modes of GBAS and SBAS for a user by using a set of equipment, thereby being more practical.

Description

Global satellite navigation system-based GBAS and SBAS fusion system

Technical Field

The utility model belongs to the technical field of satellite navigation, a GBAS and SBAS fusion system based on global navigation satellite system is related to.

Background

In recent years, with the development of aviation industry, the improvement of navigation positioning accuracy and integrity level is more and more emphasized by aviation department. Foreign scholars and institutions first put forward ground-based augmentation systems (GBAS) and satellite-based augmentation systems (SBAS), and planned research trials. The system is mainly used for providing precise navigation positioning and integrity service and ensuring the precision, continuity, integrity and availability of user navigation positioning.

The GBAS transmits FAS Data, correction values, integrity signals, and navigation Data generated by the ground information processing apparatus to the user by means of very high frequency Data broadcasting (VHF Data Broadcast), with an action range of 23 nautical miles. The SBAS is used as a wide area differential enhancement system, a large number of reference stations (with known positions) with extremely wide distribution monitor and preprocess a navigation satellite, then information is transmitted to a central processing station through a ground communication network, the central processing station performs a series of calculation corrections including satellite ephemeris error correction, satellite clock error correction, ionosphere correction and the like, and then the information is transmitted to a geostationary satellite (GEO) through an uplink injection station, and finally the GEO satellite broadcasts the correction information to a large number of users, thereby achieving the purpose of improving the positioning accuracy.

However, currently, GBAS and SBAS belong to different systems, and each device is deployed and operated independently. Thus, resources are wasted, and unified management is not facilitated. With the deep development of the research of the Beidou satellite in China, reports related to theories and methods related to the GBAS and SBAS fusion operation are not found at home and abroad at present, and the GBAS and SBAS fusion technology is believed to have wider application space in the near future.

Disclosure of Invention

In order to solve because GBAS and SBAS independent operation lead to with high costs, the difficult, the inconvenient problem of management of arranging the station, the utility model provides a GBAS and SBAS fuses system based on global satellite navigation system. The fusion system integrates the ground terminal of the existing GBAS and SBAS systems, so that the fusion system can simultaneously provide GBAS and SBAS services and can be used for providing precise navigation positioning and integrity services of ground-based augmentation and satellite-based augmentation in a GNSS augmentation system.

The utility model aims at realizing through the following technical scheme:

a global satellite navigation system-based GBAS and SBAS fusion system comprises a ground reference receiver, a ground central processing station, a very high frequency device, an uploading injection station and a ground data link network, wherein:

the ground reference receiver is used for receiving satellite data in an observation range, calculating an ionospheric delay value of a GNSS satellite in a visual range in real time, calculating longitude and latitude of a penetration point of the GNSS satellite on an ionospheric reference surface at the same time, and transmitting the ionospheric delay value to the ground central processing station in real time through a ground data link network;

the ground central processing station is used for receiving the information preliminarily processed by the ground reference receiver, calculating the ionosphere delay value of each grid node on the ionosphere reference surface in the vertical incidence direction, further giving out differential correction information and integrity information, generating a message according to a certain format, and transmitting the message to a large number of users in the area by the synchronous communication satellite through the uploading injection station;

the very high frequency equipment is used for sending the differential correction information and the integrity information to the airborne subsystem and monitoring the integrity of each item of data;

the uploading injection station is used for transmitting the information processed by the ground central processing station to the synchronous communication satellite through recoding;

the ground data link network is used for connecting the ground reference receiver, the ground central processing station and the uploading injection station together to realize the transmission and sharing of data.

Compared with the prior art, the utility model has the advantages of as follows:

(1) the ground terminal fuses the GBAS system and the SBAS system, so that the practicability is high;

(2) the cost for respectively laying the GBAS and the SBAS is effectively reduced, and the purpose of economy is met;

(3) the method adopts a mode of fusing GBAS and SBAS at the ground end, and provides two optional enhancement modes of GBAS and SBAS for a user by using a set of equipment, thereby being more practical.

Drawings

Fig. 1 is a schematic spatial layout diagram of a global satellite navigation system-based GBAS and SBAS fusion system, in which: the system comprises a 1-ground reference receiver, a 2-ground central processing station, a 3-very high frequency device, a 4-uploading injection station, a 5-ground data link network, a 6-ground reference station system and a 7-user.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention are included in the protection scope of the present invention without departing from the spirit and scope of the technical solution of the present invention.

The utility model provides a GBAS and SBAS fusion system based on global satellite navigation system, its basic thought is: the GBAS and the SBAS are simultaneously provided by fusing the ground terminal of the GBAS and the ground terminal of the SBAS. As shown in fig. 1, the GBAS and SBAS fusion system includes a ground reference receiver (with known location) 1, a ground central processing station 2, a very high frequency device 3, an upload injection station 4, and a ground data link network 5, wherein:

the number of the ground reference receivers 1 is several, and the ground reference receivers are used for receiving satellite data in an observation range, calculating ionospheric delay values of GNSS satellites in a visual range in real time, calculating longitude and latitude of penetration points of the GNSS satellites on an ionospheric reference surface at the same time, and transmitting the longitude and latitude to a ground central processing station 4 in real time through a ground data link network 5;

the number of the ground central processing stations 2 is at least one, and the ground central processing stations are used for receiving information preliminarily processed by the ground reference receiver 1, calculating an ionosphere delay value of each grid node on an ionosphere reference surface in the vertical incidence direction, further giving out differential correction information and integrity information, generating a telegraph text according to a certain format, and transmitting the telegraph text to a large number of users in the area through the synchronous communication satellite by uploading the injection station 4;

the number of the very high frequency devices 3 is at least one, and the very high frequency devices are used for sending the differential correction information and the integrity information to the airborne subsystem and monitoring the integrity of each item of data;

the number of the uploading injection stations 4 is at least one, and the uploading injection stations are used for transmitting the information processed by the ground central processing station 2 to a synchronous communication satellite through recoding;

the ground data link network 5 is used for connecting the ground reference receiver 1, the ground central processing station 2 and the uploading injection station 4 together to realize the transmission and sharing of data.

The utility model discloses in, Global Navigation Satellite System (GNSS) includes GPS of the United states, the GLONASS of Russia, the BDS of China, the Galileo system of the European Union and all navigation positioning systems that other countries are under construction or will be constructed. The user group is not limited to airplane users, but also comprises all users which can use enhancement systems such as GBAS or SBAS in the future.

The utility model discloses in, GBAS and SBAS system fusion method's concrete implementation step is as follows:

the method comprises the following steps: the traditional GBAS equipment and SBAS equipment are fused into a set of equipment, and ground reference receivers which simultaneously receive GBAS signals and SBAS signals are arranged around an airport so as to ensure that the GBAS system is met in the local area aspect; the wide area (among all airports) aspect meets the requirements of the SBAS system.

Step two: building an uploading injection station to serve the SBAS system; and laying the very high frequency equipment for the GBAS system. A ground central processing station which can simultaneously process two sets of systems (GBAS and SBAS) is constructed, and the operation of the two sets of systems can be efficiently, quickly and noiselessly performed.

Step three: all the devices at the ground end are gathered together through a ground data link network, and information transmission among the devices is achieved.

The GBAS comprises the following specific implementation steps:

the method comprises the following steps: the ground reference receiver receives the broadcasted navigation positioning data by observing the satellites of a Global Navigation Satellite System (GNSS), and the ground central processing station performs differential correction processing on the related data.

Step two: the ground subsystem sends the differential correction information and the integrity information to the airborne subsystem through the very high frequency broadcasting equipment, and integrity monitoring is carried out on all data.

Step three: when the airplane cruises and approaches, the airborne subsystem carries out high-precision differential positioning and protection-level calculation by receiving navigation positioning data, differential correction data and integrity parameters broadcasted by the satellite subsystem and the ground subsystem, so that the requirements on the aspects of navigation positioning precision, integrity, availability and continuity are improved, and the PBN technology is further realized.

The SBAS comprises the following specific implementation steps:

the method comprises the following steps: the ground reference receiver is responsible for receiving satellite data in an observation range, wherein the satellite data comprises satellite ephemeris, clock information, troposphere atmosphere information, ionosphere information and the like. The ground reference receiver can calculate the ionospheric delay value of the GNSS satellite in the visual range in real time, and simultaneously calculate the longitude and latitude of the penetration point of the GNSS satellite on the ionospheric reference surface, and the data are transmitted to the ground central processing station in real time through a ground data link network.

Step two: the ground central processing station receives the information preliminarily processed by the ground reference receiver, and simultaneously calculates the ionosphere delay value of each grid node on the ionosphere reference surface in the vertical incidence direction, further provides differential information and integrity information, generates telegraph text according to a certain format, and forwards the telegraph text to vast users in the area through the synchronous communication satellite.

Step three: the uploading injection station is responsible for transmitting the information processed by the ground central processing station to the satellite through recoding.

Step four: the ground data link network is responsible for connecting a plurality of ground reference receivers, at least one ground central processing station and at least one uploading injection station together to realize data transmission and sharing.

Claims

1. A global satellite navigation system-based GBAS and SBAS fusion system is characterized in that the fusion system comprises a ground reference receiver, a ground central processing station, a very high frequency device, an uploading injection station and a ground data link network, wherein:

2. The global satellite navigation system based GBAS and SBAS convergence system of claim 1, wherein the number of ground reference receivers is several.

3. The global satellite navigation system based GBAS and SBAS fusion system of claim 1 wherein the number of ground based central processing stations is at least one.

4. The global satellite navigation system based GBAS and SBAS fusion system according to claim 1, wherein the number of said vhf devices is at least one.

5. The global satellite navigation system based GBAS and SBAS fusion system of claim 1 wherein the number of uploading injection stations is at least one.