A GPS service performance precision release simulation and display system

Abstract

The present invention discloses a GPS service performance accurate release simulation and display system. The GPS navigation constellation simulation and display module completes the simulation of parameters such as orbital parameters, beam coverage, beam power, etc. of space satellites at any time, and displays them on a three-dimensional digital earth; the navigation satellite performance release control module completes the generation of satellite performance release control instructions such as beam adjustment and power enhancement according to the required navigation performance requirements; the ground receiving navigation signal situation display module completes the real-time simulation and situation display of the navigation signal strength and signal quality under the three-dimensional earth and two-dimensional map; the regional navigation service performance situation display module completes the real-time simulation and display of the ground navigation service accuracy and service quality in a specific area based on the three-dimensional real-life map. The present invention can complete the simulation and situation display of the GPS navigation satellite performance accurate release process on the three-dimensional digital ground, and visualize the new concept of navigation warfare tactics.

Description

Technical Field

[0001] The present invention belongs to the technical field of satellite navigation confrontation simulation and situation display, and in particular relates to a GPS service performance accurate release simulation and display system. Background Art

[0002] Satellite navigation systems can provide a unified time and space reference for systematic operations and are important battlefield support resources in joint operations. Satellite navigation confrontation has become an important part of intelligent warfare. One of the development trends of navigation confrontation scenarios is the precise release of navigation performance, heterogeneous backup of constellations, and global hotspot mobility. The main features are intelligent navigation signals and flexible theater reinforcement. Precise release of navigation performance means that navigation satellites can accurately release satellite navigation service performance in any area of ​​the world based on the navigation power enhancement needs and ground anti-interference needs of designated ground areas by adjusting the beam angle, scanning angle, and beam power of visible satellites at a certain moment.

[0003] In the current battlefield environment situation awareness system, the simulation of navigation confrontation mainly focuses on the simulation and visualization of space segment constellations, network segment links, ground segment ground stations and user segment reception. In view of the new development trend of navigation confrontation, the system without relevant situation expression simulates and visualizes the process of accurate release of navigation performance. In view of the characteristics of various types of entity elements involved in the accurate release of navigation performance, real-time dynamic changes in the positions of various elements, and complex and changeable surrounding environment, the present invention provides a GPS performance accurate release situation display system based on three-dimensional digital earth. Summary of the invention

[0004] In view of this, the present invention provides a GPS service performance precise release simulation and display system, which can solve the simulation and situation display problems of the satellite navigation service performance precise release process in the new navigation confrontation warfare method, and provide a situation display means for the battlefield environment protection of navigation warfare.

[0005] The technical solution for implementing the present invention is as follows:

[0006] A GPS service performance accurate release simulation and display system comprises a GPS navigation constellation simulation and display module, a service performance release control module, a ground navigation signal situation display module, and a regional navigation service performance situation display module.

[0007] The GPS navigation constellation simulation and display module completes the constellation layout and beam simulation of space navigation satellites, generates navigation parameter data at any time, and displays orbital parameters, beam angle, scanning angle, power, beam action area, coverage area, and spatial accuracy service performance on a three-dimensional digital globe.

[0008] The GPS navigation constellation simulation and display module mainly generates control instructions for satellite beam adjustment, power enhancement and other performance releases based on the required navigation performance requirements. The navigation performance requirements come from the user's needs for satellite navigation signal power enhancement and anti-ground interference in a specific time and designated area. Based on the area selection function of the three-dimensional digital area, the center point and range of the designated area are selected and the interference intensity simulation input is completed.

[0009] The ground-received navigation signal quality calculation and display module completes the real-time simulation and situation display of the equivalent carrier-to-noise ratio of the three-dimensional earth. Under the condition of accurate release of space satellite performance, the carrier-to-noise ratio of the signal received by the ground receiver is calculated and displayed in the form of a grid heat map on the three-dimensional digital earth.

[0010] The regional navigation service performance status display module is based on the three-dimensional real-life map, which completes the real-time simulation and display of ground navigation service accuracy and service quality in a specific area. The three-dimensional real-life map is imported as a local map on the digital area, and through spatial analysis, the navigation service performance is converted into DOP values ​​and projected on the real-life three-dimensional map, thereby obtaining the navigation service performance status in the specified area.

[0011] The present invention adopts C / S architecture to complete the situation display development on the digital earth.

[0012] Beneficial effects:

[0013] 1. The GPS performance implemented by the present invention is accurately released and is suitable for battlefield situation simulation and visualization work in navigation warfare.

[0014] 2. The present invention can simulate the precise release process of navigation constellation service performance on the basis of digital earth, and visualize the ground service performance status.

[0015] 3. The present invention can provide a situation display means for battlefield environment protection of navigation warfare in new navigation confrontation warfare methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the GPS performance accurate release situation display system based on three-dimensional digital earth of the present invention.

[0017] Figure 2 This is a basic flow chart for accurately releasing the GPS satellite performance of the present invention.

[0018] Figure 3 The task decomposition diagram of the GPS performance accurate release situation display of the present invention.

[0019] Figure 4 This is a typical symbol schematic diagram of the GPS performance accuracy release of the present invention. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] The present invention provides a GPS service performance accurate release simulation and display system, and the specific implementation steps include:

[0022] See also Figure 1 As shown, the business process of the present invention is that the user first determines the area that needs navigation elastic service at a certain time and the performance value that needs to be enhanced. Taking GPS M code as an example, the system simulates and calculates the time T. The specified area (assuming the center is P(X, Y) and the radius is R) needs a power enhancement of 15DB. Then, the visible satellites in the area at time T are first calculated, and the performance is accurately released using the satellites. The geocentric angle covered by the satellite beam is simulated. The specific formula is:

[0023]

[0024] where η max It is called the scanning angle of the spot beam signal, and α is the signal half-beam angle.

[0025] From a space perspective, satellite constellations and beams are displayed on the digital earth to show beam coverage.

[0026] The ground receiving navigation signal quality calculation and display module simulates and calculates the quality of the ground receiving navigation signal under the new service performance parameters, expressed in equivalent carrier-to-noise ratio. The specific calculation formula is

[0027]

[0028] The service accuracy of the landing signal is calculated by simulation, expressed by DOP value and specific calculation formula. Then, from the ground perspective, the grid map of the ground DOP is projected onto the real-life three-dimensional map loaded by the digital earth to express the situation of precise release of navigation performance. The time axis can be used to trace back the entire process of precise release of navigation performance from satellites, beams, and all ground elements.

[0029] See also Figure 2As shown, an embodiment of the present invention provides a GPS performance accurate release situation display system based on a three-dimensional digital earth, including a GPS navigation constellation simulation and display module, a service performance release control module, a ground navigation signal situation display module, and a regional navigation service performance situation display module. The GPS navigation constellation simulation and display module completes the constellation layout and beam simulation of the space navigation satellite, and generates navigation parameter data at any time; the service performance release control module mainly completes the generation of satellite beam adjustment, power enhancement and other performance release control instructions based on the required navigation performance requirements. The ground received navigation signal quality calculation and display module completes the real-time simulation and situation display of the three-dimensional earth equivalent carrier-to-noise ratio. The regional navigation service performance situation display module completes the real-time simulation and display of the ground navigation service accuracy and service quality in a specific area based on the three-dimensional real-life map.

[0030] It should be noted that the present invention has made a detailed task analysis for the situation display of the navigation precision release scene, see the attached Figure 3 , for the satellite navigation precision release scenario, according to business needs, 1. Decompose it into 3 detailed display scenarios: 1) Satellite beam enhancement; 2) Satellite beam adjustment; 3) Ground precision service performance. For the above detailed scenarios, establish visualization elements and decompose the scene scale. 2. Involving navigation satellite constellations, satellite beams, ground monitoring stations, ground monitoring stations, geographical environment, etc. 3. Determine the expression scale, determine 3 expression scales and display elements from the spatial perspective and the ground perspective, and use the standard Fuhao library of the three-dimensional digital earth to symbolize the expression elements.

[0031] The schematic diagram of the scene expressed by the four modules involved in the present invention is attached. Figure 4 As shown, the spatial perspective expresses the satellite's orbit and beam, and the ground perspective expresses the ground coverage and the grid projection of the DOP value in the real three-dimensional scene.

[0032] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A GPS service performance accurate release simulation and display system, characterized in that: It includes GPS navigation constellation simulation and display module, service performance release control module, ground navigation signal quality calculation and display module, and regional navigation service performance situation display module; The GPS navigation constellation simulation and display module completes the constellation layout and beam state simulation of space navigation satellites, and generates navigation state parameter data at any time; The service performance release control module completes the generation of performance release control instructions for satellite beam adjustment and power enhancement according to the required navigation performance requirements; in the service performance release control module, the navigation performance requirements come from the user's requirements for satellite navigation signal power enhancement and anti-ground interference in a specific time and designated area. Based on the area selection function of the three-dimensional digital area, the center point and range of the designated area are selected and the interference intensity simulation input is completed; The ground receiving navigation signal quality calculation and display module completes the real-time calculation and situation display of the equivalent carrier-to-noise ratio of the ground receiving signal in the specified area; The regional navigation service performance status display module is based on a three-dimensional real-life map to complete real-time simulation and display of ground navigation service accuracy and service quality in a specific area.

2. The GPS service performance accurate release simulation and display system as claimed in claim 1, characterized in that: The GPS navigation constellation simulation and display module displays orbit parameters, beam angle, scanning angle, power, beam action area, coverage area, and spatial accuracy service performance on a three-dimensional digital globe.

3. The GPS service performance accurate release simulation and display system as claimed in claim 1, characterized in that: In the ground-received navigation signal quality calculation and display module, under the condition of precise release of space satellite performance, the carrier-to-noise ratio of the signal received by the ground receiver is calculated and displayed on the three-dimensional digital earth in the form of a grid heat map.

4. The GPS service performance accurate release simulation and display system as claimed in claim 3, characterized in that: In the regional navigation service performance status display module, the three-dimensional real-life map is imported as a local map on the digital area. Through spatial analysis, the navigation service performance is converted into DOP values ​​and projected on the real-life three-dimensional map to obtain the navigation service performance status in the specified area.

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