Monitoring satellite autonomous screening method and system for multi-antenna cooperative monitoring of low earth orbit satellites

Abstract

The invention provides a monitoring satellite autonomous screening method and system for multi-antenna cooperative monitoring of low earth orbit satellites, and belongs to the field of low earth orbit satellite monitoring. The invention aims to solve the problems that a downlink service signal cannot be monitored, the monitoring range is relatively small and the monitoring effect is poor when a satellite is monitored by adopting a single antenna. Compared with an existing monitoring satellite screening method, actual monitoring scenes and monitoring rules are fully considered, the monitoring duration of the same satellite and the monitoring information and data of the same satellite under different radiation off-axis angles are increased, the probability of monitoring downlink service signals of the low-orbit satellites is improved, the monitored satellites are graded, and the monitoring efficiency is improved. A basis is provided for subsequent research, and more comprehensive data support is provided for analysis of low-orbit satellite signals.

Description

Technical Field

[0001] The present invention relates to the technical field of low-orbit satellite monitoring, and in particular to a method and system for autonomously screening monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas. Background Art

[0002] At present, the common method for monitoring low-orbit satellites is to use a monitoring antenna to select satellites in its visible area (monitoring elevation angle greater than a certain threshold), and track and monitor one satellite in the visible area each time. However, this method has two shortcomings. First, the selection of tracking satellites is relatively blind. The monitoring antenna tracks low-orbit satellites that appear in its visible area, but the satellites in the visible area are not necessarily communicating with its terminal or gateway, that is, their downlink service signals may not be monitored. Second, it does not meet the application scenarios and needs of multi-antenna collaborative monitoring. Multi-antenna collaborative monitoring can increase the monitoring time of the same satellite, and at the same time obtain monitoring information and data of the same satellite at different radiation off-axis angles. However, when selecting tracking satellites, single-antenna monitoring only considers the visible area of ​​the antenna, and does not consider the visibility of other antennas. Summary of the invention

[0003] The technical problems to be solved by the present invention are:

[0004] In order to solve the problem that using a single antenna to monitor a satellite may not be able to monitor its downlink business signal, and the monitoring range is relatively small, resulting in poor monitoring effect.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] The present invention provides a method for autonomously screening monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas, comprising the following steps:

[0007] S100, configuring a monitoring period for a multi-antenna collaborative monitoring task;

[0008] S200, configuring monitoring positions of multiple monitoring antennas;

[0009] S300, selecting the ephemeris of the low-orbit satellite to be monitored, and calculating the satellite monitoring parameters of the low-orbit satellite for the monitoring satellite screening conditions of multiple monitoring antennas respectively;

[0010] S400, configuring antenna monitoring parameters of different monitoring antennas relative to the satellite screening conditions monitored in step S300;

[0011] S500, obtaining a list of satellites that can be monitored by different monitoring antennas according to the configured screening conditions;

[0012] S600, for satellites that can be collaboratively monitored by multiple monitoring antennas, divide them into satellites that can be collaboratively monitored by multiple monitoring antennas at the same time and satellites that can be collaboratively monitored by multiple monitoring antennas in a time-sharing manner;

[0013] S700, prioritizing the satellites that can be monitored simultaneously in step S600;

[0014] S800, configure the satellite tracking strategy, and combine the priority of the monitored satellites. Each monitoring antenna tracks and monitors the satellites in the monitorable list.

[0015] Further, in step S200, the monitoring position of the i-th monitoring antenna is set to L i( Lon i ,Lat i ,H i) , Lon i ,Lat i ,H i are the longitude, latitude and altitude of the i-th monitoring antenna location respectively.

[0016] Furthermore, in step S300, the satellite monitoring parameters include the overpass time, overpass pitch angle, azimuth angle, monitoring distance, monitorable time period and running direction of the low-orbit satellite for multiple monitoring antennas respectively.

[0017] Furthermore, in step S400, the antenna monitoring parameters include the minimum monitoring elevation angle of the monitoring antenna, the shortest monitoring time, the longest monitoring distance, the minimum communication elevation angle of the satellite gateway / terminal, and the satellite's ascending and descending orbit.

[0018] Further, in step S600, for satellites that appear in the list of monitorable satellites of multiple monitoring antennas and whose passing times with the multiple monitoring antennas overlap, they are satellites that can be monitored simultaneously by the multiple monitoring antennas; for satellites that appear in the list of monitorable satellites of multiple monitoring antennas and whose passing times with the multiple monitoring antennas do not overlap, they are satellites that can be monitored collaboratively by the multiple monitoring antennas in a time-sharing manner.

[0019] Further, in step S700, the highest monitoring priority A is set for satellites that can be monitored collaboratively at the same time, the second highest monitoring priority B is set for satellites that can be monitored collaboratively in different time periods, and the priority of the remaining monitorable satellites is C.

[0020] A monitoring satellite autonomous screening system for multi-antenna collaborative monitoring of low-orbit satellites, the system has program modules corresponding to the above steps, and executes the steps in the above monitoring satellite autonomous screening method for multi-antenna collaborative monitoring of low-orbit satellites during operation.

[0021] A computer-readable storage medium stores a computer program, wherein the computer program is configured to implement the steps of a method for autonomously screening monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas when called by a processor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention discloses an autonomous screening method and system for monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas. Compared with the existing screening method for monitoring satellites, the system fully considers the actual monitoring scenarios and monitoring rules, increases the monitoring time of the same satellite, and increases the monitoring information and data of the same satellite at different radiation off-axis angles, thereby increasing the probability of monitoring downlink service signals of low-orbit satellites, and classifies the monitored satellites, thereby providing a basis for subsequent research and providing more comprehensive data support for the analysis of low-orbit satellite signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a scenario of simultaneous collaborative monitoring by multiple antennas in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a scenario of multi-antenna time-sharing collaborative monitoring in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of satellite screening for collaborative monitoring by multiple antennas in an embodiment of the present invention;

[0027] Figure 4 The present invention is a flowchart of a method for autonomously screening monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] When screening monitoring satellites, the following two aspects need to be noted:

[0030] First, for the screening of trackable satellites for a single monitoring antenna, in order to monitor the downlink service signals of low-orbit satellites with a higher probability, multi-dimensional screening conditions are considered. (1) Monitoring elevation angle: The monitoring satellite must be located within the satellite's monitorable area. If there are mountains, buildings, etc. near the monitoring location, the monitorable elevation angle will be larger and the monitorable area will be smaller; (2) Terminal or gateway communication angle: When the satellite is located within the monitorable area of ​​the monitoring antenna, it must also be located within the communication area of ​​its terminal or gateway. Only then can the satellite establish a link with its terminal or gateway, and the monitoring antenna can monitor the satellite's downlink service signals; (3) Monitoring distance: When the monitoring distance is short, the carrier-to-noise ratio of the monitored signal is higher and the signal quality is better; (4) Monitoring duration: When the low-orbit satellite takes a longer time to pass the monitoring antenna, the probability of receiving a longer service signal is higher; (5) Satellite elevation orbit: There is a certain regularity between the direction of the satellite's movement when the monitoring antenna passes the top and whether it is establishing a link.

[0031] Second, for the screening of trackable satellites for collaborative monitoring by multiple monitoring antennas, when multiple monitoring antennas are deployed close to each other and their monitorable areas overlap, the satellites that appear in the overlapping areas can be monitored collaboratively at the same time. Figure 1 When multiple monitoring antennas are deployed far apart, the monitoring areas of the multiple monitoring antennas do not overlap, but satellites can pass through different monitoring antennas at different times, so the same satellite can be monitored in a time-sharing coordinated manner, as shown in the attached figure. Figure 2 shown.

[0032] Specific implementation plan 1: Combine Figures 1 to 4 As shown, the present invention provides a method for autonomously screening monitoring satellites for collaboratively monitoring low-orbit satellites using multiple antennas, comprising the following steps:

[0033] S100, configuring a monitoring period for a multi-antenna collaborative monitoring task;

[0034] S200, configuring the monitoring positions of multiple monitoring antennas, such as the monitoring position of the i-th monitoring antenna is L i( Lon i ,Lat i ,H i) , Lon i ,Lat i ,H i are the longitude, latitude and altitude of the i-th monitoring antenna location respectively;

[0035] S300, selecting the ephemeris of the low-orbit satellite to be monitored, and calculating the overpass time, overpass elevation angle, azimuth angle, monitoring distance, monitorable time period, and running direction of the low-orbit satellite for multiple monitoring antennas respectively;

[0036] S400, configure the minimum monitoring elevation angle, the shortest monitoring time, the longest monitoring distance, the minimum communication elevation angle of the satellite gateway / terminal, and the monitoring satellite screening conditions of the satellite ascending and descending orbits of different monitoring antennas;

[0037] S500, obtaining a list of satellites that can be monitored by different monitoring antennas according to the configured screening conditions;

[0038] S600, calculate the satellites that can be monitored collaboratively by multiple monitoring antennas. If a satellite appears in the list of satellites that can be monitored by the multiple monitoring antennas and has overlapping over-the-air times for the multiple monitoring antennas, it is a satellite that can be monitored collaboratively by the multiple monitoring antennas at the same time; if a satellite appears in the list of satellites that can be monitored by the multiple monitoring antennas and has no overlapping over-the-air times for the multiple monitoring antennas, it is a satellite that can be monitored collaboratively by the multiple monitoring antennas in a time-sharing manner;

[0039] S700, setting the highest monitoring priority A for satellites that can be monitored simultaneously, setting the second highest monitoring priority B for satellites that can be monitored in time-sharing collaboration, and setting the priority of other monitorable satellites to C, and obtaining a list of monitorable satellites for each monitoring antenna and the monitoring priority of each monitoring satellite;

[0040] S800, configure the satellite tracking strategy, and combine the priority of the monitored satellites. Each monitoring antenna tracks and monitors the satellites in the monitorable list.

[0041] The other combinations and connection relationships of this embodiment are the same as those of the first embodiment.

[0042] experiment

[0043] S100. The monitoring period for configuring the multi-antenna collaborative monitoring task is from 10:00:00 on January 15, 2025 to 12:00:00 on January 15, 2025;

[0044] S200, configuring the monitoring positions of multiple monitoring antennas, such as the monitoring position of the first monitoring antenna is Shenzhen (114.5°E, 22.6°N, 24.9m), the monitoring position of the second monitoring antenna is Xiamen (117.5°E, 24.4°N, 30m), and the monitoring position of the third monitoring antenna is Qingdao (120.4°E, 36.1°N, 25m);

[0045] S300, select the ephemeris of the Starlink satellite, and deduce and calculate the overpass time, overpass pitch angle, azimuth angle, monitoring distance, monitorable period, and running direction of the low-orbit satellite for multiple monitoring antennas;

[0046] S400, the minimum monitoring elevation angle of the Shenzhen monitoring antenna is 15°, the shortest monitoring time is 10 seconds, the longest monitoring distance is 1200Km, the terminal is located in Taiwan Province, China, the terminal can communicate with the faith angle of 25°, and the satellite operation direction is configured as ascending orbit; the minimum monitoring elevation angle of the Xiamen monitoring antenna is 15°, the shortest monitoring time is 10 seconds, the longest monitoring distance is 1200Km, the terminal is located in Taiwan Province, China, the terminal can communicate with the faith angle of 25°, and the satellite operation direction is configured as ascending orbit; the minimum monitoring elevation angle of the Qingdao monitoring antenna is 25°, the shortest monitoring time is 5 seconds, the longest monitoring distance is 1000Km, the terminal is located in Japan, the terminal can communicate with the faith angle of 25°, and the satellite operation direction is configured as ascending orbit;

[0047] S500. According to the configured screening conditions, the list of satellites that can be monitored by the Shenzhen monitoring antenna is obtained as follows:

[0048]

[0049] The list of satellites that can be monitored by Xiamen monitoring antenna is as follows:

[0050]

[0051] The list of satellites that can be monitored by Qingdao monitoring antenna is as follows:

[0052]

[0053] Step 6: Shenzhen monitoring antenna and Xiamen monitoring antenna can conduct simultaneous collaborative monitoring of Starlink-5244 from 10:18:23 on January 15, 2025 to 10:21:32 on January 15, 2025. Shenzhen monitoring antenna and Qingdao monitoring antenna can conduct time-sharing collaborative monitoring of Starlink-5373 from 10:42:17 on January 15, 2025 to 10:47:22 on January 15, 2025 and from 11:08:53 on January 15, 2025 to 11:13:26 on January 15, 2025.

[0054] Step 7: Set the monitoring priority of Starlink-5244 to A, the monitoring priority of Starlink-5373 to B, and the monitoring priority of other satellites to C. The list of satellites that can be monitored by the Shenzhen monitoring antenna is:

[0055]

[0056] The list of satellites that can be monitored by Xiamen monitoring antenna is as follows:

[0057]

[0058] The list of satellites that can be monitored by Qingdao monitoring antenna is as follows:

[0059]

[0060] Step 8: Configure the satellite tracking strategy. Combined with the priority of the monitored satellites, each monitoring antenna tracks and monitors the satellites in the monitorable list.

[0061] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for autonomously screening monitoring satellites for collaborative monitoring of low-orbit satellites using multiple antennas, characterized in that: The following steps are involved: S100, configuring a monitoring period for a multi-antenna collaborative monitoring task; S200, configuring monitoring positions of multiple monitoring antennas; S300, selecting the ephemeris of the low-orbit satellite to be monitored, and calculating the satellite monitoring parameters of the low-orbit satellite for the monitoring satellite screening conditions of multiple monitoring antennas respectively; S400, configuring antenna monitoring parameters of different monitoring antennas relative to the satellite screening conditions monitored in step S300; S500, obtaining a list of satellites that can be monitored by different monitoring antennas according to the configured screening conditions; S600, for satellites that can be collaboratively monitored by multiple monitoring antennas, divide them into satellites that can be collaboratively monitored by multiple monitoring antennas at the same time and satellites that can be collaboratively monitored by multiple monitoring antennas in a time-sharing manner; S700, prioritizing the satellites that can be monitored simultaneously in step S600; S800, configure the satellite tracking strategy, and combine the priority of the monitored satellites. Each monitoring antenna tracks and monitors the satellites in the monitorable list.

2. The method for autonomously screening monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to claim 1, characterized in that: In step S200, the monitoring position of the i-th monitoring antenna is set to L i (Lon i ,Lat i ,H i ), Lon i ,Lat i ,H i are the longitude, latitude and altitude of the i-th monitoring antenna position respectively.

3. The method for autonomously screening monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to claim 2, characterized in that: In step S300, the satellite monitoring parameters include the overpass time, overpass pitch angle, azimuth angle, monitoring distance, monitorable time period and running direction of the low-orbit satellite for multiple monitoring antennas respectively.

4. The method for autonomously screening monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to claim 3, characterized in that: In step S400, the antenna monitoring parameters include the minimum monitoring elevation angle of the monitoring antenna, the shortest monitoring time, the longest monitoring distance, the minimum communication elevation angle of the satellite gateway / terminal, and the satellite's ascending and descending orbit.

5. The method for autonomously screening monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to claim 4, characterized in that: In step S600, for satellites that appear in the list of monitorable satellites of multiple monitoring antennas and whose passing times with the multiple monitoring antennas overlap, they are satellites that can be monitored simultaneously by the multiple monitoring antennas; for satellites that appear in the list of monitorable satellites of multiple monitoring antennas and whose passing times with the multiple monitoring antennas do not overlap, they are satellites that can be monitored collaboratively by the multiple monitoring antennas in a time-sharing manner.

6. The method for autonomously screening monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to claim 5, characterized in that: In step S700, the highest monitoring priority A is set for satellites that can be monitored collaboratively at the same time, the second highest monitoring priority B is set for satellites that can be monitored collaboratively in different time periods, and the priority of the remaining monitorable satellites is C.

7. A monitoring satellite autonomous screening system for multi-antenna collaborative monitoring of low-orbit satellites, characterized by: The system has a program module corresponding to the steps of any one of claims 1 to 6 above, and executes the steps in the above-mentioned autonomous screening method for monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites when running.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is configured to implement the steps of the autonomous screening method for monitoring satellites for multi-antenna collaborative monitoring of low-orbit satellites according to any one of claims 1 to 6 when called by a processor.

Images