Cooperative guidance working method for low-orbit satellites

Abstract

According to the low-orbit satellite cooperative working method provided by the invention, the guidance information is received and transmitted through the high-orbit satellites, so that cooperative guidance work is realized. And the low-orbit satellite is used as a guide satellite to execute an observation task and generate guide information according to an on-satellite strategy. When the guide satellite enters the coverage range of the high-orbit routing satellite, the two satellites establish a link, and meanwhile, the guide satellite sends guide information to the routing satellite through the guide antenna. And the routing satellite stores, fuses and forwards the guiding information to the guided low-orbit satellite. And when the guided satellite enters the coverage area of the routing satellite, the two satellites establish a link, the guided satellite receives and analyzes the guide information, carries out task planning, executes an observation task in a target area and downloads task data to the ground for ground analysis and interpretation, so that one-time cooperative work is completed. According to the method provided by the invention, manual intervention is not needed in the cooperative guidance task, so that the requirements on ground data transmission and measurement and control resources are greatly reduced, and meanwhile, the timeliness and success rate of the task are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of satellite system engineering, and particularly relates to a method for a low-earth orbit satellite to complete cooperative guidance work by receiving and transmitting guidance information through a geostationary orbit satellite. Background Art

[0002] Satellite patrol observation is one of the most common mission modes of satellites. Satellites can complete observations of areas within the coverage range, which is a commonly used census method. Low-earth orbit satellites have the characteristics of short revisit periods, high observation accuracy, a large number of constellations, low transmission delays, small link losses, and diverse functions. However, a single satellite has a small instantaneous ground coverage area, a short regional observation time, and scattered operations, making it difficult to communicate and cooperate. Geostationary orbit satellites are stationary relative to the ground, and a single satellite has a large instantaneous ground coverage area, which is conducive to providing services for fixed areas and can establish and maintain communication connections with satellites within the coverage area. The cooperative work of satellites is a new application mode of satellite system engineering, which can make full use of the advantages of satellites at different orbital altitudes and study how low-earth orbit satellites use geostationary orbit satellites to cooperate efficiently.

[0003] Currently, low-earth orbit satellites usually plan tasks based on their own orbits and observation areas. However, multiple low-earth orbit satellites usually operate dispersedly and cannot directly communicate through inter-satellite links. The traditional cooperative guidance work of multiple low-earth orbit satellites requires manual intervention. First, a low-earth orbit satellite needs to be arranged to perform an observation task, and the task data is transmitted to the ground through data transmission resources. Then, the task data is manually processed, and after analyzing and interpreting the data manually, information such as key areas to be observed is analyzed, and the observation areas, working modes, etc. of the guided low-earth orbit satellites are planned. Then, the planned guidance tasks are uploaded to the guided satellites through temporary tracking and control passes. After the guided satellites complete the observation tasks, the guidance task data is transmitted to the ground for ground analysis of remote sensing data, thus completing a cooperative task. This traditional cooperative guidance method requires sufficient resources such as manual labor, data transmission, and emergency tracking and control systems. The working time is often as long as several hours, and the task timeliness is poor and the success rate is low. Summary of the Invention

[0004] To overcome the deficiencies of the prior art, the present invention proposes a method for cooperative guidance of low-earth orbit satellites, which uses a geostationary orbit satellite for cooperative guidance to improve the efficiency of guidance tasks. The present invention uses a geostationary orbit satellite to receive and transmit guidance information to realize the cooperative guidance work of multiple low-earth orbit satellites. This method can make full use of the characteristics of high- and low-earth orbit satellites. The instantaneous coverage area of a geostationary orbit satellite is large, and the coverage position is relatively fixed. Combining with the advantages of strong observation ability and short regional revisit period of low-earth orbit satellites, guidance information can be processed and generated quickly in real time on the satellite during the task, and the guidance information is received and transmitted in real time through the on-satellite guidance antenna without the intervention of manual labor, data transmission, and ground tracking and control systems, realizing the autonomous cooperation and guidance of multiple low-earth orbit satellites.

[0005] The present application provides a method for low-orbit satellite collaborative operation, including the following steps:

[0006] S1: Upload the working parameters required for the collaborative task to the low-orbit satellites participating in the collaborative task in the low-orbit constellation;

[0007] S2: Use the low-orbit satellite performing the observation task as the guiding satellite, perform on-board processing on the remote sensing data obtained after the observation task, and package the processing results to generate a guiding planning package;

[0008] S3: Use the high-orbit satellite as the routing satellite. When the guiding satellite passes through the coverage area of the routing satellite, the guiding satellite sends the guiding planning package to the routing satellite. After the guiding planning package is sent, the guiding satellite disconnects from the routing satellite;

[0009] S4: The routing satellite stores the guiding information in the guiding planning package, fuses multiple pieces of guiding information, performs task planning and conflict resolution, and generates a guiding fusion package;

[0010] S5: Use the low-orbit satellite that receives the guiding information and performs the guiding task as the guided satellite. When the guided satellite passes through the coverage area of the routing satellite, the routing satellite sends the guiding fusion package to the guided satellite. After the guiding fusion package is sent, the routing satellite disconnects from the guided satellite;

[0011] S6: After receiving the guiding fusion package, the guided satellite performs the observation task according to the guiding content.

[0012] According to the method provided by an embodiment of the present application, it further includes step S7: After the observation task is completed, the guided satellite downloads the remote sensing data to the ground for comprehensive analysis by ground users to complete the collaborative task.

[0013] According to the method provided by an embodiment of the present application, in step S1, among the uploaded working parameters, the code names of the low-orbit satellites participating in the collaborative task are unique.

[0014] According to the method provided by an embodiment of the present application, in step S2, the guiding information in the guiding planning package has a pre-agreed format protocol, and the guiding information includes: the total number of target areas to be guided, the area longitude and latitude, priority, and valid time of each target area; the code name of the guided satellite.

[0015] According to the method provided by an embodiment of the present application, in step S3:

[0016] When multiple low-orbit satellites are simultaneously in the coverage area of the routing satellite and waiting to establish a link, select the low-orbit satellite with a higher priority to establish a link;

[0017] If the priorities of the low-orbit satellites are the same, select the one with an earlier link establishment time to establish a link;

[0018] During the linking process, it will no longer respond to other low-earth orbit satellites until the link establishment is exited and the distribution of this guidance information is completed.

[0019] According to the method provided by an embodiment of the present application, in step S4, the routing satellite receives and stores multiple copies of guidance information from multiple guiding satellites, fuses the guiding target areas that are still within the valid time, eliminates the guiding target areas that exceed the valid time, and iteratively updates at a certain time interval.

[0020] According to the method provided by an embodiment of the present application, in step S4,

[0021] When the routing satellite distributes the guidance information to the guided satellite, it sorts according to the code name of the guided satellite;

[0022] When the number of stored guiding target areas is greater than the storage quantity M of the routing satellite, the routing satellite sorts according to the priority of the guiding target areas, and only retains the information of the M guiding target areas with the highest priority, and eliminates the information of other guiding target areas.

[0023] According to the method provided by an embodiment of the present application, in step S6,

[0024] When the number of target areas to be observed in the guidance information is greater than the maximum number T of observable targets in a single mission of the guided satellite, only the top T target areas with the highest priority are planned for tasks, and other target areas are eliminated;

[0025] If there is a conflict between the on-ground upload task to be executed by the guided satellite and the guidance task, the on-ground upload task has a higher priority, and the execution of the guidance task is abandoned.

[0026] According to the method provided by an embodiment of the present application, in step S1, the working parameters include:

[0027] Orbit parameters, including the orbit parameters of the guiding satellite, the routing satellite, and the guided satellite;

[0028] Satellite code name;

[0029] Satellite priority.

[0030] According to the method provided by an embodiment of the present application,

[0031] The guiding satellite and the routing satellite establish a link through the guiding antenna on the guiding satellite;

[0032] The guided satellite and the routing satellite establish a link through the guiding antenna on the guided satellite.

[0033] The advantages of the present invention compared with the prior art are:

[0034] (1) A method for realizing the collaborative guidance of multiple low-orbit satellites by using high-orbit satellites to forward guidance information makes full use of the advantages of satellites in different orbits, enabling low-orbit satellites to conduct high-frequency and high-quality observations of key areas. Moreover, multiple low-orbit satellites can have different functions and can observe key areas from multiple dimensions such as optics, communication, navigation, and remote sensing, greatly enhancing the observation ability.

[0035] (2) Through the established on-board strategy, the present invention autonomously processes data and quickly generates guidance information. The satellites participating in the collaboration directly parse the guidance information according to the agreed protocol without transmitting the mission data to the ground for manual analysis, reducing the demand for ground data transmission resources, reducing the time delay of manual data analysis, and improving the timeliness and flexibility of the mission.

[0036] (3) By using the method of inter-satellite antenna communication to transmit and receive guidance information between satellites in different orbits, the present invention does not require manual intervention or the cooperation of the ground TT&C system, reducing the demand for human and ground system resources. The collaborative task takes less time and has high timeliness, improving the efficiency of the guidance collaboration task and the utilization rate of inter-satellite resources.

[0037] (4) The high-orbit routing satellite participating in the collaborative guidance task has the ability to store guidance information and perform fusion processing of guidance information. It continuously updates and iterates the guidance information according to the strategy to ensure the maximization of task efficiency. It can also distribute guidance data to multiple low-orbit satellites to achieve multi-satellite collaboration and information sharing, significantly improving the mission success rate and enabling it to be carried out as a regular task. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a flowchart of the method for collaborative operation of low-orbit satellites of the present invention;

[0039] Figure 2 is a schematic diagram of the collaborative operation of low-orbit satellites. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The present application proposes a method for collaborative operation of low-orbit satellites. As shown in Figure 2, the low-orbit satellites generate guidance information and transmit and receive the guidance information through high-orbit satellites (routing satellites). The guided satellites plan and cooperate according to the received guidance information. The low-orbit collaborative operation method is applicable to low-orbit satellites with a large number of constellations but scattered operations, providing an efficient collaborative working mode for low-orbit constellations. It can guide satellites with various functions such as optics, communication, navigation, and remote sensing to cooperate and conduct multi-dimensional high-quality observations of the area, and can operate as a regular mode.

[0041] As Figure 1 shown, the specific working steps of the method for collaborative guidance operation of low-orbit satellites proposed in the present application include:

[0042] S1: Upload the working parameters required for the collaborative mission to the LEO satellites participating in the collaborative mission in the LEO constellation, specifically including:

[0043] Before the collaborative mission, upload the working parameters required for the collaborative mission to the LEO satellites participating in the collaborative mission in the LEO constellation (in subsequent collaborative missions, these LEO satellites will serve as guiding satellites or guided satellites according to actual working needs) through the ground TT&C channel. The working parameters include: orbital parameters, including the orbital parameters of the guiding satellite, routing satellite, and guided satellite; satellite codes; satellite priorities.

[0044] S2: Use the LEO satellite performing the observation mission as the guiding satellite to perform on-board processing of the remote sensing data obtained after the observation mission, and package the processing results to generate guiding information, specifically including:

[0045] According to the tasks and instructions pre-planned and uploaded from the ground, use the LEO satellite that performs the observation mission and obtains remote sensing data as the guiding satellite to perform the observation mission and obtain remote sensing data according to the uploaded observation mode, perform on-board rapid processing of the remote sensing data obtained from the observation mission according to the established strategy, and package the processing results to generate a guiding plan package. The guiding information packaged and sent by the guiding satellite to the routing satellite is defined as the guiding plan package;

[0046] S3: Use the GEO satellite as the routing satellite. When the guiding satellite passes through the coverage area of the routing satellite, the guiding satellite sends the guiding plan package to the routing satellite. After the guiding plan package is sent, the guiding satellite disconnects from the routing satellite, specifically including:

[0047] Use the GEO satellite as the routing satellite to collect and distribute guiding information in the collaborative mission. The guiding antenna of the routing satellite is usually in the on state. When the guiding satellite passes through the coverage area of the routing satellite, the guiding antenna terminal of the guiding satellite is powered on, and the guiding antenna pointing is calculated based on the orbital parameter information of both the guiding satellite and the routing satellite. After the guiding antenna pointing and tracking functions are normal, a link is established between the guiding satellite and the routing satellite. After the link is successfully established, the guiding satellite sends guiding information to the routing satellite through the guiding antenna. After the guiding information is sent, the guiding satellite sends a disconnection instruction to the routing satellite, and the two disconnect, and the guiding antenna terminal of the guiding satellite is powered off.

[0048] S4: The routing satellite fuses multiple copies of guiding information, performs mission planning and conflict resolution, and generates a guiding fusion package, specifically including:

[0049] After receiving the guiding plan package, the routing satellite parses and stores the guiding plan package, and extracts the guiding information therein. The routing satellite can receive and store multiple copies of guiding information from multiple guiding satellites. The routing satellite fuses multiple copies of guiding information according to the established on-board strategy, and performs tasks such as mission planning and conflict resolution, and generates a guiding fusion package.

[0050] S5: The low-earth orbit satellite that receives the guiding information and executes the guiding task serves as the guided satellite. When the guided satellite passes through the coverage area of the routing satellite, the routing satellite sends a guiding fusion packet to the guided satellite. After the guiding fusion packet is sent, the routing satellite disconnects from the guided satellite. Specifically, it includes:

[0051] The low-earth orbit satellite that receives the guiding information and executes the guiding task serves as the guided satellite. When a certain guided satellite passes through the coverage area of the routing satellite, the guiding antenna terminal of the guided satellite powers on. The routing satellite and the guided satellite calculate the pointing of the guiding antenna of the guided satellite according to the orbital parameter information of both satellites. After the guiding antenna pointing and tracking functions are normal, the two satellites of the guided satellite and the routing satellite start to shake hands to establish a link. After the link establishment is successful, the routing satellite sends guiding fusion packet data to the guided satellite through the guiding antenna of the guided satellite. After the guiding fusion packet of the routing satellite is sent, a disconnection command will be issued, and the two will disconnect, and the guiding antenna terminal of the guided satellite will power off.

[0052] S6: After receiving the guiding fusion packet, the guided satellite executes the observation task according to the guiding content. Specifically, it includes:

[0053] After receiving the guiding fusion packet, the guided satellite analyzes the guiding data, adjusts the observation area and working mode according to the analyzed guiding content, independently conducts task planning, and executes the observation task for the key areas in the guiding information.

[0054] S7: After the observation task is completed, the guided satellite downloads the remote sensing data to the ground for comprehensive analysis by ground users to complete the collaborative task.

[0055] In step S1 of the present invention, the satellite code participating in the collaborative task in the injection working parameters must be uniquely fixed and cannot be repeated.

[0056] In step S2 of the present invention, the satellites participating in the collaborative task need to agree in advance on the format protocol of the guiding information. The guiding information includes: the total number of target areas to be guided; the longitude, latitude, altitude, priority, and valid time of each target area; the code of the guided satellite; other important parameter information, etc.

[0057] The frame protocol example of the specific guiding information is as follows. The low-earth orbit guiding satellite only sends a guiding planning packet to the high-earth orbit routing satellite once. The guiding planning packet is sent according to the actual number of target areas, and at most contains 255 target area information. Each frame of the guiding planning packet can contain the description information of 10 target areas, that is, the single guiding planning packet can contain at most 26 frames of data. The guiding planning packet is sent one frame per second through the guiding antenna and can guide at most 50 low-earth orbit satellites.

[0058] This bootstrapping planning packet protocol can be flexibly adjusted according to the application scenario.

[0059]

[0060]

[0061] In step S3 of the present invention, when multiple low-orbit satellites are simultaneously in the coverage area of the high-orbit routing satellite and waiting to establish a link, conflict resolution is performed according to the priorities of the low-orbit satellites, that is, the low-orbit satellite with a higher priority is selected to establish a link. If the priorities of the conflicting low-orbit satellites are the same, the one with an earlier link establishment time is selected to establish a link. During the link period, no response is given to other low-orbit satellites until the link establishment is exited, and this bootstrapping information distribution is ended. The priorities of the satellites to be bootstrapped should be reasonably set to maximize the efficiency of the bootstrapping task.

[0062] In step S4 of the present invention, the routing satellite can receive and store multiple copies of bootstrapping information from multiple bootstrapping satellites, fuse the bootstrapping target areas that are still within the valid time, resolve the bootstrapping target areas that exceed the valid time, and perform iterative updates every minute.

[0063] When the routing satellite distributes bootstrapping information to the satellites to be bootstrapped, the bootstrapping information is sorted according to the codes of the satellites to be bootstrapped, that is, only the observation target area information required by the currently connected satellites to be bootstrapped is distributed.

[0064] When the number of stored bootstrapping target areas is greater than the storage capacity M of the routing satellite, the routing satellite sorts them according to the priorities of the bootstrapping target areas, and only retains the information of the M bootstrapping target areas with the highest priorities, and resolves the information of other bootstrapping target areas.

[0065] When the routing satellite distributes bootstrapping information to the satellites to be bootstrapped, the bootstrapping information is sorted according to the target satellite codes of the satellites to be bootstrapped, that is, only the observation target area information required by the currently connected satellites to be bootstrapped is selected to form bootstrapping fusion packet data and distributed. The protocol example of the bootstrapping fusion packet frame is as follows, and this protocol can be flexibly adjusted according to the application scenario.

[0066]

[0067]

[0068] In step S6 of the present invention, since the duration of a single observation mission of the guided satellite is limited, that is, the number of key target areas that can be observed in a single mission is limited, and the maximum number of observable target areas in a single mission of the guided satellite is T. When the number of target areas to be observed in the guidance information is greater than T, the mission planning is reserved for the top T target areas with the highest priority, and the target areas after priority T are resolved. If there is a conflict between the on-ground upload mission to be executed by the guided satellite and the guidance mission, the on-ground upload mission has a higher priority and the guidance mission cannot be executed.

[0069] Low-Earth orbit satellites in the cooperative mission all have the capabilities of performing observation missions, quickly processing data on the satellite, generating and transmitting guidance information. They can plan and implement the cooperative mission according to the guidance information and can cooperate with or initiate the cooperative mission.

[0070] According to a specific embodiment of the present application, a method for cooperative guidance of multiple low-Earth orbit satellites through a high-Earth orbit satellite is provided. The specific steps and strategies are as follows:

[0071] S1: Satellite G is a high-Earth orbit routing satellite located in the geostationary orbit with a relatively fixed coverage area on the Earth. Low-Earth orbit satellites A, B, C, D, and E fly in series in the same orbital plane with a phase spacing of 20 minutes. Before the guidance work, the orbital parameter information of the satellites participating in the cooperative guidance needs to be uploaded to satellites A to E. The number of each satellite is unique.

[0072] S2: Satellite A is a low-Earth orbit guiding satellite, and satellites B, C, D, and E are low-Earth orbit guided satellites. Satellite A completes the Earth observation according to the mission uploaded on the ground, and quickly processes it on the satellite to generate guidance information. The guidance information includes the longitude and latitude information, the priority of the area, and the effective time of 10 important observation areas. The priorities of target areas 1 to 6 are 1, and the priorities of 7 to 10 are 2. The smaller the priority value, the higher the target priority, and the effective time of its observation target area is 40 minutes. The guidance planning package also includes the codes of the guided satellites, that is, satellite codes B, C, D, and E.

[0073] S3: When the guiding satellite A flies through the coverage area of the routing satellite G, the guiding antenna of the guiding satellite A is turned on. Satellite A and G calculate the pointing of the guiding antenna using the orbital parameter information of both satellites. After the antenna pointing and tracking functions are normal, satellite A and G start to establish a link. After the link is successfully established, the guiding satellite A will send the guidance information to the routing satellite G through the guiding antenna.

[0074] S4: After receiving the guidance information, routing satellite G will store and fuse the guidance information. There are already 20 pieces of guidance target area information stored in the guidance module of G. Among them, the priorities of target areas 11-20 are 4, and the priorities of target areas 21-30 are 3. The guided satellites corresponding to this guidance information are C, D, and E, and the remaining valid time is 24 hours. Since the processing resources of G are limited and it can store at most 20 pieces of information about guidance area targets, G will sort them according to the priorities of the target areas and only retain the top 20 target areas with the highest priorities. Then G will retain target areas 1-10 and 21-30, a total of 20 target areas.

[0075] S5: When the guided satellite B flies over the coverage range of G, the guidance antenna terminal of B is powered on and establishes a link with routing satellite G, and G distributes the guidance information to B. Since target areas 21-30 are not applicable to the guided satellite B, B will only receive the guidance fusion packet containing the information of target areas 1-10 generated by guiding satellite A after being fused by routing satellite G, and will plan tasks according to the guidance information to generate the corresponding working mode. When flying over these 10 target areas, key observations will be carried out, and the task data will be downlinked after the observations to complete the cooperative guidance task.

[0076] S6: When the guided satellite C flies over the coverage range of G, G sends the guidance data to the guided satellite C, that is, the guidance data packet containing all 20 target areas. There are already other observation tasks uploaded on the ground on the guided satellite C, and there are conflicts with the areas of the guidance task, and conflict resolution is required. Usually, the priority of the tasks uploaded on the ground is higher, so the guided satellite C will execute the tasks uploaded on the ground and cannot execute the current guidance task.

[0077] S7: When the guided satellite D flies over the coverage range of G, at this time, the 40-minute valid time of target areas 1-10 generated by guiding satellite A has passed, and G will resolve the invalid guidance information and only retain the information of target areas 21-30 that are still within the valid time. G sends the information of target areas 21-30 of D to the guided satellite D, and D will plan tasks for these 10 areas, that is, when D flies over these 10 target areas, observations will be carried out on them, and the task data will be downlinked after the observations to complete the cooperative guidance task.

[0078] S8: When the guided satellite E flies over the coverage range of G, G sends the guidance data to the guided satellite E. Similar to D, the guidance information received by E contains the information of target areas 21-30. However, the observation ability of E is limited and it can observe at most 6 targets. Then E will plan tasks for the target areas 1-6 with the best priorities and resolve the target areas 7-10. After carrying out the observation task, the task data will be downlinked to complete the cooperative guidance task.

[0079] It should be understood that although this specification is described in accordance with various embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The content not described in detail in this invention specification belongs to the well-known technology of those skilled in the art.

[0080] The above description is only a schematic specific implementation manner of the present application, and is not intended to limit the scope of the present application. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of protection of the present application.

Claims

1. A method for low-earth orbit satellite collaborative operation, comprising the following steps: S1: Upload the working parameters required for the collaborative task to the low-earth orbit satellites participating in the collaborative task in the low-earth orbit constellation; S2: Use the low-earth orbit satellite performing the observation task as the guiding satellite, perform on-board processing on the remote sensing data obtained after the observation task, and package the processing results to generate a guiding planning package; S3: Use the high-earth orbit satellite as the routing satellite. When the guiding satellite passes through the coverage area of the routing satellite, the guiding satellite sends the guiding planning package to the routing satellite. After the guiding planning package is sent, the guiding satellite disconnects from the routing satellite; S4: The routing satellite stores the guiding information in the guiding planning package, fuses multiple pieces of guiding information, performs task planning and conflict resolution, and generates a guiding fusion package; S5: Use the low-earth orbit satellite that receives the guiding information and performs the guiding task as the guided satellite. When the guided satellite passes through the coverage area of the routing satellite, the routing satellite sends the guiding fusion package to the guided satellite. After the guiding fusion package is sent, the routing satellite disconnects from the guided satellite; S6: After receiving the guiding fusion package, the guided satellite performs the observation task according to the guiding content.

2. The method according to claim 1, further comprising step S7: After the observation task is completed, the guided satellite downloads the remote sensing data to the ground for comprehensive analysis by ground users to complete the collaborative task.

3. The method according to claim 1, wherein in step S1, among the uploaded working parameters, the code names of the low-earth orbit satellites participating in the collaborative task are unique.

4. The method according to claim 1, wherein in step S2, the guiding information in the guiding planning package has a pre-agreed format protocol, and the guiding information includes: The total number of guided target areas, the area longitude and latitude, priority, and valid time of each target area; The code name of the guided satellite.

5. The method according to claim 1, wherein in step S3: When multiple low-earth orbit satellites are simultaneously in the coverage area of the routing satellite and waiting to establish a link, select the low-earth orbit satellite with a higher priority to establish a link; If the priorities of the low-earth orbit satellites are the same, select the one with an earlier link establishment time to establish a link; During the link period, it will no longer respond to other low-earth orbit satellites until it exits the link establishment and ends the distribution of the current guiding information.

6. The method according to claim 1, wherein in step S4, the routing satellite receives and stores multiple pieces of guiding information from multiple guiding satellites, fuses the guiding target areas still within the valid time, resolves the guiding target areas beyond the valid time, and iteratively updates at a certain time interval.

7. The method according to claim 1, wherein in step S4, When the routing satellite distributes the guiding information to the guided satellite, it sorts according to the code name of the guided satellite; When the number of stored guiding target areas is greater than the storage quantity M of the routing satellite, the routing satellite sorts according to the priority of the guiding target areas, and only retains the information of the M guiding target areas with the highest priority, and resolves the information of other guiding target areas.

8. The method according to claim 1, wherein in step S6, When the number of target areas to be observed in the guiding information is greater than the maximum number of observable target areas T in the single task of the guided satellite, only plan the tasks for the top T target areas with the highest priority, and resolve the other target areas; If there is a conflict between the on-ground upload task to be executed by the guided satellite and the guiding task, the on-ground upload task has a higher priority, and the guiding task is abandoned.

9. The method according to claim 1, wherein in step S1, the working parameters include: Orbit parameters, including the orbit parameters of the guiding satellite, the routing satellite, and the guided satellite; Satellite code; Satellite priority.

10. The method according to claim 1, wherein The guiding satellite and the routing satellite establish a link through the guiding antenna on the guiding satellite; The guided satellite and the routing satellite establish a link through the guiding antenna on the guided satellite.

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