A system and method for acquiring data from remote sensing satellite simulation on-orbit missions.

Abstract

This invention discloses a system and method for acquiring simulated on-orbit mission data of remote sensing satellites, used in the comprehensive testing phase of remote sensing satellites to conduct advance testing and verification of satellite functions and performance in ground test facilities. The system, through mission planning and distribution equipment, achieves coordinated control of ground equipment in various locations, ensuring that the equipment can logically coordinate and simulate on-orbit usage in advance, generating mission data with the same format as the actual on-orbit mission data of the remote sensing satellite. Furthermore, through a mission data coordination and receiving device, the system can aggregate the data received from various ground equipment, perform simultaneous interpretation, and confirm the correctness of the remote sensing satellite's on-orbit usage method in advance.

Description

Technical Field

[0001] This invention relates to a method and system for acquiring data from simulated on-orbit missions of remote sensing satellites, belonging to the field of spacecraft integrated testing technology. Background Technology

[0002] Currently, the use of remote sensing satellites is becoming increasingly complex, with a growing variety of onboard payloads and the addition of numerous auxiliary subsystems to improve imaging quality. Some remote sensing satellites also possess target recognition capabilities, demanding higher imaging accuracy and faster imaging coverage. Furthermore, remote sensing satellites are gradually shifting from single-satellite operation to multi-satellite collaborative and constellation-linked operation modes, enabling communication with other satellites and serving as relay satellites for communication between users and between users and other satellites. New subsystems such as inter-satellite links for inter-satellite communication have also been added. Satellite integrated testing is the testing and verification of a satellite's functionality and performance using ground equipment in a ground-based test facility before launch. For current multi-mode remote sensing satellites, during integrated testing, ground equipment transmits simulated on-orbit signals to and receives signals from the satellite under test. By simulating on-orbit usage in advance on the ground, mission data is obtained before launch, confirming the correctness of the satellite's on-orbit operation and the normality of the data, which is of great value. Current spacecraft integrated testing generally involves separate testing of each subsystem, and the testing and verification methods are relatively isolated. This makes it impossible to conduct ground testing and verification of the on-orbit operation mode of remote sensing satellites with a large number of complex subsystems that are interconnected. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a remote sensing satellite simulated on-orbit mission data acquisition system and method. By simulating the on-orbit usage mode on the ground in advance, mission data with the same format as the actual on-orbit mission data of the remote sensing satellite is generated, which is used to confirm the correctness of the on-orbit usage method of the remote sensing satellite in advance.

[0004] The technical solution of this invention is:

[0005] A remote sensing satellite simulation on-orbit mission data acquisition system includes mission planning and distribution equipment, power supply and distribution ground equipment, navigation signal simulator, attitude and orbit control ground equipment, telemetry and control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, imaging quality auxiliary subsystem ground equipment, payload data simulation source, bus monitoring equipment, antenna simulation equipment, mission data coordination and receiving equipment, and time reference equipment.

[0006] The mission planning and distribution equipment generates autonomous mission instructions based on the on-orbit simulation mission of the remote sensing satellite to be tested, and distributes and schedules the various devices in the system and the navigation signal simulator to work together.

[0007] The power supply and distribution ground equipment provides energy to the remote sensing satellite on the ground according to the working mode of the remote sensing satellite under test, simulating the actual energy state of the remote sensing satellite;

[0008] The navigation signal simulator outputs navigation signals to the remote sensing satellite, simulates the navigation satellite signals that the remote sensing satellite is actually expected to receive, transmits the orbital position of the remote sensing satellite, and assists the remote sensing satellite in positioning and orbit determination.

[0009] The attitude and orbit control ground equipment outputs excitation signals from the attitude sensor and agile machine actuator to assist the remote sensing satellite in determining its own attitude. At the same time, the excitation signals from the attitude sensor and agile machine actuator are simultaneously controlled by feedback signals from the attitude actuator of the remote sensing satellite, forming a closed loop.

[0010] The ground control equipment is used to send remote control commands to the remote sensing satellite and receive telemetry parameters.

[0011] The data transmission ground equipment is used to receive payload data and imaging quality auxiliary data transmitted by remote sensing satellites through the data transmission channel, and to demodulate and restore the data;

[0012] The data transmission and broadcasting ground equipment is used to simulate data transmission and broadcasting distribution;

[0013] The inter-satellite link ground equipment is used to simulate inter-satellite link communication between other satellites and remote sensing satellites.

[0014] The image quality assisting ground equipment includes a simulator and a data source for use by the remote sensing satellite image quality assisting equipment, which are used to generate stimuli to the image quality assisting equipment and enable the image quality assisting equipment to generate corresponding data.

[0015] The payload data simulation source is used to generate simulated payload data with targets, and send it to remote sensing satellites to extract the target data;

[0016] The bus monitoring device is used to monitor and receive remote sensing satellite bus data;

[0017] The antenna simulation device is used to simulate the rotation of a remote sensing satellite antenna and to provide feedback to the remote sensing satellite on the current antenna angle telemetry.

[0018] The task data coordination and receiving device is used to receive various types of data transmitted from various devices during remote sensing satellite missions, and to perform associated storage, interpretation and report generation.

[0019] The time reference device is used for time synchronization among ground equipment.

[0020] Furthermore, the task planning and distribution device includes a human-computer interaction module, a task planning module, an instruction storage module, and an instruction distribution module;

[0021] The human-computer interaction module is used to set task parameters, including working mode, mission start satellite time, imaging position, data transmission downlink method, communication information with other satellites, and communication information with the user;

[0022] After receiving the mission parameters, the mission planning module automatically performs autonomous mission planning according to the remote sensing satellite's autonomous mission execution logic, generating autonomous missions that need to be sent to the remote sensing satellite and operation instructions that need to be sent to ground equipment.

[0023] The instruction storage module, according to the remote sensing satellite instruction format definition and the ground equipment communication protocol, generates and stores the corresponding instruction sequences to be executed for the autonomous tasks to be sent to the remote sensing satellite and the operation instructions to be sent to various ground equipment.

[0024] The instruction distribution module distributes the instruction sequence according to a set time order: sending a state switching instruction to the power supply and distribution ground equipment; sending a satellite autonomous mission instruction and a satellite simulated flight start instruction to the telemetry, tracking, and command (TT&C) ground equipment; sending initial orbit information and a satellite simulated flight start instruction to the navigation signal simulator; sending initial orbit information, initial attitude information, and a satellite simulated flight start instruction to the attitude and orbit control ground equipment; sending a data receiving instruction to the high-speed data transmission ground equipment; sending a data transmission and reception instruction to the data transmission and broadcasting ground equipment; sending a data transmission and reception instruction to the inter-satellite link ground equipment; sending an equipment start instruction to the image quality assistance ground equipment; sending a data storage start instruction to the bus monitoring equipment; sending a data start reception instruction to the mission data coordination and receiving equipment; and sending an equipment start instruction to the time reference equipment.

[0025] Furthermore, the ground control equipment receives autonomous mission instructions and satellite simulation flight start instructions sent to the mission planning and distribution equipment, generates remote control instructions, and sends them to the remote sensing satellite.

[0026] Furthermore, the antenna simulation device receives antenna commands sent by the satellite, simulates the rotation of the remote sensing satellite antenna on the ground, and provides feedback to the remote sensing satellite on the antenna angle and speed telemetry.

[0027] Furthermore, the mission data receiving equipment receives data generated by high-speed data transmission equipment, data transmission broadcasting equipment, and inter-satellite link equipment, and stores the data according to the equipment from which the data originates.

[0028] Furthermore, remote sensing satellites, power supply and distribution ground equipment, navigation signal simulators, attitude and orbit control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, and image quality auxiliary ground equipment maintain a unified clock through time reference equipment to ensure that time-marked work tasks issued by the mission planning and distribution equipment to remote sensing satellites and the aforementioned other equipment are executed simultaneously.

[0029] The method for simulating on-orbit mission data acquisition using a remote sensing satellite simulation on-orbit mission data acquisition system includes:

[0030] S1: Based on the expected mission status of the remote sensing satellite under test, set the mission parameters in the mission planning and distribution equipment, including mission mode, time information, imaging position, satellite attitude, data transmission downlink method, communication information with other satellites, and communication information with users.

[0031] S2: The mission planning and distribution equipment plans the mission according to the mission parameters, generates autonomous mission instructions to be uploaded to the remote sensing satellite and control instructions to be sent to the ground equipment, and stores them in chronological order; the mission planning and distribution equipment then aligns the current ground time with the current time of the remote sensing satellite, and converts the time of all instruction transmission to the corresponding ground time.

[0032] S3: Confirm that the time reference equipment has started working and that the time between all devices is consistent. When the time for sending the first instruction is reached, the mission planning and distribution equipment begins to execute the stored sequence of planning instructions; the power supply and distribution ground equipment sets its working status, and the navigation signal simulator and attitude and orbit control ground equipment synchronously output the relevant stimuli for on-orbit simulated flight to the remote sensing satellite to execute simulated on-orbit flight. The bus monitoring equipment begins to monitor and receive.

[0033] S4: The mission planning and distribution equipment sends a sequence of instructions according to the time order. Before data recording begins, it activates the image quality auxiliary ground equipment to output auxiliary data to the payload, activates the payload simulation source ground equipment, and outputs simulated payload data with targets to the remote sensing satellite. Before data playback begins, it activates the high-speed data transmission ground equipment and configures the parameters. When another satellite enters the communication range of this satellite, it activates the inter-satellite link ground equipment to transmit signals from other satellites. When communication is expected, it activates the data transmission broadcast ground equipment to distribute data transmission broadcast data.

[0034] S5: When the ground data receiving equipment receives the downlink data, the mission data coordination receiving equipment begins to collect data information from ground equipment in various locations, classifies and names the received data information according to the device identifier that sent the data, and stores it uniformly.

[0035] Furthermore, in step S2, the mission planning and distribution equipment aligns the current ground time with the current satellite time and calculates the current time T of the remote sensing satellite. S Current time T on the ground D The relative difference ΔT = T S -T D Then the ground time T0' of the first instruction transmission time is:

[0036] T0' = T0 - T W -ΔT

[0037] In the formula, T0 is the satellite start time of the mission, and TW It is the time for pre-imaging work.

[0038] Furthermore, in step S1, among the task parameters, the task mode parameter gives the satellite working mode, the time information parameter gives the satellite moment when the task starts, the imaging position parameter gives the imaging point position, the satellite attitude parameter gives the satellite attitude angle, the downlink mode parameter of the data transmission gives the data transmission working mode, the communication information parameter with other satellites gives the inter-satellite link working mode, and the communication information parameter with users gives the broadcast distribution working mode.

[0039] The advantages of the present invention compared with the prior art are as follows:

[0040] (1) By designing the task planning and distribution device, the present invention realizes the linkage control of ground equipment during the entire satellite comprehensive test, ensuring that the ground equipment can be linked logically. For example, when the on-orbit satellite is in the night, since there is no sunlight, the entire satellite is powered by the battery, and the visible light camera is generally not used. During the ground comprehensive test, in order to simulate this state, it is necessary to disconnect the power supply of the ground power supply and distribution equipment, make the entire satellite powered by the battery, and prohibit the use of the visible light camera through the autonomous task command. The task planning and distribution device can realize the linkage of the ground power supply and distribution equipment and the measurement and control equipment, so as to more realistically simulate the on-orbit satellite usage mode, and solve the defect that the ground equipment in the prior art is isolated and separated, and it is difficult to conduct linkage tests on each subsystem of the entire satellite.

[0041] (2) The task data overall receiving device designed by the present invention can converge the data received by multiple ground equipment and perform interpretation simultaneously, solving the defect that the interpretation of the comprehensive test data in the prior art is isolated and separated, and it is difficult to interpret the linkage state of each subsystem of the satellite. Brief Description of the Drawings

[0042] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0043] Figure 1 It is a schematic diagram of the composition of the remote sensing satellite simulated on-orbit task data acquisition system according to an embodiment of the present invention;

[0044] Figure 2 It is a flowchart of the remote sensing satellite simulated on-orbit task data acquisition method according to an embodiment of the present invention. Detailed Embodiments

[0045] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0046] This invention proposes a remote sensing satellite simulation on-orbit mission data acquisition system, such as... Figure 1 As shown, the equipment includes mission planning and distribution equipment, power supply and distribution ground equipment, navigation signal simulator, attitude and orbit control ground equipment, telemetry and control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, imaging quality auxiliary subsystem (referred to as image quality auxiliary) ground equipment, payload data simulation source, bus monitoring equipment, antenna simulation equipment, mission data coordination and receiving equipment, and time reference equipment. The communication protocols of all the above equipment are unified to ensure that they can transmit control commands and status parameters to each other. Interfaces are set up to enable all the above equipment to exchange time information or clock frequency information with the time reference equipment, so that all equipment can achieve time consistency.

[0047] The remote sensing satellite under test is located on the ground and is an actual remote sensing satellite product. It has the functions of sending telemetry parameters and receiving remote control commands; it can receive navigation satellite signals for positioning and orbit determination; it has on-orbit attitude and orbit control functions; it can perform agile and maneuverable remote sensing imaging, image quality enhancement, data transmission, inter-satellite communication, and user communication functions, and has a usage mode similar to a central satellite or relay satellite; it can transmit and transmit data through various methods such as satellite-to-ground, satellite-to-satellite, and corresponding combinations.

[0048] The mission planning and distribution equipment is used to interact with operators, receive response parameters of the satellite simulation on-orbit mission to be executed, and automatically perform mission planning according to the set mission parameters. This includes autonomous missions expected to be executed by the satellite and corresponding operational tasks of the ground equipment. The generated instructions are sent to the satellite or ground equipment in the corresponding time sequence, and the telemetry and other ground equipment operation status parameters transmitted by the satellite are monitored.

[0049] The mission planning and distribution equipment provides a human-machine interface, mainly used to set mission parameters, including working mode, mission start satellite time, imaging position, data transmission downlink method, communication information with other satellites, and communication information with users. After collecting this information, the mission planning and distribution equipment uses it as input parameters and automatically performs autonomous mission planning according to the satellite's autonomous mission execution logic. When performing autonomous mission planning, the mission planning and distribution equipment not only needs to send the autonomous mission to the satellite, but also needs to plan the corresponding ground equipment operation instructions. After successfully planning the mission, it generates the corresponding instruction sequence to be executed according to the satellite instruction format definition and the ground equipment communication protocol, and stores it in the storage area.

[0050] The operational logic of ground equipment and satellites is pre-programmed into the mission planning equipment using a programming language. For example, one hour before the satellite's scheduled start time, it's necessary to determine if the power supply and distribution ground equipment, navigation signal simulator, attitude and orbit control ground equipment, bus monitoring equipment, and telemetry and control ground equipment are powered on. If not, each device is started, and a satellite simulation flight start command is sent, causing each device to begin sending simulated on-orbit signals to the satellite. If they are powered on, it's checked whether the corresponding simulated on-orbit signals have been sent. If not, a satellite simulation flight start command is sent to each device, causing each device to begin sending simulated on-orbit signals to the satellite. If signals have been sent, the autonomous mission command can be sent. Another example: after the autonomous mission command is issued, 10 minutes before the satellite's scheduled start time, it's checked if the data transmission and broadcasting ground equipment, inter-satellite link ground equipment, imaging quality auxiliary subsystem (image quality auxiliary) ground equipment, and payload data simulation source are powered on. If not, a receiving device start data reception command is sent to them, ensuring each device is operational.

[0051] Different satellites may have different operating logics during ground-based integrated testing depending on their on-orbit usage. It is necessary to first understand the satellite's on-orbit usage and then configure the operating logic of each device in the mission planning equipment according to the usage method so that the corresponding devices can be started correctly according to the logical sequence.

[0052] The external interfaces of the mission planning and distribution equipment include sending state switching commands to power supply and distribution ground equipment; sending satellite autonomous mission commands and satellite simulated flight start commands to telemetry and control ground equipment; sending initial orbit information and satellite simulated flight start commands to navigation signal simulators; sending initial orbit information, initial attitude information, and satellite simulated flight start commands to attitude and orbit control ground equipment; and, when necessary, sending process orbit information, process attitude information, and orbit switching commands; sending data receiving commands to high-speed data transmission ground equipment; sending data transmission and receiving commands to data transmission and broadcasting ground equipment; sending data transmission and receiving commands to inter-satellite link ground equipment; sending equipment startup commands to image quality assist ground equipment; sending data storage startup commands to bus monitoring equipment; sending data start receiving commands to mission data coordination and receiving equipment; and sending equipment startup commands to time reference equipment.

[0053] The ground power supply equipment provides energy to the satellite according to its operating mode, simulating the actual energy status of the remote sensing satellite. The interface with the satellite includes the energy supplied to the satellite and the receiving equipment status switching commands from the mission planning and distribution equipment.

[0054] The power supply and distribution ground equipment provides energy to the satellite according to the satellite's working mode, simulating the actual energy status of the remote sensing satellite.

[0055] The navigation signal simulator outputs navigation signals to the satellite, simulating the navigation satellite signals that the remote sensing satellite is expected to receive, transmitting the satellite's orbital position, and assisting in satellite positioning and orbit determination. External interfaces include an interface for transmitting navigation satellite signals to the satellite, an interface for transmitting reference time to the time reference equipment, and an interface for receiving initial orbital information and simulated flight start command information from the mission planning and distribution equipment.

[0056] The attitude and orbit control ground equipment outputs excitation signals from attitude sensors and agile machine actuators to assist high-orbit satellites in determining their own attitude. Simultaneously, the attitude sensor and agile machine actuator excitation signals are controlled by feedback signals from the satellite's attitude actuators, forming a closed loop. The interface with the satellite includes transmitting attitude and agile machine actuator excitation signals, receiving feedback signals from the attitude actuators, and receiving initial orbit information, initial attitude information, and satellite simulated flight start commands, as well as process orbit information, process attitude information, and orbit switching commands from the mission planning and distribution equipment.

[0057] Ground control and tracking equipment is used to send remote control commands to the satellite and receive telemetry parameters. The remote control commands it sends include autonomous mission commands and satellite simulated flight start commands sent by the mission planning and distribution equipment. The interface with the satellite includes sending remote control commands, receiving telemetry parameters, and receiving satellite autonomous mission commands and satellite simulated flight start commands from the mission planning and distribution equipment.

[0058] High-speed data transmission ground equipment is used to receive payload data, imaging quality auxiliary data, and other service data transmitted from satellites via data transmission channels, and to demodulate and restore the data. The interface with the satellite includes receiving high-speed data transmission data, initiating data reception commands with the mission planning and distribution equipment, and transmitting mission data status information with the mission data coordination receiving equipment.

[0059] Ground-based data broadcasting equipment is used to simulate user data distribution. Its interface with the satellite includes receiving downlink data for broadcast distribution, sending uplink data for broadcast distribution, and communicating with mission planning and distribution equipment regarding data transmission and reception commands.

[0060] Inter-satellite link ground equipment is used to simulate inter-satellite link communication between other satellites (hereinafter referred to as "other satellites") and this satellite (hereinafter referred to as "this satellite"). The interface with the satellite includes receiving data sent from this satellite to other satellites, sending data sent from other satellites to this satellite, and sending and receiving commands to the mission planning and distribution equipment.

[0061] Image quality assist ground equipment mainly includes simulators and data sources used for image quality assist, such as satellite simulators and image simulation sources, which are used to generate stimuli to the image quality assist and produce corresponding data. The interface with the satellite includes the simulation data sent to the satellite image quality assist equipment, the excitation signals sent to the satellite image quality assist equipment, and the receiving equipment start command of the mission planning and distribution equipment.

[0062] The payload data simulation source generates simulated payload data with targets, sends it to the satellite to extract the target data, and verifies the satellite's target extraction function. The interface with the satellite includes the simulated payload data sent to the satellite, the data transmission command to the mission planning and distribution equipment, and the receiving reference time from the time reference equipment.

[0063] The bus monitoring device is used to monitor and receive satellite bus data. Its interface with the satellite includes monitoring and receiving satellite bus data, and storing and initiating data from the mission planning and distribution equipment.

[0064] Antenna simulation equipment is used to simulate satellite antenna rotation and provide telemetry feedback on the current antenna angle to the satellite. The interface with the satellite includes receiving antenna commands from the satellite and sending telemetry data such as antenna angle and speed to the satellite.

[0065] The mission data coordination and receiving equipment is used to receive various types of data transmitted during satellite missions, and to perform associated storage and report generation. It has no interface with the satellite, but receives data generated by ground equipment from high-speed data transmission equipment, data transmission broadcasting equipment, and inter-satellite link equipment. The data is categorized and stored according to the equipment of its source, and the receiving equipment of the mission planning and distribution equipment initiates data reception commands.

[0066] Based on satellite data interpretation methods, satellite data interpretation logic is configured in the mission data coordination and receiving equipment. For example, for an area array camera, imaging only occurs after the satellite has stopped maneuvering. Therefore, the mission data coordination and receiving equipment determines the satellite's attitude information from the camera auxiliary data. If the satellite's attitude is found to be stationary, the equipment then checks the satellite imaging time in the camera auxiliary data to confirm that the satellite imaging occurred when it was stationary. Another example: satellite target identification results may be simultaneously transmitted from high-speed data transmission and data broadcast channels. The mission data coordination and receiving equipment compares the consistency of data from these two different sources. If the data matches, the transmitted data is considered normal; if they do not match, the location of the inconsistent data is generated in the report. The mission data coordination and receiving equipment can receive data from high-speed data transmission equipment, data broadcast equipment, and inter-satellite link equipment, thus enabling simultaneous interpretation of data from different sources.

[0067] The time reference equipment is used for time unification among ground equipment. It has the ability to unify the transmission time with ground equipment other than antenna simulation equipment, and the reception time with navigation signal simulator. This ensures that power supply and distribution ground equipment, navigation signal simulator, attitude and orbit control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, and image quality auxiliary ground equipment remain consistent. This ensures that time-stamped work tasks issued by the mission planning and distribution equipment to remote sensing satellites, navigation signal simulators, attitude and orbit control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, and image quality auxiliary ground equipment can be executed simultaneously and synchronously.

[0068] This system simulates the method of acquiring on-orbit mission data and is used in the comprehensive testing phase of remote sensing satellites before they begin actual on-orbit operation, in ground testing facilities to pre-test and verify their functional performance. For example... Figure 2 As shown, the method includes the following steps:

[0069] 1) Based on the satellite's desired mission status, set mission parameters in the mission planning and distribution equipment, including operating mode, mission start satellite time, imaging position, data transmission downlink method, communication information with other satellites, and communication information with users, as shown in Table 1:

[0070] Table 1 Task Parameter Settings Table

[0071] Serial Number parameter content 1. Task Mode Satellite working mode 2. Time information Mission start satellite time 3. Imaging position Imaging point location 4. Satellite attitude Satellite attitude angle 5. Data transmission download method Data transmission working mode 6. Communication with other stars Inter-satellite link working mode 7. Communicating information with users Broadcast distribution working mode 8. Equipment selection information Subordinate spaceborne equipment selection status 9. other ……

[0072] 2) The satellite operating mode, autonomous mission logic, satellite command format definition, and ground equipment communication protocol are pre-defined in the mission planning and distribution equipment. After receiving the mission parameters, the mission planning and distribution equipment plans the mission according to the set parameters, referring to the satellite operating mode and autonomous mission logic, and generates the autonomous mission commands to be uploaded to the satellite according to the satellite format definition file. It also generates the control commands to be sent to the ground equipment according to the ground equipment communication protocol and stores them in sequence. The current ground time is aligned with the current satellite time, and the current satellite time T is calculated. S Current time T on the ground D The relative difference ΔT = T S -T D Then the ground time T0' of the first instruction transmission time is:

[0073] T0' = T0 - T W -ΔT

[0074] In the formula, T0 is the satellite start time of the mission, and T W This is the pre-imaging setup time. All command transmission times are converted to ground time before transmission.

[0075] 3) Confirm that the time reference equipment has started working and that the time is consistent across all devices. When the first instruction is sent, the mission planning and distribution equipment begins to execute the stored sequence of planning instructions. The power supply and distribution ground equipment sets its own output status according to the satellite's working mode. The navigation signal simulator and attitude and orbit control ground equipment receive the satellite's initial orbit information and synchronously output relevant stimuli for simulated on-orbit flight to the satellite to execute simulated on-orbit flight. The bus monitoring equipment begins monitoring and receiving.

[0076] 4) The mission planning and distribution equipment sends a sequence of instructions according to the time order. Before data recording begins, it activates the image quality assistance ground equipment to output image quality assistance excitation to the satellite, enabling the satellite image quality assistance subsystem to output auxiliary data; it activates the payload simulation source ground equipment to output simulated payload data with targets to the satellite, enabling the satellite to output target identification results; it activates the high-speed data transmission ground equipment and configures the parameters before data playback begins; it activates the inter-satellite link ground equipment to transmit signals from other satellites when other satellites enter the communication range of this satellite; and it activates the data transmission broadcast ground equipment to distribute data transmission broadcast data when the user expects to communicate.

[0077] 5) When the ground data receiving equipment receives the downlink data, the mission data coordination receiving equipment begins to collect data information from ground equipment in various locations through the network. The received data information is classified and named according to the IP address or other identifier of the data sending equipment, and is uniformly stored, interpreted, and reports generated.

[0078] The embodiments described above are merely preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A remote sensing satellite simulation on-orbit mission data acquisition system, characterized in that, This includes mission planning and distribution equipment, power supply and distribution ground equipment, navigation signal simulators, attitude and orbit control ground equipment, telemetry and control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, image quality auxiliary ground equipment, payload data simulation source, bus monitoring equipment, antenna simulation equipment, mission data coordination and receiving equipment, and time reference equipment. The mission planning and distribution equipment generates autonomous mission instructions based on the on-orbit simulation mission of the remote sensing satellite to be tested, and distributes and schedules the various devices in the system and the navigation signal simulator to work together. The power supply and distribution ground equipment provides energy to the remote sensing satellite on the ground according to the working mode of the remote sensing satellite under test, simulating the actual energy state of the remote sensing satellite; The navigation signal simulator outputs navigation signals to the remote sensing satellite, simulates the navigation satellite signals that the remote sensing satellite is actually expected to receive, transmits the orbital position of the remote sensing satellite, and assists the remote sensing satellite in positioning and orbit determination. The attitude and orbit control ground equipment outputs excitation signals from the attitude sensor and agile machine actuator to assist the remote sensing satellite in determining its own attitude. At the same time, the excitation signals from the attitude sensor and agile machine actuator are simultaneously controlled by feedback signals from the attitude actuator of the remote sensing satellite, forming a closed loop. The ground control equipment is used to send remote control commands to the remote sensing satellite and receive telemetry parameters. The high-speed data transmission ground equipment is used to receive payload data and imaging quality auxiliary data transmitted by remote sensing satellites through the data transmission channel, and to demodulate and restore the data. The data transmission and broadcasting ground equipment is used to simulate data transmission and broadcasting distribution; The inter-satellite link ground equipment is used to simulate inter-satellite link communication between other satellites and remote sensing satellites. The image quality assisting ground equipment includes a simulator and a data source for use by the remote sensing satellite image quality assisting equipment, which are used to generate stimuli to the image quality assisting equipment and enable the image quality assisting equipment to generate corresponding data. The payload data simulation source is used to generate simulated payload data with targets, and send it to remote sensing satellites to extract the target data; The bus monitoring device is used to monitor and receive remote sensing satellite bus data; The antenna simulation device is used to simulate the rotation of a remote sensing satellite antenna and to provide feedback to the remote sensing satellite on the current antenna angle telemetry. The task data coordination and receiving device is used to receive various types of data transmitted from various devices during remote sensing satellite missions, and to perform associated storage, interpretation and report generation. The time reference device is used for time synchronization among ground equipment.

2. The remote sensing satellite simulation on-orbit mission data acquisition system according to claim 1, characterized in that, The task planning and distribution device includes a human-computer interaction module, a task planning module, an instruction storage module, and an instruction distribution module; The human-computer interaction module is used to set task parameters, including working mode, mission start satellite time, imaging position, data transmission downlink method, communication information with other satellites, and communication information with the user; After receiving the mission parameters, the mission planning module automatically performs autonomous mission planning according to the remote sensing satellite's autonomous mission execution logic, generating autonomous missions that need to be sent to the remote sensing satellite and operation instructions that need to be sent to various ground devices. The instruction storage module, according to the remote sensing satellite instruction format definition and the ground equipment communication protocol, generates and stores the corresponding instruction sequences to be executed for the autonomous tasks to be sent to the remote sensing satellite and the operation instructions to be sent to various ground equipment. The instruction distribution module distributes the instruction sequence according to a set time order: sending a state switching instruction to the power supply and distribution ground equipment; sending a satellite autonomous mission instruction and a satellite simulated flight start instruction to the telemetry, tracking, and command (TT&C) ground equipment; sending initial orbit information and a satellite simulated flight start instruction to the navigation signal simulator; sending initial orbit information, initial attitude information, and a satellite simulated flight start instruction to the attitude and orbit control ground equipment; sending a data receiving instruction to the high-speed data transmission ground equipment; sending a data transmission and reception instruction to the data transmission and broadcasting ground equipment; sending a data transmission and reception instruction to the inter-satellite link ground equipment; sending an equipment start instruction to the image quality assistance ground equipment; sending a data storage start instruction to the bus monitoring equipment; sending a data start reception instruction to the mission data coordination and receiving equipment; and sending an equipment start instruction to the time reference equipment.

3. The remote sensing satellite simulation on-orbit mission data acquisition system according to claim 1, characterized in that, The ground control equipment receives autonomous mission instructions and satellite simulation flight start instructions sent to the mission planning and distribution equipment, generates remote control instructions, and sends them to the remote sensing satellite.

4. The remote sensing satellite simulation on-orbit mission data acquisition system according to claim 1, characterized in that, The antenna simulation device receives antenna commands sent by the satellite, simulates the rotation of the remote sensing satellite antenna on the ground, and provides feedback to the remote sensing satellite on the antenna angle and speed telemetry.

5. The remote sensing satellite simulation on-orbit mission data acquisition system according to claim 1, characterized in that, The mission data receiving equipment receives data generated by high-speed data transmission ground equipment, data transmission broadcast ground equipment, and inter-satellite link ground equipment, and stores the data according to the equipment from which it originates.

6. The remote sensing satellite simulation on-orbit mission data acquisition system according to claim 1, characterized in that, Remote sensing satellites, power supply and distribution ground equipment, navigation signal simulators, attitude and orbit control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, and image quality auxiliary ground equipment maintain a unified clock through time reference equipment. This ensures that when mission planning and distribution equipment issues time-stamped work tasks to remote sensing satellites, power supply and distribution ground equipment, navigation signal simulators, attitude and orbit control ground equipment, high-speed data transmission ground equipment, data transmission and broadcasting ground equipment, inter-satellite link ground equipment, and image quality auxiliary ground equipment, they are executed simultaneously.

7. The method for acquiring simulated on-orbit mission data using the remote sensing satellite simulation on-orbit mission data acquisition system as described in claim 1, characterized in that, include: S1: Based on the expected mission status of the remote sensing satellite under test, set the mission parameters in the mission planning and distribution equipment, including mission mode, time information, imaging position, satellite attitude, data transmission downlink method, communication information with other satellites, and communication information with users. S2: The mission planning and distribution equipment plans the mission according to the mission parameters, generates autonomous mission instructions to be uploaded to the remote sensing satellite and control instructions to be sent to the ground equipment, and stores them in chronological order; the mission planning and distribution equipment then aligns the current ground time with the current time of the remote sensing satellite, and converts the time of all instruction transmission to the corresponding ground time. S3: Confirm that the time reference equipment has started working and that the time between all devices is consistent. When the time for sending the first instruction is reached, the mission planning and distribution equipment begins to execute the stored sequence of planning instructions; the power supply and distribution ground equipment sets its working status, and the navigation signal simulator and attitude and orbit control ground equipment synchronously output the relevant stimuli for on-orbit simulated flight to the remote sensing satellite to execute simulated on-orbit flight. The bus monitoring equipment begins to monitor and receive. S4: The mission planning and distribution equipment sends a sequence of instructions according to the time order. Before data recording begins, it activates the image quality auxiliary ground equipment to output auxiliary data to the payload, activates the payload simulation source ground equipment, and outputs simulated payload data with targets to the remote sensing satellite. Before data playback begins, it activates the high-speed data transmission ground equipment and configures the parameters. When another satellite enters the communication range of this satellite, it activates the inter-satellite link ground equipment to transmit signals from other satellites. When communication is expected, it activates the data transmission broadcast ground equipment to distribute data transmission broadcast data. S5: When the ground data receiving equipment receives the downlink data, the mission data coordination receiving equipment begins to collect data information from ground equipment in various locations, classifies and names the received data information according to the device identifier that sent the data, and stores it uniformly.

8. The method for acquiring simulated on-orbit mission data according to claim 7, characterized in that, In step S2, the mission planning and distribution equipment aligns the current ground time with the current satellite time and calculates the current time T of the remote sensing satellite. S Current time T on the ground D The relative difference ΔT = T S -T D Then the ground time T0' of the first instruction transmission time is: T0'=T0-T W -ΔT In the formula, T0 is the satellite start time of the mission, and T W This refers to the pre-image processing time.

9. The method for acquiring simulated on-orbit mission data according to claim 7, characterized in that, In step S1, among the mission parameters, the mission mode parameter specifies the satellite working mode, the time information parameter specifies the satellite start time, the imaging position parameter specifies the imaging point position, the satellite attitude parameter specifies the satellite attitude angle, the data transmission downlink mode parameter specifies the data transmission working mode, the inter-satellite communication information parameter specifies the inter-satellite link working mode, and the user communication information parameter specifies the broadcast distribution working mode.

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