Satellite-based open / closed state remote control and telemetry command data transmission system and method

Abstract

This invention provides a satellite overt and covert remote control and telemetry command data transmission system and method. The system includes a telemetry and control module, an encryption / decryption module, and an onboard computer module. The telemetry and control module and the onboard computer module are transparently connected via the encryption / decryption module, forming independent overt and covert uplink / downlink channels. The telemetry and control module and the onboard computer module are also connected via encryption / decryption via the encryption / decryption module, forming independent covert uplink / downlink channels. The onboard computer module uses an LSCCU01 type central control unit SIP module as its processor, with its TC / TM interface serving as the overt remote control and telemetry interface for connecting the overt and covert uplink / downlink channels. The synchronous RS422 interface of the onboard computer's I / O interface board serves as the covert remote control and telemetry interface for connecting the covert uplink / downlink channels. This invention employs a separate design for overt and covert interfaces, enabling the effective application of domestically produced processors under the stringent data security requirements of the aerospace field.

Description

Technical Field

[0001] This invention relates to the field of satellite communication technology, specifically to a satellite open / closed state remote control and telemetry command data transmission system and method based on a domestically produced processor. Background Technology

[0002] For well-known reasons, with the increasingly severe external environment, domestic substitution has become inevitable. Domestically produced processors will undoubtedly gradually become dominant in the aerospace field, and their applications will become increasingly widespread and mature.

[0003] In traditional spaceborne computer telemetry and control interface designs, both overt and covert interfaces are implemented using FPGA software on the I / O interface board. If the I / O interface board malfunctions, the uplink and downlink of the telemetry and control channel will be completely interrupted, leading to irreparable catastrophic consequences. Summary of the Invention

[0004] To address the aforementioned shortcomings in the existing technology, this invention provides a satellite open / closed state remote control and telemetry command data transmission system and method based on a domestically produced processor.

[0005] According to one aspect of the present invention, a satellite open / closed state remote control and telemetry command data transmission system is provided, comprising: a telemetry and control module, an encryption / decryption module, and an onboard computer module; wherein:

[0006] The telemetry and control module and the onboard computer module are connected via an encryption and decryption module to form an independent open-state uplink and downlink channel.

[0007] The telemetry and control module and the onboard computer module are connected via the encryption and decryption module to form an independent encrypted uplink and downlink channel;

[0008] The onboard computer module uses an LSCCU01 type central control unit SIP module as the processor. The TC / TM interface of the LSCCU01 type central control unit SIP module serves as the open-state remote control and telemetry interface, used to connect the open-state uplink and downlink channels. The synchronous RS422 interface of the IO interface board of the onboard computer serves as the closed-state remote control and telemetry interface, used to connect the closed-state uplink and downlink channels.

[0009] Preferably, the telemetry and control module, the encryption / decryption module, and the onboard computer module employ a dual-machine backup strategy to achieve both overt and covert remote control data transmission and overt and covert telemetry data transmission; wherein:

[0010] The telemetry and control module adopts dual-machine hot backup, including: telemetry and control transponder A and telemetry and control transponder B; the encryption and decryption module adopts dual-machine cold backup, including: encryption and decryption machine A and encryption and decryption machine B; the onboard computer module adopts dual-machine cold backup, including onboard computer A and onboard computer B.

[0011] Preferably, the dual-machine backup strategy for open-state remote control data transmission includes:

[0012] The data gates of transponder A and transponder B open simultaneously to receive remote control command data from the ground. Transponder A and transponder B forward the remote control command data to onboard computer A and onboard computer B, respectively. The onboard computer on duty reads the corresponding remote control command data packet from the FIFO memory of the TC controller corresponding to its active remote control interface, compares and verifies the remote control command data packet, and if the received remote control command data packet is correct, it parses and executes the remote control command; otherwise, it discards the remote control command data packet.

[0013] Preferably, the dual-machine backup strategy for encrypted remote control data transmission includes:

[0014] The data gates of transponder A and transponder B open simultaneously to receive remote control command data from the ground. Transponder A and transponder B respectively send the remote control command data to encryption / decryption unit A and encryption / decryption unit B. The on-duty encryption / decryption unit decrypts the corresponding remote control command data and forwards it to the on-duty spaceborne computer. The on-duty spaceborne computer reads the remote control command data packet through the corresponding encrypted remote control interface, compares and verifies the remote control command data packet. If the received remote control command data packet is correct, it parses and executes the remote control command; otherwise, it discards the remote control command data packet.

[0015] Preferably, the dual-machine backup strategy for clear-state telemetry data transmission includes:

[0016] The onboard computer on duty sends telemetry signal data to the corresponding telemetry and control transponder through its corresponding open-state telemetry interface, and then forwards it to the ground through the telemetry and control transponder.

[0017] Preferably, the dual-machine backup strategy for dense telemetry data transmission includes:

[0018] The onboard computer on duty sends telemetry signals to the corresponding encryption / decryption unit through its corresponding encrypted telemetry interface. The encryption / decryption unit encrypts the telemetry signals and sends them to the corresponding telemetry and control transponder, which then forwards them to the ground.

[0019] According to another aspect of the present invention, a satellite open / closed state remote control and telemetry command data transmission method is provided, comprising:

[0020] Independent overt and covert uplink / downlink channels are constructed between the telemetry and control module and the onboard computer module. The overt remote control and telemetry interface of the overt uplink / downlink channel adopts the TC / TM interface of the LSCCU01 central control unit SIP module of the onboard computer module, and the covert remote control and telemetry interface of the covert uplink / downlink channel adopts the synchronous RS422 interface of the IO interface board of the onboard computer.

[0021] The telemetry and control module sends the received remote control command data to the onboard computer module through the open state uplink channel. The onboard computer module receives the data through its corresponding open state remote control interface and compares, parses and executes it to realize the transmission of open state remote control command data.

[0022] The telemetry and control module sends the received remote control command data to the encryption and decryption module through the encrypted uplink channel for decryption, and then sends it to the onboard computer module. The onboard computer module receives the data through its corresponding encrypted remote control interface and compares, parses and executes it to realize the transmission of encrypted remote control command data.

[0023] The onboard computer module sends telemetry signal data to the telemetry and control module through its corresponding open-state telemetry interface and open-state downlink channel, and forwards it to the ground through the telemetry and control module to realize the transmission of open-state telemetry command data;

[0024] The onboard computer module sends telemetry signals to the encryption / decryption module through its corresponding secure telemetry interface and secure downlink channel. The encryption / decryption module encrypts the telemetry signals and sends them to the telemetry and control module, which then forwards them to the ground, thus realizing the transmission of secure telemetry command data.

[0025] Preferably, the telemetry and control module, the encryption / decryption module, and the onboard computer module employ a dual-machine backup strategy to achieve both overt and covert remote control data transmission and overt and covert telemetry data transmission; wherein:

[0026] The telemetry and control module adopts dual-machine hot backup, including: telemetry and control transponder A and telemetry and control transponder B; the encryption and decryption module adopts dual-machine cold backup, including: encryption and decryption machine A and encryption and decryption machine B; the onboard computer module adopts dual-machine cold backup, including onboard computer A and onboard computer B.

[0027] By adopting the above technical solution, the present invention has at least one of the following beneficial effects compared with the prior art:

[0028] The satellite open / closed state remote control and telemetry command data transmission system and method provided by this invention fully utilizes the performance characteristics of the LSCCU01 central control unit SIP module of the domestic processor, and carries out open / closed state telemetry design of the telemetry and control channel, which meets the high reliability requirements of the aerospace field for satellite-to-ground communication and has very important practical application value.

[0029] The satellite open / closed state remote control and telemetry command data transmission system and method provided by this invention, based on the need for both open and closed state dual modes in the aerospace field, adopts a scheme with separate open and closed state interfaces, enabling the effective application of domestic processors under the strict data confidentiality requirements of the aerospace field.

[0030] The satellite open / closed state remote control and telemetry command data transmission system and method provided by this invention utilizes the TC / TM interface integrated in the SIP module of the domestically produced LSCCU01 central control unit as the open state remote control and telemetry interface, which can effectively solve the problem of complete uplink and downlink interruption of the telemetry and control channel caused by abnormality of the IO interface board.

[0031] The satellite open / closed state remote control and telemetry command data transmission system and method provided by this invention realizes the domestic substitution of processors in the aerospace field, which is of great significance. Attached Figure Description

[0032] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the composition structure of a satellite open / closed state remote control and telemetry command data transmission system according to a preferred embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of the open / closed state remote control data stream in a preferred embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the open-closed state telemetry data stream in a preferred embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram illustrating the working principle of the satellite open / closed state remote control and telemetry command data transmission method in a preferred embodiment of the present invention. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below: These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

[0038] One embodiment of the present invention provides a satellite open-ended and closed-ended remote control and telemetry command data transmission system. The system designs two independent uplink and downlink interfaces for the telemetry and control channel of the domestic processor, open-ended and closed-ended. At the same time, for higher reliability, the two independent interfaces are designed on different hardware resources, which avoids the complete interruption of satellite telemetry and control uplink and downlink in the event of IO interface board malfunction or IO interface board damage, thus ensuring the correct and stable operation of satellite communication.

[0039] like Figure 1 As shown, the satellite open / closed state remote control and telemetry command data transmission system provided in this embodiment includes: a telemetry and control module, an encryption / decryption module, and an onboard computer module; wherein:

[0040] The telemetry and control module and the onboard computer module are connected via an encryption / decryption module to form an independent open-state uplink and downlink channel.

[0041] The telemetry and control module and the onboard computer module are connected via an encryption and decryption module to form an independent encrypted uplink and downlink channel;

[0042] The onboard computer module uses the LSCCU01 type central control unit SIP module as the processor. The TC / TM interface of the LSCCU01 type central control unit SIP module is used as the open-state remote control and telemetry interface to connect the open-state uplink and downlink channels. The synchronous RS422 interface of the IO interface board of the onboard computer is used as the closed-state remote control and telemetry interface to connect the closed-state uplink and downlink channels.

[0043] In a preferred embodiment, a dual-machine backup strategy is adopted among the telemetry and control module, the encryption / decryption module, and the onboard computer module to realize both overt and covert remote control data transmission and overt and covert telemetry data transmission, such as... Figure 2 and Figure 3 As shown; where:

[0044] The telemetry and control module adopts dual-machine hot backup, including telemetry and control transponder A and telemetry and control transponder B; the encryption and decryption module adopts dual-machine cold backup, including encryption and decryption machine A and encryption and decryption machine B; the onboard computer module adopts dual-machine cold backup, including onboard computer A and onboard computer B.

[0045] In a preferred embodiment, the dual-machine backup strategy for open-state remote control data transmission includes:

[0046] The data gates of transponders A and B open simultaneously to receive remote control command data from the ground. Transponders A and B forward the remote control command data to onboard computers A and B, respectively. The onboard computer on duty reads the corresponding remote control command data packet from the FIFO memory of the TC controller corresponding to its active remote control interface, compares and verifies the data packet, and if the received remote control command data packet is correct, it parses and executes the remote control command; otherwise, it discards the remote control command data packet.

[0047] In a preferred embodiment, the dual-machine backup strategy for encrypted remote control data transmission includes:

[0048] The data gates of telemetry and control transponders A and B open simultaneously to receive remote control command data from the ground. Transponders A and B then send the remote control command data to encryption / decryption units A and B, respectively. The on-duty encryption / decryption unit decrypts the corresponding remote control command data and forwards it to the on-duty spaceborne computer. The on-duty spaceborne computer reads the remote control command data packet through the corresponding encrypted remote control interface, compares and verifies the data packet, and if the received remote control command data packet is correct, parses and executes the remote control command; otherwise, the remote control command data packet is discarded.

[0049] In a preferred embodiment, the dual-machine backup strategy for luminous telemetry data transmission includes:

[0050] The onboard computer on duty sends telemetry signal data to the corresponding telemetry and control transponder through its corresponding open-state telemetry interface, and then forwards it to the ground through the telemetry and control transponder.

[0051] In a preferred embodiment, the dual-machine backup strategy for dense telemetry data transmission includes:

[0052] The onboard computer on duty sends telemetry signals to the corresponding encryption / decryption unit through its corresponding secure telemetry interface. The encryption / decryption unit encrypts the telemetry signals and sends them to the corresponding telemetry and control transponder, which then forwards them to the ground.

[0053] An embodiment of the present invention also provides a method for transmitting satellite open / closed state remote control and telemetry command data.

[0054] like Figure 4 As shown, the satellite open / closed state remote control and telemetry command data transmission method provided in this embodiment includes:

[0055] Independent overt and covert uplink / downlink channels are constructed between the telemetry and control module and the onboard computer module. The overt remote control and telemetry interface of the overt uplink / downlink channel adopts the TC / TM interface of the LSCCU01 central control unit SIP module of the onboard computer module, while the covert remote control and telemetry interface of the covert uplink / downlink channel adopts the synchronous RS422 interface of the IO interface board of the onboard computer.

[0056] The telemetry and control module sends the received remote control command data to the onboard computer module through the open state uplink channel. The onboard computer module receives the data through its corresponding open state remote control interface and compares, parses and executes it to realize the transmission of open state remote control command data.

[0057] The telemetry and control module sends the received remote control command data to the encryption and decryption module through the encrypted uplink channel for decryption, and then sends it to the onboard computer module. The onboard computer module receives the data through its corresponding encrypted remote control interface, compares, parses and executes it, thus realizing the transmission of encrypted remote control command data.

[0058] The onboard computer module sends telemetry signal data to the telemetry and control module through its corresponding open-state telemetry interface and open-state downlink channel, and then forwards it to the ground through the telemetry and control module to realize the transmission of open-state telemetry command data;

[0059] The onboard computer module sends telemetry signals to the encryption / decryption module through its corresponding secure telemetry interface and secure downlink channel. The encryption / decryption module encrypts the telemetry signals and sends them to the telemetry and control module, which then forwards them to the ground, thus realizing the transmission of secure telemetry command data.

[0060] The technical solution provided by the above embodiments of the present invention will be further explained below with reference to a specific application example.

[0061] This specific application example uses the Tianxing-1 experimental satellite as an example to demonstrate the application of the above-mentioned satellite open / closed state remote control and telemetry command data transmission scheme.

[0062] The core onboard computer of the Tianxing-1 experimental satellite is based on the domestically produced LSCCU01 central control unit SIP module. The telemetry and control channel is designed with two independent uplink and downlink interfaces: open state and closed state. For higher reliability, the two independent interfaces are designed on different hardware resources: the open state channel is directly connected to the TM / TC interface of the SIP module through the encryption and decryption module, while the closed state channel is connected to the synchronous RS422 of the IO interface board after the encryption and decryption module.

[0063] On Tianxing-1, two sets of RS422 telemetry and control synchronization interfaces were designed: one for open-ended and one for closed-ended telemetry and control. These interfaces utilize Q-class interface chips from NS (Solar Instruments). The open-ended telemetry and control interface is implemented directly using the TC / TM interface integrated into the SIP module, while the closed-ended telemetry and control interface uses an I / O interface board, with the logic implemented by an FPGA. To prevent complete interruption of satellite telemetry and control uplink and downlink in the event of I / O interface board malfunction or damage, a new redundancy scheme for the telemetry and control channel design is proposed for the reliable application of this domestically produced processor in the aerospace field.

[0064] The design of this specific application example mainly involves the following interface modules:

[0065] (1) Telemetry™ interface and remote control TC interface of LSCCU01 central control unit SIP module. The core of LSCCU01 central control unit SIP module adopts the domestically produced radiation-resistant SoC - LCSOC3233 based on SPARC V8. The module comes with 2 telemetry™ interfaces and 2 remote control TC interfaces, each with 1KB transmit FIFO and receive FIFO;

[0066] (2) Encryption / decryption module, including: encryption / decryption machine A and encryption / decryption machine B;

[0067] (3) Measurement and control module, including: measurement and control transponder A and measurement and control transponder B.

[0068] In this specific application example, telemetry and control transponder A and telemetry and control transponder B are dual-machine hot backups, encryption and decryption machine A and encryption and decryption machine B are dual-machine cold backups (encryption and decryption machine A is the default on duty), and onboard computer A and onboard computer B are dual-machine cold backups (onboard computer A is the default on duty).

[0069] Dual-machine backup strategy for explicit / implicit remote control data transmission, such as Figure 2 As shown, it includes:

[0070] (1) Data transmission process of remote control command in the open state: The data gates of the telemetry and control transponder A / B will open simultaneously and receive remote control commands from the ground. The telemetry and control transponder A / B will forward the commands to the onboard computer A / B respectively. The onboard computer on duty will read the remote control data packets from the FIFO of the open state TC1 / TC2 controller through its satellite service software, compare and verify the data of the two, and only if the received command data packets are confirmed to be correct will the remote control commands be parsed from the remote control data packets and executed. Otherwise, the data packets will be discarded.

[0071] (2) Data transmission process for encrypted remote control commands: The telemetry and control transponders A and B respectively send the received encrypted remote control data packets to the encryption / decryption unit A and encryption / decryption unit B. Since encryption / decryption units A and B are dual-machine cold standby, the on-duty encryption / decryption unit decrypts the data packets and forwards them to the I / O interface board of the onboard computer. Similar to the open-state remote control processing method, the spacecraft software needs to read the remote control data packets from the encrypted TC1 / TC2 controller, parse, compare, and execute them.

[0072] Dual-machine backup strategy for open-closed state telemetry data transmission, such as Figure 3 As shown, it includes:

[0073] (1) Clear-state telemetry command data transmission process: Because the onboard computer is in cold standby mode, clear-state telemetry data will only be sent from the clear-state telemetry TM1 or TM2 interface of the onboard computer on duty. These are sent to both telemetry transponder A and telemetry transponder B. Although the telemetry transponders are in hot standby mode, at any given time, the satellite management software will only activate the transmitter of one of the telemetry transponders (default setting is telemetry transponder A). Therefore, the ground will only capture one downlink telemetry signal.

[0074] (2) Data transmission process for encrypted telemetry commands: Encrypted telemetry data is transmitted from the onboard computer to encryption / decryption unit A and encryption / decryption unit B via the I / O interface board. Because encryption / decryption unit A and encryption / decryption unit B are dual-machine cold standby, the encrypted telemetry data will only be sent from one encryption / decryption unit to both telemetry and control transponder A and telemetry and control transponder B. Similarly, with only one telemetry and control transponder transmitter activated, the ground will only receive one encrypted telemetry data stream.

[0075] As can be seen from the above application of the scheme, after the successful launch of Tianxing-1, the telemetry and control during the active phase and the orbit insertion phase both adopted the open-state telemetry and remote control method. The telemetry data reception was normal, the remote control commands were executed correctly, and the satellite's uplink and downlink functions operated stably. After the satellite's attitude stabilized, it entered the on-orbit mission phase. So far, the closed-state telemetry and remote control strategy has been adopted. All closed-state remote control commands were executed normally, the downlink of closed-state telemetry data was stable and reliable, the ground resolution was correct, and there were no errors.

[0076] The satellite open / closed state remote control and telemetry command data transmission system and method provided in the above embodiments of the present invention fully utilize the performance characteristics of the LSCCU01 central control unit SIP module of the domestic processor, and carry out open / closed state telemetry design of the telemetry and control channel, meeting the high reliability requirements of the aerospace field for satellite-to-ground communication, and has very important practical application value; according to the need of the aerospace field to support open and closed state dual modes, a scheme of separate open and closed state interfaces is adopted, which enables the effective application of domestic processors under the strict data confidentiality requirements of the aerospace field; it realizes the domestic substitution of processors in the aerospace field, which is of great significance.

[0077] Any matters not covered in the above embodiments of the present invention are well-known in the art.

[0078] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A satellite-based open / closed state remote control and telemetry command data transmission system, characterized in that, include: The module includes a telemetry and control module, an encryption / decryption module, and a spaceborne computer module; among which: The telemetry and control module and the onboard computer module are connected via an encryption and decryption module to form an independent open-state uplink and downlink channel. The telemetry and control module and the onboard computer module are connected via the encryption and decryption module to form an independent encrypted uplink and downlink channel; The onboard computer module uses the LSCCU01 aerospace computer's central control unit system-in-package module as its processor. The remote control and telemetry interface of the LSCCU01 aerospace computer's central control unit system-in-package module serves as the open-state remote control and telemetry interface, used to connect to the open-state uplink and downlink channels. The synchronous balanced voltage digital interface of the onboard computer module's input / output interface board serves as the closed-state remote control and telemetry interface, used to connect to the closed-state uplink and downlink channels.

2. The satellite open / closed state remote control and telemetry command data transmission system according to claim 1, characterized in that, The telemetry and control module, the encryption / decryption module, and the onboard computer module employ a dual-machine backup strategy to achieve both overt and covert remote control data transmission and overt and covert telemetry data transmission; wherein: The telemetry and control module adopts dual-machine hot backup, including: telemetry and control transponder A and telemetry and control transponder B; the encryption and decryption module adopts dual-machine cold backup, including: encryption and decryption machine A and encryption and decryption machine B; the onboard computer module adopts dual-machine cold backup, including onboard computer A and onboard computer B.

3. The satellite open / closed state remote control and telemetry command data transmission system according to claim 2, characterized in that, The dual-machine backup strategy for open-state remote control data transmission includes: The data gates of transponder A and transponder B open simultaneously to receive remote control command data from the ground. Transponder A and transponder B forward the remote control command data to onboard computer A and onboard computer B, respectively. The onboard computer on duty reads the corresponding remote control command data packet from the first-in-first-out memory of the remote controller corresponding to the active remote control interface, compares and verifies the remote control command data packet, and if the received remote control command data packet is correct, it parses and executes the remote control command; otherwise, it discards the remote control command data packet.

4. The satellite open / closed state remote control and telemetry command data transmission system according to claim 2, characterized in that, The dual-machine backup strategy for secure remote control data transmission includes: The data gates of transponder A and transponder B open simultaneously to receive remote control command data from the ground. Transponder A and transponder B respectively send the remote control command data to encryption / decryption unit A and encryption / decryption unit B. The on-duty encryption / decryption unit decrypts the corresponding remote control command data and forwards it to the on-duty spaceborne computer. The on-duty spaceborne computer reads the remote control command data packet through the corresponding encrypted remote control interface, compares and verifies the remote control command data packet. If the received remote control command data packet is correct, it parses and executes the remote control command; otherwise, it discards the remote control command data packet.

5. The satellite open / closed state remote control and telemetry command data transmission system according to claim 2, characterized in that, The dual-machine backup strategy for open-state telemetry data transmission includes: The onboard computer on duty sends telemetry signal data to the corresponding telemetry and control transponder through its corresponding open-state telemetry interface, and then forwards it to the ground through the telemetry and control transponder.

6. The satellite open / closed state remote control and telemetry command data transmission system according to claim 2, characterized in that, The dual-machine backup strategy for dense telemetry data transmission includes: The onboard computer on duty sends telemetry signals to the corresponding encryption / decryption unit through its corresponding encrypted telemetry interface. The encryption / decryption unit encrypts the telemetry signals and sends them to the corresponding telemetry and control transponder, which then forwards them to the ground.

7. A method for transmitting satellite open / closed state remote control and telemetry command data, characterized in that, include: Independent overt and covert uplink / downlink channels are constructed between the telemetry and control module and the onboard computer module. The overt remote control and telemetry interface of the overt uplink / downlink channel adopts the remote control and telemetry interface of the central control unit system-level encapsulation module of the LSCCU01 aerospace computer used by the onboard computer module. The covert remote control and telemetry interface of the covert uplink / downlink channel adopts the synchronous balanced voltage digital interface of the input / output interface board of the onboard computer. The telemetry and control module sends the received remote control command data to the onboard computer module through the open state uplink channel. The onboard computer module receives the data through its corresponding open state remote control interface and compares, parses and executes it to realize the transmission of open state remote control command data. The telemetry and control module sends the received remote control command data to the encryption and decryption module through the encrypted uplink channel for decryption, and then sends it to the onboard computer module. The onboard computer module receives the data through its corresponding encrypted remote control interface and compares, parses and executes it to realize the transmission of encrypted remote control command data. The onboard computer module sends telemetry signal data to the telemetry and control module through its corresponding open-state telemetry interface and open-state downlink channel, and forwards it to the ground through the telemetry and control module to realize the transmission of open-state telemetry command data; The onboard computer module sends telemetry signals to the encryption / decryption module through its corresponding secure telemetry interface and secure downlink channel. The encryption / decryption module encrypts the telemetry signals and sends them to the telemetry and control module, which then forwards them to the ground, thus realizing the transmission of secure telemetry command data.

8. The satellite open / closed state remote control and telemetry command data transmission method according to claim 7, characterized in that, The telemetry and control module, the encryption / decryption module, and the onboard computer module employ a dual-machine backup strategy to achieve both overt and covert remote control data transmission and overt and covert telemetry data transmission; wherein: The telemetry and control module adopts dual-machine hot backup, including: telemetry and control transponder A and telemetry and control transponder B; the encryption and decryption module adopts dual-machine cold backup, including: encryption and decryption machine A and encryption and decryption machine B; the onboard computer module adopts dual-machine cold backup, including onboard computer A and onboard computer B.

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