Satellite link breakage processing circuit, device and remote sensing satellite

Abstract

The application discloses a satellite link break processing circuit, a device and a remote sensing satellite, and relates to the technical field of satellite communication. The circuit comprises a transceiving module, a storage module, a switching module, a real-time clock module and a controller; the controller is connected with the real-time clock module, the storage module and the switching module respectively; the switching module is connected with the transceiving module, the storage module and an image acquisition module respectively; and the real-time clock module is connected with the transceiving module and the storage module. Based on the above structure, the controller can predict the time of the next link break according to the current time, the periodic link break event period and the feedback time of the last link break, and control the switching module to switch the image sampling data transmission to the storage module for storage in advance, so that data loss caused by periodic link break is avoided.

Description

Technical Field

[0001] This application relates to the field of Earth-to-space communication technology, and in particular to a satellite link failure processing circuit, device, and remote sensing satellite. Background Technology

[0002] Satellites typically need to operate on the ground plane to communicate with corresponding ground stations. However, for ground stations surrounded by mountains, communication between the satellite and the ground station can be physically blocked by mountains and other obstacles. In such cases, the satellite may be unable to receive signals from the ground station at specific locations due to these obstacles, resulting in periodic temporary communication outages. When a satellite experiences a communication outage, the inability to transmit data and information to the ground station in a timely manner can lead to the loss of data or information for a certain period. Utility Model Content

[0003] The main purpose of this application is to provide a satellite link failure processing circuit, device, and remote sensing satellite, aiming to solve the technical problem of how to avoid data loss caused by periodic satellite link failures.

[0004] To achieve the above objectives, this application provides a satellite link loss processing circuit, which includes: a transceiver module, a storage module, a switching module, a real-time clock module, and a controller;

[0005] The controller is connected to the real-time clock module, the storage module, and the switching module; the switching module is connected to the transceiver module, the storage module, and the image acquisition module; the real-time clock module is connected to the transceiver module and the storage module.

[0006] The transceiver module is used to send a corresponding first feedback signal to the real-time clock module when it is unable to receive communication signals transmitted from the ground station.

[0007] The real-time clock module is used to send a real-time clock signal to the controller in real time, and to transmit a timing signal to the storage module when the first feedback signal is received.

[0008] The storage module is used to store the feedback time corresponding to the current timing signal when the timing signal is received;

[0009] The controller is configured to read all the feedback times from the storage module, calculate the time differences between each feedback time, and select the time differences with the same value as the target time difference;

[0010] The controller is further configured to output a first switching signal to the switching module before the current time corresponding to the currently received real-time clock signal and the previous feedback time differ from the target time difference;

[0011] The switching module is used to disconnect the first communication loop between the image acquisition module and the transceiver module when it receives the first switching signal, and connect the second communication loop between the image acquisition module and the storage module, so that the storage module stores the image acquisition data sent by the image acquisition module.

[0012] In one embodiment, the controller is also connected to the transceiver module;

[0013] The transceiver module is also used to send the first feedback signal to the controller when it is unable to receive the communication signal transmitted by the ground station;

[0014] The controller is further configured to output the first switching signal to the switching module when it receives the first feedback signal.

[0015] In one embodiment, the transceiver module is further configured to send the second feedback signal to the controller when it receives the communication signal transmitted by the ground station;

[0016] The controller is further configured to output the second switching signal to the switching module when it receives the second feedback signal;

[0017] The switching module is further configured to connect the first communication circuit and disconnect the second communication circuit when receiving the second switching signal, so that the transceiver module transmits the image acquisition data sent by the image acquisition module to the ground station.

[0018] In one embodiment, the satellite link failure processing circuit further includes: a data processing module;

[0019] The data processing module is connected to the storage module and the controller, respectively.

[0020] The controller is further configured to output an enable signal to the data processing module when the first switching signal is output;

[0021] The data processing module is configured to, upon receiving the enable signal, read the image acquisition data stored in the storage module, perform image processing on the image acquisition data to form image processing data, and send the image processing data back to the storage module so that the storage module stores the image processing data.

[0022] In one embodiment, the storage module is also connected to the transceiver module;

[0023] The transceiver module is also used to read the image processing data stored in the storage module when it receives the communication signal transmitted by the ground station, and transmit the image processing data to the ground station.

[0024] In one embodiment, the transceiver module is further configured to demodulate the communication signal into a corresponding control signal upon receiving the communication signal transmitted by the ground station, and transmit it to the controller;

[0025] The controller is further configured to output the first switching signal to the switching module when it receives the corresponding control signal.

[0026] In one embodiment, the transceiver module includes: a modulation unit, a signal transmitter, a signal receiver, and a signal monitoring unit;

[0027] The modulation unit is connected to the controller, the storage module, the switching module, the signal receiver, and the signal transmitter, respectively; the signal monitoring unit is connected to the signal receiver and the controller, respectively.

[0028] The modulation unit is used to modulate the image acquisition data or the image processing data into an image transmission signal, and transmit the image transmission signal to the ground station through the signal transmitter;

[0029] The modulation unit is also configured to receive communication signals sent by the ground station through the signal receiver, demodulate the communication signals into corresponding control signals, and transmit them to the controller;

[0030] The signal monitoring unit is used to send the feedback signal to the controller when it detects that the signal receiver has not received the communication signal within a preset time.

[0031] In one embodiment, both the communication signal and the image transmission signal are laser signals.

[0032] To achieve the above objectives, this application also proposes a satellite link disconnection processing device, which employs the satellite link disconnection processing circuit described above.

[0033] To achieve the above objectives, this application also proposes a remote sensing satellite that employs the satellite link disconnection processing device described above.

[0034] This application provides a satellite link failure processing circuit, device, and remote sensing satellite. The satellite link failure processing circuit includes: a transceiver module, a storage module, a switching module, a real-time clock module, and a controller. The controller is connected to the real-time clock module, the storage module, and the switching module. The switching module is connected to the transceiver module, the storage module, and the image acquisition module. The real-time clock module is connected to the transceiver module and the storage module. Based on this structure, the controller can predict the time of the next link failure based on the current time, the periodic link failure event cycle, and the feedback time of the last link failure, and control the switching module to switch the image sampling data to the storage module for storage in advance, thus avoiding data loss due to periodic link failures. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the satellite link breakage handling circuit in Embodiment 1 of this application;

[0038] Figure 2 This is a schematic diagram of the structure of the satellite link breakage handling circuit in Embodiment 2 of this application;

[0039] Figure 3 This is a schematic diagram of the structure of the satellite link breakage handling circuit in Embodiment 3 of this application.

[0040] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0042] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0043] This application presents a satellite link disconnection processing circuit according to a first embodiment. Please refer to [link / reference needed]. Figure 1The satellite link failure processing circuit includes: a transceiver module 10, a storage module 20, a switching module 30, a real-time clock module 40, and a controller 50;

[0044] The controller 50 is connected to the real-time clock module 40, the storage module 20, and the switching module 30, respectively; the switching module 30 is connected to the transceiver module 10, the storage module 20, and the image acquisition module 60, respectively; the real-time clock module 40 is connected to the transceiver module 10 and the storage module 20, respectively.

[0045] The transceiver module 10 is used to send a corresponding first feedback signal to the real-time clock module 40 when it is unable to receive the communication signal transmitted by the ground station 70.

[0046] The real-time clock module 40 is used to send a real-time clock signal to the controller 50 in real time, and to transmit a timing signal to the storage module 20 when it receives the first feedback signal.

[0047] The storage module 20 is used to store the feedback time corresponding to the current timing signal when the timing signal is received;

[0048] The controller 50 is used to read all the feedback times from the storage module 20, calculate the time difference between each feedback time, and filter out the time differences with the same value as the target time difference;

[0049] The controller 50 is also configured to output a first switching signal to the switching module 30 at a preset time before the current time corresponding to the current real-time clock signal differs from the previous feedback time by the target time difference.

[0050] The switching module 30 is used to disconnect the first communication loop between the image acquisition module 60 and the transceiver module 10 and connect the second communication loop between the image acquisition module 60 and the storage module 20 when it receives the first switching signal, so that the storage module 20 stores the image acquisition data sent by the image acquisition module 60.

[0051] It should be understood that, in this embodiment, the transceiver module 10, storage module 20, switching module 30, real-time clock module 40, image acquisition module 60, and controller 50 are all located on the satellite. Specifically, the satellite can be a remote sensing satellite used to acquire images of the Earth, and its image acquisition module 60 can acquire images of a specific area, thereby generating corresponding image acquisition data, which can be used for navigation, weather forecasting, and other functions.

[0052] It should be noted that, in this embodiment, the transceiver module 10 refers to a functional module capable of transmitting signals over ultra-long distances. It can wirelessly communicate with a ground station 70 on Earth, for example, by receiving communication signals sent by the ground station 70. Specifically, the communication signal can be an electromagnetic wave containing specific information, such as a laser beam.

[0053] It is readily understood that in this embodiment, the real-time clock module 40 is a functional module capable of generating a real-time clock, and its output real-time clock signal contains relevant information corresponding to the current time. Furthermore, the real-time clock module 40 can be triggered to generate a timing signal that records the specific moment of triggering, and this timing signal is transmitted to the storage module 20 for storage, so that the storage module 20 can store the specific time corresponding to the moment the real-time clock module 40 is triggered, i.e., the feedback time mentioned above. The first feedback signal provided by the transceiver module 10 can be used to trigger the real-time clock module 40 to generate the timing signal.

[0054] It should be noted that in this embodiment, the transceiver module 10 can detect in real time whether it can wirelessly communicate with the ground station 70 and generate a corresponding feedback signal. For example, when it cannot receive the communication signal sent by the ground station 70, it can be determined that a satellite link loss has occurred. At this time, the transceiver module 10 can automatically generate a first feedback signal to indicate that it cannot wirelessly communicate with the ground station 70.

[0055] It is readily understood that the controller 50 can be a control chip with limited storage capacity, capable of communicating with the storage module 20 and storing a small amount of data, information, and specific programs. These specific programs can configure certain functions for the controller 50. In this embodiment, the controller 50 can be configured with calculation capabilities, allowing it to read all feedback times stored in the storage module 20 and calculate the time difference between each pair of feedback times.

[0056] It should be noted that in this embodiment, since the satellite's trajectory is approximately fixed and its speed is also essentially constant, if obstacles such as mountains exist around the ground station 70, the communication link between the satellite and the ground station 70 will be physically blocked by these fixed obstacles at regular intervals during its periodic rotation around the Earth, resulting in periodic link interruptions. Because these link interruptions occur periodically, the events where the transceiver module 10 fails to receive communication signals from the ground station 70 also occur periodically. Therefore, theoretically, the storage module 20 stores a feedback time at regular intervals, and the time difference between the two closest feedback times corresponds to a fixed duration. Based on this principle, the specific event of the next link interruption can be predicted by using the time difference between two feedback times and the most recently stored feedback time.

[0057] It is worth noting that the causes of link interruptions are not always due to periodic events; they can also originate from sudden events, such as atmospheric turbulence. In this embodiment, the controller 50 is also equipped with a corresponding program that allows it to filter each calculated time difference and find target time differences with essentially the same duration. Since these target time differences can be repeatedly measured, it can be determined that such target time differences with essentially the same duration correspond to objectively periodic events, such as a satellite moving to a specific location and causing its communication link with the ground station 70 to be physically blocked by a specific mountain range.

[0058] It should be noted that in this embodiment, the controller 50 can read the most recently stored feedback time from the storage module 20, and simultaneously obtain the current time corresponding to the currently provided real-time clock signal from the real-time clock module 40, and obtain the difference between the two. If the difference between the current time and the feedback time is less than a preset time before reaching the predicted time of the next link failure, the controller 50 can output a corresponding switching signal to the switching module 30 to switch the on / off state of the connection loops at both ends.

[0059] It is easy to understand that the switching module 30 may have two connection loops, including a first communication loop for connecting the transceiver module 10 and the image acquisition module 60, and a second communication loop for connecting the storage module 20 and the image acquisition module 60. In this embodiment, if the controller 50 outputs a first switching signal to the switching module 30, it indicates that a periodic disconnection event is about to occur. At this time, the switching module 30 will respond to the first switching signal by connecting the second communication loop and disconnecting the first communication loop, so that all the currently acquired image acquisition data is temporarily stored in the storage module 20, thereby effectively avoiding data loss due to subsequent periodic disconnection events.

[0060] This application proposes a satellite link loss processing circuit, which includes a transceiver module, a storage module, a switching module, a real-time clock module, and a controller. The controller is connected to the real-time clock module, the storage module, and the switching module. The switching module is connected to the transceiver module, the storage module, and the image acquisition module. The real-time clock module is connected to the transceiver module and the storage module. Based on this structure, the controller can predict the time of the next link loss based on the current time, the periodic link loss event cycle, and the feedback time of the last link loss, and control the switching module to switch the image sampling data to the storage module for storage in advance, thus avoiding data loss due to periodic link losses.

[0061] Based on the first embodiment of the satellite link disconnection processing circuit of this application, in the second embodiment of the satellite link disconnection processing circuit of this application, the contents that are the same as or similar to those in the first embodiment of the satellite link disconnection processing circuit described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to... Figure 2 In this embodiment, the controller 50 is also connected to the transceiver module 10;

[0062] The transceiver module 10 is also used to send the first feedback signal to the controller 50 when it is unable to receive the communication signal transmitted by the ground station 70;

[0063] The controller 50 is further configured to output the first switching signal to the switching module 30 when it receives the first feedback signal.

[0064] It is easy to understand that, in this embodiment, in the event of a sudden disconnection, the transceiver module 10 can also send a first feedback signal to the controller 50 when it cannot receive a communication signal. The controller 50 can quickly respond to the first feedback signal and directly output a first switching signal to the switching module 30, so that the first switching module 30 can quickly connect the image acquisition module 60 to the storage module 20. Based on the above mechanism, the function of quickly storing image acquisition data can be realized when a sudden disconnection event occurs, avoiding data loss.

[0065] Furthermore, in this embodiment, the transceiver module 10 is also used to send the second feedback signal to the controller 50 when it receives the communication signal transmitted by the ground station 70;

[0066] The controller 50 is further configured to output the second switching signal to the switching module 30 when it receives the second feedback signal;

[0067] The switching module 30 is further configured to connect the first communication circuit and disconnect the second communication circuit when receiving the second switching signal, so that the transceiver module 10 transmits the image acquisition data sent by the image acquisition module 60 to the ground station 70.

[0068] It is easy to understand that in this embodiment, if the transceiver module 10 can receive the communication signal sent by the ground station 70 again, it indicates that the link loss state has ended. At this time, the transceiver module 10 can send a second feedback signal to the controller 50, so that the controller 50 sends a corresponding second switching signal to the switching module 30. When the switching module 30 receives the second switching signal, it determines that the transceiver module 10 and the ground station 70 can resume wireless communication. At this time, the switching module 30 can disconnect the second communication loop and connect the first communication loop, so that the image acquisition module 60 can directly transmit the currently acquired image acquisition data to the transceiver module 10, and then transmit it to the ground station 70 through the transceiver module 10. Based on the above mechanism, the communication link between the ground station 70 and the satellite can be quickly restored after the link loss event ends.

[0069] Furthermore, in this embodiment, the satellite link failure processing circuit further includes: a data processing module 80;

[0070] The data processing module 80 is connected to the storage module 20 and the controller 50 respectively;

[0071] The controller 50 is also configured to output an enable signal to the data processing module 80 when the first switching signal is output;

[0072] The data processing module 80 is configured to, upon receiving the enable signal, read the image acquisition data stored in the storage module 20, perform image processing on the image acquisition data to form image processing data, and send the image processing data back to the storage module 20 so that the storage module 20 stores the image processing data.

[0073] It should be noted that in this embodiment, the image acquisition data cannot be used directly. Instead, the ground station 70 needs to perform image processing to convert it into digital image data that can display high-definition and high-resolution images before it can be used. However, during the link loss process, the ground station 70 cannot perform the above image processing function. After the link is restored, the delayed image processing work of the ground station 70 may cause a delay in data use.

[0074] It is easy to understand that, in this embodiment, for the above situation, a data processing module 80 can be set on one side of the satellite to perform image processing or image preprocessing on the images temporarily stored in the storage module 20. In this embodiment, when the controller 50 outputs the first switching signal, it indicates that the image acquisition data acquired by the current image acquisition module 60 needs to be temporarily stored in the storage module 20. At this time, the controller 50 can send an enable signal to the data processing module 80 to wake up the data storage module 20 from standby mode, thereby performing the corresponding data processing work. After being woken up, the data processing module 80 can read the image acquisition data stored in the storage module 20, perform image processing on the image acquisition data to form corresponding optimized image processing data, and send the image processing data back to the storage module 20 to replace the original corresponding stored image acquisition data.

[0075] Furthermore, in this embodiment, the storage module 20 is also connected to the transceiver module 10;

[0076] The transceiver module 10 is also used to read the image processing data stored in the storage module 20 when it receives the communication signal transmitted by the ground station 70, and transmit the image processing data to the ground station 70.

[0077] It is easy to understand that in this embodiment, when the transceiver module 10 can re-establish communication with the ground station 70, it can preferentially read the image processing data stored in the storage module 20 after image processing has been completed, and wirelessly transmit it to the ground station 70, so as to reduce the data usage delay caused by the ground station 70 being unable to perform data processing.

[0078] Based on the first and / or second embodiments of the satellite link disconnection processing circuit of this application, the content that is the same as or similar to the first and second embodiments of the satellite link disconnection processing circuit described above in the third embodiment of the satellite link disconnection processing circuit of this application can be referred to the above description and will not be repeated hereafter. Based on this, please refer to... Figure 3 In this embodiment, the transceiver module 10 is further configured to demodulate the communication signal into a corresponding control signal when it receives the communication signal transmitted by the ground station 70, and transmit it to the controller 50.

[0079] The controller 50 is further configured to output the first switching signal to the switching module 30 when it receives the corresponding control signal.

[0080] It should be noted that, to ensure the reliability and accuracy of the communication signal, the ground station 70 will modulate it before transmission. In this embodiment, the transceiver module 10 can modulate / demodulate the received or transmitted signal before transmission. As one example, the transceiver module 10 can demodulate the communication signal transmitted by the ground station 70 to form a corresponding control signal containing control commands, and then transmit the control signal to the controller 50.

[0081] It is easy to understand that the control command corresponds to the control intention of the ground station 70. In a specific case, the control intention of the ground station 70 is to allow the satellite to actively enter a disconnected state to avoid events such as sunspot eruptions that may damage the satellite or interfere with Earth-satellite communication. Correspondingly, when the controller 50 receives the corresponding control signal, it can directly send a first switching signal to the first switching module 30 so that it can directly start storing the image acquisition data acquired by the current image acquisition module 60.

[0082] Furthermore, in this embodiment, the transceiver module 10 includes: a modulation unit 11, a signal transmitter 12, a signal receiver 13, and a signal monitoring unit 14;

[0083] The modulation unit 11 is connected to the controller 50, the storage module 20, the switching module 30, the signal receiver 13, and the signal transmitter 12, respectively; the signal monitoring unit 14 is connected to the signal receiver 13 and the controller 50, respectively.

[0084] The modulation unit 11 is used to modulate the image acquisition data or the image processing data into an image transmission signal, and transmit the image transmission signal to the ground station 70 through the signal transmitter 12;

[0085] The modulation unit 11 is also used to receive the communication signal sent by the ground station 70 through the signal receiver 13, demodulate the communication signal into a corresponding control signal, and transmit it to the controller 50;

[0086] The signal monitoring unit 14 is used to send the feedback signal to the controller 50 when it detects that the signal receiver 13 has not received the communication signal within a preset time.

[0087] It should be noted that in this embodiment, the modulation unit 11 can perform modulation and demodulation of data, information, and signals to ensure the reliability, accuracy, and stability of ultra-long-distance communication between the ground and satellite. The signal transmitter 12 is used to send signals to the ground station 70. The transmitted signal can be an image transmission signal modulated from the image acquisition signal obtained from the image acquisition module 60, or an image transmission signal modulated from the image processing signal obtained from the storage module 20. Correspondingly, the signal receiver 13 is used to receive the communication signals sent by the ground station 70. The modulation unit 11 can also demodulate the communication signals to form control signals that facilitate correct response from the controller 50.

[0088] It is readily understood that, in this embodiment, the transceiver module 10 may further include a signal monitoring unit 14, which can monitor in real time whether the signal receiver 13 can receive the communication signal sent by the ground station 70 within each preset time period. If the communication signal cannot be received within the specified preset time period, a current transmission disconnection event can be determined, a corresponding feedback signal can be generated, and it can be transmitted to the controller 50.

[0089] It is easy to understand that, as a specific case, the image transmission signal can also be a laser signal.

[0090] In addition, to achieve the above objectives, this application also provides a satellite link disconnection processing device, which employs the satellite link disconnection processing circuit described above.

[0091] The satellite link loss processing device provided in this application embodiment employs the satellite link loss processing circuit in the above embodiment, and can also solve the technical problem of how to avoid data loss caused by periodic satellite link loss. Compared with the prior art, the beneficial effects of the satellite link loss processing device provided in this application embodiment are the same as those of the satellite link loss processing circuit provided in the above embodiment, and other technical features in the satellite link loss processing device are the same as those disclosed in the method of the above embodiment, and will not be repeated here.

[0092] In addition, to achieve the above objectives, this application also provides a remote sensing satellite, which employs the satellite link disconnection processing device described above.

[0093] The remote sensing satellite provided in this application embodiment, employing the satellite link failure processing device described in the above embodiments, can also solve the technical problem of how to avoid data loss due to periodic satellite link failures. Compared with the prior art, the beneficial effects of the remote sensing satellite provided in this application embodiment are the same as those of the satellite link failure processing device provided in the above embodiments, and other technical features of the remote sensing satellite are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0094] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A satellite link failure handling circuit, characterized in that, For use in Earth-to-Satellite communication, the satellite link failure processing circuit includes: a transceiver module, a storage module, a switching module, a real-time clock module, and a controller; The controller is connected to the real-time clock module, the storage module, and the switching module; the switching module is connected to the transceiver module, the storage module, and the image acquisition module; the real-time clock module is connected to the transceiver module and the storage module. The transceiver module is used to send a corresponding first feedback signal to the real-time clock module when it is unable to receive communication signals transmitted from the ground station. The real-time clock module is used to send a real-time clock signal to the controller in real time, and to transmit a timing signal to the storage module when the first feedback signal is received. The storage module is used to store the feedback time corresponding to the current timing signal when the timing signal is received; The controller is configured to read all the feedback times from the storage module, calculate the time differences between each feedback time, and select the time differences with the same value as the target time difference; The controller is further configured to output a first switching signal to the switching module before the current time corresponding to the currently received real-time clock signal and the previous feedback time differ from the target time difference; The switching module is used to disconnect the first communication loop between the image acquisition module and the transceiver module when it receives the first switching signal, and connect the second communication loop between the image acquisition module and the storage module, so that the storage module stores the image acquisition data sent by the image acquisition module.

2. The satellite link failure processing circuit as described in claim 1, characterized in that, The controller is also connected to the transceiver module; The transceiver module is also used to send the first feedback signal to the controller when it is unable to receive the communication signal transmitted by the ground station; The controller is further configured to output the first switching signal to the switching module when it receives the first feedback signal.

3. The satellite link disconnection processing circuit as described in claim 2, characterized in that, The transceiver module is also used to send a second feedback signal to the controller when it receives the communication signal transmitted by the ground station; The controller is further configured to output a second switching signal to the switching module when it receives the second feedback signal; The switching module is further configured to connect the first communication circuit and disconnect the second communication circuit when receiving the second switching signal, so that the transceiver module transmits the image acquisition data sent by the image acquisition module to the ground station.

4. The satellite link disconnection processing circuit as described in claim 1, characterized in that, The satellite link failure handling circuit also includes: a data processing module; The data processing module is connected to the storage module and the controller, respectively. The controller is further configured to output an enable signal to the data processing module when the first switching signal is output; The data processing module is configured to, upon receiving the enable signal, read the image acquisition data stored in the storage module, perform image processing on the image acquisition data to form image processing data, and send the image processing data back to the storage module so that the storage module stores the image processing data.

5. The satellite link disconnection processing circuit as described in claim 4, characterized in that, The storage module is also connected to the transceiver module; The transceiver module is also used to read the image processing data stored in the storage module when it receives the communication signal transmitted by the ground station, and transmit the image processing data to the ground station.

6. The satellite link failure handling circuit as described in claim 5, characterized in that, The transceiver module is further configured to demodulate the communication signal into a corresponding control signal when it receives the communication signal transmitted by the ground station, and transmit it to the controller. The controller is further configured to output the first switching signal to the switching module when it receives the corresponding control signal.

7. The satellite link failure handling circuit as described in claim 6, characterized in that, The transceiver module includes: a modulation unit, a signal transmitter, a signal receiver, and a signal monitoring unit; The modulation unit is connected to the controller, the storage module, the switching module, the signal receiver, and the signal transmitter, respectively; the signal monitoring unit is connected to the signal receiver and the controller, respectively. The modulation unit is used to modulate the image acquisition data or the image processing data into an image transmission signal, and transmit the image transmission signal to the ground station through the signal transmitter; The modulation unit is also configured to receive communication signals sent by the ground station through the signal receiver, demodulate the communication signals into corresponding control signals, and transmit them to the controller; The signal monitoring unit is used to send the feedback signal to the controller when it detects that the signal receiver has not received the communication signal within a preset time.

8. The satellite link failure handling circuit as described in claim 7, characterized in that, Both the communication signal and the image transmission signal are laser signals.

9. A satellite link failure processing device, characterized in that, The satellite link failure processing device employs the satellite link failure processing circuit as described in any one of claims 1 to 8.

10. A remote sensing satellite, characterized in that, The remote sensing satellite employs the satellite link breakage processing device as described in claim 9.

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