Laser remote sensing integrated machine, data transmission method and data processing method

Abstract

The present application discloses a laser remote sensing integrated machine, a data transmission method and a data processing method, wherein the integrated machine comprises a first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem and a data processing device; the first angle adjustment device projects a remote sensing detection signal and a first laser signal to the preprocessing device; the preprocessing device transmits a first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; transmits a second optical path corresponding to the first laser signal to the laser subsystem; the remote sensing detection subsystem converts the first optical path to obtain a remote sensing image digital signal, and sends it to the data processing device; the data processing device extracts information from the remote sensing image digital signal to obtain link building reference data; based on the link building reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link building angle; the laser subsystem restores the second optical path to the first laser signal, and sends the laser receiving data corresponding to the first laser signal to the data processing device.

Description

Technical Field

[0001] The present application relates to the field of satellite networks, and in particular to an all-in-one laser remote sensing machine, a data transmission method, and a data processing method. Background Art

[0002] With the rapid development of satellite network technology, satellite functions are becoming more and more comprehensive. Laser communication and remote sensing imaging between satellites and the ground are two important tasks of satellites. Satellite optical communication generally uses laser as an information carrier. Due to the higher carrier frequency, the communication capacity of optical communication is much greater than that of traditional radio frequency communication. Satellite remote sensing technology uses various sensor instruments to collect, process, and finally image the electromagnetic wave information radiated and reflected by distant targets, thereby realizing comprehensive observation of detection and identification of various ground scenes.

[0003] In related technologies, laser communication and earth remote sensing imaging are two relatively independent tasks, which are completed through their own independent systems.

[0004] However, the two independent systems occupy a large volume; in addition, in laser communications, it is difficult to establish a link accurately and efficiently due to factors such as uncertain pointing. Summary of the invention

[0005] The present application provides a laser remote sensing integrated machine, a data transmission method and a data processing method, which are used to realize laser remote sensing fusion transmission and to achieve accurate and efficient link establishment in laser communication.

[0006] In a first aspect, an embodiment of the present application provides a laser remote sensing integrated machine, comprising: a first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem, and a data processing device;

[0007] The first angle adjustment device is used to project the remote sensing detection signal and the first laser signal to the pre-processing device;

[0008] The preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and transmit the second optical path corresponding to the first laser signal to the laser subsystem;

[0009] The remote sensing detection subsystem is used to perform signal conversion on the first optical path to obtain a remote sensing image digital signal, and send the remote sensing image digital signal to the data processing device;

[0010] The data processing device is used to extract information from the remote sensing image digital signal to obtain link building reference data; based on the link building reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link building angle;

[0011] The laser subsystem is used to restore the second optical path to the first laser signal, and send the laser receiving data corresponding to the first laser signal to the data processing device.

[0012] In some optional implementation manners, the data processing device is further used for:

[0013] Sending downlink remote sensing data to the laser subsystem;

[0014] The laser subsystem is further used to generate a second laser signal corresponding to the downlink remote sensing data, and transmit the second laser signal to the first angle adjustment device;

[0015] The first angle adjustment device is also used to project the second laser signal onto the ground.

[0016] In some optional implementations, the pre-processing device includes a main optical system and a spectroscopic device;

[0017] The main optical system is used to focus the remote sensing detection signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path;

[0018] The light splitting device is used to transmit the first light path to the remote sensing detection subsystem; and transmit the second light path to the laser subsystem.

[0019] In some optional implementations, the laser subsystem includes an acquisition tracking pointing (ATP) subsystem and a laser communicator;

[0020] The ATP subsystem is used to restore the second optical path to a first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communicator;

[0021] The laser communicator is used to modulate and demodulate the first laser signal to obtain the laser reception data.

[0022] In some optional implementation manners, the data processing device is specifically used to:

[0023] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0024] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the link building angle.

[0025] In some optional implementation manners, the data processing device is specifically used to:

[0026] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0027] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0028] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0029] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0030] In some optional implementation manners, the data processing device is specifically used to:

[0031] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0032] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0033] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0034] In some optional implementations, the data processing device includes part or all of a laser management field programmable gate array (FPGA), a remote sensing management FPGA, and an image processing chip.

[0035] In a second aspect, an embodiment of the present application provides a data transmission method for performing satellite simulation using any laser remote sensing integrated machine described in the first aspect above.

[0036] In a third aspect, an embodiment of the present application provides a data processing method, which is applied to any data processing device described in the first aspect, including:

[0037] Extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data;

[0038] The first angle adjustment device and the laser subsystem are controlled to adjust the link building angle based on the link building reference data.

[0039] Some optional implementations also include:

[0040] The downlink remote sensing data is sent to the laser subsystem, so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

[0041] In some optional implementations, information extraction is performed on the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data, including:

[0042] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0043] Controlling the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data includes:

[0044] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link building angle.

[0045] In some optional implementations, based on the first link building reference data and the second link building reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link building angle includes:

[0046] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0047] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0048] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0049] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0050] In some optional implementations, based on the first link building reference data and the second link building reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link building angle includes:

[0051] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0052] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0053] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0054] In a fourth aspect, an embodiment of the present application provides a data processing device, including:

[0055] The information extraction module is used to extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the reference data for link building;

[0056] The laser processing module is used to control the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data.

[0057] Some optional implementations further include a remote sensing processing module for:

[0058] The downlink remote sensing data is sent to the laser subsystem, so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

[0059] In some optional implementation manners, the information extraction module is specifically used to:

[0060] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0061] Laser processing modules are specifically used for:

[0062] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link building angle.

[0063] In some optional implementations, the laser processing module is specifically used for:

[0064] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0065] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0066] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0067] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0068] In some optional implementations, the laser processing module is specifically used for:

[0069] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0070] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0071] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0072] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising at least one processor and at least one memory, wherein the memory stores a computer program, and when the program is executed by the processor, the processor executes any one of the methods described in the second or third aspect above.

[0073] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program executable by a processor, wherein when the program runs on the processor, the processor executes any of the methods described in the second or third aspects above.

[0074] The above scheme integrates the two capabilities of laser communication and remote sensing imaging through an integrated setting of laser remote sensing, thereby reducing the occupied volume and improving the functional density of the payload; through the integration of some devices, laser communication and remote sensing imaging share the first angle adjustment device, preprocessing device and data processing device, reducing the overhead caused by data transmission between different devices and effectively improving data processing efficiency; in addition, the data processing device obtains reference data for guiding link establishment (link establishment reference data) by extracting information from the high-resolution remote sensing image digital signal; based on the link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, thereby reducing the system pointing error and improving the link establishment efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0076] Figure 1 A schematic diagram of a first laser remote sensing integrated machine provided in an embodiment of the present application;

[0077] Figure 2 A schematic diagram of a second laser remote sensing integrated machine provided in an embodiment of the present application;

[0078] Figure 3 A schematic diagram of a third laser remote sensing integrated machine provided in an embodiment of the present application;

[0079] Figure 4 A schematic diagram of a fourth laser remote sensing integrated machine provided in an embodiment of the present application;

[0080] Figure 5 The first remote sensing image digital signal provided in the embodiment of the present application;

[0081] Figure 6 The second remote sensing image digital signal provided in the embodiment of the present application;

[0082] Figure 7 The third remote sensing image digital signal provided in the embodiment of the present application;

[0083] Figure 8 A schematic flow chart of a first data processing method provided in an embodiment of the present application;

[0084] Fig. 9 A schematic flow chart of a second data processing method provided in an embodiment of the present application;

[0085] Fig.10A schematic flow chart of a third data processing method provided in an embodiment of the present application;

[0086] Fig.11 A schematic flow chart of a fourth data processing method provided in an embodiment of the present application;

[0087] Fig.12 A schematic flow chart of a fifth data processing method provided in an embodiment of the present application;

[0088] Fig.13 A schematic diagram of the structure of a data processing device provided in an embodiment of the present application;

[0089] Fig.14 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0090] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0091] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0092] In the description of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two devices. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] With the rapid development of satellite network technology, satellite functions are becoming more and more comprehensive. Laser communication and remote sensing imaging between satellites and the ground are two important tasks of satellites. Satellite optical communication generally uses laser as an information carrier. Due to the higher carrier frequency, the communication capacity of optical communication is much greater than that of traditional radio frequency communication. Satellite remote sensing technology uses various sensor instruments to collect, process, and finally image the electromagnetic wave information radiated and reflected by distant targets, thereby realizing comprehensive observation of detection and identification of various ground scenes.

[0094] In related technologies, laser communication and earth remote sensing imaging are two relatively independent tasks, which are completed through their own independent systems.

[0095] However, the two independent systems occupy a large volume.

[0096] In addition, the beam angle in laser communication is much lower than that in traditional radio frequency communication, which increases the difficulty of aiming and capturing, and there are problems such as long link establishment time and low link establishment success rate. For example, after the satellite enters orbit, the initial pointing uncertainty of the optical antenna is large due to factors such as weightlessness and active segment impact. The coordinate system and optical axis change to the order of milliradian (mrad), which is much larger than the laser beam divergence and even exceeds the capture and tracking field of view. Special on-orbit calibration or pointing correction is required, which leads to a long initial link establishment time; when the satellite platform experiences thermal deformation of the cabin under the influence of sunlight, the pointing uncertainty will be degraded again, which can reach the order of mrad, resulting in further extension of the subsequent link establishment time or even link establishment failure. These problems seriously affect the on-orbit practicality of laser communication links.

[0097] Based on this, the embodiments of the present application provide a laser remote sensing all-in-one machine, a data transmission method and a data processing method to realize laser remote sensing fusion transmission and to achieve accurate and efficient link establishment in laser communication.

[0098] See also Figure 1 As shown, this embodiment provides a first laser remote sensing integrated machine, including: a first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem and a data processing device;

[0099] The first angle adjustment device is used to project the remote sensing detection signal and the first laser signal to the pre-processing device;

[0100] The preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and transmit the second optical path corresponding to the first laser signal to the laser subsystem;

[0101] The remote sensing detection subsystem is used to perform signal conversion on the first optical path to obtain a remote sensing image digital signal, and send the remote sensing image digital signal to the data processing device;

[0102] The data processing device is used to extract information from the remote sensing image digital signal to obtain link building reference data; based on the link building reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link building angle;

[0103] The laser subsystem is used to restore the second optical path to the first laser signal, and send the laser receiving data corresponding to the first laser signal to the data processing device.

[0104] The first angle adjustment device is an angle-adjustable light reflection device, which projects the ground light signal (remote sensing detection signal and first laser signal) to the preprocessing device. In other words, remote sensing and laser share the first angle adjustment device.

[0105] This embodiment does not limit the specific implementation method of an angle adjustment device, such as a two-dimensional swing mirror, a two-dimensional turntable, etc.

[0106] Taking the two-dimensional swing mirror as an example, by adjusting the direction of the optical axis of the two-dimensional swing mirror (adjusting the link angle), the coarse tracking of the laser communication direction can be achieved, and the range of ground remote sensing imaging can also be expanded. In the absence of ground laser communication, wide-area remote sensing images can be obtained by controlling the two-dimensional swing mirror to enter the circular scanning mode.

[0107] This embodiment does not specifically limit the remote sensing detection signal and the first laser signal. For example, an infrared band is used as the spectrum band for laser communication (i.e., the first laser signal is an infrared light signal), and a visible spectrum band is used as the main imaging spectrum band for remote sensing (i.e., the remote sensing detection signal is a visible light signal).

[0108] The above-mentioned pre-processing device is responsible for focusing the signal and splitting the remote sensing and laser. It is also a device shared by remote sensing and laser.

[0109] The remote sensing detection subsystem is a module dedicated to remote sensing, which performs signal conversion on the first optical path (converts optical signals into electrical signals) to obtain remote sensing image digital signals; and sends the remote sensing image digital signals to a data processing device for further analysis and processing;

[0110] The above-mentioned data processing device is a module that integrates remote sensing and laser information, and opens up the information flow of laser communication and remote sensing imaging. The data processing device extracts information from the remote sensing image digital signal to obtain the link reference data required by the laser; based on the link reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link angle. In addition, the data processing device can also store the remote sensing image digital signal and transmit it to the ground for further analysis.

[0111] The laser subsystem is a module dedicated to lasers. Since lasers do not require imaging, there is no need to focus the laser signal. By restoring the second optical path to the first laser signal, the original laser before focusing is obtained. The laser reception data is obtained by processing the first laser signal and sent to the data processing device.

[0112] The data processing device saves the laser received data and forwards it to the satellite platform for processing. It can also send data to the ground according to the requirements of the satellite platform.

[0113] Above Figure 1This is only an exemplary description of the integrated laser remote sensing machine. In practice, other devices are also provided in the integrated laser remote sensing machine, which will not be described in detail here.

[0114] The above scheme integrates the two capabilities of laser communication and remote sensing imaging through an integrated setting of laser remote sensing, thereby reducing the occupied volume and improving the functional density of the payload; through the integration of some devices, laser communication and remote sensing imaging share the first angle adjustment device, preprocessing device and data processing device, reducing the overhead caused by data transmission between different devices and effectively improving data processing efficiency; in addition, the data processing device obtains reference data for guiding link establishment (link establishment reference data) by extracting information from the high-resolution remote sensing image digital signal; based on the link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, thereby reducing the system pointing error and improving the link establishment efficiency and success rate.

[0115] In practice, with the increase in the number of remote sensing satellites in orbit and the development of technologies such as large-aperture optics and high-resolution cameras, the quality of remote sensing images obtained by satellite systems is getting higher and higher, and the demand for large-capacity data transmission is growing exponentially. However, the current traditional satellite-to-ground communication technology based on microwaves is limited by bandwidth, and it is difficult to significantly increase the data transmission capacity and rate. Therefore, the transmission of massive data has become a key factor restricting the development of earth remote sensing application technology.

[0116] See also Figure 2 As shown, in some optional implementation manners, the data processing device is also used for:

[0117] Sending downlink remote sensing data to the laser subsystem;

[0118] The laser subsystem is further used to generate a second laser signal corresponding to the downlink remote sensing data, and transmit the second laser signal to the first angle adjustment device;

[0119] The first angle adjustment device is also used to project the second laser signal onto the ground.

[0120] In this embodiment, the laser subsystem converts the downlink remote sensing data into a second laser signal, and provides a fast downlink channel for massive remote sensing data through a high-speed laser link without occupying other communication bandwidth resources.

[0121] This embodiment does not specifically limit the above-mentioned downlink remote sensing data, such as including remote sensing image digital signals, that is, the data processing device sends the remote sensing image digital signals directly to the laser subsystem in a transparent forwarding mode and transmits them down to the ground, thereby realizing a quasi-real-time situation awareness working mode by imaging and transmitting them down at the same time.

[0122] The above solution provides a fast channel for sending massive amounts of remote sensing data through a high-speed laser link, which can effectively reduce the data storage pressure of the satellite platform, while improving the timeliness of remote sensing data application and solving the problem of limited bandwidth in satellite-to-ground communications.

[0123] See also Figure 3 As shown, this embodiment provides a second laser remote sensing integrated machine, including: a first angle adjustment device, a main optical system, a spectroscopic device, a remote sensing detection subsystem, a laser subsystem and a data processing device.

[0124] In this embodiment, the pre-processing device includes a main optical system and a spectroscopic device;

[0125] The main optical system is used to focus the remote sensing detection signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path;

[0126] The light splitting device is used to transmit the first light path to the remote sensing detection subsystem; and transmit the second light path to the laser subsystem.

[0127] In this embodiment, the main optical system focuses the received remote sensing detection signal and the first laser signal respectively to form two optical paths; then the first optical path corresponding to the remote sensing is transmitted to the remote sensing detection subsystem through the spectrometer, and the second optical path corresponding to the laser is transmitted to the laser subsystem.

[0128] See also Figure 4 As shown, this embodiment provides a third laser remote sensing integrated machine, including: a first angle adjustment device, a main optical system, a spectrometer, a remote sensing detection subsystem, an ATP subsystem, a laser communicator and a data processing device.

[0129] In this embodiment, the laser subsystem includes an ATP subsystem and a laser communication machine;

[0130] The ATP subsystem is used to restore the second optical path to a first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communicator;

[0131] The laser communicator is used to modulate and demodulate the first laser signal to obtain the laser reception data.

[0132] Exemplarily, the optical antenna in the ATP subsystem implements the design of the laser light transmission and reception path, and forms the second optical path into a light beam required for laser communication;

[0133] The ATP unit in the ATP subsystem realizes the capture, tracking and aiming capabilities between laser terminals, and performs the capture and maintenance of laser communication links;

[0134] Laser communication equipment realizes functions such as modulation and demodulation of photoelectric signals, transmission and reception of optical signals, etc.

[0135] See also Figure 4 As shown, in some optional implementations, the data processing device is provided with computing boards such as a laser management FPGA, a remote sensing management FPGA, and an image processing chip.

[0136] Among them, after receiving the original imaging data (remote sensing image digital signal), the remote sensing management FPGA forwards the remote sensing image digital signal to the satellite platform's storage unit for data storage, and at the same time forwards it to the image processing chip to interpret the remote sensing image and extract the information required for link establishment (such as the above-mentioned link establishment reference data). In the process of the satellite and ground laser terminal trying to establish a link, the image processing chip sends the extracted link establishment reference data to the laser management FPGA, and the laser management FPGA guides the ATP subsystem to establish a link based on the link establishment reference data. The laser management FPGA receives the laser reception data sent by the laser communicator and forwards it to the satellite platform (such as forwarding it to the satellite platform's storage unit for data storage), and sends the downlink laser data to the ground according to the requirements of the satellite platform.

[0137] As described above, in some embodiments, the downlink remote sensing data includes a remote sensing image digital signal, and the data processing device needs to send the remote sensing image digital signal directly to the laser subsystem in a transparent forwarding mode. Based on this, after the satellite-to-ground laser communication link is established, the remote sensing management FPGA can directly forward the remote sensing image digital signal to the laser management FPGA, and the laser management FPGA sends the remote sensing image digital signal directly to the laser subsystem, realizing quasi-real-time data downlink in a transparent forwarding mode, so that the ground system can quickly obtain the surrounding situation.

[0138] The laser management FPGA, remote sensing management FPGA, and image processing chip in the above-mentioned data processing device are only exemplary illustrations. In implementation, other computing boards may be used in the data processing device to realize functions such as data forwarding, information extraction, and data storage, which will not be repeated here.

[0139] In some optional implementation manners, the data processing device is specifically used to:

[0140] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0141] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the link building angle.

[0142] As mentioned above, there are systematic errors in the optical antenna pointing, which leads to long link establishment time and low link establishment success rate.

[0143] In addition, some climate factors can also affect laser transmission. For example, atmospheric turbulence, clouds and fog have a great impact on satellite-to-ground laser communication links. For the uplink, the laser beam diverges less during transmission in the atmosphere and is greatly affected by the atmospheric turbulence effect, which manifests as off-axis flickering at the receiving end; for the downlink, the light spot has already diverged greatly when entering the atmosphere, which is mainly manifested as laser light intensity flickering and wavefront distortion at the receiving end of the optical ground equipment.

[0144] See also Figure 5 As shown, there is no influence of atmospheric turbulence, clouds, etc. in the ground station area (ground station 1) in some remote sensing image digital signals;

[0145] See also Figure 6 As shown, some remote sensing image digital signals have the influence of clouds and fog in the ground station area (ground station 2);

[0146] See also Figure 7 As shown, some remote sensing image digital signals in the ground station area (ground station 3) are affected by atmospheric turbulence.

[0147] Based on this, this embodiment performs two-dimensional analysis based on high-resolution remote sensing image digital signals, and obtains second link building reference data representing the position (of ground equipment) by extracting ground equipment features; and obtains first link building reference data representing the climate by extracting climate signs.

[0148] This embodiment does not specifically limit the first link establishment reference data and the second link establishment reference data. Exemplarily, after determining the image position information of the ground device, the actual position of the ground device is used as the second link establishment reference data, or the direction of the satellite relative to the ground device is used as the second link establishment reference data; whether the ground station area has target climate characteristics (such as whether there are atmospheric turbulence and other characteristics that affect link establishment) and the level of the target climate characteristics (such as the severity of atmospheric turbulence) are used as the first link establishment reference data, or the satellite-to-ground laser link quality is evaluated based on multiple climate indicators, and the satellite-to-ground laser link quality information is used as the first link establishment reference data.

[0149] Since the optical antenna pointing system error and climate will affect the laser link establishment, based on this, referring to the first link establishment reference data and the second link establishment reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the link establishment angle, so that the link establishment can be performed more efficiently and accurately.

[0150] In some optional implementation manners, the data processing device is specifically used to:

[0151] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0152] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0153] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0154] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0155] In practice, ground devices are distributed in different areas, and atmospheric turbulence usually only occurs in some areas; based on this, this embodiment first selects candidate devices from the ground devices corresponding to the remote sensing image digital signal based on the first link building reference data. In other words, it seeks a transmission window for laser communication that is less affected by climate, and reduces the impact of factors such as atmospheric turbulence on satellite-to-ground laser communication.

[0156] Since there may be multiple candidate devices (there are multiple candidate devices that are not affected by climate or are less affected by climate), it is necessary to select the target device that will eventually achieve laser communication;

[0157] Based on the second link building reference data, a target device with a suitable location and less affected by the climate can be selected from the candidate devices.

[0158] After selecting the target device, direction guidance is performed based on the second link building reference data. In implementation, the data processing device can determine the first link building angle corresponding to the first angle adjustment device and the second link building angle corresponding to the second angle adjustment device according to the second link building reference data of the target device; then adjust the link building angle of the first angle adjustment device based on the first link building angle; and adjust the link building angle of the second angle adjustment device based on the second link building angle. Direction guidance through the second link building reference data can make it possible to adjust the link building angle more accurately, thereby improving the link building efficiency and accuracy.

[0159] In some optional implementation manners, the data processing device is specifically used to:

[0160] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0161] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0162] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0163] The process of selecting the target device may refer to the above embodiment and will not be described in detail here.

[0164] After selecting the target device, direction guidance is performed based on the second link establishment reference data. In implementation, the data processing device can send the second link establishment reference data of the target device to the control platform of the satellite, and the control platform can make more systematic adjustments, such as referring to other factors of the satellite to determine the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; adjust the link establishment angle of the first angle adjustment device based on the third link establishment angle; and adjust the link establishment angle of the second angle adjustment device based on the fourth link establishment angle. Direction guidance through the second link establishment reference data can make it possible to adjust the link establishment angle more accurately, thereby improving the efficiency and accuracy of link establishment.

[0165] like Figure 8 As shown, based on the same inventive concept, an embodiment of the present application provides a data processing method, which is applied to the above-mentioned data processing device, including:

[0166] Step S801: extracting information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain link building reference data;

[0167] Step S802: controlling the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data.

[0168] In the above scheme, the data processing device extracts information from the high-resolution remote sensing image digital signal to obtain reference data for guiding link establishment (link establishment reference data); based on the link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, thereby reducing the system pointing error and improving the link establishment efficiency and success rate.

[0169] See also Fig. 9 As shown, the embodiment of the present application provides a second data processing method, including:

[0170] Step S901: extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain link building reference data.

[0171] Step S902: Controlling the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data.

[0172] Step S903: Send the downlink remote sensing data to the laser subsystem so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

[0173] This embodiment does not limit the order of steps S901 to S902 and step S903. Steps S901 to S902 may be performed first, or step S903 may be performed first, or steps S901 to S902 and step S903 may be performed in parallel.

[0174] In the case where the downlink remote sensing data is a remote sensing image digital signal, it is necessary to first execute steps S901 to S902 and then execute step S903.

[0175] The above solution provides a fast channel for sending massive amounts of remote sensing data through a high-speed laser link, which can effectively reduce the data storage pressure of the satellite platform, while improving the timeliness of remote sensing data application and solving the problem of limited bandwidth in satellite-to-ground communications.

[0176] See also Fig.10 As shown, the embodiment of the present application provides a third data processing method, including:

[0177] Step S1001: extracting information from the remote sensing image digital signal to obtain first link building reference data representing climate and second link building reference data representing location;

[0178] Step S1002: Based on the first link building reference data and the second link building reference data, control the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link building angle.

[0179] See also Fig.11 As shown, the embodiment of the present application provides a fourth data processing method, including:

[0180] Step S1101: extracting information from the remote sensing image digital signal to obtain first link building reference data representing climate and second link building reference data representing location;

[0181] Step S1102: selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0182] Step S1103: selecting a target device from the candidate devices based on the second link building reference data;

[0183] Step S1104: determining a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device according to the second link establishment reference data of the target device;

[0184] Step S1105: adjusting the first angle adjustment device for a link building angle based on the first link building angle; and adjusting the second angle adjustment device for a link building angle based on the second link building angle.

[0185] See also Fig.12 As shown, the embodiment of the present application provides a fifth data processing method, including:

[0186] Step S1201: extracting information from the remote sensing image digital signal to obtain first link building reference data representing climate and second link building reference data representing location;

[0187] Step S1202: selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0188] Step S1203: selecting a target device from the candidate devices based on the second link building reference data;

[0189] Step S1204: Send the second link establishment reference data of the target device to the control platform of the satellite, and determine the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device through the control platform; adjust the link establishment angle of the first angle adjustment device based on the third link establishment angle; and adjust the link establishment angle of the second angle adjustment device based on the fourth link establishment angle.

[0190] The specific implementation of the data processing method embodiment can refer to the implementation of the above-mentioned laser remote sensing integrated machine, and the repeated parts will not be repeated.

[0191] like Fig.13 As shown, based on the same inventive concept, an embodiment of the present application provides a data processing device 1300, which includes:

[0192] The information extraction module 1301 is used to extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data;

[0193] The laser processing module 1302 is used to control the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data.

[0194] Some optional implementations further include a remote sensing processing module 1303, which is used to:

[0195] The downlink remote sensing data is sent to the laser subsystem, so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

[0196] In some optional implementation manners, the information extraction module 1301 is specifically used to:

[0197] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0198] The laser processing module 1302 is specifically used for:

[0199] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link building angle.

[0200] In some optional implementations, the laser processing module 1302 is specifically configured to:

[0201] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0202] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0203] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0204] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0205] In some optional implementations, the laser processing module 1302 is specifically configured to:

[0206] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0207] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0208] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0209] The specific implementation method of the data processing device method embodiment can refer to the implementation of the above-mentioned laser remote sensing integrated machine, and the repeated parts will not be repeated.

[0210] like Fig.14 As shown, based on the same inventive concept, an embodiment of the present application provides an electronic device 1400, including: a processor 1401 and a memory 1402;

[0211] The memory 1402 may be a volatile memory, such as a random-access memory (RAM); the memory 1402 may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); or the memory 1402 may be any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1402 may be a combination of the above memories.

[0212] The processor 1401 may include one or more CPUs, graphics processing units (GPUs) or digital processing units, etc.

[0213] The specific connection medium between the memory 1402 and the processor 1401 is not limited in the embodiment of the present application. Fig.14 In the embodiment, the memory 1402 and the processor 1401 are connected via a bus 1403. The bus 1403 is connected to the processor 1401 via a bus 1403. Fig.14 In the figure, the bus 1403 is shown by a bold line, and can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.14 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0214] The memory 1402 stores a program code. When the program code is executed by the processor 1401, the processor 1401 executes:

[0215] Extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data;

[0216] The first angle adjustment device and the laser subsystem are controlled to adjust the link building angle based on the link building reference data.

[0217] In some optional implementations, the processor 1401 further executes:

[0218] The downlink remote sensing data is sent to the laser subsystem, so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

[0219] In some optional implementation manners, the processor 1401 specifically performs:

[0220] Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location;

[0221] Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link building angle.

[0222] In some optional implementation manners, the processor 1401 specifically performs:

[0223] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0224] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0225] Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device;

[0226] The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

[0227] In some optional implementation manners, the processor 1401 specifically performs:

[0228] Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data;

[0229] Selecting a target device from the candidate devices based on the second link establishment reference data;

[0230] The second link establishment reference data of the target device is sent to a control platform of the satellite, and a third link establishment angle corresponding to the first angle adjustment device and a fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

[0231] The embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned data processing method or the above-mentioned data transmission method are implemented. The readable storage medium may be a non-volatile readable storage medium.

[0232] The present application is described above with reference to the block diagrams and / or flow charts showing the methods, devices (systems) and / or computer program products according to the embodiments of the present application. It should be understood that a block of the block diagram and / or flow chart diagram and a combination of blocks of the block diagram and / or flow chart diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer and / or other programmable devices to produce a machine, so that the instructions executed by the computer processor and / or other programmable devices create a method for implementing the functions / actions specified in the block diagram and / or flow chart block.

[0233] Accordingly, the present application may also be implemented in hardware and / or software (including firmware, resident software, microcode, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium for use by an instruction execution system or in conjunction with an instruction execution system. In the context of the present application, a computer-usable or computer-readable medium may be any medium that may contain, store, communicate, transmit, or convey a program for use by an instruction execution system, device, or apparatus, or in conjunction with an instruction execution system, device, or apparatus.

[0234] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0235] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A laser remote sensing integrated machine, characterized in that: include: A first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem, and a data processing device; The first angle adjustment device is used to project the remote sensing detection signal and the first laser signal to the pre-processing device; The preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and transmit the second optical path corresponding to the first laser signal to the laser subsystem; The remote sensing detection subsystem is used to perform signal conversion on the first optical path to obtain a remote sensing image digital signal, and send the remote sensing image digital signal to the data processing device; The data processing device is used to extract information from the remote sensing image digital signal to obtain link building reference data; based on the link building reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link building angle; The laser subsystem is used to restore the second optical path to a first laser signal, and send the laser receiving data corresponding to the first laser signal to the data processing device; The data processing device is also used for: Sending downlink remote sensing data to the laser subsystem; The laser subsystem is further used to generate a second laser signal corresponding to the downlink remote sensing data, and transmit the second laser signal to the first angle adjustment device; The first angle adjustment device is also used to project the second laser signal onto the ground.

2. The integrated laser remote sensing device according to claim 1, characterized in that: The pre-processing device includes a main optical system and a light splitting device; The main optical system is used to focus the remote sensing detection signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path; The light splitting device is used to transmit the first light path to the remote sensing detection subsystem; and transmit the second light path to the laser subsystem.

3. The integrated laser remote sensing device according to claim 1, characterized in that: The laser subsystem includes an acquisition tracking alignment ATP subsystem and a laser communication machine; The ATP subsystem is used to restore the second optical path to a first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communicator; The laser communicator is used to modulate and demodulate the first laser signal to obtain the laser reception data.

4. The integrated laser remote sensing device according to claim 3, characterized in that: The data processing device is specifically used for: Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location; Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the link building angle.

5. The integrated laser remote sensing device according to claim 4, characterized in that: The data processing device is specifically used for: Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data; Selecting a target device from the candidate devices based on the second link establishment reference data; Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device; The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

6. The integrated laser remote sensing device according to claim 4, characterized in that: The data processing device is specifically used for: Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data; Selecting a target device from the candidate devices based on the second link establishment reference data; The second link establishment reference data of the target device is sent to the control platform of the satellite, and the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

7. The integrated laser remote sensing device according to any one of claims 1 to 6, characterized in that: The data processing device includes part or all of a laser management field programmable gate array FPGA, a remote sensing management FPGA and an image processing chip.

8. A data transmission method, characterized in that: Data transmission is performed by using the laser remote sensing integrated machine as described in any one of claims 1 to 7.

9. A data processing method, characterized in that: A data processing device used in a laser remote sensing integrated machine as claimed in any one of claims 1 to 7, comprising: Extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data; Controlling the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data; Also includes: The downlink remote sensing data is sent to the laser subsystem, so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data, and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal to the ground through the first angle adjustment device.

10. The method according to claim 9, characterized in that Extract information from the remote sensing image digital signal sent by the remote sensing detection subsystem to obtain the link building reference data, including: Extracting information from the remote sensing image digital signal to obtain first link building reference data representing the climate and second link building reference data representing the location; Controlling the first angle adjustment device and the laser subsystem to adjust the link building angle based on the link building reference data includes: Based on the first link building reference data and the second link building reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link building angle.

11. The method according to claim 10, characterized in that Based on the first link building reference data and the second link building reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link building angle includes: Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data; Selecting a target device from the candidate devices based on the second link establishment reference data; Determine, according to the second link establishment reference data of the target device, a first link establishment angle corresponding to the first angle adjustment device and a second link establishment angle corresponding to the second angle adjustment device; The first angle adjustment device is adjusted for a link building angle based on the first link building angle; and the second angle adjustment device is adjusted for a link building angle based on the second link building angle.

12. The method according to claim 10, characterized in that Based on the first link building reference data and the second link building reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link building angle includes: Selecting a candidate device from ground devices corresponding to the remote sensing image digital signal based on the first link establishment reference data; Selecting a target device from the candidate devices based on the second link establishment reference data; The second link establishment reference data of the target device is sent to the control platform of the satellite, and the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device are determined by the control platform; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.

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