Atmosphere synchronous correction system

Abstract

The invention provides an atmosphere synchronous correction system, and the system comprises an atmosphere detector which is disposed on an aviation platform, and is used for synchronously collecting atmosphere light information at a sampling moment, and outputting a digital signal according to the atmosphere light information; the atmospheric detector and the remote sensor have the same detection view field and visiting direction; the atmospheric parameter processor is installed on the aviation platform and used for receiving the digital signals and the auxiliary data and obtaining atmospheric correction parameters according to the digital signals and the auxiliary data; wherein the aviation platform is used for receiving an atmospheric correction parameter and a remote sensing image, and correcting the remote sensing image according to the atmospheric correction parameter; according to the atmospheric synchronous correction system provided by the invention, the atmospheric light information and the remote sensing image are synchronously acquired, and the remote sensing image is corrected according to the atmospheric correction parameters, so that atmospheric correction and data processing on an aviation platform can be realized, and the remote sensing image correction efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of atmosphere correction, and in particular to an atmosphere synchronous correction system. Background Art

[0002] Atmospheric correction is an important concept in remote sensing technology, and it plays a vital role in image processing and analysis. Atmospheric correction refers to extracting the true reflectance information of ground objects by removing the disturbance caused by the atmospheric medium in the image. In remote sensing images, the atmospheric medium will absorb and scatter the reflected light of the ground objects to a certain extent, and will also produce atmospheric scattering and multiple reflections of solar radiation. These effects make the distribution of the reflectance of ground objects in remote sensing images not completely accurate and difficult to be directly used for remote sensing applications. Therefore, atmospheric correction is needed to eliminate these effects so that the image can better reflect the real information of the surface. The atmospheric correction processing of traditional remote sensing images is carried out on the ground. After the atmospheric sounder obtains data in orbit, the data is compressed and transmitted to the ground receiving station via the satellite platform, and then transmitted from the ground station to the data processing center for processing, including data preprocessing, atmospheric parameter calculation and remote sensing image atmospheric correction.

[0003] At present, the traditional method of atmospheric correction of remote sensing images is usually carried out on the ground. This method requires the atmospheric detection data and optical remote sensing image data to be transmitted to the ground, and data preprocessing and remote sensing image atmospheric correction must be performed at the ground data processing center. This method has problems such as poor timeliness and long time consumption. Summary of the invention

[0004] The purpose of the present invention is to provide an atmospheric synchronous correction system that can solve the above-mentioned problem: "The traditional method of atmospheric correction of remote sensing images is usually carried out on the ground. This method requires the atmospheric detection data and optical remote sensing image data to be transmitted to the ground, and data preprocessing, remote sensing image atmospheric correction and other processing are performed in the ground data processing center, which has the problems of poor timeliness and long time consumption."

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention provides an atmospheric synchronous correction system, comprising:

[0007] Aviation platforms, used to obtain auxiliary data;

[0008] A remote sensor, installed on the aerial platform, for collecting remote sensing images at the sampling time;

[0009] An atmospheric detector installed on the aviation platform, used for synchronously collecting atmospheric light information at the sampling time, and outputting a digital signal according to the atmospheric light information; the atmospheric detector and the remote sensor have the same detection field of view and viewing direction;

[0010] An atmospheric parameter processor, installed on the aviation platform, for receiving the digital signal and the auxiliary data, and obtaining an atmospheric correction parameter according to the digital signal and the auxiliary data;

[0011] The aviation platform is used to receive the atmospheric correction parameters and the remote sensing image, and correct the remote sensing image according to the atmospheric correction parameters.

[0012] In one embodiment of the present invention, the atmospheric detector comprises:

[0013] A light detection unit, the light detection unit is used to synchronously collect atmospheric light information at the sampling time and obtain an electrical signal according to the atmospheric light information;

[0014] A detector focal plane circuit, used for amplifying the electrical signal to obtain an amplified signal;

[0015] A signal acquisition circuit is used to obtain the digital signal according to the amplified signal.

[0016] In one embodiment of the present invention, the electrical signal includes an intensity electrical signal and a polarization electrical signal, and the light detection unit includes:

[0017] An intensity detection channel, used for obtaining the intensity electrical signal according to the atmospheric light information;

[0018] The polarization detection channel group is used to obtain the polarization electrical signal according to the atmospheric light information.

[0019] In one embodiment of the present invention, the strength electrical signal includes a first strength electrical signal and a second strength electrical signal;

[0020] The intensity detection channel comprises:

[0021] A first intensity detection channel, used for obtaining the first intensity electrical signal according to the atmospheric light information in the first visible near-infrared band;

[0022] The second intensity detection channel is used to obtain the second intensity electrical signal according to the atmospheric light information in the first short-wave infrared band.

[0023] In one embodiment of the present invention, the polarized electrical signal includes a first polarized electrical signal, a second polarized electrical signal, a third polarized electrical signal and a fourth polarized electrical signal;

[0024] The polarization detection channel group includes:

[0025] A first polarization detection channel group, used for obtaining the first polarization electrical signal according to the atmospheric light information in the second visible near-infrared band;

[0026] A second polarization detection channel group, used for obtaining the second polarization electrical signal according to the atmospheric light information in the third visible near-infrared band;

[0027] A third polarization detection channel group, used for obtaining the third polarization electrical signal according to the atmospheric light information in the fourth visible near-infrared band;

[0028] The fourth polarization detection channel group is used to obtain the fourth polarization electrical signal according to the atmospheric light information in the second short-wave infrared band.

[0029] Among them, the sizes of the bands corresponding to the second visible near-infrared band, the third visible near-infrared band and the fourth visible near-infrared band are different.

[0030] In one embodiment of the present invention, the first intensity detection channel and the second intensity detection channel respectively include a first protective glass, a first filter, a first imaging lens group and a first detector which are coaxially arranged along the optical axis.

[0031] In one embodiment of the present invention, the first polarization detection channel group, the second polarization detection channel group, the third polarization detection channel group and the fourth polarization detection channel group respectively include three adjacent polarization detection channels;

[0032] The polarization detection channel comprises a second protective glass, a polarizer, a second filter, a second imaging lens group and a second detector which are coaxially arranged along the optical axis in sequence;

[0033] Wherein, the included angle between any two polarizers in three adjacent polarization detection channels is 60°.

[0034] In one embodiment of the present invention, the first detector in the second intensity detection channel and the three second detectors in the fourth polarization detection channel group are refrigerated detectors;

[0035] The system further comprises:

[0036] a temperature control unit, electrically connected to the refrigeration detector, for detecting a current temperature of the refrigeration detector and adjusting the temperature of the refrigeration detector according to the current temperature;

[0037] The heat sink is fitted with the refrigeration detector.

[0038] In one embodiment of the present invention, the amplified signal includes a first amplified signal and a second amplified signal, and the detector focal plane circuit includes:

[0039] a first focal plane circuit, electrically connected to the first detector in the first intensity detection channel, the three second detectors in the first polarization detection channel group, the three second detectors in the second polarization detection channel group, and the three second detectors in the third polarization detection channel group, and configured to obtain the first amplified signal according to the first intensity electrical signal, the first polarization electrical signal, the second polarization electrical signal, and the third polarization electrical signal;

[0040] The second focal plane circuit is electrically connected to the first detector in the second intensity detection channel and the three second detectors in the fourth polarization detection channel group, and is used to obtain the second amplified signal according to the second intensity electrical signal and the fourth polarization electrical signal.

[0041] In one embodiment of the present invention, the atmospheric parameter processor includes:

[0042] A main controller, connected to the aviation platform, for sending different control signals and transmitting the atmospheric correction parameters to the aviation platform;

[0043] The calculator is electrically connected to the main controller and is used for processing the digital signal and the auxiliary data to obtain the atmospheric parameters according to different control signals, and for processing the atmospheric parameters and the auxiliary data to obtain the atmospheric correction parameters.

[0044] As described above, the present invention provides an atmospheric synchronous correction system, which is provided with an atmospheric detector installed on an aviation platform, which is used to synchronously collect atmospheric light information at the sampling time, and output a digital signal according to the atmospheric light information, and is provided with an atmospheric parameter processor installed on the aviation platform, which is used to receive digital signals and auxiliary data, and obtain atmospheric correction parameters according to the digital signals and auxiliary data. The present application can realize atmospheric correction and data processing on an aviation platform by synchronously collecting atmospheric light information and remote sensing images, and correcting remote sensing images according to atmospheric correction parameters, which is beneficial to improving the efficiency of remote sensing image correction.

[0045] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0047] Figure 1It is an overall schematic diagram of an atmospheric synchronous correction system in one embodiment of the present invention;

[0048] Figure 2 It is a structural schematic diagram of an atmospheric detector and an atmospheric parameter processor of an atmospheric synchronous correction system in one embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the composition of an atmospheric detector of an atmospheric synchronous correction system in one embodiment of the present invention;

[0050] Figure 4 A schematic diagram of the composition of a calculator of an atmospheric synchronous correction system in one embodiment of the present invention;

[0051] Figure 5 A schematic diagram of the composition of a main controller of an atmospheric synchronous correction system in one embodiment of the present invention;

[0052] Figure 6 A schematic diagram of the composition of a calculator of an atmospheric synchronous correction system in one embodiment of the present invention;

[0053] In the figure:

[0054] 10-Aviation platform;

[0055] 20-cable;

[0056] 30-atmospheric detector, 31-light detection unit, 310-intensity detection channel, 3100-first protective glass, 3101-first filter, 3102-first imaging lens group, 3103-first detector, 311-polarization detection channel group, 3110-second protective glass, 3111-polarizer, 3112-second filter, 3113-second imaging lens group, 3114-second detector, 32-detector focal plane circuit, 320-first focal plane circuit, 321-second focal plane circuit, 33-signal acquisition circuit, 34-optical lens barrel structure;

[0057] 40-atmospheric parameter processor, 41-main controller, 410-main control circuit, 411-first inter-board connector, 412-external bus connector, 413-first data connector, 42-calculator, 420-calculation circuit board, 421-second inter-board connector, 422-second data connector;

[0058] 50-Heat sink. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Refer to the attached Figure 1-6 An atmospheric synchronous correction system according to the first embodiment of the present application is exemplarily described. The atmospheric synchronous correction system comprises: an aviation platform 10, an atmospheric detector 30, an atmospheric parameter processor 40 and a remote sensor.

[0061] The aviation platform 10 is used to obtain auxiliary data; the remote sensor is installed on the aviation platform 10, and is used to collect remote sensing images at the sampling time; the atmospheric detector 30 is installed on the aviation platform 10, and is used to synchronously collect atmospheric light information at the sampling time, and output digital signals according to the atmospheric light information; the atmospheric detector 30 and the remote sensor have the same detection field of view and viewing direction; the atmospheric parameter processor 40 is installed on the aviation platform 10, and is used to receive digital signals and auxiliary data, and obtain atmospheric correction parameters according to the digital signals and auxiliary data; wherein, the aviation platform 10 is used to receive atmospheric correction parameters and remote sensing images, and correct the remote sensing images according to the atmospheric correction parameters.

[0062] In the embodiment of the present application, the aviation platform 10 is used to obtain auxiliary data. The aviation platform 10 refers to a carrier or flying device that can carry and operate various devices. For example, the aviation platform 10 is a satellite platform. The auxiliary data is the original data related to the attitude orbit of the satellite platform.

[0063] In the embodiment of the present application, the remote sensor is installed on the aviation platform 10, and is used to collect remote sensing images at the sampling time. The atmospheric detector 30 is installed on the aviation platform 10, and is used to synchronously collect atmospheric light information at the sampling time, and output a digital signal according to the atmospheric light information; the atmospheric detector 30 and the remote sensor have the same detection field and viewing direction.

[0064] The atmospheric detector 30, the atmospheric parameter processor 40 and the corrected payload (remote sensor) work synchronously on the same platform, with the same field of view direction, and the field of view of the atmospheric detector 30 covers the corrected payload to obtain atmospheric light information that matches the sampling time and sampling space of the remote sensor. The present application can be used for on-board real-time atmospheric correction and data processing by synchronously collecting atmospheric light information and remote sensing images, and correcting the remote sensing images according to atmospheric correction parameters, which can improve the quality of remote sensing images and the efficiency of remote sensing image correction.

[0065] In the embodiment of the present application, the atmospheric detector 30 includes a light detection unit 31, a detector focal plane circuit 32 and a signal acquisition circuit 33. The light detection unit 31 can be installed in an optical lens barrel structure 34. The light detection unit 31 is used to synchronously collect atmospheric light information at the sampling time and obtain an electrical signal based on the atmospheric light information; the detector focal plane circuit 32 is used to amplify the electrical signal to obtain an amplified signal; the signal acquisition circuit 33 is used to obtain a digital signal based on the amplified signal.

[0066] In the embodiment of the present application, the electrical signal includes an intensity electrical signal and a polarization electrical signal. The light detection unit 31 includes an intensity detection channel 310 and a polarization detection channel group 311. The intensity detection channel 310 is used to obtain the intensity electrical signal based on the atmospheric light information, and the polarization detection channel group 311 is used to obtain the polarization electrical signal based on the atmospheric light information.

[0067] The intensity detection channel 310 can be used to measure the intensity information of light, while the polarization detection channel group 311 can be used to detect the polarization characteristics of light. The combination of the intensity detection channel 310 and the polarization detection channel group 311 can more comprehensively and accurately obtain and analyze atmospheric light information.

[0068] Specifically, the intensity electrical signal includes a first intensity electrical signal and a second intensity electrical signal; the intensity detection channel 310 includes a first intensity detection channel and a second intensity detection channel, the first intensity detection channel is used to obtain the first intensity electrical signal based on the atmospheric light information in the first visible near-infrared band, and the second intensity detection channel is used to obtain the second intensity electrical signal based on the atmospheric light information in the first short-wave infrared band.

[0069] For example, the first visible near infrared band may be a 910 nm band, and the first short-wave infrared band may be a 1380 nm band. Based on this, the first intensity detection channel may be used for water vapor column concentration measurement, and the second intensity detection channel has the ability to measure cirrus clouds and stratospheric aerosols.

[0070] Specifically, the polarization electric signal includes a first polarization electric signal, a second polarization electric signal, a third polarization electric signal and a fourth polarization electric signal; the polarization detection channel group 311 includes a first polarization detection channel group, a second polarization detection channel group, a third polarization detection channel group and a fourth polarization detection channel group, the first polarization detection channel group is used to obtain the first polarization electric signal according to the atmospheric light information of the second visible near-infrared band, the second polarization detection channel group is used to obtain the second polarization electric signal according to the atmospheric light information of the third visible near-infrared band, the third polarization detection channel group is used to obtain the third polarization electric signal according to the atmospheric light information of the fourth visible near-infrared band, and the fourth polarization detection channel group is used to obtain the fourth polarization electric signal according to the atmospheric light information of the second short-wave infrared band. Among them, the sizes of the bands corresponding to the second visible near-infrared band, the third visible near-infrared band and the fourth visible near-infrared band are different.

[0071] For example, the second visible near-infrared band can be a 490nm band, the third visible near-infrared band can be a 670nm band, the fourth visible near-infrared band can be an 870nm band, and the second short-wave infrared band can be a 1610nm band. Based on this, the first polarization detection channel group, the second polarization detection channel group, and the third polarization detection channel group can be used for aerosol parameter inversion, and the fourth polarization detection channel group can be used to estimate the surface polarization reflectivity to achieve ground-air separation.

[0072] In the examples of this application, see Figure 3 The first intensity detection channel and the second intensity detection channel respectively include a first protective glass 3100, a first filter 3101, a first imaging lens group 3102 and a first detector 3103 which are coaxially arranged along the optical axis.

[0073] See also Figure 3 The first polarization detection channel group, the second polarization detection channel group, the third polarization detection channel group and the fourth polarization detection channel group respectively include three adjacent polarization detection channels; the polarization detection channel includes a second protective glass 3110, a polarizer 3111, a second filter 3112, a second imaging lens group 3113 and a second detector 3114 which are coaxially arranged along the optical axis in sequence; wherein, the angle between any two polarizers 3111 in the three adjacent polarization detection channels is 60°.

[0074] It should be noted that, in practical applications, an angle of 60° is a common configuration, which can provide accurate and reliable polarization measurement results, so it will not be described in detail.

[0075] The polarizer 3111 in the polarization detection channel of the present application is located at the front end of the optical system, which is different from the placement position of the polarizer in the ordinary polarization measurement system (the polarizer in the ordinary polarization measurement system is placed in front of the detector), which can eliminate the influence of lenses, filters, stray light, etc. in the optical system on the polarization characteristics of the input light.

[0076] In an embodiment of the present application, the first detector 3103 in the second intensity detection channel and the three second detectors 3114 in the fourth polarization detection channel group adopt refrigeration detectors; the system also includes a temperature control unit and a heat sink 50, the temperature control unit is electrically connected to the refrigeration detector, and is used to detect the current temperature of the refrigeration detector and adjust the temperature of the refrigeration detector according to the current temperature, and the heat sink 50 is in contact with the refrigeration detector.

[0077] For example, the refrigerated detector is a refrigerated InGaAs (Indium Gallium Arsenide) detector, which is a high-performance photodetector that reduces dark current by lowering the operating temperature, improves the signal-to-noise ratio, and thus enhances detection sensitivity. The refrigerated InGaAs detector generally includes components such as an InGaAs photosensitive chip and a thermoelectric cooler (TEC). The refrigerated InGaAs detector is a common prior art in the art, so its components will not be described in detail.

[0078] For example, the temperature control unit includes a thermistor acquisition function and a TEC refrigerator control function, and can detect the current temperature of the cooling detector and adjust the temperature of the cooling detector according to the current temperature.

[0079] For example, the heat sink 50 is directly mounted on the optical lens barrel structure 34 , and the heat of the cooling detector is conveniently transferred through the heat sink and the optical lens barrel structure 34 .

[0080] In the embodiment of the present application, the amplified signal includes a first amplified signal and a second amplified signal, and the detector focal plane circuit 32 includes a first focal plane circuit 320 and a second focal plane circuit 321, the first focal plane circuit 320 is electrically connected to the first detector 3103 in the first intensity detection channel, the three second detectors 3114 in the first polarization detection channel group, the three second detectors 3114 in the second polarization detection channel group, and the three second detectors 3114 in the third polarization detection channel group, and is used to obtain the first amplified signal according to the first intensity electrical signal, the first polarization electrical signal, the second polarization electrical signal, and the third polarization electrical signal; the second focal plane circuit 321 is electrically connected to the first detector 3103 in the second intensity detection channel and the three second detectors 3114 in the fourth polarization detection channel group, and is used to obtain the second amplified signal according to the second intensity electrical signal and the fourth polarization electrical signal. The first focal plane circuit 320 and the second focal plane circuit 321 are respectively connected to different detectors to meet the signal processing requirements of different detectors.

[0081] In the embodiment of the present application, the atmospheric parameter processor 40 is installed on the aviation platform 10, and is used to receive the digital signal and the auxiliary data, and obtain the atmospheric correction parameters according to the digital signal and the auxiliary data.

[0082] Specifically, the atmospheric parameter processor 40 includes a main controller 41 and a calculator 42. The main controller 41 is connected to the aviation platform 10, and is used to send different control signals and transmit the atmospheric correction parameters to the aviation platform 10; the calculator 42 is electrically connected to the main controller 41, and is used to process the digital signal and the auxiliary data according to different control signals to obtain the atmospheric parameters, and to process the atmospheric parameters and the auxiliary data to obtain the atmospheric correction parameters.

[0083] By way of example, the atmospheric parameters may include aerosol optical thickness and water vapor column concentration, among others.

[0084] The auxiliary data used in the atmospheric parameter calculation and the auxiliary data used in the atmospheric correction parameter calculation process are all original data related to the attitude orbit of the satellite platform, and the aviation platform 10 can prepare the auxiliary data in advance. For example, the auxiliary data may include the observation azimuth, the observation zenith angle, the solar azimuth, the solar zenith angle, the longitude and latitude of the observation area, and the time, etc. The auxiliary data used in the atmospheric parameter calculation and the auxiliary data used in the atmospheric correction parameter calculation process are all auxiliary data for assisting the atmospheric parameter calculation and the atmospheric correction parameter calculation, and the auxiliary data are data that can be easily obtained by the aviation platform 10. In the present application, obtaining atmospheric parameters through digital signals and auxiliary data, and obtaining atmospheric correction parameters by processing atmospheric parameters and auxiliary data, belong to common technologies in the field, and will not be described in detail.

[0085] In the embodiment of the present application, the aviation platform 10 is used to receive the atmospheric correction parameters and the remote sensing image, and correct the remote sensing image according to the atmospheric correction parameters.

[0086] Atmospheric correction means that the total radiance of the ground target finally measured by the remote sensor is not a reflection of the true reflectivity of the surface, and includes radiation errors caused by atmospheric absorption, especially scattering. Atmospheric correction is the process of eliminating these radiation errors caused by atmospheric influences and inverting the true surface reflectivity of the ground object. Atmospheric correction parameters are used to correct remote sensing images to correct atmospheric effects and restore the true reflectivity or emissivity of the surface. In this application, the correction of remote sensing images by atmospheric correction parameters belongs to the common technology in this field, so it will not be described in detail.

[0087] For example, the calculator 42 uses an FPGA processor, uses a Nandflash memory (a non-volatile memory based on Nand technology) to store the database, uses a DDR memory (double rate synchronous dynamic random access memory) as the calculation memory, uses an internal parallel interface to transmit auxiliary data and atmospheric parameters and other data, and uses a high-speed interface to transmit the calculation results. The high-performance computing system based on FPGA in this application performs data preprocessing, atmospheric parameter calculation and atmospheric correction parameter calculation. Compared with the traditional PC-based system, it has a compact structure, high efficiency and low resource consumption. At the same time, this application uses Nandflash memory to store the database and performs high-speed calculations in DDR memory, which can effectively improve the calculation speed.

[0088] For example, see Figure 5The main controller 41 includes a main control circuit 410 board, a first inter-board connector 411, an external bus connector 412 and a first data connector 413. The external bus connector 412 and the first data connector 413 are arranged on the main control circuit 410 board, and the external bus connector 412 is used to receive auxiliary data; see Figure 4 The calculator 42 includes a computing circuit board 420, a second inter-board connector 421 and a second data connector 422. The second data connector 422 is arranged on the computing circuit board 420. The second inter-board connector 421 is connected to the first inter-board connector 411. The first data connector 413 and the second data connector 422 are used to realize data transmission between the main controller 41 and the calculator 42.

[0089] In the embodiment of the present application, the system further includes a power supply, which supplies power to the entire atmospheric synchronization correction system. Those skilled in the art can select a suitable power supply according to actual conditions.

[0090] In the embodiment of the present application, the atmospheric detector 30 is connected to the atmospheric parameter processor 40 via a cable 20, and the cable 20 can be used to realize data transmission and power supply. The atmospheric detector 30 and the atmospheric parameter processor 40 can also be electrically connected in other ways, which are not limited in the present application.

[0091] For example, an actual operation process of the present application is: power the atmospheric detector 30 and the atmospheric parameter processor 40 through a power supply and turn on the power; the main controller 41 completes self-test and parameter setting, the refrigerated detector starts to cool, and the calculator 42 starts to load the FPGA program; the main controller 41 receives the mission information and attitude and orbit estimation package sent by the satellite platform, and prepares for on-orbit processing. At the same time, the FPGA processor moves the database from the NandFlash memory to the DDR memory computing memory, and prepares to start calculation; wait for the refrigerated detector to be cooled and stabilized, and the atmospheric detector 30 starts to image the target area according to the mission information; the calculator 42 receives the digital signal transmitted by the atmospheric detector 30 in real time, completes data preprocessing, atmospheric parameter inversion and atmospheric correction parameter calculation; the calculator 42 sends the atmospheric correction parameters to the satellite platform for atmospheric correction of remote sensing images; the atmospheric detector 30 and the atmospheric parameter processor 40 complete the task, and after all the results are obtained through on-orbit processing, they are shut down.

[0092] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An atmospheric synchronous correction system, characterized in that: include: Aviation platforms, used to obtain auxiliary data; A remote sensor, installed on the aerial platform, for collecting remote sensing images at the sampling time; An atmospheric detector installed on the aviation platform, used for synchronously collecting atmospheric light information at the sampling time, and outputting a digital signal according to the atmospheric light information; the atmospheric detector and the remote sensor have the same detection field of view and viewing direction; An atmospheric parameter processor, installed on the aviation platform, for receiving the digital signal and the auxiliary data, and obtaining an atmospheric correction parameter according to the digital signal and the auxiliary data; The aviation platform is used to receive the atmospheric correction parameters and the remote sensing image, and correct the remote sensing image according to the atmospheric correction parameters.

2. The atmospheric synchronous correction system according to claim 1, characterized in that: The atmospheric detector comprises: A light detection unit, the light detection unit is used to synchronously collect atmospheric light information at the sampling time and obtain an electrical signal according to the atmospheric light information; A detector focal plane circuit, used for amplifying the electrical signal to obtain an amplified signal; A signal acquisition circuit is used to obtain the digital signal according to the amplified signal.

3. The atmospheric synchronous correction system according to claim 2, characterized in that: The electrical signal includes an intensity electrical signal and a polarization electrical signal, and the light detection unit includes: An intensity detection channel, used for obtaining the intensity electrical signal according to the atmospheric light information; The polarization detection channel group is used to obtain the polarization electrical signal according to the atmospheric light information.

4. The atmospheric synchronous correction system according to claim 3, characterized in that: The intensity electrical signal includes a first intensity electrical signal and a second intensity electrical signal; The intensity detection channel comprises: A first intensity detection channel, used for obtaining the first intensity electrical signal according to the atmospheric light information in the first visible near-infrared band; The second intensity detection channel is used to obtain the second intensity electrical signal according to the atmospheric light information in the first short-wave infrared band.

5. The atmospheric synchronous correction system according to claim 4, characterized in that: The polarized electrical signals include a first polarized electrical signal, a second polarized electrical signal, a third polarized electrical signal and a fourth polarized electrical signal; The polarization detection channel group includes: A first polarization detection channel group, used for obtaining the first polarization electrical signal according to the atmospheric light information in the second visible near-infrared band; A second polarization detection channel group, used for obtaining the second polarization electrical signal according to the atmospheric light information in the third visible near-infrared band; A third polarization detection channel group, used for obtaining the third polarization electrical signal according to the atmospheric light information in the fourth visible near-infrared band; The fourth polarization detection channel group is used to obtain the fourth polarization electrical signal according to the atmospheric light information in the second short-wave infrared band. Among them, the sizes of the bands corresponding to the second visible near-infrared band, the third visible near-infrared band and the fourth visible near-infrared band are different.

6. The atmospheric synchronous correction system according to claim 5, characterized in that: The first intensity detection channel and the second intensity detection channel respectively include a first protective glass, a first filter, a first imaging lens group and a first detector which are coaxially arranged along the optical axis.

7. The atmospheric synchronous correction system according to claim 6, characterized in that: The first polarization detection channel group, the second polarization detection channel group, the third polarization detection channel group and the fourth polarization detection channel group respectively include three adjacent polarization detection channels; The polarization detection channel comprises a second protective glass, a polarizer, a second filter, a second imaging lens group and a second detector which are coaxially arranged along the optical axis in sequence; Wherein, the included angle between any two polarizers in three adjacent polarization detection channels is 60°.

8. The atmospheric synchronous correction system according to claim 7, characterized in that: The first detector in the second intensity detection channel and the three second detectors in the fourth polarization detection channel group are refrigerated detectors; The system further comprises: a temperature control unit, electrically connected to the refrigeration detector, for detecting a current temperature of the refrigeration detector and adjusting the temperature of the refrigeration detector according to the current temperature; The heat sink is fitted with the refrigeration detector.

9. The atmospheric synchronous correction system according to claim 7, characterized in that: The amplified signal includes a first amplified signal and a second amplified signal, and the detector focal plane circuit includes: a first focal plane circuit, electrically connected to the first detector in the first intensity detection channel, the three second detectors in the first polarization detection channel group, the three second detectors in the second polarization detection channel group, and the three second detectors in the third polarization detection channel group, and configured to obtain the first amplified signal according to the first intensity electrical signal, the first polarization electrical signal, the second polarization electrical signal, and the third polarization electrical signal; The second focal plane circuit is electrically connected to the first detector in the second intensity detection channel and the three second detectors in the fourth polarization detection channel group, and is used to obtain the second amplified signal according to the second intensity electrical signal and the fourth polarization electrical signal.

10. The atmospheric synchronous correction system according to claim 1, characterized in that: The atmospheric parameter processor comprises: A main controller, connected to the aviation platform, for sending different control signals and transmitting the atmospheric correction parameters to the aviation platform; The calculator is electrically connected to the main controller and is used for processing the digital signal and the auxiliary data to obtain the atmospheric parameters according to different control signals, and for processing the atmospheric parameters and the auxiliary data to obtain the atmospheric correction parameters.

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