CN114894321A - Calibration method of infrared remote sensing instrument, electronic device and computer storage medium - Google Patents

Abstract

The present application provides a calibration method, an electronic device and a computer storage medium for an infrared remote sensing instrument for observing infrared light. The calibration method includes: obtaining the temperature of the black body on the star, the emissivity of the black body on the star in the observation band and the correction parameters; The black body radiation value of the black body; obtain the black body observation value obtained by observing the black body on the star with the infrared remote sensing instrument, and the cold sky observation value obtained by observing the cosmic space with the infrared remote sensing instrument; The energy value and the cold air observation value are input into the preset function for calculation, and the value of the calibration parameters included in the preset function is determined. The preset function is used to represent the radiation value of the energy of infrared light received by the infrared remote sensing instrument and the output of the infrared remote sensing instrument. Correspondence between values. The invention can improve the calibration accuracy of the infrared remote sensing instrument.

Description

Calibration method, electronic equipment and computer storage medium of infrared remote sensing instrument

technical field

The embodiments of the present application relate to the field of infrared remote sensing for measuring infrared light, and in particular, to a calibration method for an infrared remote sensing instrument for observing infrared light, an electronic device, and a computer storage medium.

Background technique

Infrared remote sensing is a remote sensing technology whose working band is limited to the infrared band. Based on the principle of infrared radiation, infrared remote sensing instruments are advanced equipment that receive infrared light from objects and measure infrared light. At present, they have been widely used in the fields of aviation and aerospace. In one application scenario, an infrared remote sensing instrument can be mounted on a satellite to observe the earth. The infrared remote sensing instrument receives the infrared light radiated by the object, and then outputs an output value for infrared observation. In the process of implementing the above technical solution, the output value of the infrared remote sensing instrument is determined according to the energy of the received infrared light. However, the corresponding relationship between the output value of different infrared remote sensing instruments and the energy of infrared light is unknown and cannot be the same. Therefore, it is necessary to calibrate the infrared remote sensing instrument, that is, to calibrate the output of the infrared remote sensing instrument, so that the infrared remote sensing instrument can be calibrated. The output value clearly corresponds to the amount of energy of the received infrared light. In the related art, a black body is used as a calibration source to calibrate an infrared remote sensing instrument. A black body is an idealized object without any reflection and transmission. However, in the actual calibration process, the black body on the satellite carried on the satellite is not an ideal object, but has a certain reflection ability. This calibration method reduces the accuracy of the calibration results of infrared remote sensing instruments.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present application provide a calibration method for an infrared remote sensing instrument, an electronic device, and a computer storage medium, so as to solve some or all of the above problems.

According to a first aspect of the embodiments of the present application, a calibration method for an infrared remote sensing instrument is provided, including: obtaining the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameters; The temperature, the emissivity of the black body on the star in the observation band, and the correction parameters calculate the black body radiation value of the black body on the star; Empty observation value; input the black body radiation value, black body observation value, infrared radiation energy in cosmic space, and cold air observation value into the preset function for calculation, and determine the values of the calibration parameters included in the preset function. The preset function is used for It represents the correspondence between the radiation value of the energy of infrared light received by the infrared remote sensing instrument and the output value of the infrared remote sensing instrument.

According to a second aspect of the embodiments of the present application, a calibration device for an infrared remote sensing instrument is provided, including: an acquisition module for acquiring the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameter; The radiation value module is used to calculate the black body radiation value of the black body on the star according to the temperature of the black body on the star, the emissivity of the black body on the star in the observation band and the correction parameters; the output value module is used to obtain the black body on the star observed by the infrared remote sensing instrument The obtained black body observations, and the cold air observations obtained by observing the cosmic space with infrared remote sensing instruments; the calibration module is used to input The preset function is calculated to determine the value of the calibration parameter included in the preset function, and the preset function is used for the corresponding relationship between the radiation value of the energy of the infrared light received by the infrared remote sensing instrument and the output value of the infrared remote sensing instrument.

According to a third aspect of the embodiments of the present application, an electronic device is provided, including: a processor, a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface communicate with each other through the bus; the memory is used to store at least one The executable instructions can cause the processor to perform operations corresponding to the calibration method for the infrared remote sensing instrument of the first aspect.

According to a fourth aspect of the embodiments of the present application, a computer storage medium is provided on which a computer program is stored, and when the program is executed by a processor, the method for calibrating an infrared remote sensing instrument according to the first aspect is implemented.

According to the calibration method, device, electronic device and computer storage medium of an infrared remote sensing instrument provided in the embodiment of the present application, the temperature of the black body on the satellite, the emissivity of the black body on the satellite in the observation band, and the correction parameters are obtained; The temperature, the emissivity of the black body on the star in the observation band, and the correction parameters calculate the black body radiation value of the black body on the star; Empty observation value; input the black body radiation value, black body observation value, infrared radiation energy value in cosmic space, and cold air observation value into the preset function for calculation, and determine the value of the calibration parameters included in the preset function. The preset function uses It represents the correspondence between the radiation value of the energy of infrared light received by the infrared remote sensing instrument and the output value of the infrared remote sensing instrument. Because in the calibration process, the black body radiation value of the black body on the star is corrected by the correction parameters, which can more accurately represent the energy of the infrared light received by the infrared remote sensing instrument to observe the black body on the star, and the calculated calibration parameters The value is more in line with the actual situation and improves the calibration accuracy of the infrared remote sensing instrument.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments described in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

Fig. 1 is the step flow chart of the calibration method of a kind of infrared remote sensing instrument provided for the embodiment of the application;

2 is a structural block diagram of a calibration device for an infrared remote sensing instrument provided by an embodiment of the application;

FIG. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application should fall within the protection scope of the embodiments of the present application.

The specific implementation of the embodiments of the present application is further described below with reference to the accompanying drawings of the embodiments of the present application.

The embodiment of the present application provides a calibration method for an infrared remote sensing instrument. The method can be applied to a calibration device of an infrared remote sensing instrument, that is, a device that executes a calibration method of an infrared remote sensing instrument. This application calibrates infrared remote sensing instruments based on the principle of infrared radiation. Infrared light (ie infrared) is a type of electromagnetic wave, and the generation of infrared light is closely related to temperature. -273.15℃), it will radiate infrared light outward. The amount of energy of the infrared light it radiates is determined by the surface temperature of the object. When observing with an infrared remote sensing instrument, the infrared remote sensing instrument receives the infrared light radiated by the object, and obtains the output value according to the energy of the infrared light. The greater the energy of the infrared light received by the infrared remote sensing instrument, the greater the output value. The smaller the energy of the received infrared light, the smaller the output value obtained.

Referring to FIG. 1 , a flowchart of steps of a calibration method for an infrared remote sensing instrument provided by an embodiment of the present application is shown. The calibration method of the infrared remote sensing instrument of the embodiment of the present application comprises the following steps:

Step 101: Obtain the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameter.

It should be noted that, in this application, a black body on a satellite refers to an object mounted on a satellite as a black body, which is an actual object, not a theoretical object. Usually, a black body refers to an idealized object that can absorb all external electromagnetic radiation without any reflection and transmission. A black body on a star is an object that can be used as a black body, but in fact the black body on a star is not without any Due to the influence of the actual processing and manufacturing process, the black body on the star will emit infrared light outward, and it will also reflect the infrared light projected by other objects to the black body on the star.

Optionally, the correction parameter may indicate a ratio of the energy of the infrared light in the environment where the blackbody on the star is reflected to the energy of the infrared light of the blackbody when the blackbody calibration is performed. It should be noted that the energy of the infrared light of the black body multiplied by the emissivity of the black body on the star in the observation band can represent the energy of the infrared light emitted by the black body on the star in the observation band, that is, the first radiation value. Here, a specific example is given to illustrate how to calculate the correction parameter.

Optionally, the method further includes: acquiring a calibration error value of the black body on the star, where the calibration error value represents the magnitude of the error introduced by the infrared radiation emitted by the environment where the black body on the star is located after being reflected by the black body on the star.

Calculate the correction parameter according to the obtained calibration error value of the black body on the star and a preset calculation formula, and the calculation formula is:

（公式一）

(Formula 1)

Among them, S represents the correction parameter, D represents the calibration error value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, and Plank() represents the Planck's function, e represents the emissivity of the black body on the star in the observation band.

According to the reflectivity and calibration error value of the black body on the star in the observation band, the correction parameter is calculated, and the sum of the reflectivity and the emissivity of the black body on the star in the observation band is 1. It should be noted that at the contact surface of the two media, the sum of the reflectivity, emissivity and transmittance of infrared light in the observation band is 1, because the transmittance of the black body on the star in the observation band is 0. Therefore, the star The sum of the emissivity and reflectivity of the upper black body in the observation band is 1.

It should also be noted that the calibration error value represents the difference between R _obs and R _ref , where R _obs refers to the radiation value obtained by observing a target with an infrared remote sensing instrument, that is, the observed "number" is passed through the calibration equation. The obtained physical radiation value, R _ref is the real radiation value of the target, and a R _obs and its corresponding R _ref form a calibration test sample pair. Multiple calibration and calibration sample pairs can be obtained by using the cross-calibration test method (that is, using a high-precision infrared remote sensing instrument and a low-precision infrared remote sensing instrument to observe the same target), and each calibration and calibration sample pair includes A R _obs and its corresponding R _ref . The calibration test sample pair can be used for the existing calibration accuracy test methods (such as reflectance method, irradiance method, radiance method) to obtain the calibration error value.

Step 102: Calculate the blackbody radiation value of the onboard blackbody according to the temperature of the onboard blackbody, the emissivity of the onboard blackbody in the observation band, and the correction parameter.

Optionally, in an embodiment, calculating the black body radiation value of the on-star black body according to the temperature of the on-star black body, the emissivity of the on-star black body in the observation band, and the correction parameter, including: according to the temperature of the on-star black body and the star The first radiation value is calculated from the emissivity of the upper black body in the observation band, and the first radiation value indicates the infrared light energy emitted by the black body on the star in the observation band; the second radiation value is calculated according to the temperature of the black body on the star and the correction parameters, The second radiation value indicates the infrared radiation energy of the environment where the black body on the star is reflected; the black body radiation value is obtained by summing the first radiation value and the second radiation value. Combined with the description of the black body on the star, because the black body on the star is not an idealized black body, the black body radiation value calculated based on the correction parameters of the black body on the star can more accurately represent the energy of the black body on the star emitting infrared light. And the infrared radiation energy of the environment where the black body on the star reflects. In this application, the first radiation value represents the infrared light energy emitted by the black body on the star in the observation band, and does not include the infrared radiation energy of the environment where the black body on the star is reflected. Exemplarily, the first radiation value may indicate the infrared light energy emitted by the black body on the star in the observation band estimated by the calculation, that is, indicating the star received when the black body on the star is observed by the infrared remote sensing instrument estimated by the calculation. The energy of infrared light emitted by the upper black body itself. The second radiation value represents the amount of energy that the black body on the star reflects from the infrared light projected by other objects. Exemplarily, the second radiation value may indicate the energy of the infrared light in the environment where the black body on the star is reflected by the calculation and estimated, that is, indicates the black body on the star received when the black body on the star is observed by the infrared remote sensing instrument estimated by the calculation. Reflects the energy of infrared light in its environment. It should be noted that the infrared light in the environment where the black body on the star is reflected by the second radiation value may include all sources of infrared light or part of the infrared light projected on the black body on the star and reflected by the black body on the star.

Optionally, in another embodiment, calculating the blackbody radiation value of the onboard blackbody according to the temperature of the onboard blackbody, the emissivity of the onboard blackbody in the observation band, and the correction parameter includes: according to a preset energy calculation formula. (Formula 2) To calculate the black body radiation value, the energy calculation formula is as follows,

（公式二）

(Formula 2)

Among them, _RH represents the black body radiation value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, Plank() represents the Planck function, and e represents the The emissivity of the black body on the above-mentioned star in the observation band, S represents the correction parameter.

Combined with the description in step 102, because the black body on the star is not an idealized black body, it will reflect the infrared light projected to the black body on the star, so the black body radiation value calculated by the correction parameters is more accurate.

It should be noted that the black body radiation value can represent the energy of infrared light radiated by the black body on the star, including the energy of the infrared light emitted by the black body on the star itself and the energy of the infrared light reflected by the black body on the star. The black body radiation value can be By calculating the estimated energy of the infrared light radiated from the black body on the star received by the infrared remote sensing instrument when observing the black body on the star.

Step 103: Obtain the black body observation value obtained by observing the black body on the star with an infrared remote sensing instrument, and the cold sky observation value obtained by observing the cosmic space with the infrared remote sensing instrument.

It should be noted that the black body observation value corresponds to the black body radiation value, which is the output value obtained or produced by observing the black body on the star with infrared remote sensing instruments, that is, the infrared light radiated by the black body on the star (including the infrared light emitted by the black body on the star itself). and the reflected infrared light from the environment where the infrared remote sensing instrument is located). The cold air observation value corresponds to the cold air radiation value, and the reference object can be the cold air, that is, the cosmic space, because the cosmic space itself cannot radiate infrared light, therefore, the cold air radiation value is 0, which greatly reduces the computational complexity and Computation.

It should also be noted that, if the calibration device of the infrared remote sensing instrument includes an infrared remote sensing instrument, the black body observation value is obtained by observing the black body on the star with the infrared remote sensing instrument, and the cold sky observation value is obtained by observing the cosmic space with the infrared remote sensing instrument; The calibration device does not include infrared remote sensing instruments, and is a device independent of infrared remote sensing instruments. It obtains black body observations obtained by using infrared remote sensing instruments to observe black bodies on stars, and cold air observations obtained by using infrared remote sensing instruments to observe cosmic space. Including: receiving black body observations and cold sky observations sent by infrared remote sensing instruments, black body observations can be obtained directly by using infrared remote sensing instruments to observe black bodies on stars, and cold sky observations can be obtained by using infrared remote sensing instruments to observe the universe.

Step 104 , input the black body radiation value, black body observation value, infrared radiation energy value in cosmic space, and cold space observation value into a preset function for calculation, and determine the value of the calibration parameter included in the preset function.

The preset function is used to represent the corresponding relationship between the radiation value of the energy of the infrared light received by the infrared remote sensing instrument and the output value DN of the infrared remote sensing instrument. The number of scaling parameters may be at least one, and through the calculation in step 104, the value of each scaling parameter may be determined.

It should be noted that the preset function can be expressed as R=f(DN), where R represents the radiation value, and DN represents the output value of the infrared remote sensing instrument. Optionally, in an embodiment, the preset function may be a linear function, and the preset function may be expressed as R=k´DN+b, where k is a slope parameter, b is an offset parameter, k and b are all calibration parameters. Here, two specific examples are given to illustrate the way of calculating the slope parameter and the offset parameter, respectively.

Optionally, in the first example, how to calculate the slope parameter k, input the preset function to calculate the black body radiation value, the black body observation value, the infrared radiation energy value of the cosmic space, and the cold space observation value, and determine the preset value. The values of the scaling parameters included in the function, including:

According to the preset function, the difference between the black body radiation value and the cold air radiation value is calculated as the first difference value, the black body observation value and the cold air observation value are calculated as the second difference value, and the ratio between the first difference value and the second difference value is calculated, As the value of the slope parameter; among them, the cold air radiation value is 0, and the calibration parameter includes the slope parameter.

Specifically, it can be calculated by formula 3:

（公式三）

(Formula 3)

Among them, _RH represents the black body radiation value, _RL represents the cold air radiation value, _DH represents the black body observation value, _{DL represents the cold air observation value, and RL is} 0.

Optionally, in the second example, it is explained how to calculate the offset parameter b, input the preset function to calculate, determine The values of the scaling parameters included in the preset function, including:

Calculate the inverse of the product of the slope parameter and the cold air observation value as the value of the offset parameter. The scaling parameter includes the offset parameter.

It can be calculated by formula four:

（公式四）

(Formula 4)

where b is the offset parameter, k is the slope parameter, and _DL is the cold air observation.

The calibration method of the infrared remote sensing instrument provided by the embodiment of the present application can also use the following calibration formula to calculate the entrance pupil radiation amount corresponding to the output value of an observation target observed together with infrared remote sensing (the entrance pupil radiation amount is the amount received by the infrared remote sensing instrument the radiance value of the energy of the infrared light received). The calibration formula is as follows:

R _obs =k*DN+b (Formula 5)

In the calibration formula 5, DN represents the output value of the infrared remote sensing instrument when observing an observation target, k represents the slope parameter, b represents the offset parameter, and R _obs represents the entrance pupil radiation corresponding to the above output value.

In the calibration method of the infrared remote sensing instrument provided by the embodiment of the present application, in the calibration process, not only the first radiation value of the infrared light emitted by the black body on the star itself, but also the reflection environment of the black body on the star is considered. The second radiation value of the infrared light, the sum of the first radiation value and the second radiation value can more accurately represent the energy of the infrared light received by the infrared remote sensing instrument to observe the black body on the star, and the calculated calibration parameters The value is more in line with the actual situation and improves the calibration accuracy of the infrared remote sensing instrument.

Based on the method for calibrating an infrared remote sensing instrument described in the embodiment corresponding to FIG. 1 , an embodiment of the present application provides a calibration device for an infrared remote sensing instrument, which is used to execute the method for calibrating an infrared remote sensing instrument provided by the embodiment of the present application. . Referring to FIG. 2 , a structural block diagram of a calibration device for an infrared remote sensing instrument provided by an embodiment of the present application is shown. The calibration device 20 of the infrared remote sensing instrument includes:

an acquisition module 201, configured to acquire the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameter;

The radiation value module 202 is used to calculate the black body radiation value of the black body on the star according to the temperature of the black body on the star, the emissivity of the black body on the star in the observation band and the correction parameter;

The output value module 203 is used to obtain the black body observation value obtained by observing the black body on the star with the infrared remote sensing instrument, and the cold sky observation value obtained by observing the cosmic space with the infrared remote sensing instrument;

The calibration module 204 is configured to input the blackbody radiation value, the blackbody observation value, the infrared radiation energy value of the cosmic space, and the cold space observation value into a preset function for calculation, and determine the value of the calibration parameter included in the preset function. The function is used to represent the correspondence between the radiation value of the infrared light energy received by the infrared remote sensing instrument and the output value of the infrared remote sensing instrument.

Optionally, in an example, the radiation value module 202 is configured to calculate a first radiation value according to the temperature of the black body on the star and the emissivity of the black body on the star in the observation band, and the first radiation value indicates that the black body on the star is outward. The energy of emitting infrared light; calculate the second radiation value according to the temperature of the black body on the star and the correction parameter, the second radiation value indicates the energy of the infrared light in the environment where the black body on the star reflects; calculate the first radiation value and the second radiation value and get the black body radiation value.

Optionally, in an example, the radiation value module 202 is configured to calculate the black body radiation value according to a preset energy calculation formula, and the energy calculation formula is as follows:

；

;

Among them, _RH represents the black body radiation value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, Plank() represents the Planck function, and e represents the The emissivity of the black body on the star in the observation band, S represents the correction parameter.

Optionally, in an example, the calibration device 20 of the infrared remote sensing instrument further includes a correction module 205 for acquiring the calibration error value of the black body on the star; Correction parameters, the sum of the reflectivity and emissivity of the black body on the star in the observation band is 1.

Optionally, in an example, the correction module 205 is configured to calculate the correction parameter according to a preset parameter calculation formula, and the parameter calculation formula is as follows:

；

;

Among them, S represents the correction parameter, D represents the calibration error value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, and Plank() represents the Planck's function, e represents the emissivity of the black body on the star in the observation band.

Optionally, in an example, the correction module 205 is configured to acquire the calibration error value caused by the infrared light emitted by the environment where the black body on the star is located.

Optionally, in an example, the calibration module 204 is configured to calculate the difference between the black body radiation value and the cold air radiation value as the first difference according to the preset function, and calculate the black body observation value and the cold air observation value as the first difference. Two difference values, calculate the ratio of the first difference value and the second difference value, as the value of the slope parameter; wherein, the cold air radiation value is 0, and the calibration parameter includes the slope parameter.

Optionally, in an example, the calibration module 204 is configured to calculate the inverse of the product of the slope parameter and the cold air observation value as a value of the offset parameter, and the calibration parameter includes the offset parameter.

The calibration device of the infrared remote sensing instrument provided by the embodiment of the present application, because in the calibration process, the black body radiation value of the black body on the star is corrected by the correction parameter, which can more accurately represent the infrared remote sensing instrument that observes the black body on the star. The energy of infrared light, the value of the calibration parameter calculated by this is more in line with the actual situation, and the accuracy of the calibration of the infrared remote sensing instrument is improved.

Based on the embodiments corresponding to FIG. 1 and FIG. 2, the embodiment of the present application provides an electronic device for executing the calibration method of the infrared remote sensing instrument described in the embodiment corresponding to FIG. 1. Referring to FIG. 3, FIG. 3. A schematic structural diagram of an electronic device provided in the embodiments of the present application. The specific embodiments of the present application do not limit the specific implementation of the electronic device. Exemplarily, the electronic device may be a device including an infrared remote sensing instrument, or an independent device. equipment for infrared remote sensing instruments.

As shown in FIG. 3 , the electronic device may include: a processor (processor) 302 , a communications interface (Communications Interface) 304 , a memory (memory) 306 , and a bus 308 . The processor 302 , the communication interface 304 , and the memory 306 communicate with each other through the bus 308 . The communication interface 304 is used to communicate with other electronic devices such as terminal devices or servers. The processor 302 is configured to execute the program 310, and specifically may execute the relevant steps in the above-mentioned embodiments of the calibration method for an infrared remote sensing instrument. Specifically, the program 310 may include program code including computer operation instructions.

The processor 302 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the electronic device may be the same type of processors, such as one or more CPUs; or may be different types of processors, such as one or more CPUs and one or more ASICs.

The memory 306 is used to store the program 310 . The memory 306 may include high-speed RAM memory, and may also include non-volatile memory, including at least one disk memory.

The program 310 may specifically be used to cause the processor 302 to execute any calibration method for an infrared remote sensing instrument in the foregoing first embodiment.

For the specific implementation of the steps in the program 310, reference may be made to the corresponding descriptions in the corresponding steps and units in the above-mentioned embodiments of the calibration method for an infrared remote sensing instrument, which will not be repeated here. Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described devices and modules, reference may be made to the corresponding process descriptions in the foregoing method embodiments, which will not be repeated here.

The electronic device provided by the embodiment of the present application can more accurately represent the energy of the infrared light received by the infrared remote sensing instrument to observe the black body on the star because the correction parameter is used to correct the black body radiation value of the black body on the star during the calibration process. The value of the calibration parameters calculated by this is more in line with the actual situation, and the accuracy of the calibration of the infrared remote sensing instrument is improved.

It should be pointed out that, according to the needs of implementation, each component/step described in the embodiments of the present application may be split into more components/steps, or two or more components/steps or part of operations of components/steps may be combined into New components/steps to achieve the purpose of the embodiments of the present application.

The above-described methods according to the embodiments of the present application may be implemented in hardware, firmware, or as software or computer codes that may be stored in a recording medium (such as CD ROM, RAM, floppy disk, hard disk, or magneto-optical disk), or implemented by Network downloaded computer code originally stored in a remote recording medium or non-transitory machine-readable medium and will be stored in a local recording medium so that the methods described herein can be stored on a computer using a general purpose computer, special purpose processor or programmable or such software processing on a recording medium of dedicated hardware such as ASIC or FPGA. It will be understood that a computer, processor, microprocessor controller or programmable hardware includes storage components (eg, RAM, ROM, flash memory, etc.) that can store or receive software or computer code, when the software or computer code is executed by a computer, When accessed and executed by a processor or hardware, the method of calibration of an infrared remote sensing instrument described herein is implemented. Furthermore, when a general-purpose computer accesses code for implementing the calibration method for an infrared remote sensing instrument shown herein, execution of the code converts the general-purpose computer into a special-purpose computer for implementing the calibration method for an infrared remote sensing instrument shown herein. computer.

Those of ordinary skill in the art can realize that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Experts may use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present application.

The above embodiments are only used to illustrate the embodiments of the present application, but are not intended to limit the embodiments of the present application. Those of ordinary skill in the relevant technical field can also make various Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application, and the patent protection scope of the embodiments of the present application should be defined by the claims.

Claims (9)

1. a calibration method of infrared remote sensing instrument, is characterized in that, comprises: Obtain the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameters; Calculate the black body radiation value of the black body on the star according to the temperature of the black body on the star, the emissivity of the black body on the star in the observation band and the correction parameter; Obtain black body observations obtained by using the infrared remote sensing instrument to observe the black body on the star, and cold sky observations obtained by using the infrared remote sensing instrument to observe the cosmic space; Input the black body radiation value, the black body observation value, the infrared radiation energy value of the cosmic space, and the cold space observation value into a preset function for calculation, and determine the value of the calibration parameter included in the preset function. The preset function is used to represent the corresponding relationship between the energy value of the infrared radiation received by the infrared remote sensing instrument and the output value of the infrared remote sensing instrument. 2 . The method according to claim 1 , wherein calculating the temperature of the black body on the star, the emissivity of the black body on the star in the observation band and the correction parameter, the temperature of the black body on the star is calculated. 3 . Blackbody radiation values, including: A first radiation value is calculated according to the temperature of the black body on the star and the emissivity of the black body on the star in the observation band, and the first radiation value indicates the infrared light energy emitted by the black body on the star in the observation band ; A second radiation value is calculated according to the temperature of the black body on the star and the correction parameter, the second radiation value indicates the infrared radiation energy of the environment where the black body on the star is reflected; the first radiation value and the The second radiation values are summed to obtain the black body radiation value. 3 . The method according to claim 1 , wherein the black body radiation of the black body on the star is calculated according to the temperature of the black body on the star, the emissivity of the black body on the star in the observation band, and the correction parameter. 4 . values, including: The blackbody radiation value is calculated according to a preset energy calculation formula, and the energy calculation formula is as follows:

; Among them, _RH represents the black body radiation value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, Plank() represents the Planck function, and e represents the The emissivity of the black body on the star in the observation band, S represents the correction parameter. 4. The method according to claim 1, wherein the method further comprises: Obtaining the calibration error value of the black body on the star, the calibration error value representing the size of the error introduced by the infrared radiation emitted by the environment where the black body on the star is located after being reflected by the black body on the star; Calculate the correction parameter according to the obtained calibration error value of the black body on the star and a preset calculation formula, and the calculation formula is as follows:

; Among them, S represents the correction parameter, D represents the calibration error value, i represents the wavelength, W(i) represents the spectral response function of the infrared remote sensing instrument, _TH represents the temperature of the black body on the star, and Plank() represents the Planck's function, e represents the emissivity of the black body on the star in the observation band. 5 . The method according to claim 1 , wherein the black body radiation value, the black body observation value, the infrared radiation energy value of the cosmic space, and the cold space observation value are input into a preset value. 6 . The function is calculated to determine the value of the calibration parameter included in the preset function, including: According to the preset function, the difference between the black body radiation value and the cold air radiation value is calculated as a first difference value, the black body observation value and the cold air observation value are calculated as a second difference value, and the first difference value is calculated. the ratio of the difference to the second difference, as the value of the slope parameter; Wherein, the cold air radiation value is 0, and the calibration parameter includes the slope parameter. 6 . The method according to claim 5 , wherein the black body radiation value, the black body observation value, the infrared radiation energy value of the cosmic space and the cold space observation value are input into a preset value. 7 . The function is calculated to determine the value of the calibration parameter included in the preset function, including: The inverse number of the product of the slope parameter and the cold air observation value is calculated as the value of the offset parameter, and the scaling parameter includes the offset parameter. 7. The method according to claim 6, wherein the method further comprises: Observing the output value generated by an observation target according to the infrared remote sensing instrument, and using a predetermined calibration formula to calculate the entrance pupil radiation amount corresponding to the output value of the observation target, the calibration formula is as follows, R _obs =k*DN+b; Wherein, DN represents the output value when the infrared remote sensing instrument observes an observation target, k represents the slope parameter, b represents the offset parameter, and R _obs represents the output value when the infrared remote sensing instrument observes an observation target The value corresponds to the amount of radiation at the entrance pupil. 8. An electronic device comprising: a processor, a memory, a communication interface and a bus, the processor, the memory and the communication interface communicate with each other through the bus; The memory is used for storing at least one executable instruction, and the executable instruction causes the processor to perform an operation corresponding to the calibration method for an infrared remote sensing instrument according to any one of claims 1-7. 9. A computer storage medium on which a computer program is stored, and when the program is executed by a processor, the calibration method for an infrared remote sensing instrument according to any one of claims 1-7 is implemented.

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