Method, device, equipment, storage medium and program product for evaluating uncertainty of full link of inter-star radiation reference quantity transmission of reference star

Abstract

The invention provides a reference star inter-star radiation reference value transmission full-link uncertainty evaluation method, device and equipment, a storage medium and a program product, and belongs to the technical field of space radiation measurement, and the method comprises the steps: calculating the transmission repeatability of the spectral radiation brightness of a target star instrument through employing an A-class evaluation method; calculating the uncertainty of the spectral radiance influenced by the time domain, the space domain, the spectral domain and the angular domain by using a B-class evaluation method; determining the uncertainty caused by the transmission process based on the transmission repeatability and the spectral radiation brightness uncertainty influenced by the time domain, the space domain, the spectral domain and the angular domain; and determining the transmission uncertainty of the reference quantity value of the target satellite instrument based on the uncertainty caused by the transmission process, the uncertainty of the spectral radiance reference value of the reference satellite instrument, the uncertainty of the spectral radiance measurement value of the target satellite instrument and the influence of other factors. The invention provides a GUM-based general inter-satellite radiation reference quantity value transmission full-link uncertainty accurate evaluation scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of space radiation measurement, and in particular to a method and device for evaluating the full-link uncertainty of inter-satellite radiation reference value transfer of a reference satellite, a storage medium, and a program product. BACKGROUND

[0002] Optical spectral remote sensing instruments in earth observation satellites usually have drift and deviation relative to pre-launch calibration due to launch and long-term operation in space environment, which seriously limits the reliability and accuracy of satellite-derived information. During the on-orbit service life of the satellite, with the performance degradation of instrument components, a reliable method is needed to monitor and correct such changes to ensure the correctness of earth observation data records. The space radiation measurement reference satellite (reference satellite) relocates the national laboratory's radiation reference and quantity transfer technology to space, realizing the on-orbit calibration of the reference satellite instrument traceable to SI (International System of Units) units. Using simultaneous, co-located, and co-angled observation, inter-satellite radiation transfer from the reference satellite to the target satellite is achieved, which can ensure the consistency of the observation radiation reference of different remote sensing satellites, making it possible to jointly apply long time series of satellite remote sensing data, and thus recommended by the Calibration and Validation Working Group of the International Earth Observation System Committee. Inter-satellite radiation value transfer using the reference satellite can realize radiation comparison and correction of other on-orbit satellites based on a unified radiation reference. Taking the spectral radiance data of the reference satellite instrument carried by the reference satellite as a reference, selecting matching data of the reference satellite instrument and the target satellite instrument in time, space, and angle, and after spectral matching processing, the spectral radiance error, correction amount, or calibration coefficient of the target satellite instrument can be obtained, thereby completing the evaluation or alternative calibration of the observation deviation characteristics of the target satellite instrument. Precise prediction of climate change in the next few decades requires a significant improvement in the accuracy and confidence level of earth observation data, ensuring that satellite observation data is reasonable, repeatable, and traceable, and also providing traceable international SI unit and quantitative uncertainty information. The European Research and Development Center project proposes the FIDUCEO (Fidelity and Uncertainty in Climate data records from Earth Observations) plan for the accuracy and uncertainty of earth observation climate data records, introduces metrology concepts into the field of space observation of earth climate, and uses traceable uncertainty transfer chain and stability evaluation verification to ensure the accuracy and reliability of meteorological observation data. How to evaluate the uncertainty of the transfer result obtained by the radiation reference transfer is a common problem encountered by meteorological, oceanographic, and terrestrial remote sensing satellites when using radiation reference value transfer.

[0003] At present, the uncertainty analysis in the field of remote sensing is mainly based on the traditional error theory, which divides the error into systematic error and random error, but this way is easy to ignore the factors which are neither typical systematic error nor typical random error, such as the fluctuation of measurement conditions caused by environmental changes, resulting in inaccurate uncertainty evaluation results.

[0004] Therefore, there is an urgent need for a method for accurately evaluating the full-link uncertainty of the reference star to the radiation value transfer of the series target star. SUMMARY

[0005] The present application provides a reference star interstellar radiation reference value transfer full-link uncertainty evaluation method, device, equipment, storage medium and program product, to solve the defects of inaccurate evaluation of traditional uncertainty analysis method in the prior art.

[0006] The present application provides a reference star interstellar radiation reference value transfer full-link uncertainty evaluation method, which comprises the following steps: The A-type evaluation method in the Guide to the Expression of Uncertainty in Measurement (GUM) is used to calculate the transfer repeatability of the spectral radiance of the target star instrument; The B-type evaluation method in the GUM is used to calculate the spectral radiance uncertainty influenced by the time domain, the space domain, the spectral domain and the angle domain; Based on the transfer repeatability and the spectral radiance uncertainty influenced by the time domain, the spectral radiance uncertainty influenced by the space domain, the spectral radiance uncertainty influenced by the spectral domain and the spectral radiance uncertainty influenced by the angle domain, the uncertainty caused by the transfer process is determined; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused by the transfer process from the reference star instrument to the target star instrument; Based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors, the reference value transfer uncertainty of the target star instrument is determined; the reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained when the reference star instrument transfers to the target star instrument.

[0007] According to the reference star interstellar radiation reference value transfer full-link uncertainty evaluation method provided by the present application, the A-type evaluation method in the Guide to the Expression of Uncertainty in Measurement (GUM) is used to calculate the transfer repeatability of the spectral radiance of the target star instrument, which comprises: Based on the maximum matching threshold of the time domain, the space domain, the spectral domain and the angle domain respectively, a plurality of groups of matching samples are screened; each group of matching samples comprises a spectral radiance measurement value of a target star instrument and its corresponding spectral radiance reference value of a reference star instrument; for each of the matching samples, calculating a relative deviation of the spectral radiance measurement of the target star instrument from the spectral radiance reference of the reference star instrument; based on the relative deviations of the matching samples, calculating an average relative deviation of all the matching samples using an arithmetic average method; based on the average relative deviation and the relative deviations of the matching samples, calculating a sample standard deviation; based on the sample standard deviation, determining the transfer repeatability of the spectral radiance of the target star instrument.

[0008] According to the present application, a full-link uncertainty evaluation method for interstellar radiation reference value transfer of a reference star is provided, wherein the spectral radiance uncertainty influenced by time domain, space domain, spectral domain and angle domain is calculated using a B-type evaluation method in the GUM, and the method comprises the following steps: determining the sensitivity coefficients of the influences of time domain, space domain, spectral domain and angle domain; determining the standard uncertainties of the time domain, space domain, spectral domain and angle domain; determining the spectral radiance uncertainty influenced by the time domain based on the product of the sensitivity coefficient of the time domain and the standard uncertainty of the time domain; determining the spectral radiance uncertainty influenced by the space domain based on the product of the sensitivity coefficient of the space domain and the standard uncertainty of the space domain; determining the spectral radiance uncertainty influenced by the spectral domain based on the product of the sensitivity coefficient of the spectral domain and the standard uncertainty of the spectral domain; determining the spectral radiance uncertainty influenced by the angle domain based on the product of the sensitivity coefficient of the angle domain and the standard uncertainty of the angle domain.

[0009] According to the present application, a full-link uncertainty evaluation method for interstellar radiation reference value transfer of a reference star is provided, wherein the sensitivity coefficients of the influences of time domain, space domain, spectral domain and angle domain are determined, and the method comprises the following steps: determining the sensitivity coefficients of the influences of spectral domain and angle domain using a first method; determining the sensitivity coefficients of the influences of time domain and space domain using a second method; The first method is as follows: fixing other influencing factors to remain unchanged, and determining the sensitivity coefficient of a target influencing factor based on the ratio between the relative variation of the spectral radiance of the output target star instrument and the input variation of the target influencing factor; The second method is as follows: determining the sensitivity coefficient of a target influencing factor based on the ratio between the relative variation of the spectral radiance of the output target star instrument and the input variation of the target influencing factor under different transfer application conditions.

[0010] The application provides a method for evaluating the full-link uncertainty of a reference star interstellar radiation reference value transmission, which determines the standard uncertainty of time domain, space domain, spectral domain and angle domain influences, and comprises the following steps of: determining the standard uncertainty of the time domain influence based on the ratio of the expanded uncertainty of the time domain influence to a coverage factor; determining the standard uncertainty of the space domain influence based on the ratio of the expanded uncertainty of the space domain influence to a coverage factor; determining the standard uncertainty of the spectral domain influence based on the ratio of the expanded uncertainty of the spectral domain influence to a coverage factor; determining the standard uncertainty of the angle domain influence based on the ratio of the expanded uncertainty of the angle domain influence to a coverage factor.

[0011] The application provides a method for evaluating the full-link uncertainty of a reference star interstellar radiation reference value transmission, wherein the other influence factor is an uncertainty component of spectral radiance caused by other factors, and the other factors include at least one of the following: an imperfect factor of a spectral domain correction method, an imperfect factor of an angle domain correction method, a measurement model imperfect factor, a system nonlinearity factor and a system responsivity drift factor.

[0012] The application further provides a device for evaluating the full-link uncertainty of a reference star interstellar radiation reference value transmission, which comprises the following modules: a type A evaluation module, which is used for calculating the transmission repeatability of spectral radiance of a target star instrument by using a type A evaluation method in a measurement uncertainty representation guide GUM; a type B evaluation module, which is used for calculating the uncertainty of spectral radiance caused by time domain, space domain, spectral domain and angle domain influences by using a type B evaluation method in the GUM; a transmission calculation module, which is used for determining the uncertainty caused by a transmission process based on the transmission repeatability and the uncertainty of spectral radiance caused by the time domain influence, the uncertainty of spectral radiance caused by the space domain influence, the uncertainty of spectral radiance caused by the spectral domain influence and the uncertainty of spectral radiance caused by the angle domain influence; the uncertainty caused by the transmission process is the uncertainty of spectral radiance caused by the transmission process from a reference star instrument to the target star instrument; The uncertainty calculation module is configured to determine a reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, an uncertainty of a spectral radiance reference value of the reference star instrument, an uncertainty of a spectral radiance measurement value of the target star instrument, and other influencing factors, wherein the reference value transfer uncertainty is an uncertainty of a relative error of the spectral radiance of the target star instrument when the interstellar reference value of the reference star instrument is transferred to the target star instrument.

[0013] The present application also provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for evaluating the full-link uncertainty of the interstellar radiation reference value transfer of the reference star when executing the computer program.

[0014] The present application also provides a non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program is executable by a processor to implement the method for evaluating the full-link uncertainty of the interstellar radiation reference value transfer of the reference star.

[0015] The present application also provides a computer program product comprising a computer program, wherein the computer program is executable by a processor to implement the method for evaluating the full-link uncertainty of the interstellar radiation reference value transfer of the reference star.

[0016] The application provides a reference star interstellar radiation reference value transmission full-link uncertainty evaluation method, device, equipment, storage medium and program product. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the application or prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0018] Figure 1 is a flowchart of the reference star interstellar radiation reference value transmission full-link uncertainty evaluation method provided by the application; Figure 2 is a structural schematic diagram of a reference star interstellar radiation reference value transmission full-link uncertainty evaluation device provided by the application; Figure 3 is a structural schematic diagram of an electronic device. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only a 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 those skilled in the art without creative work fall within the protection scope of the present application.

[0020] It should be noted that, in the description of the embodiments of the present application, the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or device comprising the element. The terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" means at least one of the connected objects, and the character " / ", generally means that the objects before and after are in a "or" relationship.

[0022] The following will be described in conjunction with Figures 1-3 The reference star interstellar radiation reference value transfer full link uncertainty evaluation method, device, equipment, storage medium and program product provided by the embodiments of the present application are described.

[0023] Figure 1 The flowchart of the reference star interstellar radiation reference value transfer full link uncertainty evaluation method provided by the present application is shown in FIG. 1, which comprises the following steps: Figure 1 S110, calculating the transfer repeatability of the spectral radiance of the target star instrument using the type A evaluation method in the measurement uncertainty expression guide GUM; S120, calculating the spectral radiance uncertainty influenced by time domain, space domain, spectral domain and angle domain using the type B evaluation method in the GUM; S130, determining the uncertainty caused by the transfer process based on the transfer repeatability and the spectral radiance uncertainty influenced by the time domain, the spectral radiance uncertainty influenced by the space domain, the spectral radiance uncertainty influenced by the spectral domain and the spectral radiance uncertainty influenced by the angle domain; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused in the process of transferring from the reference star instrument to the target star instrument; S140, determining the reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors; the reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained in the process of transferring the interstellar radiation value from the reference star instrument to the target star instrument.

[0024] ​It should be noted that the execution subject of the reference star interstellar radiation reference value transmission full-link uncertainty evaluation method provided by the embodiments of the present application can be a server, a computer device, for example, a desktop computer, a tablet computer, a notebook computer, a palm computer, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), and the like.

[0025] The full-link uncertainty sources of the reference value transmitted from the reference star instrument to the target star instrument mainly include: the uncertainty of the reference value of the reference star instrument, the uncertainty caused by the influence of the time domain, the space domain, the spectral domain, and the angle domain during the transmission process, the uncertainty of the measurement value of the target star instrument, and the uncertainty caused by the imperfect spectral angle correction method, the imperfect model, the system nonlinearity, and the system response drift. Among them, the influence of the time domain, the space domain, the spectral domain, and the angle domain during the transmission process is respectively: (1) Temporal domain influence: the TOA spectral radiance (spectral reflectance) uncertainty caused by the observation time difference between the target star instrument and the reference star instrument and the change of the observation target (including the atmosphere) during the period.

[0026] (2) Spatial domain influence: the TOA spectral radiance (spectral reflectance) uncertainty caused by the spatial coverage difference between the target star instrument and the reference star instrument and the spatial uniformity of the observation target.

[0027] (3) Spectral domain influence: the TOA spectral radiance (spectral reflectance) uncertainty caused by the spectral response function difference between the target star instrument and the reference star instrument, the wavelength error, and the spectral characteristics of the observation target.

[0028] (4) Geometry domain influence: the TOA spectral radiance (spectral reflectance) uncertainty caused by the observation geometry difference between the target star instrument and the reference star instrument and the radiation direction characteristics of the observation target.

[0029] In the actual radiation reference transmission process, through target selection, time and space constraints, angle constraint correction, and spectral constraint correction, the uncertainty caused by these factors can be reduced. For example: by selecting a target with stable time characteristics, the uncertainty of the time domain influence can be reduced; by selecting a large-area uniform target and combining with geometry correction, the uncertainty of the space domain influence can be reduced; according to the spectral response function, the observed radiation is corrected by spectral matching, the uncertainty of the spectral domain influence can be reduced; by selecting a target with good Lambert characteristics, observing at the same angle, or correcting the angle by a direction model, the uncertainty of the angle domain influence can be reduced.

[0030] The radiative transfer of meteorological, oceanic and high-resolution terrestrial series satellites has the following characteristics respectively: The observation characteristics of meteorological series satellites: low spatial resolution, wide swath, global observation (one-day revisit), wide spectral coverage and narrow bandwidth (with channel type and hyperspectral instruments), large observation dynamic, wide coverage of satellite observation angle; The observation characteristics of high-resolution terrestrial series satellites: high spatial resolution, narrow swath, long revisit period, narrow spectral coverage and wide bandwidth, medium observation dynamic, narrow coverage of satellite observation angle; The observation characteristics of oceanic series satellites: low spatial resolution, wide swath, global observation, wide spectral coverage and narrow bandwidth (with channel type and hyperspectral instruments), small observation dynamic, wide coverage of satellite observation angle.

[0031] According to the general method of radiometric intercalibration and uncertainty evaluation, taking into account the radiative transfer characteristics of the three fields, a measurement model of the relative error of the spectral radiance of the target instrument at the top of the atmosphere is established: (1); Wherein, is the relative error of the spectral radiance of the target instrument obtained when the reference star instrument is transferred to the target star instrument; is the measured value of the spectral radiance of the target instrument, W·cm -2 ·sr -1 nm -1 ; is the reference value of the spectral radiance of the reference star instrument, W·cm -2 ·sr -1 nm -1 ; is the influence quantity which contributes to the uncertainty of the final result but is not reflected in the formula, for example: imperfect spectral angle correction method, instrument system nonlinearity and system response drift during value transfer, changes in environmental factors, imperfect use of models during transfer process, and some constraint condition assumptions when analyzing spatial and temporal domains, etc.

[0032] In an optional embodiment, the reference transfer uncertainty of the target star instrument further includes the spectral radiance uncertainty component caused by other factors, the other factors including at least one of the following: imperfect spectral domain correction method factor, imperfect angular domain correction method factor, measurement model imperfect factor, system nonlinearity factor and system response drift factor.

[0033] Here, the uncertainty of the relative error of the spectral radiance ​​It mainly includes: the uncertainty of the reference value of the reference star instrument, the uncertainty caused by the influence of the time and space spectrum angle (incomplete matching, etc.) during the transfer process, the uncertainty of the target star instrument measurement value, and the uncertainty components caused by factors such as the imperfect spectrum angle correction method. That is, the reference transfer uncertainty is shown as follows: , (2); in, is the uncertainty of the reference value of the TOA spectrum radiance of the benchmark star instrument, %; is the transfer uncertainty, that is, the uncertainty of the spectral radiation brightness of the target star instrument caused by the inter-satellite value transfer from the reference star instrument to the target star instrument, %; is the uncertainty of the target star instrument spectral radiance measurement value, %; It is the uncertainty component of spectral radiance caused by other factors, such as imperfect spectral angle correction method, imperfect model, system nonlinearity, system response drift, etc., %.

[0034] Here, the uncertainty of the reference star instrument measurement value is and the uncertainty of the target star instrument measurement value It is determined by the performance of the reference and target instruments at both ends of the transmission chain. Sources of uncertainty include: instrument traceability uncertainty, wavelength accuracy, nonlinearity, stray radiation, stability, SSE effects, and polarization effects.

[0035] Uncertainty in spectral radiance caused by intersatellite radiation benchmark transfer process It mainly includes the divergence of multiple transmission results under the conditions of spatiotemporal spectral angle matching. , as well as the uncertainty caused by incomplete matching of time domain, space domain, spectrum domain and angular domain 、 、 、 : , (3); in, It is the uncertainty of the estimated spectral radiance of the target star instrument generated during the inter-satellite value transfer from the reference star instrument to the target instrument, %; It is the measurement repeatability (experimental standard deviation) of the relative error of the target star instrument's spectral radiance obtained by multiple value transfers from the reference star instrument to the target star instrument within the set time, space, spectrum and angle threshold ranges, %; 、 、 、 The uncertainty of the TOA spectral radiance estimation value of the target star instrument is caused by the time domain difference (observation time difference, change of the observation target (including atmosphere) during observation), the spatial domain difference (observation target spatial coverage), the spectral domain difference (spectral response function difference, wavelength error, spectral characteristics of the observation target), and the angle domain difference (observation geometry difference, radiation direction characteristics of the observation target) of the target star instrument and the reference star instrument.

[0036] It can be understood that adding the uncertainty components of the spectral radiance caused by other factors further improves the uncertainty sources, comprehensively describes the uncertainty, and further improves the accuracy of the uncertainty evaluation.

[0037] In S110, GUM (Guide to the Expression of Uncertainty in Measurement) is a method for evaluating and expressing the uncertainty of measurement results. Among them, the A-type evaluation refers to the divergence of multiple repeated transmission results, that is, the consistency and stability of the TOA (Top of Atmosphere) spectral radiance measurement results obtained by the target star instrument through the reference star instrument. The A-type evaluation method is to evaluate the uncertainty by statistically analyzing the observation column.

[0038] In an optional embodiment, the A-type evaluation method in the Guide to the Expression of Uncertainty in Measurement (GUM) is used to calculate the transmission repeatability of the spectral radiance of the target star instrument, comprising: Based on the maximum matching threshold of the time domain, the spatial domain, the spectral domain and the angle domain, respectively, a plurality of groups of matching samples are screened; each group of matching samples includes a spectral radiance measurement value of the target star instrument and a corresponding reference value of the spectral radiance of the reference star instrument; For each group of matching samples, the relative deviation of the spectral radiance measurement value of the target star instrument and the reference value of the spectral radiance of the reference star instrument is calculated; Based on the relative deviation of each matching sample, the average relative deviation of all matching samples is calculated using the arithmetic mean method; Based on the average relative deviation and the relative deviation of each matching sample, the sample standard deviation is calculated; Based on the sample standard deviation, the transmission repeatability of the spectral radiance of the target star instrument is determined.

[0039] Taking the interstellar spectral radiance value transmission as an example (spectral reflectance transmission repeatability uncertainty The evaluation method is similar), when performing reference-to-target instrument interstellar cross-calibration value transmission, the maximum matching threshold of the time domain, the spatial domain, the spectral domain and the angle domain is respectively: , 、 、 Within the set threshold interval, a series of target instrument spectral radiance measurement values and the corresponding reference values of the reference instrument The reference value of the reference instrument here is the estimated value of the target instrument after the influence of the condition difference is corrected.

[0040] Calculate the relative deviation of the spectral radiance of the target instrument from the reference value of the reference instrument under each matching condition : , (4); Where, is the relative deviation of the spectral radiance of the target instrument from the reference value of the reference instrument; is the spectral radiance measurement value of the target instrument, ( i =1, 2,……, n ), W·cm -2 ·sr -1 nm -1 ; is the spectral radiance reference value of the reference instrument, ( i =1, 2,……, n ), W·cm -2 ·sr -1 nm -1 .

[0041] Calculate the average relative deviation of all matching samples using the arithmetic mean method as the result of this interstellar radiation reference transfer: , (5).

[0042] When the threshold is set small enough, the sample size is large enough, and the obvious systematic influence (spectral angle, system drift during transfer, nonlinearity, environmental factor influence, etc.) is corrected, the differences introduced by the time domain, space domain, spectral domain, and angle domain matching errors are mainly random, that is, the changes in the measurement results are mainly caused by random effects. The standard deviation can be calculated using the Bessel formula as the A-type uncertainty.

[0043] Calculate the divergence of the sample, that is, the relative standard deviation, the A-type standard uncertainty of the average deviation of the spectral radiance transfer : , (6); Where, is the transfer repeatability of the TOA spectral radiance of the target instrument; ​is the TOA spectral radiance measurement value of the target star instrument, i = 1, 2, …, n ), µW·cm -2 ·sr -1 nm -1 ; is the TOA spectral radiance reference value of the reference star instrument, i = 1, 2, …, n ), µW·cm -2 ·sr -1 nm -1 ; n is the number of measurements; is the spectral radiance relative error of each matching sample; is the spectral radiance average relative error of all matching samples.

[0044] It can be understood that the transfer repeatability of the TOA spectral radiance of the target star instrument based on the standard deviation is completely based on the actual measurement data, does not depend on subjective judgment or experience assumption, has high objectivity, and can effectively capture random errors caused by instrument noise, environmental slight fluctuations, reading instability and other factors. The standard deviation after multiple measurements can directly reflect the repeatability performance of the system.

[0045] In S120, the time domain, space domain, spectral domain and angle domain factors are difficult to obtain statistical information through repeated measurement, therefore, the uncertainty is calculated by using the B-type evaluation method. The B-type evaluation includes the time, space, spectrum, angle matching differences in the transfer process, and the uncertainties caused by the imperfection of the model used, the nonlinearity and drift of the measurement system, etc. The B-type evaluation method estimates the variation range of the input quantity based on known technical indicators, historical data, instrument manuals, model prediction, etc., assumes its probability distribution (such as uniform distribution), and then combines the sensitivity coefficient for synthesis.

[0046] In an optional embodiment, the calculation of the spectral radiance uncertainty of the time domain, space domain, spectral domain and angle domain using the B-type evaluation method in the GUM comprises: determining the sensitivity coefficient of the time domain, space domain, spectral domain and angle domain influence; determining the standard uncertainty of the time domain, space domain, spectral domain and angle domain; determining the spectral radiance uncertainty of the time domain influence based on the product of the sensitivity coefficient of the time domain influence and the standard uncertainty of the time domain; determining the spectral radiance uncertainty of the space domain influence based on the product of the sensitivity coefficient of the space domain influence and the standard uncertainty of the space domain; Determining the uncertainty of the spectral radiance affected by the spectral domain based on the product of the sensitivity coefficient of the spectral domain influence and the standard uncertainty of the spectral domain; The uncertainty of the spectral radiance affected by the angular domain is determined based on the product of the sensitivity coefficient affected by the angular domain and the standard uncertainty of the angular domain.

[0047] Furthermore, the determining of the sensitivity coefficients of the time domain, spatial domain, spectral domain, and angular domain influences includes: The first method is used to determine the sensitivity coefficient of the spectral domain influence and the sensitivity coefficient of the angular domain influence; The second method is used to determine the sensitivity coefficient of the time domain impact and the sensitivity coefficient of the space domain impact; The first method is as follows: Fixing other influencing factors unchanged, determining the sensitivity coefficient of the target influencing factor based on the ratio between the relative change in the output spectral radiance of the target star instrument and the input change; The second method is as follows: Based on the ratio between the relative change of the output spectral radiance of the target star instrument and the input change under different transfer application conditions, the sensitivity coefficient of the target influencing factor is determined.

[0048] Here, the sensitivity coefficient describes how the uncertainty component corresponding to the input quantity changes with the standard uncertainty of the input quantity. There are three methods for determining the sensitivity coefficient: mathematical (differentiating the measurement equation), numerical (modeling the instrument in software or changing the input parameters of the measurement equation), and experimental (changing the effect in the laboratory and observing how the measured value changes). When the measurement model can be accurately expressed as a mathematical function, the sensitivity coefficient can usually be obtained by taking the partial derivative of the measurement model with respect to the input quantity. When the measurement model is complex and cannot be easily derived through partial derivatives, the sensitivity coefficient can also be calculated numerically from the measurement model. Numerically, it is equal to the change in the measurand when the input quantity changes by one unit. When a reliable mathematical expression for the sensitivity coefficient is unavailable, the sensitivity coefficient can also be determined experimentally. When experimentally determining the sensitivity coefficient, the input quantity under consideration is changed by a small amount while keeping the other input quantities constant. The change in the measurand is measured simultaneously. The ratio of the change in the measurand to the change in the input quantity is the sensitivity coefficient. The size of the input change should be appropriately selected according to the specific situation. In principle, the smaller the better, so as to avoid the influence of possible nonlinearity. However, if the change is too small, the uncertainty of the measured sensitivity coefficient will increase.

[0049] When the sensitivity coefficient is obtained by numerical calculation or experimental measurement, the following method can be used: If the input x i The estimated value is xi0 with an uncertainty of u x i0 , respectively, under the condition that x i1 x i0 u x i0 and x i2 x i0 u x i0 , respectively, by calculation or by experimental measurement y 1 and y 2, with a sensitivity coefficient c i of: , (7).

[0050] In the field of remote sensing, the measurement model is usually very complex and cannot be simply represented by a mathematical function. Commonly used measurement models are divided into software models and data models.

[0051] For the uncertainty evaluation of the TOA spectral radiance of the target star instrument, when a software model is used (such as the atmospheric radiation transfer model MODTRAN, SCIATRAN, etc., which is generally used for scene simulation to simulate the spectral domain and angular domain effects), if there is a single influencing factor, a perturbation variable can be directly added to the influencing factor to analyze the change in the output TOA spectral radiance relative to the original value (in %), and then the ratio of the relative change to the input perturbation is the sensitivity coefficient. If there are multiple influencing factors (time, space, spectrum, angle, etc.), the other influencing factors need to be fixed and kept unchanged, and then the relative change in the output TOA spectral radiance of the target instrument when the factor under examination is perturbed (in %) is analyzed, and the ratio between the input change and the relative change is the sensitivity coefficient c temporal 、c spatial , c spectral , c GEO .

[0052] ​​​​​​​When using the data model (generally using high-resolution satellite data to simulate the influence of space and time), for the observed target, set different transfer application conditions (including disturbance of the factors to be investigated), and analyze the change amount of TOA spectral radiance relative to the original value. Taking space as an example, set the transfer application conditions (such as target spatial scale, distance constraint, target uniformity constraint, etc.) and possible instrument positioning error, perform spatial translation of the data, analyze the change amount of TOA spectral radiance relative to the original value (unit: %) due to input data translation (positioning error) under different target spatial scale, distance constraint, and target uniformity constraint, and calculate the ratio of the relative change amount to the input data translation amount as the sensitivity coefficient for uncertainty evaluation.

[0053] It can be understood that when using the software model, the other influencing factors are fixed and remain unchanged, and the influence of the change amount of the factor to be investigated on the output target star instrument TOA spectral radiance is analyzed one by one to accurately determine the sensitivity coefficient of each influencing factor; when using the data model, different transfer application conditions are set, and calculations are performed under different constraint conditions to obtain reliable, accurate, and consistent results, thereby accurately determining the sensitivity coefficient.

[0054] Taking interstellar spectral radiance value transfer as an example, the uncertainty of the relative error of the target instrument TOA spectral radiance due to time domain difference (observation time difference, change of the observed target (including atmosphere) during the period), space domain difference (spatial coverage of the observed target), spectral domain difference (difference in spectral response function, wavelength error, spectral characteristics of the observed target), and angle domain difference (observation geometry difference, radiation direction characteristics of the observed target) in formula (3) is evaluated. 、 、 、 .

[0055] First, the sensitivity coefficients of the time domain, space domain, spectral domain, and angle domain are determined c temporal 、c spatial 、 c spectral 、 c GEO Then, the uncertainties of the input amounts of the time domain, space domain, spectral domain, and angle domain are calculated 、 、 、 .

[0056] In an optional embodiment, the determination of the standard uncertainty of the time domain, space domain, spectral domain, and angle domain comprises: determine the standard uncertainty of the time domain influence based on the ratio of the expanded uncertainty (maximum change threshold) of the time domain influence to the coverage factor; determine the standard uncertainty of the spatial domain influence based on the ratio of the expanded uncertainty (maximum change threshold) of the spatial domain influence to the coverage factor; determine the standard uncertainty of the spectral domain influence based on the ratio of the expanded uncertainty (maximum change threshold) of the spectral domain influence to the coverage factor; determine the standard uncertainty of the angular domain influence based on the ratio of the expanded uncertainty (maximum change threshold) of the angular domain influence to the coverage factor.

[0057] In the interstellar transmission of the reference value, the maximum change threshold between the time, space, spectrum and observation geometry between the reference star instrument and the target star instrument is respectively , , , The maximum change threshold can be regarded as the half-width of the coverage interval corresponding to the coverage probability of 100%, that is, the expanded uncertainty of the time domain, spatial domain, spectral domain and angular domain input.

[0058] If the distribution of the sample is known, the coverage factor k can be calculated according to the probability density function corresponding to the distribution k , and the expanded uncertainty divided by is the standard uncertainty of the time domain, spatial domain, spectral domain and angular domain: , , : , (8); , (9); , (10); , (11).

[0059] If the distribution of the sample is unknown, a conservative estimate can be used, assuming that the sample obeys a uniform (rectangular) distribution within the matching interval, and then k = .

[0060] According to formulas (8)-(11), the standard uncertainties of time, space, spectrum and angle matching are calculated , , , , according to the sensitivity coefficients of the time domain, spatial domain, spectral domain and angular domain influence c temporal 、c spatial、 c spectral 、 c GEO , we get the type B uncertainty caused by imperfect matching of time, space, spectrum and angle 、 、 、 : , (12); , (13); , (14); , (15).

[0061] Substituting the above formulas (12)-(15) into formula (3), we can obtain the uncertainty of the relative error of the TOA spectrum radiance of the target instrument during the inter-satellite value transfer process: : , (16); in, c temporal 、 c spatial 、 c spectral 、 c GEO They are the sensitivity coefficients of the target star instrument spectral radiation brightness changes caused by the influence of time domain, space domain, spectrum domain and angular domain respectively; 、 、 、 They are the uncertainties in time domain, space domain, spectrum domain and angle domain, s, km, nm or cm -1 、1.

[0062] It can be understood that combining the sensitivity coefficient and standard uncertainty for Class B assessment can provide a reasonable estimate of the non-repeatable factor; the standard uncertainty of each input quantity multiplied by its sensitivity coefficient can be used to synthesize the total uncertainty to form a complete uncertainty propagation chain.

[0063] Substituting formula (16) into formula (2), we can obtain the relative error of the full-link spectral radiation brightness of the reference star radiation transfer: Uncertainty for: , (17).

[0064] In general, when transferring the reference radiation between reference stars, the expanded uncertainty of the relative error of the TOA spectrum radiation brightness of the target instrument is It can be expressed as: (18).

[0065] The measurement uncertainty component summary table of the relative error of the spectral radiance of the target star instrument during the reference star interstellar radiation reference value transfer is shown in Table 1.

[0066] Table 1 Uncertainty component summary table

[0067] The reference star interstellar radiation reference value transfer full-link uncertainty evaluation method provided by the embodiment of the present application uses the type A evaluation method in the measurement uncertainty expression guide GUM to calculate the transfer repeatability of the spectral radiance of the target star instrument; uses the type B evaluation method in the GUM to calculate the spectral radiance uncertainty influenced by the time domain, the space domain, the spectral domain and the angle domain; determines the uncertainty caused by the transfer process based on the transfer repeatability and the spectral radiance uncertainty influenced by the time domain, the spectral radiance uncertainty influenced by the space domain, the spectral radiance uncertainty influenced by the spectral domain and the spectral radiance uncertainty influenced by the angle domain; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance of the reference star instrument transferred to the target star instrument; determines the reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument and the uncertainty of the spectral radiance measurement value of the target star instrument, and the influence of other factors; the reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained during the interstellar value transfer from the reference star instrument to the target star instrument. The present application constructs a reference star interstellar radiation reference value transfer full-link uncertainty evaluation method based on the GUM measurement uncertainty evaluation method, conforms to the internationally accepted uncertainty evaluation process, clearly includes the uncertainty of the reference value of the reference star instrument, the uncertainty caused by the influence of time, space, spectrum and angle during the transfer process and the uncertainty of the measurement result of the target star instrument, comprehensively covers all sources of uncertainty, and thus accurately evaluates the radiation uncertainty; the type A uncertainty evaluation method is used to calculate the transfer repeatability, which can effectively capture the uncertainty caused by instrument noise, small changes in the atmosphere and the like, is suitable for the calibration of the target star and the reference star in such a long-term monitoring scene, and the time domain, the space domain, the spectral domain and the angle domain factors are usually difficult to obtain statistical information through repeated measurement, so the type B uncertainty evaluation method is used to evaluate the influence of the mismatch of the time domain, the space domain, the spectral domain and the angle domain, which can flexibly cope with the non-repetitive factors, fuse multiple sources of information, and realize the general uncertainty evaluation. The present application constructs a general model for evaluating the full-link uncertainty of the reference star interstellar radiation reference transfer, and provides a general method for evaluating the interstellar transfer uncertainty of the radiation reference star of a series of remote sensing satellites such as meteorology, ocean, high-resolution land and the like.

[0068] The reference star interstellar radiation reference value transmission full-link uncertainty evaluation device provided by the embodiment of the present application is described below, and the reference star interstellar radiation reference value transmission full-link uncertainty evaluation device described below can be correspondingly referred to the reference star interstellar radiation reference value transmission full-link uncertainty evaluation method described above.

[0069] Figure 2 The reference star interstellar radiation reference value transmission full-link uncertainty evaluation device provided by the embodiment of the present application is described below, and the reference star interstellar radiation reference value transmission full-link uncertainty evaluation device described below can be correspondingly referred to the reference star interstellar radiation reference value transmission full-link uncertainty evaluation method described above. Figure 2 As shown in the figure, the reference star interstellar radiation reference value transmission full-link uncertainty evaluation device can include but is not limited to: The A-type evaluation module 210 is configured to calculate the transmission repeatability of the spectral radiance of the target star instrument by using the A-type evaluation method in the measurement uncertainty expression guide GUM; The B-type evaluation module 220 is configured to calculate the spectral radiance uncertainty caused by the time domain, space domain, spectral domain and angle domain by using the B-type evaluation method in the GUM; The transmission calculation module 230 is configured to determine the uncertainty caused by the transmission process based on the transmission repeatability and the spectral radiance uncertainty caused by the time domain, the spectral radiance uncertainty caused by the space domain, the spectral radiance uncertainty caused by the spectral domain and the spectral radiance uncertainty caused by the angle domain; the uncertainty caused by the transmission process is the uncertainty of the spectral radiance caused by the transmission process from the reference star instrument to the target star instrument; The uncertainty calculation module 240 is configured to determine the reference value transmission uncertainty of the target star instrument based on the uncertainty caused by the transmission process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors; the reference value transmission uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained when the reference value is transmitted from the reference star instrument to the target star instrument.

[0070] It should be noted that the reference star interstellar radiation reference value transmission full-link uncertainty evaluation device provided by the embodiment of the present application can execute the reference star interstellar radiation reference value transmission full-link uncertainty evaluation method described in any of the above embodiments when it is actually operated, and the embodiment will not be repeated here.

[0071] Figure 3 An example of an electronic device entity structure schematic diagram is shown in the figure, Figure 3As shown, the electronic device can include a processor 310, a communications interface 320, a memory 330, and a communications bus 340, wherein the processor 310, the communications interface 320, and the memory 330 communicate with each other through the communications bus 340. The processor 310 can invoke the logic instructions in the memory 330 to perform the reference star interstellar radiation reference value transfer full-link uncertainty evaluation method, which includes: calculating the transfer repeatability of the spectral radiance of the target star instrument using the A-type evaluation method in the measurement uncertainty expression guide GUM; calculating the spectral radiance uncertainty caused by the time domain, space domain, spectral domain, and angle domain effects using the B-type evaluation method in the GUM; determining the uncertainty caused by the transfer process based on the transfer repeatability and the spectral radiance uncertainty caused by the time domain effect, the spectral radiance uncertainty caused by the space domain effect, the spectral radiance uncertainty caused by the spectral domain effect, and the spectral radiance uncertainty caused by the angle domain effect; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused in the process of transferring from the reference star instrument to the target star instrument; determining the reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors; the reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained when the reference value is transferred from the reference star instrument to the target star instrument.

[0072] In addition, the logic instructions in the memory 330 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0073] On the other hand, the present invention further provides a computer program product, comprising a computer program, which may be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the uncertainty assessment method for the full-link transfer of reference interstellar radiation reference values ​​provided by the above methods, the method comprising: The transfer repeatability of the target star instrument spectral radiance is calculated using the Class A evaluation method in the Guide to Expression of Uncertainty in Measurement (GUM); Use the Class B evaluation method in the GUM to calculate the uncertainty of spectral radiance caused by the effects in the time domain, spatial domain, spectral domain and angular domain; Determine the uncertainty caused by the transfer process based on the transfer repeatability and the uncertainty of the spectral radiance affected by the time domain, the uncertainty of the spectral radiance affected by the spatial domain, the uncertainty of the spectral radiance affected by the spectral domain, and the uncertainty of the spectral radiance affected by the angular domain; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused by the transfer from the reference star instrument to the target star instrument; Based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors, the reference value transfer uncertainty of the target star instrument is determined; the reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiance of the target star instrument obtained when the inter-satellite reference value is transferred from the reference star instrument to the target star instrument.

[0074] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for assessing uncertainty in the full link of the transfer of reference interstellar radiation reference values ​​provided by the above methods is implemented. The method comprises: The transfer repeatability of the target star instrument spectral radiance is calculated using the Class A evaluation method in the Guide to Expression of Uncertainty in Measurement (GUM); Use the Class B evaluation method in the GUM to calculate the uncertainty of spectral radiance caused by the effects in the time domain, spatial domain, spectral domain and angular domain; Determine the uncertainty caused by the transfer process based on the transfer repeatability and the uncertainty of the spectral radiance affected by the time domain, the uncertainty of the spectral radiance affected by the spatial domain, the uncertainty of the spectral radiance affected by the spectral domain, and the uncertainty of the spectral radiance affected by the angular domain; the uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused by the transfer from the reference star instrument to the target star instrument; Based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors, a reference value transfer uncertainty of the target star instrument is determined; the reference value transfer uncertainty is an uncertainty of a relative error of the spectral radiance of the target star instrument when the interstellar reference value of the reference star instrument is transferred to the target star instrument.

[0075] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0076] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and the necessary general hardware platform, and of course, it can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for assessing uncertainty of the entire link of interstellar radiation reference value transfer, characterized in that: include: The transfer repeatability of the target star instrument spectral radiance is calculated using the Class A evaluation method in the Guide to Expression of Uncertainty in Measurement (GUM); Use the Class B evaluation method in the GUM to calculate the uncertainty of spectral radiance affected by time domain, spatial domain, spectral domain and angular domain; Determine the uncertainty caused by the transfer process based on the transfer repeatability and the spectral radiance uncertainty affected by the time domain, the spectral radiance uncertainty affected by the spatial domain, the spectral radiance uncertainty affected by the spectral domain, and the spectral radiance uncertainty affected by the angular domain; The uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused by the transfer from the reference star instrument to the target star instrument; Determine the reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors; The reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiation brightness of the target star instrument obtained when the intersatellite radiation value is transferred from the reference star instrument to the target star instrument.

2. The uncertainty assessment method for the full link of interstellar radiation reference value transfer according to claim 1 is characterized in that: The transfer repeatability of the target star instrument spectral radiance is calculated using the Class A evaluation method in the Guide to the Expression of Uncertainty in Measurement (GUM), including: Based on the maximum matching thresholds in the time domain, the spatial domain, the spectral domain, and the angular domain, a plurality of groups of matching samples are screened and obtained; each group of matching samples includes a spectral radiance measurement value of a target star instrument and its corresponding spectral radiance reference value of a reference star instrument; For each set of matching samples, calculating a relative deviation between a spectral radiance measurement value of the target star instrument and a spectral radiance reference value of the reference star instrument; Based on the relative deviation of each matching sample, an average relative deviation of all matching samples is calculated using an arithmetic mean method; Calculating a sample standard deviation based on the average relative deviation and the relative deviation of each matching sample; Based on the sample standard deviation, the transfer repeatability of the instrument spectral radiance of the target star is determined.

3. The uncertainty assessment method for the full link of interstellar radiation reference value transfer according to claim 1 is characterized in that: The Class B evaluation method in the GUM is used to calculate the uncertainty of spectral radiance affected by the time domain, spatial domain, spectral domain and angular domain, including: Determine the sensitivity coefficients for time, space, spectral and angular domain effects; Determine standard uncertainties in the time, space, spectrum and angular domains; Determining the uncertainty of the spectral radiance of the time domain influence based on the product of the sensitivity coefficient of the time domain influence and the standard uncertainty of the time domain; Determine the uncertainty of the spectral radiance of the spatial domain influence based on the product of the sensitivity coefficient of the spatial domain influence and the standard uncertainty of the spatial domain; Determining the uncertainty of the spectral radiance affected by the spectral domain based on the product of the sensitivity coefficient of the spectral domain influence and the standard uncertainty of the spectral domain; The uncertainty of the spectral radiance affected by the angular domain is determined based on the product of the sensitivity coefficient affected by the angular domain and the standard uncertainty of the angular domain.

4. The uncertainty assessment method for the full-link transfer of interstellar radiation reference values ​​according to claim 3 is characterized in that: The determination of the sensitivity coefficients of the time domain, space domain, spectrum domain and angular domain influences includes: The first method is used to determine the sensitivity coefficient of the spectral domain influence and the sensitivity coefficient of the angular domain influence; The second method is used to determine the sensitivity coefficient of the time domain influence and the sensitivity coefficient of the space domain influence; The first method is as follows: Fixing other influencing factors unchanged, determining the sensitivity coefficient of the target influencing factor based on the ratio between the relative change in the output spectral radiance of the target star instrument and the input change; The second method is as follows: Based on the ratio between the relative change of the output spectral radiance of the target star instrument and the input change under different transfer application conditions, the sensitivity coefficient of the target influencing factor is determined.

5. The uncertainty assessment method for the full link of interstellar radiation reference value transfer according to claim 3 is characterized in that: The standard uncertainty for determining the effects in the time domain, spatial domain, spectral domain, and angular domain includes: Determining the standard uncertainty of the time domain impact based on the ratio of the expanded uncertainty of the time domain impact to the coverage factor; Determine the standard uncertainty of the spatial impact based on the ratio of the expanded uncertainty of the spatial impact to the coverage factor; Determining the standard uncertainty of the spectral domain impact based on the ratio of the expanded uncertainty of the spectral domain impact to the coverage factor; The standard uncertainty of the angular domain influence is determined based on the ratio of the expanded uncertainty of the angular domain influence to the coverage factor.

6. The method for assessing uncertainty of the entire link of interstellar radiation reference value transfer according to any one of claims 1 to 5, characterized in that: The other influencing factors are uncertainty components of the spectral radiation brightness caused by other factors, and the other factors include at least one of the imperfection factors of the spectral domain correction method, the imperfection factors of the angular domain correction method, the imperfection factors of the measurement model, the system nonlinear factors and the system response drift factors.

7. A device for assessing uncertainty of the entire link of interstellar radiation reference value transmission, characterized in that: include: Class A evaluation module, used to calculate the transfer repeatability of the target star instrument spectral radiance using the Class A evaluation method in the Guide to the Expression of Uncertainty in Measurement (GUM); A Class B assessment module is used to calculate the uncertainty of spectral radiance caused by the effects of time domain, spatial domain, spectral domain and angular domain using the Class B assessment method in the GUM; a transfer calculation module, configured to determine the uncertainty caused by the transfer process based on the transfer repeatability and the uncertainty of the spectral radiance affected by the time domain, the uncertainty of the spectral radiance affected by the spatial domain, the uncertainty of the spectral radiance affected by the spectral domain, and the uncertainty of the spectral radiance affected by the angular domain; The uncertainty caused by the transfer process is the uncertainty of the spectral radiance caused by the transfer from the reference star instrument to the target star instrument; an uncertainty calculation module, configured to determine a reference value transfer uncertainty of the target star instrument based on the uncertainty caused by the transfer process, the uncertainty of the spectral radiance reference value of the reference star instrument, the uncertainty of the spectral radiance measurement value of the target star instrument, and other influencing factors; The reference value transfer uncertainty is the uncertainty of the relative error of the spectral radiation brightness of the target star instrument obtained when the inter-satellite reference value is transferred from the reference star instrument to the target star instrument.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the method for assessing uncertainty of the full link of the transfer of reference inter-stellar radiation reference values ​​is implemented as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for assessing uncertainty of the full link of the transfer of reference inter-stellar radiation reference values ​​as claimed in any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for assessing uncertainty of the full link of the transfer of reference inter-stellar radiation reference values ​​as claimed in any one of claims 1 to 6 is implemented.

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