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GB/T 41538-2022: Validation of surface emissivity remote sensing products
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Validation of surface emissivity remote sensing products
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GB/T 41538-2022
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Basic data | Standard ID | GB/T 41538-2022 (GB/T41538-2022) | | Description (Translated English) | Validation of surface emissivity remote sensing products | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A77 | | Word Count Estimation | 18,128 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41538-2022: Validation of surface emissivity remote sensing products---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Validation of surface emissivity remote sensing products
ICS 35.240.70
CCSA77
National Standards of People's Republic of China
Authenticity test of surface emissivity remote sensing products
Published on 2022-07-11
2023-02-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Basic requirements 2
5 Inspection method 3
5.1 Inspection method selection 3
5.2 Direct test method 3
5.2.1 Implementation conditions and requirements 3
5.2.2 Spatial Heterogeneity Analysis and Spatial Sampling Methods 3
5.2.3 The method of obtaining the relative true value of surface emissivity 3
5.2.4 Inspection operation process 4
5.3 Cross-check method 4
5.3.1 Implementation Conditions and Requirements 4
5.3.2 Inspection operation process 5
6 Inspection report5
6.1 Cover information5
6.2 Body Information 6
6.2.1 Overview of surface emissivity remote sensing products to be tested6
6.2.2 Reference object description 6
6.2.3 Inspection method and process 6
6.2.4 Authenticity test conclusion description 6
6.2.5 Additional Information 6
6.3 Summary table of inspection report information 7
Appendix A (Informative) Method for Obtaining the Relative True Value of Homogeneous Surface Emissivity 8
Appendix B (Informative) Method for Obtaining the Relative True Value of Heterogeneous Surface Emissivity 9
Appendix C (Informative) Analysis of Uncertainty Sources of Surface Emissivity Authenticity Test 10
Appendix D (Informative) Sample Information of the Authenticity Inspection Report of Earth Emissivity Remote Sensing Products 11
Reference 13
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the Chinese Academy of Sciences.
This document is under the jurisdiction of the National Standardization Technical Committee of Remote Sensing Technology (SAC/TC327).
This document was drafted by. Kunming University of Science and Technology, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Agricultural Sciences, Chinese Academy of Agricultural Sciences
Institute of Agricultural Zoning, Institute of Aerospace Information Innovation, Chinese Academy of Sciences, Beijing Normal University, Northwest Eco-Environmental Resources Research, Chinese Academy of Sciences
College, China Agricultural University, and Capital Normal University.
The main drafters of this document. Tang Bohui, Li Zhaoliang, Li Chuanrong, Xiao Qing, Yan Guangjian, Wu Hua, Duan Sibo, Qian Yonggang, Cheng Jie, Li Zhenhua,
Wu Xuequn, Jin Rui, Huang Jianxi, Zhong Ruofei, Qiu Shi, Liu Zhaoyan.
Introduction
Surface emissivity is a key characteristic parameter in thermal infrared remote sensing retrieval, and it has the same important status as surface temperature. it is gas
It is an important input parameter in the study of climatic models and a very important characteristic physical quantity in the process of the Earth's surface system. surface launch
The rate is the ratio of the thermal radiation emitted from the surface to the thermal radiation emitted by a black body at the same temperature and the same wavelength.
Roughness, soil moisture, wavelength and other factors. At present, the use of remote sensing means to retrieve regional surface emissivity is to obtain large-scale surface emissivity.
Therefore, it is very important to carry out the authenticity test of pixel-scale surface emissivity remote sensing products.
Combining with the existing international methods for authenticity testing of various surface emissivity remote sensing products, this document comprehensively, systematically and deeply develops
Standardized research on authenticity inspection of surface emissivity remote sensing products.
The authenticity test method and evaluation method of the product make it maneuverable and universal while ensuring the advanced nature, which is the basis for the remote sensing of surface emissivity.
It provides a unified standard for the standardization of precision evaluation and uncertainty analysis of sensing products.
Authenticity test of surface emissivity remote sensing products
1 Scope
This document specifies the basic requirements, inspection methods and inspection reports for the authenticity inspection of surface emissivity remote sensing products.
This document is applicable to the authenticity verification of surface emissivity retrieval products from aerial and aerospace remote sensing data.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 36296-2018 Guidelines for the authenticity inspection of remote sensing products
GB/T 39468-2020 General method for authenticity inspection of terrestrial quantitative remote sensing products
3 Terms and Definitions
The terms and definitions defined in GB/T 36296-2018 and GB/T 39468-2020 and the following terms and definitions apply to this document.
3.1
[spectral] emissivity [spectral] emissivity
[Spectral] Emissivity
The ratio of the thermal radiator's own [spectral] radiation [radiation] brightness to the spectral radiation [radiation] brightness of a black body at the same temperature and the same wavelength, also known as [spectrum]
specific emissivity.
Note. The expression of [spectrum] emissivity is shown in formula (1).
ε(λ,T)=
R(λ,T)
B(λ,T)
(1)
where.
ε(λ,T)---spectral emissivity;
λ --- wavelength, in microns (μm);
T --- temperature, in Kelvin (K);
R(λ,T)---the own [spectral] radiation [radiation] brightness of the thermal radiator, in watts per square meter steradian [W/(m2·sr·μm)];
B(λ,T)---Planck's function of temperature T, in watts per square meter steradian [W/(m2·sr·μm)].
3.2
channel emissivity
channel emissivity
In the sensor channel response range, the weighted average of the spectral emissivity and the channel spectral response function product.
Note. The channel emissivity expression is shown in formula (2).
εi =
λmax
λmin
ε(λ,T) RSR(λ)dλ
λmax
λmin
RSR(λ)dλ
(2)
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