GB/T 41279-2022Validation of albedo remote sensing products (English PDF)
反照率遥感产品真实性检验
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 9, 2022
Implementation date
October 1, 2022
Scope
GB/T 41279-2022 is the English-translated version of 反照率遥感产品真实性检验.
GB/T 41279-2022 sets the validation of albedo remote sensing products, that is how the figures a satellite product gives for the reflectance of the surface are checked against reality.
It fixes the basic requirements of the validation, the methods by which it is carried out - the ground measurements, the scaling from point to pixel and the statistics that compare them - and the content of the validation report.
It applies to the validation of albedo products of the land surface and of water surfaces. Space agencies, product producers and the users who rely on the data use it. Issued on 9 March 2022, it has applied since 1 October 2022.
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Document preview — GB/T 41279-2022
National Standard of the People's Republic of China
- ICS
- 33.200
- Classification
- A 77
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Basic requirements
- 5 Inspection method
- 5.1 Selection of inspection methods and requirements for inspection objects
- 5.2 Direct Test Method
- 5.3 Indirect test method
- 6 Inspection report
- 6.1 Cover information
- 6.2 Body Information
- 6.3 Summary table of inspection report information
- Appendix A (Informative) Spatial Representative Evaluation Method
- Appendix B (normative) Uplink/Downlink Radiation Measurements
- Appendix C (Informative) Ground Measurement Radiation Data Processing
- Appendix D (normative) Band Conversion Calculation
- Appendix E (normative) True Albedo Calculation
- Appendix F (Informative) Method for Obtaining the Sky Scattered Light Ratio
- Appendix G (Informative) Sample Information of Authenticity Inspection Report of Albedo Remote Sensing Products
- Reference
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.
Introduction
Surface albedo reflects the ability of the Earth's surface to reflect solar radiation. As an important parameter of the earth's radiation budget, the surface reaction Irradiance is of great significance in the study of Earth's energy balance, medium and long-term weather forecasting, and global change.
At present, remote sensing data are processed in series through remote sensing models and inversion methods, and various global or local regional inversions have been published at home and abroad.
Illuminance remote sensing products. The purpose of this document is to formulate scientific and standardized methods and procedures for the authenticity inspection of albedo remote sensing products, which is conducive to comprehensive and objective To evaluate its accuracy and analyze its uncertainty, improve the quality of albedo remote sensing products, and promote the quantitative application of albedo remote sensing products. Authenticity inspection of albedo remote sensing products
1 Scope
This document specifies the basic requirements, inspection methods and inspection methods for the authenticity inspection of the albedo remote sensing products of the surface to the solar radiation reflection band. inspection report.
This document is applicable to the authenticity verification of albedo remote sensing products of land surface and water body surface.
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 the following apply to this document.
3.1 Albedo
The ratio of the radiant flux reflected from the surface of the object to the hemisphere (2pi) space to the radiant flux incident on the object surface in the hemisphere (2pi) space. [Source: GB/T 36299-2018, 3.8]
3.2 Black sky albedo
In the case of only considering direct light irradiation, the radiant flux reflected from the surface of the object to the hemisphere (2pi) space and the incident direct radiant flux Ratio. [Source: GB/T 36299-2018, 3.11]
3.3 Whitesky albedo
In the case of only considering the scattered light irradiation, the radiant flux reflected from the surface of the object to the hemisphere (2pi) space and the incident scattered radiant flux Ratio. [Source: GB/T 36299-2018, 3.12]
3.4 True albedo
In the real natural situation where the incident radiation includes both direct light irradiation and scattered light irradiation, the surface of the object reflects in the hemisphere (2pi) space The ratio of the radiant flux to the incident radiant flux.
3.5 Diffuse fraction
The ratio of the incident sky scattered radiant flux to the incident radiant flux.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.
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Related Standards
GB/T 36296-2018 — Guide for the validation of remote sensing products
GB/T 39468-2020 — General methods for the validation of terrestrial quantitative remote sensing products
GB/T 7251.4-2026 — Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)
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