GB/T 41281-2022Validation of photosynthetically active radiation remote sensing products (English PDF)
光合有效辐射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 41281-2022 is the English-translated version of 光合有效辐射遥感产品真实性检验.
GB/T 41281-2022 sets the validation of photosynthetically active radiation remote sensing products. It fixes the reference against which the product is checked, the basic requirements of the validation, the methods by which it is carried out and the content of the validation report.
It applies to the validation of photosynthetically active radiation products, the figures on which crop and vegetation models depend. Space agencies, product producers and the research users of the data use it. Issued on 9 March 2022, it has applied since 1 October 2022.
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Document preview — GB/T 41281-2022
National Standard of the People's Republic of China
- ICS
- 07.040
- 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 Reference object
- 5 Basic requirements
- 6 Inspection method
- 7 Inspection report
- Appendix A (Informative) Global Photosynthetically Active Radiation and Total Radiation Ground Observation Data List
- Appendix B (Informative) Spatial Representative Evaluation Method
- Appendix C (normative) Observation sample point layout and photosynthetic active radiation ground observation
- Appendix D (Informative) Time Consistency Conversion Methods
- Appendix E (Informative) Example of Authenticity Inspection Information of Photosynthetically Active Radiation 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
Photosynthetically active radiation is the energy in solar radiation that can be used by green plants for photosynthesis. Photosynthetically active radiation as a form of biomass It directly affects the growth, development, yield and quality of plants. Photosynthetically active radiation remote sensing products can provide global and regional The scale of photosynthetically active radiation is of great significance in the study of photosynthetic potential, crop growth simulation, carbon cycle, and global change.
The purpose of this document is to unify the authenticity test reference objects, test objects of photosynthetically active radiation remote sensing products of different types and different temporal and spatial resolutions. process and inspection methods, and form indicators and methods for quality evaluation of photosynthetically active radiation remote sensing products to ensure that photosynthetically active radiation remote sensing products are in Consistency and product quality in scientific research and industrial applications. Authenticity test of photosynthetically active radiation remote sensing products
1 Scope
This document specifies the reference objects, basic requirements, inspection methods and inspection reports for the authenticity inspection of photosynthetically active radiation remote sensing products.
This document is applicable to the authenticity inspection of photosynthetically active radiation remote sensing products.
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 Solar radiation
Electromagnetic radiation emitted by the sun. [Source: GB/T 36299-2018, 2.3]
3.2 Photosynthetically active radiation
In the solar radiation spectrum, the radiation energy of a certain band that can be absorbed, transformed and used to synthesize organic substances by the plastid pigments of green plants.
Note: Generally, the solar radiation of 400nm~700nm is called photosynthetically active radiation. [Source: GB/T 31163-2014, 5.8]
3.3 Shortwaveradiation
Electromagnetic radiation with wavelengths ranging from 0.28 µm to 3 µm. [Source: GB/T 31163-2014, 5.9]
3.4 Direct radiation
Radiation emanating from the surface of the sun and within a small solid angle around it.
NOTE: In general, direct radiation is measured by an instrument with a field angle of about 5°. Therefore, it includes part of the scattered radiation around the solar surface, the circumsolar radiation, The field of view of the sun itself is only about 0.5°. [Source: GB/T 31163-2014, 5.11]
3.5 Diffuse radiation
Solar radiation is dispersed by air molecules, clouds and various particles in the air into radiation that is non-directional but does not change its monochromatic composition.
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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
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