GB/T 41540-2022Selection and arrangement of the surface observation field for the validation of terrestrial remote sensing products (English PDF)
陆地遥感产品真实性检验地面观测场的选址和布设
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 11, 2022
Implementation date
February 1, 2023
Scope
GB/T 41540-2022 is the English-translated version of 陆地遥感产品真实性检验地面观测场的选址和布设.
GB/T 41540-2022 says how to choose and lay out a ground observation field used to check the authenticity of terrestrial remote sensing products.
It covers the naming of the site, the general rules for choosing it - regional representativeness, openness and convenience - and the general requirements on size, topography, surface cover and surrounding environment.
It then sets the layout of the routine measurements, from meteorological and soil elements to control points, atmospheric aerosol optical depth, flux and sounding observations, and the layout of the observations of the product being checked: basic sampling unit, single-point, multi-point, footprint and multi-scale nested systems.
It closes with the ground observation field report. It cites GB/T 35221-2017, GB/T 39468-2020 and QX/T 69-2007, was issued on 11 July 2022 and has applied since 1 February 2023.
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Document preview — GB/T 41540-2022
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 Observation site naming
- 5 General rules for site selection
- 5.1 Regional representation
- 5.2 Openness
- 5.3 Convenience
- 6 General requirements for site selection
- 6.1 Size
- 6.2 Topography
- 6.3 Surface Cover
- 6.4 Environment
- 7 Routine observation layout
- 7.1 Observation of meteorological elements
- 7.2 Soil element observation
- 7.3 Control point layout and position measurement
- 7.4 Atmospheric aerosol optical depth observations
- 7.5 Flux observations
- 7.6 Sounding observations
- 8 Ground observation layout of remote sensing products to be inspected
- 8.1 Basic sampling unit layout
- 8.2 Single-point observation layout
- 8.3 Multi-point observation layout
- 8.4 Footprint observation layout
- 8.5 Layout of multi-scale nested observation systems
- 9 Ground Observation Site Report
- Appendix A (Informative) Surface Observation Site Reporting Format
- 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
Authenticity inspection of remote sensing products is a process of independently evaluating the accuracy and uncertainty of remote sensing products based on reference data.
The ground observation field is one of the basic conditions for the authenticity test of remote sensing products.
Provide important ground support with a series of processes such as Verification of authenticity of terrestrial remote sensing products The obtained observation data satisfies the temporal continuity.
At home and abroad, research and practice on site selection and layout of ground observation sites for effective verification of the authenticity of terrestrial remote sensing products have been carried out.
Ground observation stations and observation plots for authenticity verification of terrestrial remote sensing products. In order to support different surface observation stations and observation plots The popularization and application of the obtained data in the authenticity test of remote sensing products has formulated a scientific and standardized ground view for the authenticity test of terrestrial remote sensing products. Site selection and observation system layout standards.
1 Scope
This document specifies the nomenclature, general rules for site selection, general requirements for site selection, routine Observation deployment, ground observation deployment of remote sensing products to be inspected, and ground observation field reports.
This document is applicable to the site design and construction of ground observation sites and the layout of observation instruments for authenticity verification of terrestrial quantitative 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 35221-2017 General rules for ground meteorological observation
GB/T 39468-2020 General method for authenticity inspection of terrestrial quantitative remote sensing products
QX/T 69-2007 Atmospheric Turbidity Observation-Solar Photometer Method
3 Terms and Definitions
The terms and definitions defined in GB/T 39468-2020 and the following terms and definitions apply to this document.
3.1 Ground observation field
Observing instruments and facilities are installed to obtain ground observation data required for the authenticity verification of remote sensing products, and remote sensing synchronous observation and processing are carried out. A dedicated site for intensive observation.
3.2 Basic sampling unit
The ground measurement unit corresponding to the spatial resolution of the remote sensing product to be inspected is deployed in the ground observation field.
3.3 Observing point
The location of the observations laid out in the basic sampling unit.
Note: Observation includes automatic observation instrument, manual operation observation instrument or manual sampling indoor measurement, etc.
3.4 Footprint
A function describing the relationship between the spatial distribution of a surface source or sink in the near-surface layer and the value of the instrumentally observed flux.
Note: Also known as the source weight function.
3.5 Observing source area
The area where footprint observations make a major contribution to the observed value.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 35221-2017 — Specifications for surface meteorological observation—General
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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