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GB/T 41541-2022Basic terminology of thermal infrared remote sensing (English PDF)

热红外遥感基本术语

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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 41541-2022 is the English-translated version of 热红外遥感基本术语.

GB/T 41541-2022 is the Chinese national vocabulary of thermal infrared remote sensing. It defines the general terms and the terms specific to homogeneous and to non-uniform surfaces, and it covers research, teaching and industrial work in the 6 micrometre to 15 micrometre band.

The general terms start from thermal infrared radiation itself and take in radiance, spectral radiance, radiant exitance and spectral radiant exitance, each with its unit, and the blackbody.

Several entries are taken from GB/T 36299-2018 with or without modification. Two informative annexes give the thermal infrared radiative transfer equation and the common temperature inversion algorithms, and a bibliography and an index close the document.

It has no normative references, was issued on 11 July 2022 and has applied since 1 February 2023.

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Document preview — GB/T 41541-2022

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

Preface
1 Scope
2 Normative references
3 General terms
4 Terminology for uniform surfaces
5 Terms specific to non-uniform surfaces
Appendix A (Informative) Thermal Infrared Radiation Transfer Equation
Appendix B (Informative) Common Temperature Inversion Algorithms
Reference
Index

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.

1 Scope

This document defines general terms, terms specific to homogeneous surfaces and terms specific to non-uniform surfaces involved in thermal infrared remote sensing.

This document is suitable for scientific research, education and industrial applications of thermal infrared remote sensing in the 6µm ~15µm spectral range.

2 Normative references

There are no normative references in this document.

3 General terms

3.1 Thermal infrared radiation

Electromagnetic radiation in the spectral range of 6µm ~ 15µm.

3.2 Radiance

The radiant flux of a radiation source per unit projected area and per unit solid angle.

Note: The unit is watt per square meter steradian [W/(m2·sr)]. [Source: GB/T 36299-2018, 2.8]

3.3 Spectral radiance

Radiant [radiative] brightness per unit wavelength or unit wavenumber interval.

Note: The unit is watts per square meter steradian micrometer [W/(m2·sr·µm)] or watts per square meter steradian minus square centimeter [W/(m2·sr·cm-1)]. [Source: GB/T 36299-2018, 2.9, with modifications]

3.4 Radiant exitance; radiant emittance

Radiant flux emitted per unit area of an object with a temperature greater than absolute zero.

Note: The unit is watt per square meter (W/m2). [Source: GB/T 36299-2018, 2.12, with modifications]

3.5 Spectral radiant exitance; spectral radiant emittance

The degree of [radiation] emission per unit wavelength or unit wavenumber interval.

Note: The unit is watts per square meter micrometer [W/(m2·µm)] or watts per square meter minus one square centimeter [W/(m2·cm-1)].

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

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