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GB/T 36540-2018Visible and shortwave infrared spectral reflectance measurement of water (English PDF)

水体可见光-短波红外光谱反射率测量

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 13, 2018

Implementation date

February 1, 2019

Scope

GB/T 36540-2018 is the English-translated version of 水体可见光-短波红外光谱反射率测量.

GB/T 36540-2018 is the Chinese standard "Visible and shortwave infrared spectral reflectance measurement of water". Its scope clause reads: This standard specifies the terms and definitions, measurement conditions, measurement preparation, basic measurement of visible light-short-wave infrared spectral reflectance measurement of water bodies.

Volume, supporting measurement, measurement record, measurement data processing and measurement work summary. This standard is applicable to the acquisition of unfrozen land surface water bodies and coastal water bodies in the wavelength range of 380 nm ~ 2500 nm.

Spectral reflectance data, spectral reflectance measurements of water in the near-ultraviolet range from 300 nm to 380 nm and other unfrozen waters The visible-short-wave infrared spectral reflectance measurement of the body can be performed by reference. Its clauses include terms and definitions.

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Document preview — GB/T 36540-2018

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 75

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and Definitions
4 Measurement conditions
4.1 Measurement environment
4.2 Measurement staff
4.3 Measuring device
5 Measurement preparation
5.1 Measurement Planning
5.2 Measuring device inspection and commissioning
6 basic measurement
6.1 Determination of measurement target
6.2 Determine measurement time
6.3 Spectrometer installation and parameter setting
6.4 Standard Reference Board Placement
6.5 Measurement Step
6.6 Number of measurements
6.7 Measuring speed
6.8 Observation Geometry
6.9 End of measurement
7 supporting measurement
7.1 Measuring point and sampling point positioning
7.2 Physical and physicochemical measurements of water
7.3 Container background spectral reflectance measurement
7.4 Sky light ratio measurement
7.5 Water temperature measurement and meteorological observations
7.6 Image Shooting
8 Measurement record
8.1 Basic Information
8.2 Supporting Information
9 Measurement data processing
9.1 Water body spectral reflectance measurement data processing
9.2 Container background spectral reflectance measurement data processing
9.3 Sky Light Ratio Measurement Data Processing
10 Measurement work summary
10.1 Summary Reporting
10.2 Document Filing
Appendix A (informative) Water body spectral reflectance measurement record table

1 Scope

This standard specifies the terms and definitions, measurement conditions, measurement preparation, basic measurement of visible light-short-wave infrared spectral reflectance measurement of water bodies.

Volume, supporting measurement, measurement record, measurement data processing and measurement work summary.

This standard is applicable to the acquisition of unfrozen land surface water bodies and coastal water bodies in the wavelength range of 380 nm ~ 2500 nm.

Spectral reflectance data, spectral reflectance measurements of water in the near-ultraviolet range from 300 nm to 380 nm and other unfrozen waters

The visible-short-wave infrared spectral reflectance measurement of the body can be performed by reference.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 12936 solar heat utilization terminology

GB/T 13195 Determination of water quality and water temperature Thermometer or reverse thermometer method

GB/T 14950 Photogrammetry and Remote Sensing Terminology

GB 17378.3 Marine monitoring specification Part 3. Sample collection, storage and transport

GB/T 33988 Visible light-short-wave infrared spectrum reflectance measurement of urban features

HJ493 Technical regulations for the preservation and management of water sampling samples

HJ494 Water Quality Sampling Technical Guidance

QX/T 46 Ground meteorological observation specification Part 2. Observation of clouds

QX/T 47 Surface meteorological observation specification Part 3. Meteorological visibility observation

QX/T 51 Ground meteorological observation specification Part 7. Wind direction and wind speed observation

3 Terms and definitions

GB/T 12936, GB/T 13195, GB/T 14950, GB 17378.3, GB/T 33988, HJ493, HJ494, QX/T 46,

The following terms and definitions defined by QX/T 47, QX/T 51 apply to this document.

3.1 Total sunlight

The sum of direct sunlight and sky light (also known as diffuse sunlight) reaching the measurement surface.

Note 1. The quantitative expression is. the total solar irradiance is equal to the sum of the direct sunlight irradiance and the sky light irradiance.

Note 2. If there is no limit to sunlight, it means total sunlight.

3.2 Sky light ratio proportionofskylight

The proportion of sky light that reaches the measurement surface to the total sunlight.

Note. The quantitative expression is the ratio of sky light irradiance to total solar irradiance.

3.3 Container background spectral reflectivity

A container for measuring the spectral reflectance of a water sample, in the vacant state, the absorption and reflection process of the incident light through the inner surface is opened

GB/T 42056 | GB/T 41452 | GB/T 35641 | GB/T 47424 | GB/T 18578 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 13195

Cited by

GB/T 45725-2025Visible to short-wave infrared spectral reflectance measurement of crops

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