GB/T 35223-2017 in English

VALID

Specifications for surface meteorological observation―Meteorological visibility

Issued on:2017-12-29
Implemented on:2018-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 35223-2017
Document status:	VALID
Title in English:	Specifications for surface meteorological observation―Meteorological visibility
Title in Chinese:	地面气象观测规范气象能见度
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-12-29
Implemented on:	2018-07-01
ICS Classification:	07.060-Geology. Meteorology. Hydrology
Chinese Classification:	A47-Meteorology
Professional Classification:	GB-National Standard
Related Keywords:	meteorological observation ― meteorological visibility introduction meteorological visibility meteorological visibility observations manual observation meteorological meteorological visibility ±5 %
Related Topics:	elephant GB/T 35223-2017 Surface Meteorological Observation Specifications for Wind Direction and Wind Speed gb/t+35223 meteorological peak Meteorological phase visibility weather observation equipment Earth atmosphere weather observation weather observation Surface Meteorological Observations weather station degree GBT35223 GB/T 35223-2017 Gradient meteorological monitoring system Meteorological industry standard ground meteorological observation site , weather station land Meteorological greenhouse gas observation methods The latest version of the design specifications for meteorological observation sites Ground meteorological observation specifications for fog Weather station land Ground meteorological observation station technology Meteorological observation equipment place Visibility detector Fog ground observation Standard meteorological observation site Meteorological observation site pool size

《GB/T 35223-2017地面气象观测规范气象能见度》由TC507（全国气象仪器与观测方法标准化技术委员会）归口，主管部门为中国气象局。

Introduction

1. Standard Overview

The National Standard of the People's Republic of China GB/T 35223-2017 "Specification for Meteorological Visibility in Ground-Based Meteorological Observations" specifies the technical requirements and methods for observing meteorological visibility in ground-based meteorological observations. This standard applies to the measurement of meteorological visibility in ground-based meteorological observations, covering both manual observation and instrumental measurement.

2. Comparison of standard frameworks

Standard content	Technical requirements	Scope of application
Definition of meteorological visibility	The maximum distance at which a person with normal vision can see a target under the current weather conditions	Applicable to ground observation
Effective meteorological visibility	The minimum distance that can be reached within an angle of more than one-fourth of the perimeter	Used for manual observation
Meteorological optical visibility	Measured based on the transmission method and scattering method	Used for instrument measurement

3. Measurement method of meteorological visibility ±5% 60 seconds Measurement under uniform atmospheric conditions Scattering method ±10% 60 seconds Measurement under complex meteorological environment

4. Implementation Suggestions

In order to ensure the accuracy and consistency of meteorological visibility observations, the following measures are recommended:

Select observation sites with wide and unobstructed views
Regularly calibrate measuring instruments to ensure that the accuracy meets the requirements
Train observers to master target selection and observation skills
Establish meteorological visibility data archives for easy analysis and research

More samples: YD/T 3934-2021 JJG 21-2008 GB 50021-2001(2009)

Sample only — not a preview of GB/T 35223-2017

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