GB/T 27964-2011 English PDF

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GB/T 27964-2011: Grade of fog forecast
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 27964-2011	169	Add to Cart	3 days	Grade of fog forecast	Valid

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Basic data

Standard ID: GB/T 27964-2011 (GB/T27964-2011)
Description (Translated English): Grade of fog forecast
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Classification of International Standard: 07.060
Word Count Estimation: 7,753
Date of Issue: 2011-12-30
Date of Implementation: 2012-03-01
Regulation (derived from): Announcement of Newly Approved National Standards No. 23 of 2011
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the fog forecast levels. This standard applies to fog forecasting and warning.

GB/T 27964-2011: Grade of fog forecast

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Grade of fog forecast ICS 07.060 A47 National Standards of People's Republic of China Fog forecast Ratings Issued on. 2011-12-30 2012-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by the China Meteorological Administration. This standard by the national meteorological disaster prevention and mitigation Standardization Technical Committee (SAC/TC345) centralized. This standard was drafted. National Meteorological Center. The main drafters of this standard. Gui-Ming Yang, Lin Jian Zong Zhiping.

Introduction

Fog is one of the major weather disasters in China. Fog with a high frequency of occurrence, affecting a wide range of features and serious hazard. To fog Transport and human health impacts and hazards. Develop forecasts grading standards of national unity help standardize fog fog forecasting and warning services. Fog forecast Ratings

1 Scope

This standard specifies the fog forecast levels. This standard applies to fog forecasts and warnings.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Fog fog Suspended in the near surface atmosphere of a large number of fine milky droplets or ice crystals visible aggregates. 2.2 Visibility visibility According to meteorological observation norms, normal vision (sense of contrast threshold of 0.05) who, at the time weather conditions, it is possible from the sky in the background See and identify the target (black, size appropriate) the maximum distance. In meters (m). Principles and Level 3 division 3.1 Principles division Fog was based on the level of visibility. 3.2 rating V to represent visibility. Fog forecast level in Table 1. Table 1 rating fog forecast Visibility Level Mist 1000m≤V < 10000m Fog 500m≤V < 1000m Fog 200m≤V < 500m Strong fog 50m≤V < 200m Particularly strong fog V < 50m ......

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