GB/T 12649-2017 English PDF

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GB/T 12649-2017: Measuring methods for meteorological radar parameters
Status: Valid

GB/T 12649: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12649-2017	859	Add to Cart	7 days	Measuring methods for meteorological radar parameters	Valid
GB/T 12649-1990	RFQ	ASK	6 days	Measuring methods for meteorological radar parameters	Obsolete

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Basic data

Standard ID: GB/T 12649-2017 (GB/T12649-2017)
Description (Translated English): Measuring methods for meteorological radar parameters
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M50
Classification of International Standard: 33.200
Word Count Estimation: 43,431
Date of Issue: 2017-07-31
Date of Implementation: 2018-02-01
Older Standard (superseded by this standard): GB/T 12649-1990
Quoted Standard: GB/T 3784-2009; GJB 74A-1998; SJ/T 2534.2
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 main technical parameters of meteorological radar (hereinafter referred to as radar, including wind radar, weather radar, cloud radar, etc.) the main technical parameters test method. This standard applies to the meteorological radar production and acceptance of the main technical parameters of the test.

GB/T 12649-2017: Measuring methods for meteorological radar parameters

---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.
Measuring methods for meteorological radar parameters ICS 33.200 M50 National Standards of People's Republic of China Replacing GB/T 12649-1990 Weather Radar Parameter Test Method 2017-07-31 Posted 2018-02-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 test the general requirements 1 4.1 Instruments 1 4.2 Test conditions 2 5 The main technical parameters of the test method 2 5.1 Detection range 2 5.2 Measurement accuracy 2 5.3 Maximum tracking speed 3 5.4 Maximum angular acceleration 3 5.5 operating frequency 3 5.6 improvement factor 4 5.7 machine phase stability 6 5.8 photoelectric axis matching accuracy 6 5.9 Antenna pattern 7 5.10 radome loss 9 5.11 Lobe crosspoint level 9 5.12 electric axis drift 10 5.13 oblique beam pointing angle 11 5.14 vertical lobe pointing angle 11 5.15 VSWR 12 5.16 transceiver isolation 13 5.17 days feeder system loss 13 5.18 power capacity 14 5.19 transmitting frequency 14 5.20 RF pulse spectrum 15 5.21 pulse power (peak power) 16 5.22 RF pulse envelope 17 5.23 pulse repetition frequency 17 5.24 receiver sensitivity 18 5.25 noise figure 18 5.26 receiver IF frequency 21 5.27 receiver IF bandwidth 22 5.28 Sensitivity Time Gain Control (STC) 24 5.29 receiver gain 24 5.30 receiver dynamic range 25 5.31 Logarithmic Dynamic Range 26 5.32 System Dynamic Range 27 5.33 self-frequency tracking accuracy 27 5.34 sounding received from the frequency range 29 5.35 sounding received from frequency control tracking accuracy 29 5.36 Weather Radar Signal Processing/Data Processing Terminal 30 Wind Profile Radar Data Processing Terminal 5.38 High altitude weather radar data processing terminal 31 5.39 Distance calibration error 31 5.40 antenna control method 32 5.41 antenna control accuracy 33 5.42 antenna control sensitivity 34 5.43 Antenna control subsystem amplitude frequency characteristics 34 5.44 Directional Sensitivity 35 5.45 encoder angle resolution 35 5.46 Cone sweep frequency 36 5.47 tachometer feedback depth 36 5.48 Antenna Control Subsystem Position Step Response 37 5.49 Intensity estimation accuracy 38 5.50 speed processing accuracy of 39 5.51 Other parameters 39

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12649-1990 "weather radar parameter testing methods." This standard and GB/T 12649-1990 compared to the main technical content changes are as follows. --- Increased the terms of the test items (see 5.4,5.6,5.7,5.8,5.13,5.16,5.17,5.29,5.32,5.34,5.35,5.45,5.48, 5.49, 5.50). --- By GB/T 3784 modified terms and definitions. --- The main technical parameters of the test method According to the current weather radar typical test methods were revised. --- The original test items 41, after an increase, deletion, revision of a total of 51 test items. --- Terms related to the change of name of the clauses are as follows. "Tracking speed" to "Maximum tracking speed" (see 5.3,.1990 version 5.3); "Operating frequency range (working bandwidth)" "Operating frequency" (see 5.5),.1990 version 5.12; "radome attenuation" to "radome loss" (see 5.9.10,.1990 edition) 5.5); "Crossing level" to "Lobe crosspoint level" (see 5.1.1,.1990 version 5.6); "Receiver sensitivity and sensitivity are stable Qualitative "to" Receiver sensitivity "(see 5.24,.1990 version 5.17);" Self-frequency tracking accuracy "to" Self-frequency tracking fine Degrees "(see 5.33,.1990 version 5.24);" Plane Position Indicator (PPI), Slope Height Indicator (RHI) and high horizontal distance DHI, REI, A/R Display, Photo Display, Digital Video Point Processing System (DVIP), data processing system "to" weather radar signal processing/data processing terminal "," wind profiler radar data processing terminal End "," high altitude weather radar data processing terminal "(see 5.36, 5.37, 5.38,.1990 edition of 5.25,5.26,5.27,5.28, 5.29,5.30,5.32); "The working method of antenna control system" is replaced by "Antenna control method" (see 5.440,.1990 version 5.33); "The frequency characteristics of the weather system" was replaced by "The amplitude-frequency characteristics of the antenna control subsystem" (see 5.33, version 5.37 of.1990); " Feedback Depth "to" Tachograph Feedback Depth "(see 5.447,.1990 version 5.40). --- Removed "Plane Position Indicator (PPI)" (1990 version 5.25), "Slope Height Indicator (RHI) and Horizontal Distance Height Display (DHI) "(1990 version 5.26)," Slope Angle Elevation Display (REI) "(1990 version 5.27)," A/R Display " (1990 version 5.28), Photographic Displays (1990 version 5.29), Digital Video Integrator System (DVIP) (1990 Version 5.30). This standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This standard by the China Electronics Standardization Institute centralized. This standard was drafted .081 Electronic Group Co., Ltd.. The main drafters of this standard. Xiao Chunhua, Hu Rong, Zhao Yu Guo, Xie Liuqing, Zhang Qiang, Li Shouqin, Yang Jianping, Wu Bin. This standard replaces the standards previously issued as. --- GB/T 12649-1990. Weather Radar Parameter Test Method

1 Scope

This standard specifies the main technical parameters of the weather radar (hereinafter referred to as radar, including wind measurement radar, weather radar, cloud detection radar, etc.) method. This standard applies to the weather radar production and acceptance of the main technical parameters of the test.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. Electrotechnical terminology radars General Specification for GJB74A-1998 Military Ground Radar SJ/T 2534.2 Antenna test method Antenna test field design

3 Terms and definitions

GB/T 3784-2009 defined and the following terms and definitions apply to this document. 3.1 Meteorological radar The general term used to detect meteorological elements such as atmospheric wind, temperature, pressure and humidity as well as meteorological targets such as clouds and precipitation, including wind measurements Radar, weather radar and cloud detection radar. [GB/T 3784-2009, Definition 2.1.2.25] 3.2 Wind-finding radar Radars used to detect meteorological elements such as wind, temperature, pressure and humidity in the atmosphere include high altitude weather radar, wind profile radar and Doppler laser wind measurement radar. [GB/T 3784-2009, definition 2.1.2.26] 3.3 Weather radar weatherradar Used to detect atmospheric Cumulonimbus, thunderstorms and other precipitation systems, the intensity, scope and changes, the average radial velocity of cloud and precipitation particles and Speed spectrum radar. Also known as rain radar. Including co-ordinated weather radar and non-co-ordinated weather radar. Coherent weather radar also known as Doppler days Gas radar, non-co-ordinate weather radar is also known as conventional weather radar. [GB/T 3784-2009, Definition 2.1.2.30]

4 test the general requirements

4.1 Instrumentation The instrumentation and test equipment used to control or monitor the test parameters shall be within the valid test period with a precision not less than that of the test strip ......

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