QX/T 464-2018 in English
VALIDS-band dual linear polarization Doppler weather radar
- Issued on:2018-12-12
- Implemented on:2019-04-01
- File Format:PDF
- Delivery:Via email within 10 business days
$1,164.00
Introduction
Analysis of the Standard's Core Content
This standard specifies the technical requirements for S-band dual-polarization Doppler weather radars with klystron transmitters, and applies to the entire radar design, production, and acceptance process. This standard systematically defines, for the first time, the performance specifications for key components of dual-polarization radars, such as the radome and servo system.
Comparison of Key Technical Indicators
| Parameter Category | Indicator Requirements | Test Method |
|---|---|---|
| Operating Frequency | 2.7-3.0GHz | Spectrum Analyzer Measurement |
| Minimum Measurable Echo Intensity | ≤-4.5dBz@50km | Basic Data Statistical Analysis |
| Dual-Polarization Consistency | Beam Pointing Deviation≤0.05° | Turntable Servo Test |
| Phase Noise | ≤0.06° | I/Q Data Phase Analysis |
Typical Application Scenarios
Heavy Rainfall Monitoring Case Study: When heavy rainfall mode is activated, the radar must complete a 14-layer volume scan (0.5°-19.5°) within 6 minutes. Using differential reflectivity factor and correlation coefficient data, the radar can effectively identify raindrop size distribution and precipitation particle phase.
System Calibration Requirements: The standard mandates nine automatic online calibration functions, including receive channel gain difference calibration (≤0.2dB) and phase difference calibration (≤3°).
Implementation Recommendations
- Give priority to the operating mode that supports simultaneous H/V transmission and reception
- Regularly check the beam deviation introduced by the radome (≤0.03°)
- Establish a base data quality control system, focusing on monitoring the differential propagation phase shift error
- Reliability design with MTBF ≥ 1500h should be included in the procurement technical requirements
Standard Evolution Analysis
Compared with GB/T12648-1990, this standard adds the following:
- Quantitative indicators of dual-polarization parameters (such as correlation coefficient ≤ 0.01 error)
- Automatic switching mechanism for intelligent observation mode
- Remote diagnosis and maintenance function requirements
- Complete electromagnetic compatibility design specifications
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