QX/T 552-2020 in English
VALIDScales for space weather warning
- Issued on:2020-06-16
- Implemented on:2020-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
本标准规定了空间天气预警的等级划分。
本标准适用于空间天气预警业务和服务。
Introduction
Standard Background and Technical Evolution
This standard establishes my country's complete space weather warning level system for the first time, filling the gap in standardization between solar activity monitoring and space environment warning. With the construction of monitoring systems such as the Fengyun satellite series and the Meridian Project, my country's space weather monitoring capability has developed from a single ground observation to a space-ground integrated monitoring network.
Analysis of core terms
| Terms | Physical meaning | Monitoring methods |
|---|---|---|
| Kp index | Global geomagnetic activity index, reflecting the efficiency of solar wind energy injection | Joint observation of the global geomagnetic network |
| TEC value | Total electron content in the ionosphere, affecting satellite navigation accuracy | GNSS dual-frequency receiver inversion |
Comparison and analysis of warning levels
| Warning level | Key Parameter Thresholds | ||||
|---|---|---|---|---|---|
| Solar Flare (Fx) | Proton Event (Ip) | Geomagnetic Storm (Kp) | Energy Electron Burst (Ie) | Ionosphere (TEC) | |
| Red | ≥2×10-3 J/(m²·s) | ≥104 pfu | 9 | ≥5×109 e/cm² | 200 TECU |
| Orange | [1-2)×10-3 | [103-104) | 8 | [3-5)×109 | 175-200 |
Typical Application Cases
Solar flare event in September 2017: A X9.3-class flare (Fx=9.3×10-3) was detected, triggering a red alert, which caused shortwave communications in northern my country to be interrupted for 3 hours.
Geomagnetic storm in November 2021: Kp index reached 8, and the positioning error of the Beidou system increased to 15 meters during the orange warning period.
Implementation suggestions
- Multi-source data fusion: Combine the FY-4 satellite X-ray flowmeter with GOES satellite data for cross-validation
- Warning response mechanism: When a red warning is issued, the spacecraft safety mode should be activated and polar flights should be suspended
- Public science popularization: Establish an associated interpretation of space weather warnings and aurora observations
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