QX/T 562-2020 in English

Interpretation of the core content of the standard

This standard innovatively adopts the weighted Kp index value (Kw) as the evaluation indicator of weekly geomagnetic activity, and realizes quantitative evaluation through the weighted summation of the Kp index at 56 3-hour intervals. Among them:

Technical details of the grading system

The standard divides weekly geomagnetic activity into 4 levels:

• Quiet level (Kw<1961): corresponds to conventional space weather conditions
• Slight disturbance level (1961≤Kw<3331): may affect high-frequency radio propagation
• Moderate disturbance level (3331≤Kw<6595): causes polar ionospheric scintillation
• Strong disturbance level (Kw≥6595): threatens satellite orbit control and power grid security

Implementation suggestions

Monitoring network construction: It is recommended to add geomagnetic monitoring stations in Hainan and Xinjiang to improve China's regional observation capabilities

Data fusion: It is necessary to conduct multi-dimensional correlation analysis of the Kp index with the Ap index and the Dst index

Warning threshold: It is recommended that the power system activate the protection plan at the medium disturbance level, and the aerospace department adjust the on-orbit attitude at the strong disturbance level