GB/T 41206-2021 in English
VALIDSpace environment (natural and artificial)—Cosmic ray and solar energetic particle penetration inward the magnetosphere—Method of determination of the effective vertical cut-off rigidity
- Issued on:2021-12-31
- Implemented on:2022-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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| Standard No: | GB/T 41206-2021 |
| Document status: | VALID |
| Title in English: | Space environment (natural and artificial)—Cosmic ray and solar energetic particle penetration inward the magnetosphere—Method of determination of the effective vertical cut-off rigidity |
| Title in Chinese: | 空间环境（自然和人工） 宇宙线和太阳能量粒子穿入磁层 有效垂直地磁截止刚度的确定方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2021-12-31 |
| Implemented on: | 2022-07-01 |
| ICS Classification: | 49.140-Space systems and operations |
| Chinese Classification: | V04-Basic standards and general methods |
| Professional Classification: | GB-National Standard |
| Related Keywords: | effective vertical cut-off rigidity introduction analysis
magnetosphere method space environment solar energetic particle penetration spacecraft radiation environment |
| Related Topics: | artificial particle
magnetosphere GB/T 41206 GB/T 41206-2021 The observation methods of straight lines in space include |
《GB/T 41206-2021空间环境（自然和人工） 宇宙线和太阳能量粒子穿入磁层 有效垂直地磁截止刚度的确定方法》由TC425（全国宇航技术及其应用标准化技术委员会）归口，TC425SC1（全国宇航技术及其应用标准化技术委员会空间环境分会）执行，主管部门为中国科学院。
Introduction
Analysis of the core content of the standard
This document establishes a method for determining the critical energy threshold of charged particles penetrating the Earth's magnetosphere, focusing on:
- Stiffness calculation based on the IGRF and Tsyganenko magnetic field models
- Dynamic correction of magnetospheric disturbances (Kp index) and local time
- Assessment of spacecraft radiation environment in the altitude range of 250-20000km
Comparison of key technical parameters
| Parameter | Definition | Typical value range | Influencing factor |
|---|---|---|---|
| Effective vertical cutoff stiffness | Minimum magnetic stiffness for particles to penetrate the magnetosphere | 0.2-14GV | Latitude/altitude/Kp index |
| Penumbra width | RU-RL difference | 0.1-3GV | Magnespheric current system |
| Attenuation coefficient Δ | Correction factor of external magnetic field | 0.7-1.3 | Local time/Kp index |
Implementation and application cases
Example: Calculate the cutoff stiffness for an orbit altitude of 500 km (λ=30°,φ=120°) under the condition of Kp=4:
- Interpolate from the IGRF basic table to obtain R0=6.23GV
- Apply the height correction formula: R0H=6.23×(6371.2+450)2/(6371.2+500)2
- The final value Reff=5.73GV is obtained by Δ(R0,Kp=4,T=12h)=0.92
Standard Evolution Analysis
Compared with ISO 17520:2016, GB/T 41206-2021 Main enhancements:
- New chapter on normative references
- Clearly updated geomagnetic field model using IGRF-2010, etc.
- Extended altitude applicability to suborbital spacecraft
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