GB/T 41206-2021 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

Scope

This document describes the effective vertical geomagnetic cutoff rigidity of charged particles in near-Earth space and sets out the main requirements for its calculation. In Appendix A, a typical example is used to verify the calculation method.
This document is applicable to the development of geomagnetic cutoff rigidity calculation models based on different geomagnetic field models [1]. Geomagnetic cutoff rigidity calculation models are used to determine the charged particle flux entering the Earth's magnetosphere and to test and estimate its impact on spacecraft and other equipment.
This document is suitable for calculating the geomagnetic field transport of charged particles (galactic cosmic rays, solar cosmic rays, and anomalous cosmic rays) with rigidity greater than 0.2 GV in any component. The main objectives of standardizing the effective vertical geomagnetic cutoff rigidity are as follows:
——Provide a clear procedure for calculating the geomagnetic cutoff rigidity within the Earth's magnetosphere, reflecting geomagnetic disturbances and local time dependencies;
——Provide a means of estimating the charged particle flux for space experiment tasks, in order to interpret and analyze the effects of charged particles;
——Provide a method for effectively calculating the geomagnetic field transport function in low-altitude spacecraft orbits;
——Use independent on-orbit interplanetary particle flux data to determine the impact of solar energetic particles on spacecraft equipment and astronauts.

Development Information

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