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Standard
ISO 17520
Second edition
Space environment (natural and
2024-03
artificial) — Cosmic ray and solar
energetic particle penetration
inward the magnetosphere —
Method of determination of the
effective vertical cut-off rigidity
Systèmes spatiaux (naturel et artificiel) — Rayons cosmiques
et pénétration de particule énergétique solaire dans la
magnétosphère — Méthode de détermination de la rigidité de
coupure verticale effective
Reference number
ISO 17520:2024(en) © ISO 2024
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ISO 17520:2024(en)
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© ISO 2024
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 17520:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General concepts and assumptions . 3
4.1 Determination of effective vertical cut-off rigidity .3
4.2 Models of the employed geomagnetic field .4
4.3 Effective vertical cut-off rigidity databases (libraries) .4
4.4 Method for effective vertical cut-off data generalization . .4
5 Model requirements . 4
5.1 General .4
5.2 Parameterization.4
Annex A (informative) Effective vertical cut-off determination procedure . 5
Annex B (informative) Method for effective vertical cut-off data generalization for different
conditions . 6
Bibliography . 14
© ISO 2024 – All rights reserved
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ISO 17520:2024(en)
Foreword
ISO (the International Organization for Standardiz
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