GB/T 41457-2022Space environment - Solar proton fluences at GEO and guideline for selection of confidence level in statistical model of solar proton fluencies (English PDF)
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
April 15, 2022
Implementation date
November 1, 2022
Scope
GB/T 41457-2022 (Space environment - Solar proton fluences at GEO and guideline for selection of confidence level in statistical model of solar proton fluencies) is available as an English-translated PDF.
GB/T 41457-2022 is the Chinese standard "Space environment - Solar proton fluences at GEO and guideline for selection of confidence level in statistical model of solar proton fluencies".
Its scope clause reads: This document presents the method and options for estimating the long-term (solar activity cycle greater than 11 years) fluence of solar protons in geosynchronous orbit (GEO).
Guidelines for choosing confidence levels for solar proton fluence models. This document applies to performance degradation estimates of solar cells. Charge coupled device (CCD), image sensor (APS) and other optoelectronic devices The performance degradation estimation is used for reference. Its clauses include terms and definitions.
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Document preview — GB/T 41457-2022
National Standard of the People's Republic of China
- Classification
- V 06
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Abbreviations
- 5 Method Principle
- 5.1 Cumulative fluence
- 5.2 Confidence
- 5.3 High-energy proton data observed in GEO orbits
- 5.4 Other Notes
- 6 Confidence selection guide for statistical models of solar proton fluence
- Appendix A (informative) Technical differences between this document and ISO 12208.2015 and their reasons
- Appendix B (Informative) Solar Proton Flux Prediction and Confidence Selection Example
1 Scope
This document presents the method and options for estimating the long-term (solar activity cycle greater than 11 years) fluence of solar protons in geosynchronous orbit (GEO).
Guidelines for choosing confidence levels for solar proton fluence models.
This document applies to performance degradation estimates of solar cells. Charge coupled device (CCD), image sensor (APS) and other optoelectronic devices
The performance degradation estimation is used for reference.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.
GB/T 32452 Spacecraft Space Environment Terminology
3 Terms and Definitions
The terms and definitions defined in GB/T 32452 and the following apply to this document.
3.1 confidence level
Confidence level
The confidence level used for cumulative fluence estimates.
3.2 extremely rare event
The solar energy proton (SEP) event occurs only once in a solar cycle, and the mass in a complete solar cycle
The sub-fluence is mainly derived from this SEP event.
Note. SEP events that occurred in August 1972, October 1989 or July.2000 are extremely rare events.
3.3 flux
The number of particles passing through a specific area per unit time.
3.4 fluence
Time integral of flux.
3.5 n-year fluence
The fluence for the n-year mission period. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.
Referenced standards
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