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GB/T 46179-2025: Space environment - Meteoroid models
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GB/T 46179-2025: Space environment - Meteoroid models

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ICS 07.040 CCSV06 National Standards of the People's Republic of China Space environment meteoroid model Published on 2025-10-05 Implemented on October 5, 2025 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of Contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Abbreviations 2 5.Meteoroid Environment Model 2 6.Lifetime distribution model of meteoroid impactor spacecraft products 7.Principles and Application Recommendations for Meteoroid Environment Models 6 Appendix A (Informative) Introduction to Meteorite Flux Models 8 Appendix B (Informative) Typical Meteoroid Flows and Their Model Characteristic Parameters 10 Appendix C (Informative) Comparison of Flux Models for Occasional Meteorites 13

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the Chinese Academy of Sciences. This document is under the jurisdiction of the National Technical Committee on Standardization of Aerospace Technology and Its Applications (SAC/TC425). This document was drafted by. Xi'an Satellite Control Center, China; National Space Science Center, Chinese Academy of Sciences; and Beijing Satellite Environmental Engineering Research Institute. Institute, Shenzhen Star-Ground Twin Technology Co., Ltd., Harbin Institute of Technology, National Astronomical Observatories of the Chinese Academy of Sciences, Jiuquan Satellite Launch Center, China Space Aerodynamics Research and Development Center, Beijing Spacecraft Overall Design Department. The main drafters of this document are. Jiang Yu, Zhong Qiuzhen, Jiang Chunsheng, Guo Xiaotao, Shen Zicai, Li Changhong, Li Hengnian, Yu Xueming, An Yuan, and Hou Chongyuan. Wang Shijin, Li Zhihui, Wang Ronglan, Liu Jing, Wu Qiang, Ni Yanshuo, Zhang Gang. Space environment meteoroid model 1.Scope This document provides models, selection methods, and application recommendations for meteoroid environments. This document applies to the calculation of the number of space meteoroids, orbital evolution, and spacecraft in aerospace engineering missions and applications in scientific research and engineering. Collision probability analysis of meteoroids, on-orbit collision avoidance of spacecraft, and meteoroid impact protection design.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 32452 Space Terminology - Space Environment 3.Terms and Definitions The terms and definitions defined in GB/T 32452 and the following terms and definitions apply to this document. 3.1 Impact Flux The number of meteoroids impacting a spacecraft or other space structure per unit time and per unit area. 3.2 mass density The mass of a meteoroid per unit volume. 3.3 Huang Daoguang (zodiacalight) The white light that diffuses along the ecliptic plane, formed by interplanetary dust particles reflecting sunlight. 3.4 meteoroid Small, moving celestial bodies that exist naturally in the solar system and whose diameters are typically between 10 μm and 1 m. 3.5 sporadicmeteoroids occasionally appear Meteoroids that do not belong to any particular meteoroid stream. Note. It may have originated from a variety of different asteroids and comets. 3.6 Meteoroid Stream A group of meteoroids produced by a specific comet and distributed along similar orbits. 3.7 A model describing the meteoroid collision flux and evolution at the orbital location of a space target. ...