Spacecraft-environment interaction modelling.

在过去几十年中，世界上部署监测和科学卫星的数量急剧增加。我们各国社会的福祉和安全越来越依赖空间科学和技术。加拿大是世界上第三个航天国家，在许多空间探索领域仍然处于领先地位。然而，空间环境恶劣，空间天气可能对卫星及其部件造成严重后果。其中一些影响包括：一）热或高能粒子通量和太阳辐射引起的充电，二）与大的表面或内部电场有关的电弧放电和内部放电，三）关键部件上的热负荷和四）辐射和粒子轰击引起的材料性能老化和改变，即使在正常条件下，卫星的存在也会引起空间环境的扰动，这反过来又会导致某些测量中的偏差。因此，很明显，空间使命规划和最佳解释的空间载仪器必须依赖于一个坚实的理解卫星和空间环境之间的相互作用。在这个建议中，我描述了计划进一步开发和使用先进的计算机模型来研究人造卫星和空间环境之间的相互作用。这项工作建立在等离子体物理学、计算方法和空间物理学领域多年经验的基础上。这项研究将应用于Swarm和e-POP等飞行任务，加拿大在这些任务中作出了重大贡献。它还将与其他小组合作，用于研究国际飞行任务。这将确定我们小组的专门知识和专门技能，并加强加拿大作为空间科学和技术领导者的地位。

The last several decades have seen a dramatic increase in the deployment of monitoring and science satellites in the world. Our societies depend increasingly on space science and technology for their well being and security. Canada was the third space faring nation in the world, and it remains a leader in many areas of space exploration. Space environment, however, is inhospitable and space weather can have severe consequences on satellites and their components. Some of the effects at play include:i) charging caused by thermal or energetic particle fluxes, and solar radiation, ii) arcing and internal discharges associated with large surface or internal electric fields, iii) heat loads on critical components and iv) aging and modification of material properties, caused by radiation and particle bombardment.Even under normal conditions, the presence of a satellite causes perturbations in the space environment which in turn can lead to aberrations in certain measurements. It is clear, therefore, that space mission planning and optimal interpretation of space borne instruments must rely on a solid understanding of the interaction between satellites and space environment.In this proposal I describe plans to further develop and a use advanced computer models to study the interaction between artificial satellites and space environment. This work builds on many years of experience in the fields of plasma physics, computational methods and space physics. The research will be applied to missions such as Swarm and e-POP in which Canada has a significant contribution. It will also be used, in collaboration with other teams to study international missions. This will ascertain our group's expertise and know-how, and strengthen Canada's position as a leader in space science and technology.