标题： 日冕物质抛射引起地球大气加热对低地球轨道卫星的等离子体阻力影响 显示英文标题

标题： Effects of Plasma Drag on Low Earth Orbiting Satellites due to Heating of Earth's Atmosphere by Coronal Mass Ejections

摘要： 太阳事件，例如日冕物质抛射（CME）和太阳耀斑，会加热地球高层大气及近地空间环境。 由于太阳释放出的高能紫外、X射线以及粒子导致外层大气受热并膨胀，低地球轨道卫星（LEOS）面临因扩展大气中的离子和分子而增强的阻力。 在各种扰动类型中，朝向地球的日冕物质抛射起到最重要的作用。 它们在太阳约11年的活动周期（太阳极大期）中更为频繁且强烈。 随着我们即将在2013年后期进入另一个太阳极大期，利用空间环境参数档案数据作为指标来分析过去太阳周期对运行卫星的影响可能具有指导意义。 本文中，我们计算了由CME及其他太阳事件引起的高层大气加热对模型LEOS产生的等离子体阻力，并将其作为太阳参数的函数。 利用下一次太阳极大期的时间与强度的当前预测，我们预测现有卫星轨道在未来几年内可能会受到怎样的影响。 显示英文摘要

摘要： Solar events, such as coronal mass ejections (CMEs) and solar flares, heat up the upper atmosphere and near-Earth space environment. Due to this heating and expansion of the outer atmosphere by the energetic ultraviolet, X-ray and particles expelled from the sun, the low Earth-Orbiting satellites (LEOS) become vulnerable to an enhanced drag force by the ions and molecules of the expanded atmosphere. Out of various types of perturbations, Earth directed CMEs play the most significant role. They are more frequent and intense during the active (solar maximum) phase of the sun's approximately 11-year cycle. As we are approaching another solar maximum later in 2013, it may be instructive to analyse the effects of the past solar cycles on the orbiting satellites using the archival data of space environment parameters as indicators. In this paper, we compute the plasma drag on a model LEOS due to the atmospheric heating by CMEs and other solar events as a function of the solar parameters. Using the current forecast on the time and strength of the next solar maximum, we predict how an existing satellite orbit may be affected in the forthcoming years.