摘要: 在地球磁层顶附近观测到的通量传输事件（Flux Transfer Event，FTE）一般被认为是瞬态局域磁重联的产物，是太阳风质量、动量和能量进入地球内磁层的重要通道.重构FTE的磁场结构可促进对其形成、演化过程及其与周围等离子体环境相互作用的理解.Grad-Shafranov重构法和磁通量绳拟合法等传统磁场重构方法适用于满足特定物理条件的磁场结构.基于平面线性插值原理，设计了一种不受具体物理条件限定的二维FTE磁场结构重构法.模型测试以及对THEMIS和Cluster卫星簇分别观测到的两个FTE的实际应用表明，在合适的多卫星位形条件下，该方法能快速有效重构出FTE的磁场空间分布，有助于推测FTE的磁场线位形，理解卫星测量数据的时间变化，以及分析等离子体物理量相对于FTE的磁场空间分布特征.
摘要: A light source of multi-star simulator capable of background adjustment and magnitude control has been designed. Two integrating spheres are employed as the star-point light source and the background light source respectively. A beam splitter prism has been designed to serve as the beam combiner for the star-point and the background light sources, and a mathematical model has been constructed respectively to compute the light flux of the two integrating spheres. A magnitude testing system and a background testing system have been created using low-light illuminometer, luminance meter, and testing instruments to measure the star-point magnitude and the background luminance of the multi-star simulator. The test results suggest that the star-point magnitude is adjustable from 0 to +5mv, with a simulation precision superior to ±0.026mv. The maximum background luminance is 3.8×105 cd·m-2, and the minimum background luminance is 6.4×10-2 cd·m-2. The designed light source system can meet the requirements for simulating the stellar map with a sky background.