Magnetospheric States and State Transitions

我们的建议是研究DMSP卫星数据库在一系列磁层状态转变期间的粒子降水。状态转换将包括磁层对IMF By和Bz分量变化的响应、对亚暴发生的前兆和响应，以及通量管重新填充的状态。这些状态变化将使用DMSP粒子数据确定的状态变量进行研究。这些状态变量包括离子各向同性边界和极帽边界，由此可以估计极帽面积。该数据库包括超过356,000个夜间过境点，将根据亚风暴阶段进行统计调查。

The proposal is to investigate the DMSP satellite database of particle precipitation during a series of magnetospheric state transitions. State transitions will include the magnetospheric response to changes in IMF By and Bz components, precursors and responses to substorm onset, and states of flux tube refilling. These state changes will be investigated using state variables determines from DMSP particle data. Such state variables include the ion isotropy boundary and polar cap boundary - from which can be estimated the polar cap area. The database includes over 356,000 nightside crossings which will be investigated statistically, sorted according to substorm phase.