Highly Periodic Solar Wind Density Structures: Characteristics and Magnetosphere Coupling

PI提议对太阳风周期结构进行彻底的五部分调查。他计划：(1)确定周期结构的出现频率，并确定它们在整个日球层结构中的位置；(2)探索结构在特定尺度尺度上优先发生的可能性，而不是离散频率，并分析这些对流结构相对于电流片、冲击、流界面等的空间结构；(3)利用事件研究和MHD模拟相结合的方法研究磁层对外部周期性强迫的响应，主要目标是确定日侧磁层顶Q值；(4)研究周期密度结构的压力平衡，以确定它们在哪个时间尺度上是稳定的，并利用L1和地球上游的多点测量来探索这种结构的演化；(5)探索在冲击和不连续面下游区域观测到的周期性密度结构的结构和演化。

The PI proposes a thorough, five-part investigation of solar wind periodic structures. He plans to (1) determine the occurrence frequency of the periodic structures, and determine where in the overall heliospheric structure they are observed; (2) explore the possibility that the structures occur preferentially at certain scale-sizes, as opposed to discrete frequencies, and analyze the spatial structure of these convected structures relative to current sheets, shocks, stream interfaces, etc.; (3) study the magnetospheric response to external, periodic forcing using a combination of event studies and MHD simulations, with a primary goal the determination of the dayside magnetopause Q value; (4) examine the pressure balance of the periodic density structures to determine over which timescales they are stable, and use multi-point measurements from L1 and just upstream of the Earth to explore the evolution of such structures; and (5) explore the structure and evolution of periodic density structures that are observed in the downstream regions of shocks and discontinuities.