A Geosynchronous Perspective on Solar Wind-Magnetosphere Interaction

太阳风-磁层相互作用的地球同步视角

基本信息

批准号：
9510303
负责人：
David Sibeck
金额：
$ 23.09万
依托单位：
Johns Hopkins University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-08-01 至 1998-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510303&HistoricalAwards=false
关键词：
Geosynchronous Perspective Solar Wind Magnetosphere

项目摘要

A 5-year program is outlined to use GOES-5, -6, and -7 geosynchronous magnetic field observations to determine the characteristics of the solar wind-magnetosphere interaction. A linear prediction filter analysis of the dayside magnetospheric magnetic field strength will determine the time scales and lags associated with the response to variations in the north-south component of the IMF, the IMF cone angle, and the solar wind dynamic pressure. A Fourier decomposition of the geosynchronous magnetic field observations will determine the effects of these solar wind parameters upon the diurnal variation of the magnetospheric magnetic field. We will use the results so obtained to discriminate between several suggested modes for solar wind- magnetosphere interaction and to extend models for the dayside magnetopause to more extreme values of solar wind parameters. We propose a plan to use variations in the east-west component of the magnetospheric magnetic field to distinguish between component and antiparallel modes of dayside merging as a function of solar wind conditions. Finally, we combine solar wind, geosynchronous, and ground observations to study the effects of north/south IMF turnings and solar wind dynamic pressure variations upon low- latitude dayside ground magnetograms in an effort to determine the cause of the enhanced H components seen in low-latitude ground magnetograms during DP2 convection pattern variations.

概述了一个为期5年的计划，用于使用GON-5，-6和-7地球同步磁场观测值来确定太阳风磁层相互作用的特征。对日期磁层磁场强度的线性预测滤波器分析将确定与IMF南北分量，IMF锥角和太阳风力动态压力的响应有关的时间尺度和滞后。地球同步磁场观测值的傅立叶分解将确定这些太阳风参数对磁层磁场的昼夜变化的影响。我们将使用如此获得的结果来区分太阳能磁层相互作用的几种建议的模式，并将日常磁磁性的模型扩展到太阳风参数的更极端值。我们提出了一个计划，以在磁层磁场的东西方分量中使用变化，以区分日期合并的组件和反平行模式，这是太阳风条件的函数。最后，我们结合了太阳风，地球同步和地面观测，以研究北/南部IMF转弯和太阳风动态压力变化对低纬度日地面磁化图的影响，以确定在DP2对话模式变化过程中低纬度地面磁力图中看到的增强的H成分的原因。