Magnetospheric Boundary Identification from Energetic Particle Measurements on Polar-Orbiting Satellites

极轨卫星高能粒子测量的磁层边界识别

• 批准号: 9120072
• 负责人: Lawrence Lyons
• 金额: $ 14.49万
• 依托单位: Aerospace Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-10-01 至 1995-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9120072&HistoricalAwards=false
• 关键词: Magnetospheric; Boundary; Identification; Energetic; Particle

We have determined that two important magnetospheric boundary regions on the side, the low-latitude boundary layer (LLBL) and the cusp, can be identified from energetic particle observations as well as from observations of magnetosheath-energy particle precipitation on polar-orbiting satellites. We propose to analyze simultaneous observations of magnetosheath energy particles obtained from the S3-3 satellite in order to identify these boundary regions, to analyze processes occurring within these boundary regions, and to investigate the mapping of these regions from the magnetosphere to the ionosphere. We will compare the identification obtined using the criteria developed be Newell and Meng ı1988! for magnetosheath-energy particles. In this way, we will investigate the accuracy of both techniques as well as determine the advantages of using energetic particle measurements to supplement and verify the identification obtainable using the Newell and Meng criteria. In addition, using the measured angular distributions of particles, we will investigate the extent to which the LLBL lies on closed field lines and estimate the locations of auroral acceleration regions relative to each of the magnetospheric boundary regions and to the open-closed field line boundary. We also propose to determine criteria for distinguishing between precipitation from the LLBL and that from the plasma sheet boundary layer. We will use the criteria to study the important transition between these two boundary layers as mapped to the ionosphere. Using the electric and magnetic field data from S3-3, we plan to study the spatial relations between the convection reversal, field-ligned currents, the different boundary regions, and the open-closed field line boundary. In this way, we hope to gain significant information on the extent to which the magnetospheric electric field is generated by reconnection versus viscous interaction and on the generation regions for day side field-aligned currents. Finally, using precipitation data from the identically instrumented, almost co-orbiting, DMSP F6 and F8 satellites, we will pursue the separation of temporal and spatial effects over latitudinal scale sizes as small as 10km within the day side boundary layers.

我们已经确定两个重要的磁层边界 低纬度边界层（LLBL）和 尖点，可以从高能粒子观测中识别出来 以及对磁鞘能量粒子的观测 极地轨道卫星上的降水量 我们建议 分析磁鞘能量的同时观测 从S3-3卫星获得的粒子，以确定 这些边界区域，以分析发生在 这些边界区域，并研究这些映射 从磁层到电离层。 我们将 使用制定的标准比较识别对象 成为纽韦尔和孟伊1988！磁鞘能量粒子 在 这样，我们将调查这两种技术的准确性， 以及确定使用高能粒子的优势 补充和验证标识的测量 可使用纽韦尔和孟准则获得。 此外，本发明还提供了一种方法， 利用测得的粒子角分布，我们将 调查LLBL位于封闭场的程度 并估计极光加速区的位置 相对于每个磁层边界区域， 开闭磁力线边界。 我们亦建议 确定区分降水和 LLBL和来自等离子体片边界层的LLBL。 我们将 使用标准来研究这些之间的重要过渡 两个边界层映射到电离层。 使用 S3-3的电磁场数据，我们计划研究 对流逆转、场照明、 电流，不同的边界区域，以及开-闭 场线边界 通过这种方式，我们希望获得重大的 关于磁层电活动在多大程度上 场是由重连与粘性相互作用产生的， 在日侧场向电流的产生区域上。 最后，利用降水资料，从相同的 DMSP F6和F8卫星装有仪器，几乎共轨，我们 将追求时间和空间效果的分离， 纬向尺度小至10 km以内的昼侧 边界层