Determination of the Location and Size of Whistler-Electron Correlated Energetic Electron and Whistler Data

1995-1996年期间的工作是：1)研究磁层管道的位置和大小分布；2)大大改进目前对由闪电、合唱和其他相干波产生的VLF波引起的辐射带电子损失率的估计；3)阐明导管和非导管哨声模式波在辐射带粒子扩散和降水中的相对作用；4)研究高纬度降水爆发的机制。这项研究将以1982年由SEEP（高能粒子受激发射）卫星和地面和卫星上的VLF波接收器获得的沉淀电子记录为基础。通过导管哨子和其他VLF波的电子沉淀被认为是辐射带电子的主要损失机制。然而，导管式口哨、非导管式口哨、合唱和嘶嘶声的相对重要性是有争议的。SEEP卫星具有低空轨道、大型几何因子探测器和高数据收集率，已获得可用于解决这些问题的独特数据集。此外，在SEEP运行期间，从地面站和卫星获得的VLF波数据将用于将波特征与颗粒降水联系起来。这项工作将提高对磁层管道尺寸的认识，将提供有关雷击诱导电子沉淀的精细结构和由导管哨子沉淀的电子数量的定量信息，并应提供有关非导管哨子和其他VLF发射引起的沉淀率的信息。对高分辨率电子数据的分析也应该约束高纬度电子降水爆发的可能机制。

The proposed effort during 1995-1996 is to 1) study the locations and size distribution of magnetospheric ducts, 2) greatly improve current estimates of loss rates of radiation belt electrons due to VLF waves from lightning, chorus, and other coherent waves, 3) clarify the relative roles of ducted and non-ducted whistler mode waves in the diffusion and precipitation of radiation belt particles, and 4) study the mechanisms responsible for high latitude precipitation bursts. This study will be based on precipitating electron records acquired in 1982 by the SEEP (Stimulated Emission of Energetic Particles) satellite and by VLF wave receivers on the ground and on satellites. Electron precipitation by ducted whistlers and by other VLF waves is thought to be the major loss mechanism for radiation belt electrons. However, the relative importance of ducted whistlers, unducted whistlers, chorus, and hiss is controversial. The SEEP satellite with its low altitude orbit, large geometric factor detectors, and high data collection rates has acquired an unique data set which can be used to address these issues. In addition, VLF wave data from ground stations and satellites were obtained during the time interval SEEP was operating and will be used to associate wave characteristics with the particle precipitation. This work will improve knowledge of magnetospheric duct dimensions, will provide quantitative information on the fine structure of lightning-induced electron precipitation and on the number of electrons precipited by ducted whistlers, should give information on the precipitation rates caused by non-ducted whistlers and other VLF emissions. Analysis of the high resolution electron data should also constrain the possible mechanisms responsible of the high latitude electron precipitation bursts.