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

1995-1996年的工作是：1)研究磁层导管的位置和尺寸分布；2)大大改进目前对闪电、合唱和其他相干波产生的甚低频波造成的辐射带电子损失率的估计；3)阐明导管和非导管哨声模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SEEP(高能粒子受激发射)卫星以及地面和卫星甚低频波接收器获得的降水电子记录为基础。导管哨声和其他甚低频波的电子沉淀被认为是辐射带电子的主要损失机制。然而，口哨者、口哨者、合唱团和嘘声的相对重要性是有争议的。SEEP卫星具有低空轨道、大几何因数探测器和高数据采集率，因此获得了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甚低频波数据将被用来将波特征与粒子降水联系起来。这项工作将增进对磁层管道尺寸的了解，将提供关于闪电引起的电子沉淀的精细结构和管道哨声所沉淀的电子数量的定量信息，应提供关于非管道哨声和其他甚低频辐射造成的沉降率的信息。对高分辨率电子数据的分析还应限制高纬度电子沉淀爆发的可能机制。

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.