Initial Results from the ISEE-1 and-2 Plasma Wave [Article published in the Special issues: Advances in Magnetospheric Physics with GEOS- 1 and ISEE - 1 and 2. (Proceedings of the 13th ESLAB Symposium, innsbruck, 1978. - pp. 3-133)]
Initial Results from the ISEE-1 and-2 Plasma Wave [Article published in the Special issues: Advances in Magnetospheric Physics with GEOS- 1 and ISEE - 1 and 2. (Proceedings of the 13th ESLAB Symposium, innsbruck, 1978. - pp. 3-133)]
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ISEE-1 和 ISEE-2 等离子体波的初步结果 [文章发表于特刊：GEOS-1 和 ISEE - 1 和 2 的磁层物理进展。（第 13 届 ESLAB 研讨会论文集，因斯布鲁克，1978 年。 - 第 177 页）
DOI：
10.1007/bf00174114
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
E. Smith
中科院分区：
文献类型：
--
作者：
D. Gurnett;R. R. Anderson;F. Scarf;R. W. Fredricks;E. Smith
在本文中，我们提出了一个初步调查的结果，从等离子体波实验的ISEE-1和-2航天器是在几乎相同的轨道通过地球的磁层在径向距离约为22.5 Re。基本上，地球弓形激波的每一次穿越都可能与激波处的静电和哨声模式湍流的强烈爆发有关，上游和下游区域都有大量的波强度。通常，两个航天器在激波处的电场和磁场谱是非常相似的，尽管有时在激波的上游和下游的详细结构上会出现微小的差异，这可能是由于激波运动或传播效应的变化。在冲击波的上游，经常可以观察到电子等离子体频率的基波f-p和二次谐波2fp-。在磁层中，电场的高分辨率频谱图显示了等离子体和无线电发射的极其复杂的分布，具有许多共振和截止效应。电子密度分布可以从接近局部电子等离子体频率的发射获得。两个航天器探测到的哨声模式发射（如合唱）的高分辨率光谱图的比较通常显示出良好的总体相似性，但在不到一分钟的时间尺度上的详细结构存在显着差异。其他类型的局部产生的波，如（n+1/2）f-g电子回旋波，显示出两个航天器之间更好的对应关系。高分辨率频谱的公里无线电发射也提出了一个非常复杂的频率-时间结构与许多紧密间隔的窄带发射。
In this paper we present an initial survey of results from the plasma wave experiments on the ISEE-1 and -2 spacecraft which are in nearly identical orbits passing through the Earth's magnetosphere at radial distances out to about 22.5Re. Essentially every crossing of the Earth's bow shock can be associated with an intense burst of electrostatic and whistler-mode turbulence at the shock, with substantial wave intensities in both the upstream and downstream regions. Usually the electric and magnetic field spectrum at the shock are quite similar for both spacecraft, although small differences in the detailed structure are sometimes apparent upstream and downstream of the shock, probably due to changes in the motion of the shock or propagation effects. Upstream of the shock emissions are often observed at both the fundamental,f-p, and second harmonic, 2fp-, of the electron plasma frequency. In the magnetosphere high resolution spectrograms of the electric field show an extremely complex distribution of plasma and radio emissions, with numerous resonance and cutoff effects. Electron density profiles can be obtained from emissions near the local electron plasma frequency. Comparisons of high resolution spectrograms of whistler-mode emissions such as chorus detected by the two spacecraft usually show a good overall similarity but marked differences in detailed structure on time scales less than one minute. Other types of locally generated waves, such as the (n+1/2)f-gelectron cyclotron waves, show a better correspondence between the two spacecraft. High resolution spectrograms of kilometric radio emissions are also presented which show an extremely complex frequency-time structure with many closely spaced narrow-band emissions.