Banded electrostatic emissions observed by the CRRES plasma wave experiment
Banded electrostatic emissions observed by the CRRES plasma wave experiment
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DOI：
10.1029/92ja01137
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发表时间：
1992-09
影响因子：
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通讯作者：
C. Paranicas;W. Hughes;H. Singer;R. R. Anderson-R.
中科院分区：
文献类型：
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作者：
C. Paranicas;W. Hughes;H. Singer;R. R. Anderson-R.
本文介绍了在最近发射的“CRRES”航天器上进行的等离子体波实验所观测到的带状静电辐射的概况，着重讨论了最高强度波的频率与局部电子回旋频率的倍数之间的关系。由于其目标之一是首次查看CRRES高频电场数据，因此本文中讨论的所有数据都是在发射后的前8个月内获得的。在这段时间内，主要在L=3.5和L=7之间的磁层午夜后象限检测到发射。我们确认，高强度的排放被限制在磁赤道的几度之内。这里提出的排放量都低于电子等离子体频率测量，我们发现他们一般有利于陀螺谐波间隔的上部。当在同一轨道上的赤道附近和远离赤道的地方都探测到ECH发射时，一般来说，在两个位置都激发出相对频率相同的宽带发射。不同的是，在赤道附近，一些频率通道测量到的强度要高得多。当我们与一个对流增长模型比较时，我们发现观测到的谱可能与预测的谱不一致。
A survey of banded electrostatic emissions observed by the Plasma Wave Experiment on the recently launched spacecraft “CRRES” is presented with an emphasis on the relation of the frequency of the highest intensity waves to multiples of the local electron cyclotron frequency. Because one of its goals is a first look at the CRRES high-frequency electric field data, all the data discussed in this paper were taken in the first 8 months after launch. During this time, emissions are detected chiefly in the postmidnight quadrant of the magnetosphere between L=3.5 and L=7. We confirm that high-intensity emissions are confined to within a few degrees of the magnetic equator. The emissions presented here are all measured below the electron plasma frequency, and we find they generally favor the upper part of the gyroharmonic interval. When ECH emissions are detected both near and far from the equator on the same orbit, it is generally true that a broad band of the same relative frequency emissions are excited in both locations. The difference is that near the equator, a few frequency channels measure much higher intensities. When we compare with one model for convective growth, we find that the observed spectra may not be consistent with predicted ones.