Extreme Ultraviolet Imager Observations of the Structure and Dynamics of the Plasmasphere
Extreme Ultraviolet Imager Observations of the Structure and Dynamics of the Plasmasphere
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DOI：
10.1023/b:spac.0000007511.47727.5b
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发表时间：
2003-10
影响因子：
10.3
通讯作者：
B. Sandel;J. Goldstein;D. Gallagher;M. Spasojević
中科院分区：
文献类型：
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作者：
B. Sandel;J. Goldstein;D. Gallagher;M. Spasojević
IMAGE极紫外成像仪（EUV）通过对He+在其30.4 nm共振线中的分布进行成像，提供了我们的第一个等离子体光谱的全球图像。这些图像揭示了一个高度结构化和动态实体的细节。比较EUV图像和选定的原位观测有助于验证遥感测量。EUV图像中的亮度在磁赤道平面附近受到He+密度的严重影响，但有两条证据强调EUV所看到的特征远离赤道，并且至少在某些情况下到达电离层。某些特征和行为，包括肩部、通道、缺口和等离子体侵蚀事件，经常出现在EUV图像中。这是理解内磁层电场对等离子体大、中尺度分布影响的关键，对它们的研究可以阐明太阳风和行星际磁场与内磁层耦合的机制。
The IMAGE Extreme Ultraviolet Imager (EUV) provides our first global images of the plasmasphere by imaging the distribution of He+in its 30.4-nm resonance line. The images reveal the details of a highly structured and dynamic entity. Comparing EUV images and selectedin-situobservations has helped to validate the remote sensing measurements. The brightness in the EUV images is heavily weighted by the He+density near the plane of the magnetic equator, but two lines of evidence emphasize that the features seen by EUV extend far from the equator, and in at least some cases reach the ionosphere. Certain features and behaviors, including shoulders, channels, notches, and plasma erosion events, appear frequently in the EUV images. These are keys to understanding the ways that electric fields in the inner magnetosphere affect the large and meso-scale distribution of plasma, and their study can elucidate the mechanisms by which the solar wind and interplanetary magnetic field couple to the inner magnetosphere.