Large HF bearing errors for propagation paths contained within the polar cap
Large HF bearing errors for propagation paths contained within the polar cap
复制标题
极帽内传播路径的高频方位误差较大
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
T. Jones
中科院分区：
文献类型：
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作者：
E. M. Warrington;N. Rogers;T. Jones
极冠电离层中的大电子密度梯度，与高密度等离子体斑块的对流和高纬度极光弧的存在有关，产生倾斜的反射表面，导致HF信号在远离大圆的路径上传播。在极高纬度的一个接收地点对极盖内路径上传播的信号进行了测量。记录了接收信号方位与大圆路径之间最多±100°的系统性摆动，其特征与行星际磁场的方向分量和地磁活动水平有关，因为这些地磁参数在确定高纬度电离层状态方面发挥着重要作用。
Large electron-density gradients in the polar-cap ionosphere, associated with the convection of patches of overdense plasma and the presence of high-latitude auroral arcs, produce tilted reflecting surfaces which result in HF signals propagating over paths well displaced from the great circle. Measurements have been made at a very high-latitude receiving site of signals propagated over paths contained within the polar cap. Systematic swings in the bearing of the received signal of up to ±100° from the great circle path were recorded and their characteristics related to the directional components of the interplanetary magnetic field and the level of geomagnetic activity, as these geomagnetic parameters play an important role in determining the state of the high-latitude ionosphere.