GPS total electron content variations associated with a polar cap arc
GPS total electron content variations associated with a polar cap arc
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DOI：
10.1029/2009ja014916
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发表时间：
2009-12
影响因子：
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通讯作者：
P. Jayachandran;K. Hosokawa;J. MacDougall;S. Mushini;R. Langley;K. Shiokawa
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文献类型：
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作者：
P. Jayachandran;K. Hosokawa;J. MacDougall;S. Mushini;R. Langley;K. Shiokawa
[1] 我们报告了一个使用全球定位系统 (GPS) 测量的总电子含量 (TEC) 变化的示例，该变化与极帽站的全天空成像仪和电离探空仪检测到的极帽弧相关。在弧经过期间，沿弧长的 GPS 信号显示出~2 TEC 单位的增加，而垂直于弧的 GPS 信号仅显示~0.3 TEC 单位的增加。这表明与极帽弧相关的 GPS TEC 变化取决于相对于弧的 GPS 射线路径的几何形状。电离探空仪测量证实，该弧是~110 km处的E区特征，峰值电子密度为5.4 × 1011 el/m3。使用 GPS 三角测量方法估计电弧速度约为 300 m/s。
[1] We report an example of total electron content (TEC) variations, using Global Positioning System (GPS) measurements, associated with a polar cap arc detected by an all-sky imager and ionosonde at a polar cap station. During the transit of the arc, GPS signals along the arc length showed an increase of ∼2 TEC units whereas GPS signals perpendicular to the arc showed only an increase of ∼0.3 TEC units. This indicates that the GPS TEC variations associated with a polar cap arc are dependent on the geometry of the GPS raypaths with respect to the arc. Ionosonde measurements confirm that this arc was an E region feature at ∼110 km with peak electron density of 5.4 × 1011 el/m3. Estimated speed of the arc using a GPS triangulation method was about 300 m/s.