Leveraging Geodetic GPS Receivers for Ionospheric Scintillation Science
Leveraging Geodetic GPS Receivers for Ionospheric Scintillation Science
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DOI：
10.1029/2020rs007131
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发表时间：
2020-11-01
期刊：
影响因子：
1.6
通讯作者：
Groves, Keith
中科院分区：
文献类型：
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作者：
Mrak, Sebastijan;Semeter, Joshua;Groves, Keith
我们演示了闪烁分析从一个网络的大地测量全球定位系统（GPS）接收器，提供数据在1秒的分辨率。我们引入代理相位（西格玛（TEC））和振幅（SNR 4）闪烁指数，并验证它们对TEC指数（ROTI）和S-4的变化率。此外，我们验证闪烁观测对连接自主空间环境传感器闪烁接收器。我们开发接收器相关的闪烁事件阈值使用硬件相关的噪声方差。我们分析了2017年9月7日至8日地磁风暴附近的6天，使用了169个接收器，覆盖了美国经度扇区15度至65度之间的磁纬度。我们利用现有的空间采样覆盖率来构建2-D闪烁图，并呈现风暴期间闪烁增强的情节演变。我们发现，低纬度和高纬度的闪烁形态匹配完善的闪烁气候模式。在中纬度地区，闪烁的时空演变部分同意与已知的闪烁模式。此外，研究结果还揭示了以前没有记录的中纬度地区的翻耕生产结构。这些结果提供了一个前所未有的观点到闪烁产生等离子体的不规则性的时空发展，并提供了一个资源，以进一步利用闪烁演变在大空间尺度。
We demonstrate scintillation analysis from a network of geodetic Global Positioning System (GPS) receivers which provide data at 1-second resolution. We introduce proxy phase (sigma(TEC)) and amplitude (SNR4) scintillation indices and validate them against the rate of change of TEC index (ROTI) and S-4. Additionally, we validate scintillation observations against a Connected Autonomous Space Environment Sensor scintillation receiver. We develop receiver-dependent scintillation event thresholding using hardware-dependent noise variance. We analyze 6 days adjacent to the 7-8 September 2017 geomagnetic storm, using 169 receivers covering magnetic latitudes between 15 degrees and 65 degrees in the American longitude sector. We leverage the available spatial sampling coverage to construct 2-D maps of scintillation and present episodic evolution of scintillation intensifications during the storm. We show that low-latitude and high-latitude scintillation morphology match well-established scintillation climatology patterns. At midlatitudes, spatiotemporal evolution of scintillation partially agrees with known scintillation patterns. Additionally, the results reveal previously undocumented midlatitude scintillation-producing structures. The results provide an unprecedented view into the spatiotemporal development of scintillation-producing plasma irregularities and provide a resource to further exploit scintillation evolution at large spatial scales.