A Forecasting Ionospheric Real‐time Scintillation Tool (FIRST)
A Forecasting Ionospheric Real‐time Scintillation Tool (FIRST)
复制标题
预测电离层实时闪烁工具（FIRST）
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Bullett
中科院分区：
文献类型：
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作者：
R. Redmon;D. Anderson;R. Caton;T. Bullett
穿越电离层的无线电波在不规则的电离层中传播时，由于等离子体的耗尽或“气泡”，会受到不规则的增强和衰减，通常称为闪烁。对当前电离层状况的了解使系统运营商能够区分无线电环境造成的损害和系统引起的故障，而对同样情况的预测为运营商提供了采取适当行动以减轻影响和优化服务的机会。本文介绍了一种技术，使用容易获得的电离层特性h′F从地面电离层探测器数据的地磁赤道附近，以预测发生或不发生的低纬度闪烁活动在VHF/UHF波段。我们说明了预测电离层真实的-时间闪烁工具的发展及其预测闪烁活动的真实的-时间能力。最后，我们发现在1930 LT的h′F值中存在一个阈值，对应于秘鲁经度扇区闪烁活动的开始，发现该阈值以线性方式随着F10.7 cm通量的减小而减小。
Transionospheric radio waves propagating through an irregular ionosphere with plasma depletions, or “bubbles,” are subject to sporadic enhancement and fading commonly referred to as scintillation. Knowledge of the current ionospheric condition allows system operators to distinguish between compromises due to the radio environment and system induced failures, while a forecast of the same provides the opportunity for operators to take appropriate actions to mitigate the effects and optimize service. This paper describes a technique that uses the readily accessible ionospheric characteristic h′F from ground‐based ionospheric sounder data near the geomagnetic equator to forecast the occurrence or nonoccurrence of low‐latitude scintillation activity in VHF/UHF bands. We illustrate the development of the Forecasting Ionospheric Real‐time Scintillation Tool and its real‐time capability for forecasting scintillation activity. Finally, we have found that there exists a threshold in the h′F value at 1930 LT that corresponds to the onset of scintillation activity in the Peruvian longitude sector, which is found to decrease with decreasing F10.7 cm fluxes in a linear manner.