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Effect of Magnetic activity on scintillation at Equatorial Region during Low Solar Activity

机译：低太阳活动期间磁活动对赤道区闪烁的影响

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摘要

Single and dual frequency GPS receivers used in low-latitude regions can suffer from rapid amplitude and phase fluctuations known as scintillation. Intense signal fluctuations cause GPS receivers to stop tracking the signals from GPS satellites in a process sometimes called “loss of lock”. This may increase navigation errors or, in some cases, cause navigation failure. Data recorded from ground-based GPS scintillation monitors (GSV 4004A GPS receiver) installed at the Space Science Laboratory, Department of Physics, Barkatullah University, Bhopal (23.2oN, 77.4oE; Geomagnetic 14.2oN) are used. Different phases of geomagnetic storms affect the generation and development of ionospheric irregularities differently. Results shows that occurrence of scintillation observed during summer months are relatively weak as compared to those recorded during winter and equinox months. The enhancement in magnetic activity leads to a suppression of pre-midnight scintillations during the equinox and during the winter, whereas as enhancement is observed in summer months. The generation or inhibition of irregularities during the main phase/recovery phase of a magnetic storm depends upon the location of the station and local time.
机译：在低纬度地区使用的单频和双频GPS接收器可能会遭受称为闪烁的急剧幅度和相位波动。剧烈的信号波动会导致GPS接收器在有时称为“失锁”的过程中停止跟踪GPS卫星的信号。这可能会增加导航错误，或者在某些情况下会导致导航失败。使用从安装在博帕尔巴尔卡图拉大学物理系空间科学实验室的地面GPS闪烁监测仪（GSV 4004A GPS接收器）记录的数据（23.2oN，77.4oE;地磁14.2oN）。地磁风暴的不同阶段对电离层不规则性的产生和发展有不同的影响。结果显示，与冬季和春分月份记录的相比，在夏季观察到的闪烁发生相对较弱。在昼夜平分点和冬季，磁活动的增强导致午夜前闪烁的抑制，而在夏季，则观察到增强。磁暴的主要阶段/恢复阶段不规则性的产生或抑制取决于站点的位置和当地时间。

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