Short‐Period Concentric Traveling Ionospheric Disturbances Excited by the Launch of China's Long March 4B Rocket Detected by 1 Hz GNSS Data
Short‐Period Concentric Traveling Ionospheric Disturbances Excited by the Launch of China's Long March 4B Rocket Detected by 1 Hz GNSS Data
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DOI：
10.1029/2021sw003003
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发表时间：
2022-06
期刊：
影响因子：
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通讯作者：
Xiaolin Li;F. Ding;X. Yue;Jianyong Li
中科院分区：
文献类型：
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作者：
Xiaolin Li;F. Ding;X. Yue;Jianyong Li
利用时间分辨率为1 s的高分辨率全球导航卫星系统数据，我们观测了2014年12月7日03：26 UT在中国太原发射的长征四号乙火箭引发的短周期同心行进电离层扰动（CTID）。在发射后约22分钟观测到的总电子含量（TEC）扰动的幅度为0.1-0.3个TEC单位，水平相速度为0.832 - 1，348 m/s，持续时间为0.600 s。这些扰动的周期为1090 -200 s，是迄今为止报道的火箭发射期间激发的最短周期TID。CTID开始时振幅快速增加，随后是5-6个振幅逐渐减小的周期振荡。观测到5个波阵面连续向南传播，在600 s内向南传播距离约450 km。在传播过程中，扰动幅度缓慢减小，根据不同台站观测到的水平速度方向，发现CTID的源区位于发射场以南约140 km处。CTID很可能是在中层顶区域上方的第二级火箭点火后产生的。
Using high‐resolution global navigation satellite system data with a temporal resolution of 1 s, we presented observations of short‐period concentric traveling ionospheric disturbances (CTIDs) triggered by the launch of the Long March 4B rocket at 03:26 UT 7 December 2014 in Taiyuan, China. The total electron content (TEC) perturbations observed approximately 22 min after the launch have amplitudes of ∼0.1–0.3 TEC units, horizontal phase velocities of ∼832–1,348 m/s, and durations of ∼600 s. With periods of ∼90–200 s, these disturbances are the shortest‐period TIDs excited during rocket launches reported thus far. The CTIDs began with a quick increase in the amplitude, followed by 5–6 periodic oscillations with decreasing amplitude. A continuous southward propagation of 5 wave fronts was observed, which propagated southward at a distance of ∼450 km in 600 s. A slow decrease in perturbation amplitude during propagation was found. According to the direction of horizontal velocity observed by different stations, we found that the source region of the CTIDs was located ∼140 km south of the launch site. The CTIDs were most likely generated after the ignition of second‐stage rockets above the mesopause region.