Electronic Information School, Wuhan University, Wuhan 430072, China.
Sensors (Basel). 2021 Dec 29;22(1):233. doi: 10.3390/s22010233.
The oblique-incidence ionosonde network in North China is a very unique system for regional ionospheric observation. It contains 5 transmitters and 20 receivers, and it has 99 ionospheric observation points between 22.40° N and 33.19° N geomagnetic latitudes. The data of the ionosonde network were used to investigate the statistical characteristics of the quasi-3-h large-scale traveling ionospheric disturbances (LSTIDs). From September 2009 to August 2011, 157 cases of the quiet-time LSTIDs were recorded; 110 cases traveled southward, 46 cases traveled southwestward and only 1 case traveled southeastward. The LSTIDs mainly appeared between 10:00 and 19:00 LT in the months from September to the following May. We compared the data of the Beijing, Mohe and Yakutsk digisondes and found that the LSTIDs are most likely to come from the northern auroral region. These LSTIDs may be induced by the atmospheric gravity waves (AGWs) and presented obvious seasonal and diurnal varying features, indicating that the thermospheric wind field has played an important role.
华北地区倾斜 incidence 电离层探测仪网络是一个非常独特的区域性电离层观测系统。它包含 5 个发射器和 20 个接收器，在 22.40°N 到 33.19°N 地磁纬度之间有 99 个电离层观测点。该探测仪网络的数据被用于研究准 3 小时大尺度行扰（LSTIDs）的统计特征。从 2009 年 9 月到 2011 年 8 月，记录了 157 例宁静时间 LSTIDs；其中 110 例向南传播，46 例向西南传播，只有 1 例向东南传播。LSTIDs 主要出现在 LT 时间的 10:00 到 19:00 之间，在 9 月到次年 5 月的月份中。我们比较了北京、漠河和雅库茨克数字探测仪的数据，发现 LSTIDs 最有可能来自于北部极光区域。这些 LSTIDs 可能是由大气重力波（AGWs）引起的，并呈现出明显的季节性和昼夜变化特征，表明高层大气风场起到了重要作用。
