A preliminary study of the single crest phenomenon in total electron content (TEC) in the equatorial anomaly region around 120 degrees E longitude between 1999 and 2012

作者：Huang, Linfeng; Wang, Jinsong^*; Jiang, Yong; Huang, Jiang; Chen, Zhou; Zhao, Kai

来源：Advances in Space Research, 2014, 54(11): 2200-2207.

DOI：10.1016/j.asr.2014.08.021

• Equatorial ionisation anomaly
• Single crest phenomenon
• Total electron content

The diurnal variations in total electron content (TEC) in the equatorial ionisation anomaly (ETA) region are not always represented by two crests on both sides of the magnetic equator. Sometimes, only an obvious single crest is evident at equatorial and low latitudes. In this paper, we focus on analysis of the morphological features of the single crest phenomenon in TEC around 120 degrees E longitude during geomagnetic quiet days (Kp < 4_). The variations in TEC are also compared with morphological parameters (foF2 and hmF2) derived from the International Reference Ionosphere extended to Plasmasphere (IRI Plas) model. Our results show that the single crest phenomenon occurs mainly on days with extremely low solar activity, while the corresponding F2 layer critical frequency showed obvious asymmetry, or even only a single peak.

• 出版日期2014-12-1
• 单位南京信息工程大学; 武汉大学