Strong Range SF Observed in Low Latitude Ionosphere over Acsension IS in Atlantic Ocean

	Strong Range SF Observed in Low Latitude Ionosphere over Acsension IS in Atlantic Ocean
	Wang, Zheng; Shi, Jiankui; Wang, Guojun; Wang, Xiao; Ratovsky, Konstantin; Romanova, Elena
	2017
会议日期	MAY 22-25, 2017
会议地点	St Petersburg, RUSSIA
页码	1879-1883
英文摘要	In the ionogram obtained by sweep frequency radar named ionosonde, the spread echoes in the radio waves indicate the ionospheric plasma irregularities which can scatter, refract and reflect radio wave. The spread echoes are called ionospheric Spread F (SF). SF is considered to have different types: Range SF, Frequency SF, Mixed SF, and Branch SF. Recently some authors, using data from Asian and American continents, found an independent type of spread F named strong range SF (SSF) in low latitude ionosphere, and also found no BSF at low latitude. In this paper, with data from Digisonde at Acsension IS station (7.9 degrees S, 345.6 degrees E; Magnetic 2.3 degrees S) in the low latitude region in Atlantic Ocean in 2004, the occurrence features of SF, especially SSF, were statistically studied. The results showed that there were RSF, SSF, FSF and MSF with occurrences of 5.2%, 23.6%, 26.5% and 44.7%, respectively. The SSF have high occurrence from January to March and from September to December, and have low occurrence from April to August. The SSF accounted for about 30% of all SF in summer and equinoxes, and about 5% of all SF in winter. The SSF mainly occurred at LT 21: 00-23: 00 in which the ionospheric scintillation just has high occurrence, which suggest that the SSF is associated with Equatorial plasma bubbles. The monthly occurrence variation and the appearance period of SSF were much different from other types of SF. Our results show that the SSF can take place in low latitude ionosphere not only over Asian and American continents, but also over Atlantic Ocean.
会议录	2017 PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM - SPRING (PIERS)
语种	英语
ISBN号	978-1-5090-6269-0
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/6303]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	Wang, Zheng,Shi, Jiankui,Wang, Guojun,et al. Strong Range SF Observed in Low Latitude Ionosphere over Acsension IS in Atlantic Ocean[C]. 见:. St Petersburg, RUSSIA. MAY 22-25, 2017.