Statistical characteristics of low-latitude F region presunset bottom-type scattering layers over Fuke

Lyu, Huijuan; Fang, Hanxian; Meng, Xing; Liu, Zhendi; Gao, Ze

doi:10.1016/j.asr.2021.04.040

Cited by 1 publication

(4 citation statements)

References 18 publications

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“…Most of BSLs presented in previous studies occurred after sunset (Hu et al., 2020; Hysell et al., 2004, 2005, 2006), and there were also studies that focus on presunset BSLs (Li et al., 2017; Lyu et al., 2021). In this work, the postmidnight BSLs occurred at low latitude were analyzed.…”

Section: Discussionmentioning

confidence: 99%

“…The BSL was first observed by Jicamarca radar operated at magnetic equator (Woodman & La Hoz, 1976). Then based on observations from other instruments, the BSL was found in low latitude and other longitudes (Hu et al., 2020; Hysell et al., 2005, 2006; Li et al., 2017; Lyu et al., 2021; Patra et al., 2014; Pavan Chaitanya & Patra, 2021; Rodrigues et al., 2004; Takahashi et al., 2010). With the increase of research, its characteristics and corresponding mechanisms have gradually been revealed.…”

Section: Introductionmentioning

confidence: 96%

“…Based on nearly 5 years observational data from Fuke VHF radar, Lyu et al. (2021) studied the occurrence rate of presunset BSL and the influencing factors. They pointed that the geomagnetic disturbances have a certain positive impacts on the generation of presunset BSL.…”

Section: Introductionmentioning

confidence: 99%

“…They discussed the relationship between the presunset BSL and LSWS, indicating the gravity waves play an important role in the generation of presunset BSL. Based on nearly 5 years observational data from Fuke VHF radar, Lyu et al (2021) studied the occurrence rate of presunset BSL and the influencing factors. They pointed that the geomagnetic disturbances have a certain positive impacts on the generation of presunset BSL.…”

mentioning

confidence: 99%

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Occurrence of Postmidnight Bottom‐Type Scattering Layer Over Low Latitude

Meng,

Niu,

Weng

et al. 2023

JGR Space Physics

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The bottom‐type scattering layer (BSL) that occurs at postsunset or presunset has been reported in previous studies. In this work, two cases of postmidnight BSL occurring on geomagnetic quiet days (12 and 29 April 2015) were investigated by using the observational data obtained by beam 4 and 5 of Sanya VHF radar. These BSLs initiate at 00:06–00:18 LT within an altitude range of 220–240 km. Their thickness are relatively uniform, about 10 km. The altitude and Doppler velocities of the BSLs oscillate with time and the oscillation period of Doppler velocities is about 1 hr. During the presence of postmidnight BSL, spread echoes and satellite traces (STs) appeared in the ionograms recorded by Sanya ionosonde. The oscillation of Doppler velocities and the presence of STs suggest that the postmidnight BSL may be related to the F region bottomside large‐scale wave structure. Amplitude scintillations (S4) larger than 0.2 were also recorded by Sanya GPS scintillation receiver. These observations could imply an important role of gravity waves in the generation of the postmidnight BSL.

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