Statistical characteristics of ionogram spread-F and satellite traces over a Chinese low-latitude station Sanya

Zhu, Zhengping; Lan, Jiaping; Luo, Weihua; Sun, Fenglian; Chen, Kun; Chang, Sue-min

doi:10.1016/j.asr.2015.03.038

Cited by 17 publications

(10 citation statements)

References 38 publications

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“…It was found that onset time of RSF in summer months was later than in equinoxes in Fig. 3, which is consistent with the results over Sanya (18° N, 109° E, Dip latitude 8° N) presented in Zhu et al (2015). The sunset time and the occurrence time of PRE were later in summer months, and it is responsible for the later onset time of RSF (Fejer et al 1999).…”

Section: Observations and Statistical Resultssupporting

confidence: 89%

“…However, FSF occurred frequently in summer solstices of low sunspot years and after midnight. The similar results of RSF and FSF were also shown by Zhu et al (2015). Wang et al (2010) showed that the occurrence of MSF, observed before midnight, was maximum in summer months during low solar conditions.…”

Section: Introductionsupporting

confidence: 80%

“…Statistical characteristics of nighttime SF have been studied over the past several decades. Earlier observational evidences suggested that the occurrence of SF at equator and low latitudes has obvious diurnal, latitudinal, longitudinal, seasonal, solar cycle and geomagnetic activity variations (Abdu et al 1981(Abdu et al , 1985Li et al 2010;Upadhayaya and Gupta 2014;Rungraengwajiake et al 2013;Wang et al 2010;Dabas et al 2007;Zhu et al 2015;Wang et al 2018). Pezzopane et al (2013) performed a comparative analysis of equinoctial SF characteristics at different longitude sectors at low latitudes using observations of ionosonde.…”

Section: Introductionmentioning

confidence: 99%

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Statistical analysis of low-latitude spread F observed over Puer, China, during 2015–2016

Lan

Jiang

Yang

et al. 2019

Earth Planets Space

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Statistical analysis of spread F (SF), recorded at Puer (PUR, 22.7° N, 101.05° E, Dip Latitude 12.9° N) during 2015-2016, was carried out to reveal its characteristics at the northern equatorial ionization anomaly. In our study, SF was categorized into four types, frequency spread F (FSF), range spread F (RSF), mix spread F (MSF) and strong range spread F (SSF). The statistical results presented that FSF and MSF were dominant over Puer. Most types of SF appeared mostly in summer months, except the maximum occurrence of SSF in equinox months. Moreover, observations of SF events also showed that the solar activity and magnetic activity dependence of SF varied with seasons. Compared with observations at other region, the present results suggest that medium-scale traveling ionospheric disturbances (MSTIDs) may play a key role in generation of SF in low-latitude region.

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Section: Observations and Statistical Resultssupporting

confidence: 89%

Section: Introductionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Statistical analysis of low-latitude spread F observed over Puer, China, during 2015–2016

Lan

Jiang

Yang

et al. 2019

Earth Planets Space

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“…Ionograms recorded at Sanya during 2012-2013 were analyzed by Zhu et al [61] to investigate the occurrence characteristics of the spread-F and satellite traces (STs). The diurnal spread-F peaks post-sunset in equinox and post-midnight in the summer months.…”

Section: Ionospheric Irregularities and Scintillationsmentioning

confidence: 99%

New understanding achieved from 2 years of Chinese ionospheric investigations

Liu

Wan

2016

Science Bulletin

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“…The periodic electric fields generated by gravity waves in the off‐equatorial E region mapped into the equatorial F region along the magnetic field lines can be likely source for such electric fields. The presence of large‐scale wave structure (LSWS) at the bottomside of the F region is considered as early manifestation for such seed perturbation [ Kelley et al , ; Tulasi Ram et al , ; Zhu et al , ; Joshi et al , ]. These LSWS can also serve as a source for such spatially varying electric fields.…”

Section: Introductionmentioning

confidence: 99%

Disturbance dynamo effects over low‐latitude F region: A study by network of VHF spaced receivers

et al. 2017

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Generation of equatorial spread F (ESF) irregularities resulting from magnetic disturbance is known for past few decades. However, better prediction models for this phenomenon are still lacking. Magnetic storms also affects the F region plasma drifts. In this work we examined variability in (i) occurrence of such freshly generated ESF and (ii) low‐latitude F region zonal plasma drifts over Indian longitude. For this purpose simultaneous observations of amplitude scintillations on 251 MHz signal, recorded by a network of spaced receivers located at low‐latitude stations, are utilized. Observational stations are situated such that it longitudinally (latitudinally) covers an area of 5.6° (13°). Here effect of disturbance dynamo (DD) electric field at low‐latitude F region and its variability are studied for three magnetic storms occurring in 2011. These magnetic storms are having nearly similar type characteristics except their start time. We find that as time difference (i.e., ΔT) between local sunset and start of magnetic activity decreases, the DD effects seen at low‐latitude F region zonal irregularity drift around midnight becomes stronger. For a given magnetic storm the DD effect on F region zonal irregularity drifts is found to be only marginally stronger at dip equator in comparison to off‐equatorial stations. Although effect of DD on F region zonal irregularity drifts are felt simultaneously, generation of fresh ESF is variable within a smaller longitudinal belt of 5.6°. It is attributed to the presence of LSWS at the bottomside of F region, as initiation of ESF is highly likely (unlikely) in the vicinity of crest (trough) of such LSWS.

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Statistical characteristics of ionogram spread-F and satellite traces over a Chinese low-latitude station Sanya

Cited by 17 publications

References 38 publications

Statistical analysis of low-latitude spread F observed over Puer, China, during 2015–2016

Statistical analysis of low-latitude spread F observed over Puer, China, during 2015–2016

New understanding achieved from 2 years of Chinese ionospheric investigations

Disturbance dynamo effects over low‐latitude F region: A study by network of VHF spaced receivers

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