A method for the automatic calculation of electron density profiles from vertical incidence ionograms

Jiang, Chunhua; Yang, Guobin; Zhao, Zhengyu; Zhang, Yuannong; Zhu, Peng; Sun, Hengqing; Zhou, Chen

doi:10.1016/j.jastp.2013.10.012

Cited by 18 publications

(18 citation statements)

References 20 publications

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“…Observations by Jacamarca radar [Hysell, 2000] show that the ionosphere (bottom-type layer) often moved upward before the occurrence of bottomside and topside spread F. However, the present case is an extremely unusual phenomenon for observations of spread F, because the movement of the peak height of the ionosphere was downward before the occurrence of daytime spread F. In the following sections, we will discuss the possible mechanisms for the formation of the daytime spread F at low latitudes. Observations by Jacamarca radar [Hysell, 2000] show that the ionosphere (bottom-type layer) often moved upward before the occurrence of bottomside and topside spread F. However, the present case is an extremely unusual phenomenon for observations of spread F, because the movement of the peak height of the ionosphere was downward before the occurrence of daytime spread F. In the following sections, we will discuss the possible mechanisms for the formation of the daytime spread F at low latitudes.…”

Section: Introductionmentioning

confidence: 68%

Ionosonde observations of daytime spread F at low latitudes

et al. 2016

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Spread F on ionograms has been considered to be a phenomenon mainly occurred at nighttime. This study presented a case study of daytime spread F observed by the ionosonde installed at Puer (PUR; 22.7°N, 101.05°E; dip latitude 12.9°N), where daytime spread F that lasted for more than 2 h (about 08:30 LT~10:45 LT) was observed on 14 November 2015. To investigate the possible mechanism, ionograms recorded at PUR and Chiang Mai (18.76°N, 98.93°E; dip latitude 9.04°N) were used in this study. We found that traveling ionospheric disturbances were observed before the occurrence of daytime spread F. Meanwhile, the movement of the peak height of the ionosphere was downward. We suggested that downward vertical neutral winds excited by traveling atmospheric disturbances/atmospheric gravity waves might play a significant role in forming daytime spread F over PUR during geomagnetic storms.

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Section: Introductionmentioning

confidence: 68%

Ionosonde observations of daytime spread F at low latitudes

et al. 2016

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“…However, the difference between the parameters of the F 2 layer in the IRI model and the observational value is large. Referring to Jiang et al (2014), the search range for the ionospheric model parameters is set as are the predicated values of IRI2012.…”

Section: Obtain the Optimal Model Parametersmentioning

confidence: 99%

“…Groundbased HF radio ionospheric sounding techniques, including vertical sounding, oblique sounding, and oblique backscatter sounding, are still important methods for studying ionospheric electron density profiles. There are hundreds of ionosonde stations around the world that record vertical incidence ionograms day and night, and a significant amount of work has been invested in the automatic calculation of electron density profiles using these ionograms (Galkin et al, 1996, Jiang et al, 2014, Reinisch and Huang, 1982, Reinisch and Huang, 1983, Titheridge, 1985, Zheng et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

Ionospheric electron density profile estimation using commercial AM broadcast signals

Cheng

et al. 2015

Journal of Atmospheric and Solar-Terrestrial Physics

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“…The vertical ionogram inversion algorithm in this study follows the method proposed by Jiang et al . []. The height resolution of IED inversed by VI is 3.84 km.…”

Section: Experiments Descriptionmentioning

confidence: 99%

Comparisons of ionospheric electron density distributions reconstructed by GPS computerized tomography, backscatter ionograms, and vertical ionograms

Zhou

Yong

et al. 2015

JGR Space Physics

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Global Positioning System (GPS) computerized ionosphere tomography (CIT) and ionospheric sky wave ground backscatter radar are both capable of measuring the large‐scale, two‐dimensional (2‐D) distributions of ionospheric electron density (IED). Here we report the spatial and temporal electron density results obtained by GPS CIT and backscatter ionogram (BSI) inversion for three individual experiments. Both the GPS CIT and BSI inversion techniques demonstrate the capability and the consistency of reconstructing large‐scale IED distributions. To validate the results, electron density profiles obtained from GPS CIT and BSI inversion are quantitatively compared to the vertical ionosonde data, which clearly manifests that both methods output accurate information of ionopsheric electron density and thereby provide reliable approaches to ionospheric soundings. Our study can improve current understanding of the capability and insufficiency of these two methods on the large‐scale IED reconstruction.

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A method for the automatic calculation of electron density profiles from vertical incidence ionograms

Cited by 18 publications

References 20 publications

Ionosonde observations of daytime spread F at low latitudes

Ionosonde observations of daytime spread F at low latitudes

Ionospheric electron density profile estimation using commercial AM broadcast signals

Comparisons of ionospheric electron density distributions reconstructed by GPS computerized tomography, backscatter ionograms, and vertical ionograms

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