Analysis of global TEC prediction performance of IRI-PLAS model

Alçay, Salih; Öztan, Gürkan

doi:10.1016/j.asr.2019.02.002

Cited by 10 publications

(4 citation statements)

References 20 publications

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“…1b-k), and they could be observed permanently for several days with slight changes in their form and intensity. Andersson et al (2014) detected a hot spot of energetic electron precipitation E > 300 keV in the SH at geomagnetic latitudes between 55 and 72 • S (that was much less pronounced in the NH) and at geographic longitudes between 150 • W and 60 • E. However, this result is based on nighttime observations, i.e., predominantly autumn-winter observations, when almost no LTEs were detected. Using Polar Orbiting Environmental Satellites (POES) data for the analysis of the South Atlantic Anomaly, Domingos et al (2017) found a particle flux plume located within L = 2.5-3 in the South Atlantic.…”

Section: Discussionmentioning

confidence: 83%

Localized total electron content enhancements in the Southern Hemisphere

Edemskiy

2020

Ann. Geophys.

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Abstract. This paper is dedicated to the investigation of localized TEC (total electron content) enhancements (LTEs), which were detected in the Southern Hemisphere via the analysis of global ionospheric maps. Using data from different years (2014, 2015 and 2018), we show the presence of LTEs almost independently of solar activity. We also show that LTEs are a phenomenon that can be observed in serial: at the same universal time (UT), similar enhancement can manifest themselves over several days. The intensity of LTEs varies depending on the solar flux and does not directly depend on the interplanetary magnetic field orientation; these events occur under both geomagnetically disturbed and quiet conditions. The highest LTE occurrence rate was observed during the period of local winter (April–September) in all years analyzed. The longest observed LTE series was detected during 2014 and lasted 80 d – or 120 d if we exclude two daily gaps.

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Section: Discussionmentioning

confidence: 83%

Localized total electron content enhancements in the Southern Hemisphere

Edemskiy

2020

Ann. Geophys.

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“…4 . This is due to the equatorial ionization anomaly [ [74] , [75] , [76] ]. Addis Ababa is located close to the magnetic equator.…”

Section: Resultsmentioning

confidence: 99%

“…Addis Ababa is located close to the magnetic equator. Therefore, eastward electric fields move the F-region plasma near the magnetic equator upward by ExB drift and poleward along the magnetic field lines due to diffusion, so that the electron density near the magnetic equator decreases [ 74 , 75 ]. The day-to-day variation of the zonal electric field could change the electron density near the magnetic equator.…”

Section: Resultsmentioning

confidence: 99%

Performance evaluation of IRI-Plas 2017 model with ionosonde data measurements of ionospheric parameters

Endeshaw,

Seyoum

2023

Heliyon

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“…Many scholars utilize the measured data to evaluate the IRI model, refer to Refs. [33][34][35][36][37][38][39][40][41][42][43]. The literature includes the comparison between the IRI model and the site-measured data, in which the sites are mainly located in the equatorial ionization anomaly (EIA) edge region, and also the comparison with the International GNSS Service (IGS) vertical total electron content (VTEC) maps.…”

Section: Introductionmentioning

confidence: 99%

Research on Sea Surface Elliptical Current Remote Sensing With Single-Station Wide-Beam High-Frequency Sky–Surface Wave Radar

Feng,

Fang,

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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This paper describes a new elliptical current ( E ssw v − ) retrieval scheme for single-station wide-beam high-frequency skysurface wave radar, which focuses on solving the problem of locating scattering patches on the sea surface. To start with, the measured data of the Digisonde Portable Sounder (DPS) are exploited to correct the international reference ionosphere (IRI) model, which is capable of realizing the precise application of the IRI model to a certain extent. Subsequently, the scattering patches are located by combining the 3D ray tracing and the corrected IRI model, and the radio wave incidence angles are obtained to calculate the theoretical Bragg frequency. Finally, the large-area elliptical currents are retrieved on the basis of the correction of sea echoes with ionosphere phase contamination extracted from direct waves. The effectiveness of this scheme is verified by comparing E ssw v − with surface wave radar current products and by comparing with location algorithm under the plane ionosphere assumption. The main achieved results are as follows. The predicted value of E ssw v − by the location algorithm proposed in this paper is more accurate than that obtained from the plane ionosphere location algorithm. The directions of E ssw v − are in good agreement with the surface wave radar current product, and the root mean square error (RMSE) of E ssw v − is about 11.70 cm/s. In the detection core area, such an error is about 7.76 cm/s, and the scattering patches with smaller group paths exhibit higher retrieval accuracy of E ssw v − . The relative error of E ssw v − in the core area demonstrates an ascending trend in the local time interval of 9:32 ~ 10:29, revealing that the effectiveness of this scheme could be affected by the ionosphere disturbance.

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Analysis of global TEC prediction performance of IRI-PLAS model

Cited by 10 publications

References 20 publications

Localized total electron content enhancements in the Southern Hemisphere

Localized total electron content enhancements in the Southern Hemisphere

Performance evaluation of IRI-Plas 2017 model with ionosonde data measurements of ionospheric parameters

Research on Sea Surface Elliptical Current Remote Sensing With Single-Station Wide-Beam High-Frequency Sky–Surface Wave Radar

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