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

Zhou, Chen; Yong, Lei; Li, Bofeng; An, Jiachun; Zhu, Peng; Jiang, Chunhua; Zhao, Zhengyu; Zhang, Yuannong; Ni, Binbin; Wang, Zemin; Xiao-Hong, Zhou

doi:10.1002/2015ja021855

Cited by 5 publications

(4 citation statements)

References 97 publications

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“…The ionospheric tomography process based on simulated ADS-B signal data is roughly as follows: first, the ionospheric tomography area is determined; second, the electronic density grid is divided and the grid electronic density is pixelized; third, according to the TEC data measured by the simulated ADS-B signal data, the projection matrix is determined and a set of equations is established; fourth, the initial value of the algorithm iteration is determined (this article uses the IRI-2012 model as the initial value); finally, a suitable algorithm is chosen to solve the electron density [20,21].…”

Section: Ionospheric Computerized Tomographymentioning

confidence: 99%

Computerized Ionospheric Tomography Based on the ADS-B System

Yuan

Zhu²,

Wang³

et al. 2023

Atmosphere

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The broadcast automatic dependent surveillance (ADS-B) system is a new-generation air traffic control system designed to avoid the waste of resources in secondary radars. The establishment of the spaceborne ADS-B system provides a broad prospect for ionospheric tomography. In this paper, the external observation information of the ionosphere is obtained by measuring the Faraday rotation angle, that is, the total electron content (TEC). Tomography research can be carried out all over the world to conduct large-scale ionospheric electron density research. The experiment selected two different regions and had a time resolution of two hours, a height resolution of 200 km, a latitude resolution of 2°, and a longitude resolution of 5°. Based on the simulated spaceborne ADS-B signal to invert the regional ionospheric electron density, the latitude, longitude, and height distributions of inversion result are basically consistent with those of the actual ionospheric electron density.

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Section: Ionospheric Computerized Tomographymentioning

confidence: 99%

Computerized Ionospheric Tomography Based on the ADS-B System

Yuan

Zhu²,

Wang³

et al. 2023

Atmosphere

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“…Moreover, many algorithms have been proposed to invert the leading edge of the swept-frequency backscatter ionograms to achieve the electron density profile, such as the inversion algorithm using simulated annealing [ 114 ], the ionospheric F 2 region inversion approach utilizing a single quasi-parabolic ionospheric model [ 115 ], or the IRI model combined with ray-tracing techniques [ 116 ]. In order to validate these inversion algorithms, several experiments were conducted by Zhou et al to make comparisons between the ionospheric electron density distributions reconstructed by GPS computerized tomography, backscatter ionograms, and vertical ionograms [ 117 ].…”

Section: Development Of Wiobss Operating At Low Transmit Powermentioning

confidence: 99%

Wuhan Ionospheric Oblique Backscattering Sounding System and Its Applications—A Review

Shi

Yang

Jiang

et al. 2017

Sensors

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For decades, high-frequency (HF) radar has played an important role in sensing the Earth’s environment. Advances in radar technology are providing opportunities to significantly improve the performance of HF radar, and to introduce more applications. This paper presents a low-power, small-size, and multifunctional HF radar developed by the Ionospheric Laboratory of Wuhan University, referred to as the Wuhan Ionospheric Oblique Backscattering Sounding System (WIOBSS). Progress in the development of this radar is described in detail, including the basic principles of operation, the system configuration, the sounding waveforms, and the signal and data processing methods. Furthermore, its various remote sensing applications are briefly reviewed to show the good performance of this radar. Finally, some suggested solutions are given for further improvement of its performance.

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“…Until now, various techniques have been used to empirically measure TEC. Some examples include: ionosondes 2 , 3 , incoherent backscatter radars 2 , 4 , 5 , Faraday Rotation (FR) in beacon satellite signals 2 , 6 – 8 , altimeter satellite systems, and Global Navigation Satellite Systems (GNSS) 1 , 9 . The Global Positioning System (GPS) satellites, provide an effective and low-cost method to measure TEC values 10 , 11 as a function of time for a specific location on the Earth.…”

Section: Introductionmentioning

confidence: 99%

Development of a local empirical model of ionospheric total electron content (TEC) and its application for studying solar-ionospheric effects

Davoudifar

Tabari

Shafigh

et al. 2021

Sci Rep

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Regular and irregular variations in total electron content (TEC) are one of the most significant observables in ionospheric studies. During the solar cycle 24, the variability of ionosphere is studied using global positioning system derived TEC at a mid-latitude station, Tehran (35.70N, 51.33E). Based on solar radio flux and seasonal and local time-dependent features of TEC values, a semi-empirical model is developed to represent its monthly/hourly mean values. Observed values of TEC and the results of our semi-empirical model then are compared with estimated values of a standard plasmasphere–ionosphere model. The outcome of this model is an expected mean TEC value considering the monthly/hourly regular effects of solar origin. Thus, it is possible to use it for monitoring irregular effects induced by solar events. As a result, the connection of TEC variations with solar activities are studied for the case of coronal mass ejections accompanying extreme solar flares. TEC response to solar flares of class X is well reproduced by this model. Our resulting values show that the most powerful flares (i.e. class X) induce a variation of more than 20 percent in daily TEC extent.

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

Cited by 5 publications

References 97 publications

Computerized Ionospheric Tomography Based on the ADS-B System

Computerized Ionospheric Tomography Based on the ADS-B System

Wuhan Ionospheric Oblique Backscattering Sounding System and Its Applications—A Review

Development of a local empirical model of ionospheric total electron content (TEC) and its application for studying solar-ionospheric effects

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