Ionospheric Tomography

Куницын, В. Е.; Tereshchenko, E. D.

doi:10.1007/978-3-662-05221-1

Cited by 125 publications

(101 citation statements)

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“…Radio tomography (Kunitsyn and Tereshchenko, 2003;Pryse, 2003 and references therein) is a relatively new technique for imaging the spatial distribution of the ionospheric plasma over extended height-versus-latitude planes. It is particularly adept at imaging the plasma distribution in regions of density troughs (Andreeva et al, 1990;Kersley et al, 1997) coverage of the ionosphere at all Universal Times, seasons, geomagnetic and solar conditions.…”

Section: Introductionmentioning

confidence: 99%

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model

et al. 2005

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Abstract. The dayside high-latitude trough is a persistent feature of the post-noon wintertime auroral ionosphere. Radio tomography observations have been used to map its location and latitudinal structure under quiet geomagnetic conditions (K p ≤2) near winter solstice. The trough is also a clear feature in the ion density distribution of the Coupled Thermosphere-Ionosphere-Plasmasphere model (CTIP) under similar geophysical conditions. Comparisons of the measured and modelled distributions show that the plasma production equatorward of the trough is mainly controlled by solar radiation, but there are also other processes maintaining the equatorward trough-wall that are open to debate. The poleward trough-wall is produced by particle precipitation, but the densities are significantly overestimated by the model. At the trough minimum the observed densities are consistent with low nighttime densities convecting sunward to displace the higher daytime densities, but this is not borne out by the CTIP model. The study shows the potential of combining radio tomography and modelling to interpret the balance of the physical processes responsible for large-scale structuring of the high-latitude ionosphere, and highlights the role of tomographic imaging in validating and developing physical models.

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Section: Introductionmentioning

confidence: 99%

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model

et al. 2005

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“…When applied to ionospheric investigations the RO method may be considered as a global tool and can be compared with the global Earth-and space-based radio tomography [42,43]. The RO method delivers a great amount of data on the electron density distribution in the upper and lower ionosphere that are important sources for modernizing the current information over the morphology of the ionosphere and ionospheric processes [44,45].…”

Section: Application Of Gps Ro Methods To Study the Atmosphere And Ionmentioning

confidence: 99%

Radio Wave Propagation Phenomena from GPS Occultation Data Analysis

Pavelyev¹,

Matyugov²,

Yakovlev³

et al. 2013

Wave Propagation Theories and Applications

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“…(6) to the MART algorithm, Eq. (4) can be conver where X j k is the k-th iterated electron density solution and λ is a relaxation parameter (Kunitsyn & Tereshchenko 2003). In matrix expression, Eq.…”

Section: Multiplicative Algebraic Reconstruction Technique (Mart)mentioning

confidence: 99%

Tomography Reconstruction of Ionospheric Electron Density with Empirical Orthonormal Functions Using Korea GNSS Network

Hong¹,

Kim²,

Chung³

et al. 2017

Journal of Astronomy and Space Sciences

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In South Korea, there are about 80 Global Positioning System (GPS) monitoring stations providing total electron content (TEC) every 10 min, which can be accessed through Korea Astronomy and Space Science Institute (KASI) for scientific use. We applied the computerized ionospheric tomography (CIT) algorithm to the TEC dataset from this GPS network for monitoring the regional ionosphere over South Korea. The algorithm utilizes multiplicative algebraic reconstruction technique (MART) with an initial condition of the latest International Reference Ionosphere-2016 model (IRI-2016). In order to reduce the number of unknown variables, the vertical profiles of electron density are expressed with a linear combination of empirical orthonormal functions (EOFs) that were derived from the IRI empirical profiles. Although the number of receiver sites is much smaller than that of Japan, the CIT algorithm yielded reasonable structure of the ionosphere over South Korea. We verified the CIT results with NmF2 from ionosondes in Icheon and Jeju and also with GPS TEC at the center of South Korea. In addition, the total time required for CIT calculation was only about 5 min, enabling the exploration of the vertical ionospheric structure in near real time.

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Ionospheric Tomography

Cited by 125 publications

References 0 publications

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model

Radio Wave Propagation Phenomena from GPS Occultation Data Analysis

Tomography Reconstruction of Ionospheric Electron Density with Empirical Orthonormal Functions Using Korea GNSS Network

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