Obtaining Ionospheric Conditions according to Data of Navigation Satellites

Maltseva, O. A.; Mozhaeva, N.S.

doi:10.1155/2015/804791

Cited by 6 publications

(4 citation statements)

References 48 publications

(72 reference statements)

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“…However, locations and magnitudes of their longitudinal features, as seen at different latitudes and LT, can be different. There are many publications where people try to convert the vertical TEC derived from much more dense GPS networks than the ionosonde one into the absent N m F 2 values using very simple formulas [ Houminer and Soicher , ; Krankowski et al ., ; Yu et al ., ; Maltseva and Mozhaeva , ]. We wanted to stress that our results do not support correctness of such simple conversion between N m F 2 /IEC/TEC.…”

Section: Discussionmentioning

confidence: 70%

Longitudinal variation in the ionosphere‐plasmasphere system at the minimum of solar and geomagnetic activity: Investigation of temporal and latitudinal dependences

Клименко

Zakharenkova

et al. 2016

Radio Science

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We use the Global Self-consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP) as the first-principle calculation of the physical system state, the quick-run ionospheric electron density model (NeQuick) as the climatology background, and the International Reference Ionosphere-based Real-Time Assimilative Model for a global view of the ionospheric weather during a quiet period of the December 2009 solstice. The model computations are compared to the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation profiles, CHAMP and Gravity Recovery and Climate Experiment in situ densities, and GPS total electron content (TEC). It is shown that the plasma density in the ionosphere is generally larger in the American/Atlantic longitudinal sector at any local time. The high-latitude density enhancements are visible in the GSM TIP output at different altitudes but are not reproduced by the NeQuick empirical model. Given that observational data confirm an existence of the high-latitude areas where ionospheric densities are elevated in the altitude range between 300 and 480 km, we conclude that the N m F 2 maximum in the GSM TIP output can be trusted. Indeed, such high-latitude N m F 2 , ionospheric electron content, and TEC maxima in the American longitude sector form on the proper places as shown by the GSM TIP data, COSMIC and GPS observations. According to our results, the high-latitude maximum of N m F 2 (1) manifests itself only when the integration over LT or UT of the global maps for 22 December 2009 includes nighttime, i.e., supporting an argument of its close association with the Weddell Sea Anomaly, and (2) also appears in the N e distribution at altitudes above the F 2 peak.

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Section: Discussionmentioning

confidence: 70%

Longitudinal variation in the ionosphere‐plasmasphere system at the minimum of solar and geomagnetic activity: Investigation of temporal and latitudinal dependences

Клименко

Zakharenkova

et al. 2016

Radio Science

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“…Thus, the efficiency coefficients indicate in how many times increases consistency between the calculated and experimental values in these two cases. In reference [39], differences between τ(IRI) and τ(med) are illustrated for stations in various regions of globe: Juliusruh, Goosebay, Thule, Grahamstown, Ascension Island in a daily course for July and December of several years from 2002 to 2010. In Figure 10, illustration of differences is given on an example of July and December for reference station Juliusruh, map JPL and moderate level of solar activity (2004).…”

Section: Comparison Of Model and Observational Values Of τmentioning

confidence: 99%

“…Consider how the behavior of τ corresponds to the assumptions of the model. The behavior of τ depending on the level of solar activity can be obtained from [39], which shows the daily variations of τ(med) and τ(IRI) for July and December in different years in the range of 2002-2010 for the stations from different latitudinal zones of the globe from auroral to equatorial (Juliusruh, Goosebay, Thule, Grahamstown, Ascension Island). This behavior includes both nonlinear changes and the constancy of the values in the daytime.…”

Section: About a Global Model Of τ(Med)mentioning

confidence: 99%

Empirical Modeling of the Total Electron Content of the Ionosphere

Maltseva¹,

Mozhaeva²

2016

Empirical Modeling and Its Applications

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With the appearance of such satellite systems as GPS, GLONASS, Galileo, and others, the total electron content TEC measured by means of navigational satellites became a key parameter characterizing a state of the ionized space. In turn, functioning of navigational and telecommunication systems needs models of TEC for an estimation of accuracy of positioning, for the short-term and long-term prediction of this parameter. In this Chapter, empirical models of the total electron content are presented. The new result is their comparison. It is shown that the majority of them provide an adequate accuracy and reliability. As the basic application of TEC measurements, the problem of determination of maximum concentration NmF2 of the ionosphere with use of its equivalent slab thickness τ is considered. It is shown that existing models of τ are not global and do not provide sufficient accuracy in determining NmF2. An approach for new global model is offered.

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“…Additionally, we can use receivers of signals from navigation satellites of systems such as GPS, GLONASS providing information about the total electronic content TEC. In the paper [12], the possibility of using TEC to obtain critical frequencies has shown. In the end of the second section, the possibility to use ТЕС to estimate the ionospheric state is shown in the large number of points in a considered zone.…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of the behavior of the ionosphere and HF propagation parameters in September 2017

Blagoveshchensky

Maltseva

Nikitenko

et al. 2018

AIP Conference Proceedings

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Due to increasing of economic and scientific activity in the high latitude regions interest to information tools has been raised. One of the basic ways of exchanging information is the propagation of high-frequency (HF) waves, which requires knowledge of the state of the ionosphere. One of the main ways to describe this state is to use models. In the present paper, the most widespread model IRI2016 is used, however it has not been adequately tested in the high latitude regions, especially from oblique sounding and during disturbances. Results of testing the state of the ionosphere and the characteristics of HF propagation are presented for the period of September 2017, the month with the strongest disturbance at the end of the year. Two methods: analytical and numerical modelling, based on ray tracing, were used to determine the maximum usable frequency MUF on the paths of Gorkovskaya-Lovozero and Cyprus-Lovozero. A special feature of the study is the use of vertical and oblique sounding data with a 15-minute resolution. It is shown, that during the period of September 6-8, the MUF experienced a positive disturbance. The model values corresponded to the experimental magnitudes rather well. The possibility of using the analytical method for obtaining the MUF is confirmed by ray tracing. It is shown, that for monitoring of ionospheric conditions along any path it is possible to use the total electron content measured by means of navigation satellites GPS, GLONASS.

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Obtaining Ionospheric Conditions according to Data of Navigation Satellites

Cited by 6 publications

References 48 publications

Longitudinal variation in the ionosphere‐plasmasphere system at the minimum of solar and geomagnetic activity: Investigation of temporal and latitudinal dependences

Longitudinal variation in the ionosphere‐plasmasphere system at the minimum of solar and geomagnetic activity: Investigation of temporal and latitudinal dependences

Empirical Modeling of the Total Electron Content of the Ionosphere

Peculiarities of the behavior of the ionosphere and HF propagation parameters in September 2017

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