The global ionosphere map (GIM) total electron content (TEC) data are extensively employed to statistically study the seismic ionospheric disturbance characteristics. Due limitation of spatial coverage ground-based GNSS receivers, in many regions, GIM TEC results obtained by interpolation or extrapolation, and therefore actual accuracy is different. In this paper, based on CMONOC data, a high-p...

Abstract. A three-dimensional model based on time and location is introduced to enhance the accuracy of vertical total electron content (VTEC) global ionosphere maps (GIMs) empirical models. The chosen International Reference Ionosphere 2016 (IRI-2016) observations are GIMs VTEC values from Center for Orbit Determination in Europe (CODE). For this purpose, IRI-2016 considered as a background VT...

This paper introduces a novel technique that uses observation data from GNSS to estimate the ionospheric vertical total electron content (VTEC) using Kriging–Kalman method. The provides method validate accuracy of Ionospheric VTEC analysis within Equatorial Ionization anomaly region. developed alongside solar parameters, such as radio flux (F10.7 cm), Disturbance Storm Time (Dst) and other data...

Abstract Total Electron Content (TEC) modeling is critical for Global Navigation Satellite System (GNSS) users to mitigate ionospheric delay errors. The mapping function usually used Vertical TEC correction models slant and vertical conversion. But the cannot characterize variation in different azimuths between user satellites. error resulting from tends be bigger middle low latitudes. Therefor...

The paper presents the results of estimation effects September 5–12, 2017 solar flares on regional disturbance Earth's ionosphere according to data from a distributed network GNSS stations located mostly in Volga Federal District Russian Federation. processing software package we have developed is used analyze recorded signal power and daily two-frequency phase measurements, as well calculate t...

Abstract The rate of total electron content index (ROTI) and loss lock (LoL) from global navigation satellite system (GNSS) observations are an important data source for ionospheric scintillation study. However, there certain limitations these in study, clearing is to understand the results data. In this paper, variation revisited based on LoL ROTI a spatial dense GNSS network low latitude regi...

The accurate prediction of ionospheric Total Electron Content (TEC) is important for global navigation satellite systems (GNSS), communications and other space applications. In this study, a model IGS-TEC maps are established based on testing several different long short-term memory (LSTM) network (LSTM)-based algorithms to explore direction that can effectively alleviate the increasing error w...

NeQuick2 is a three-dimensional ionospheric electron density empirical model that uses numerical integration to calculate the total content along any line-of-sight (LOS). As one of most commonly used models, it necessary objectively evaluate accuracy and stability over long period, especially mid-latitudes northern hemisphere where ground-based GNSS stations are distributed. Therefore, differen...

Using the data of 382 ground global navigation satellite system (GNSS) network stations in Western China, we studied and analyzed ionospheric disturbances triggered by “Long March” 2D rocket launch Jiuquan, China on December 3, 2017. As compared with previous research, a higher sampling resolution for GNSS (with frequency 1 Hz) was used to obtain more accurate occurrence times propagation veloc...