Abstract Ionosphere Associate Analysis Centers (IAACs) of the International GNSS Service (IGS) independently produce global ionosphere maps (GIMs) total electron content (TEC). The GIMs are based on different modeling techniques, resulting in TEC levels and accuracies. In this study, we evaluated accuracy consistency IAAC during high (2014) low (2018) solar activity periods 24th cycle. our appl...

We present a new high-resolution empirical model for the ionospheric total electron content (TEC). TEC data are obtained from global navigation satellite system (GNSS) receivers with 1° × spatial resolution and 5-min temporal resolution. The linear regression is developed at 45°N, 0°E years 2000–2019 30-min resolution, unprecedented typical models. describes dependency of on solar flux, season,...

On 15 January 2022, a VEI 5 eruption occurred at the submarine Hunga Tonga-Hunga Ha’apai (HTHH) Volcano in Southwest Pacific, causing an ash plume reaching height of 50–55 km. The generated strong acoustic-gravity waves near-field and stations all over world recorded Lamb (LW) that travelled around earth multiple times speed ~0.3 km/s. Here we report ionospheric anomalies due to LW Indonesian i...

Interplanetary shocks can cause violent disturbances in near-earth space. In this paper, we use high time-resolution (1 s) data from ground-based global position system (GPS) receivers to analyze the perturbations of ionosphere total electron content (TEC) when an interplanetary shock impacted Earth’s magnetosphere on March 17, 2015. We found that after arrived at Earth, ...

Under the influence of space weather, abnormal disturbances in ionosphere will distort model seriously and affect global navigation satellite system negatively. This study analyzes ionospheric activity characteristics performance low latitude during a strong geomagnetic storm from 7 to 9 September 2017. The research goals are determine behavior refine latitude. In experiment, vertical total ele...

Global Navigation Satellite Systems have been extensively used to investigate the ionosphere response various natural and man-made phenomena for last three decades. However, ionospheric reaction volcano eruptions is still insufficiently studied understood. In this work we analyzed 11–16 June 2009 VEI class 4 Sarychev Peak eruption by using surrounding Russian Japanese GPS networks. Prominent co...

We summarize the status of FORMOSAT-7/COSMIC-2 (COSMIC-2) mission which has completed its first three years in orbit. COSMIC-2 is a joint U.S./Taiwan program consisting six satellites low-inclination orbits with following payloads: Global Navigation Satellite System radio occultation, in-situ ion velocity meter, and tri-band frequency beacon. The constellation final orbit configuration reached ...

The work presents the application of support vector machine (SVM) with Graphics Processing Unit (GPU) acceleration in developing a regional forecast model for ionospheric total electron content (TEC) over China region. In this study, SVM has past TEC values as inputs well 26 input parameters, which include diurnal variation, seasonal spatial solar activity, geomagnetic and thermospheric wind. o...

An increasing number of terrestrial- and space-based radio-communication systems are influenced by the ionospheric space weather, making state increasingly important to forecast. In this study, a novel extended encoder-decoder long short-term memory (ED-LSTME) neural network, which can predict total electron content (TEC) is proposed. Useful inherent features were automatically extracted from h...

Using large-scope and high-accuracy Global Navigation Satellite System (GNSS) ionospheric monitoring, this study considered the polar ionosphere anomaly morphology caused by an interplanetary shock event that occurred on September 12, 2014. First, we used continuous observation data of GNSS stations in Antarctic region to estimate carrier TEC epochs variation(dTEC) reflects electron density cha...