Superposed epoch studies have been carried out in order to determine the ionospheric response at mid-latitudes to southward turnings of the interplanetary magnetic field (IMF). This is compared with the geomagnetic response, as seen in the indices Kp, AE and Dst. The solar wind, IMF and geomagnetic data used were hourly averages from the years 1967–1989 and thus cover a full 22-year cycle in th...

There are remarkable ionospheric discrepancies between space-borne (COSMIC) measurements and ground-based (ionosonde) observations, the could decrease accuracies of model developed by multi-source data seriously. To reduce two observational systems, peak frequency (foF2) height (hmF2) derived from COSMIC ionosonde used to develop models an artificial neural network (ANN) method, respectively. T...

Ionospheric irregularities can severely degrade radio communication and navigation systems. Geomagnetic storms may affect the generation of these in a way that is not yet fully understood. To improve forecasting this phenomenon, we need to study ionosphere different regions world, particular equatorial ionization anomaly (EIA) where are usually more intense. This analyses effect geomagnetic on ...

This work presents, for the first time, analysis of occurrence ionospheric irregularities during geomagnetic storms at Tucumán, Argentina, a low latitude station in Southern American longitudinal sector (26.9°S, 294.6°E; magnetic 15.5°S) near southern crest equatorial ionization anomaly (EIA). Three occurred on May 27, 2017 (a month rates spread-F), October 12, 2016 transition from to high spre...

İyonosferik parametrelerin değişimi, uzay iklimi, haberleşme ve seyrüsefer konularındaki çalışmalarda oldukça önemli bir role sahiptir. Bu çalışmada, derin öğrenme yöntemlerinden olan Çok Katmanlı Algılayıcılar (ÇKA) regresyonu modelinin F2 katmanı kritik frekansı (foF2), tepe elektron yoğunluğunun yüksekliği (hmF2) toplam içeriği (TEC) gibi iyonosfer parametrelerini kestirim performansı analiz...

Based on the multi-data of global ionospheric map (GIM), total electron content (TEC) inversed from GPS observations, critical frequency F2 layer (fOF2) ionosonde, density (Ne), temperature (Te), and He+ O+ densities detected by China Seismo-Electromagnetic Satellite (CSES), temporal spatial characteristics multi-parameter perturbations were analyzed around Maerkang Ms6.0 earthquake swarm 9 Jun...