Abstract. We report the investigation of ionospheric response to passage an annular solar eclipse over Southeast Asia on 26 December 2019 using multiple sets observations. Two ionosondes (one at Kototabang and another Pontianak) were used measure dynamical changes in layer during event. A network ground-based GPS receiver stations Indonesia was derive distribution total electron content (TEC) r...

European near-noontime ionosonde observations were considered during the period of deep solar minimum in 2008–2009 to analyze foF2 perturbations not related and geomagnetic activity. Sudden stratospheric warming (SSWs) events January 2008 2009 analyzed. An original method was used retrieve aeronomic parameters from observed electron concentration ionospheric F-region. Atomic oxygen shown be mai...

The unusually deep and extended solar minimum of cycle 23/24 made it very difficult to predict the solar indices 1 or 2 years into the future. Most of the predictions were proven wrong by the actual observed indices. IRI gets its solar, magnetic, and ionospheric indices from an indices file that is updated twice a year. In recent years, due to the unusual solar minimum, predictions had to be co...

We present the ionospheric disturbance responses over low-latitude regions by using total electron content from Geostationary Earth Orbit (GEO) satellites of BeiDou Navigation Satellite System (BDS), ionosonde data and Swarm satellite data, during geomagnetic storm in August 2018. The results show that a prominent (TEC) enhancement is observed main phase storm. There persistent TEC increase las...