An uninterrupted multi-day (6–8 May 2013) ionospheric F-region event with features indicative of medium-scale traveling disturbances (MSTIDs) was detected the Millstone Hill (MH) incoherent scatter radar (ISR). It later identified, addition Global Positioning System total electron content (GPS-TEC) imaging, as a novel phenomenon. This phenomenon is herein termed semi-coherent pulsing structures...

Global Positioning System (GPS) satellites broadcast at frequencies of 1,575.42 MHz (L1) and of 1,227.60 MHz (L2). The dispersive property of the ionosphere can be used to combine independent measurements at the two frequencies to estimate the total electron content (TEC) between a GPS receiver site and a broadcasting satellite. Such measurements, made at sites near to Very Long Baseline Interf...

GPS total electron content (TEC) measurements were used to investigate high-m ultralow frequency (ULF) waves during the recovery phase of a geomagnetic storm. ULF wave signals in TEC data show high coherence and significant common power wavelet cross transform analyses with magnetic field radial component from GOES-15. They did not cause ionospheric scintillation or ground signatures due screen...

İyonosfer tabakası, Küresel Konumlandırma Sistemi (GPS) uydularına ait radyo sinyallerinin frekanslarına bağlı olarak zaman gecikmesine neden olan bir ortamdır. Çoğu iyonosferik çalışma, GPS gözlemlerinden elde edilen toplam elektron içeriği (TEC) değişimleri kullanılarak gerçekleştirilmektedir. Günümüzde iyonosferin fiziksel yapısı ile ilgili çalışmalar, uzay iklim koşullarının tahmini, konuml...

With the recent increase in the satellite-based navigation applications, the ionospheric total electron content (TEC) and the L-band scintillation measurements have gained significant importance. In this paper we present the temporal and spatial variations in TEC derived from the simultaneous and continuous measurements made, for the first time, using the Indian GPS network of 18 receivers loca...

On 21 May 2021 (UT), Yangbi Ms6.4 and Maduo Ms7.4 earthquakes occurred in mainland China. This paper analyzed the ionospheric perturbations possibly related to earthquake, based on global positioning system (GPS) total electron content (TEC) ionosphere map (GIM) TEC data. We identified GPS anomalies by sliding quartile, statistical analysis. After eliminating days with high solar activity level...