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Article
Open AccessEffects of equatorial plasma bubble-induced ionospheric gradients on GNSS PPP-RTK
Equatorial plasma bubble (EPB) exerts a severe threat to global navigation satellite system (GNSS) technique. It not only can lead to ionospheric scintillation, but also can create strong plasma gradients in i...
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Article
Comparative study of ionospheric sporadic E occurrence rates using SNRnstd and S4 derived from GPS radio occultation
GPS radio occultation (GPS-RO) data, especially the parameters of signal-to-noise ratio normalized standard deviation (SNRnstd) and S4, are widely used to measure the ionospheric sporadic E (Es) layer. However, t...
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Article
Ionospheric disturbances of the January 15, 2022, Tonga volcanic eruption observed using the GNSS network in New Zealand
In this study, the ionospheric response related to the January 15, 2022, Tonga volcanic eruption is investigated using total electron content extracted from the global navigation satellite system network in Ne...
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Article
Large-area tsunami signatures in ionosphere observed by GPS TEC after the 2011 Tohoku earthquake
The internal gravity waves (IGWs) produced by a tsunami can travel into the ionosphere and trigger traveling ionospheric disturbances (TIDs). In this study, we report ionospheric measurements related to the hu...
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Article
Analysis of geometry-free residuals in case of traveling ionosphere disturbances and their impact cycle slip detection
We discuss the impact of a traveling ionospheric disturbance (TID) on cycle slip detection for the geometry-free (GF) combination. Based on the GF combination algorithm, we deduce for the first time the comput...