Abstract
Satellite navigation is a global utility and an essential component of national infrastructure. Disruptions of GNSS PNT services may be considered a threat to society and civilisation in general. Natural hazards may cause the conditions that disrupt or temporarily deny GNSS PNT services. As a contributor to ionospheric dynamics, volcanic activity is considered a source of GNSS positioning performance degradation. Here we studied the 2011 Puyehue-Cordon Caulle event, the largest 21st century volcanic eruption so far, in terms of its contribution to formation of Total Electron Content (TEC), the source of ionosphere-caused GNSS positioning error, and the effects the event made on GPS positioning accuracy. TEC values were derived from dual-frequency GPS observations collected experimentally at the International GNSS Service Network reference stations in Santiago, central Chile closest to the Puyehue-Cordon Caulle volcano. We identified considerable anomalous behaviour of TEC dynamics prior to, during and after the volcanic eruption, and examined the extent to which it affected GPS positioning accuracy. The research presented here will continue with the aim of characterisation of TEC anomalous dynamics around the eruption, and its effects on GNSS positioning performance.
Highlights
Proliferation of satellite navigation technology requires stable and robust Global Navigation Satellite System (GNSS) positioning performance for numerous GNSSbased technology and socio-economic systems and services
Resulting from much wider space weather disturbances [2], [3], the ionospheric effects on GNSS positioning performance may be caused by the other terrestrial natural sources of additional ionisation in the Earth’s atmosphere, including earthquakes and volcanic eruptions [4], [5], [6]
We studied the problem through examination of ionospheric conditions deterioration, and GNSS positioning performance degradation during the 2011 Puyehue-Cordon Caulle volcanic eruption, the largest volcanic eruption in the XXI
Summary
Proliferation of satellite navigation technology requires stable and robust Global Navigation Satellite System (GNSS) positioning performance for numerous GNSSbased technology and socio-economic systems and services. Ionospheric effects are the most prominent single cause of GNSS positioning performance degradation and even disruptions of GNSS Positioning, Navigation, and Timing (PNT) services [1]. Resulting from much wider space weather disturbances [2], [3], the ionospheric effects on GNSS positioning performance may be caused by the other terrestrial natural sources of additional ionisation in the Earth’s atmosphere, including earthquakes and volcanic eruptions [4], [5], [6]. We studied the problem through examination of ionospheric conditions deterioration, and GNSS positioning performance degradation during the 2011 Puyehue-Cordon Caulle volcanic eruption, the largest volcanic eruption in the XXI.
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