Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2183
AuthorsAlfonsi, Lu.* 
De Franceschi, G.* 
Romano, V.* 
Aquino, M.* 
Dodson, A.* 
TitleGPS positioning errors during the space weather event of October 2003
Issue Date2006
URIhttp://hdl.handle.net/2122/2183
KeywordsGPS
Magnetic
Subject Classification01. Atmosphere::01.03. Magnetosphere::01.03.06. Instruments and techniques 
AbstractDue to the configuration of the Earth’s magnetic field and its reconnection with the Interplanetary Magnetic Field (IMF), the high latitudes ionosphere is directly connected with outer space and, consequently, highly sensitive to the enhancement of the electromagnetic radiation and energetic particles coming from the Sun. Under such conditions the ionosphere may show the presence of small-scale structures or irregularities imbedded in the large-scale ambient plasma. These irregularities can produce short term phase and amplitude fluctuations in the carrier frequency of the radio waves which pass through them, commonly called ionospheric phase and amplitude scintillations. Since September 2003 a GPS Ionospheric Scintillation and TEC Monitor (GISTM) receiver has been deployed at the Italian Arctic station “Dirigibile Italia” in Ny Alesund (79.9° N, 11.9° E, Svalbard, Norway), in the frame of the ISACCO (Ionospheric Scintillations Arctic Campaign Coordinated Observation) project. The receiver computes and records GPS phase and amplitude scintillation parameters, as well as TEC (Total Electron Content). The measurements made by ISACCO during the superstorm of October 2003 have been here used to assess the positioning errors affecting GNSS (Global Navigation Satellite Systems, such as GPS and the European Galileo) users and their correlation with the occurrence of observed levels of scintillation.
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