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Climatology of High and Low Latitude Scintillation in the Last Solar Cycle by Means of the Geodetic Detrending Technique

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10.33012/2020.17187
 
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hdl:2117/334526

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Rovira Garcia, AdriàMés informacióMés informacióMés informació
González Casado, GuillermoMés informacióMés informacióMés informació
Juan Zornoza, José MiguelMés informacióMés informacióMés informació
Sanz Subirana, JaumeMés informacióMés informacióMés informació
Orús Pérez, Raul
Document typeConference report
Defense date2020
PublisherION Publications (The Institute of navigation)
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
ProjectDESARROLLO DE UN SISTEMA INTEGRADO DE NAVEGACION POR SATELITE Y NAVEGACION INERCIAL PARA LA NAVEGACION AUTONOMA DE VEHICULOS A ESCALA MUNDIAL (AEI-RTI2018-094295-B-I00)
Abstract
Signals from a Global Navigation Satellite System (GNSS) can be disturbed along the propagation ray path from the satellites to the receivers. The presence of irregularities in the electron density in the near-Earth space environment can cause refraction and/or diffraction in the electromagnetic signals used by GNSS. This causes fast fluctuations of the GNSS signals known as scintillation. Currently, specialized Ionospheric Scintillation Monitoring Receivers (ISMRs) are used to characterize the intensity (or amplitude) and the phase scintillation. ISMRS are capable of sampling GNSS carrier-phase measurements at high-rate (e.g. 50 to 100 Hz) and must be equipped with a highly stable clock. In contrast, the present contribution studies the climatology of scintillation at high- and low- latitudes for both hemispheres and for a long temporal series, with measurements gathered by conventional geodetic receivers with a sampling frequency of 1 Hz that belong to the International GNSS Service (IGS) network. The derivation of S4 (amplitude scintillation) and ?? (phase scintillation) parameters uses a novel technique based in a precise Geodetic Detrending (GD) of the carrier-phase measurements, as in Precise Point Positioning (PPP). Amplitude and phase scintillation have been statistically characterized by means of the cumulative distribution functions (CDF) of S4 and ?? parameters. The thresholds for moderate and intense scintillation periods are established from the 99% and 99.9% percentiles of the CDFs as 0.25 and 0.45 for ?? values and 0.3 and 0.5 for S4 values, respectively. The large temporal series analyzed allows relating high-activity periods to severe space weather events such as geomagnetic storms at high-latitudes, to local times from 19h to midnight at low-latitudes and studying the seasonal dependencies. We conclude that the GD method is a powerful tool to perform scintillation studies and that it can be applied to individual (i.e. uncombined) signal frequencies.
CitationRovira-Garcia, A. [et al.]. Climatology of High and Low Latitude Scintillation in the Last Solar Cycle by Means of the Geodetic Detrending Technique. A: International Technical Meeting. "Proceedings of the 2020 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2020". Manassas, Virginia: ION Publications (The Institute of navigation), 2020, p. 920-933. ISBN 0-936406-24-0. DOI 10.33012/2020.17187. 
URIhttp://hdl.handle.net/2117/334526
DOI10.33012/2020.17187
ISBN0-936406-24-0
Publisher versionhttps://www.ion.org/publications/abstract.cfm?articleID=17187
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  • Departament de Física - Ponències/Comunicacions de congressos [649]
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  • Departament de Matemàtiques - Ponències/Comunicacions de congressos [1.057]
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