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http://hdl.handle.net/2122/14691
Authors: | Spogli, Luca* Ghobadi, Hossein* Cicone, Antonio* Alfonsi, Lucilla* Cesaroni, Claudio* Linty, Nicola* Romano, Vincenzo* Cafaro, Massimo* |
Title: | Adaptive Phase Detrending for GNSS Scintillation Detection: A Case Study Over Antarctica | Journal: | IEEE Geoscience and Remote Sensing Letters | Series/Report no.: | /19 (2021) | Publisher: | IEEE | Issue Date: | 2021 | DOI: | 10.1109/LGRS.2021.3067727 | URL: | https://ieeexplore.ieee.org/document/9394424 | Abstract: | We aim at contributing to the reliability of the phase scintillation index on Global Navigation Satellite System (GNSS) signals at high-latitude. To the scope, we leverage on a recently introduced detrending scheme based on the signal decomposition provided by the fast iterative filtering (FIF) technique. This detrending scheme has been demonstrated to enable a fine-tuning of the cutoff frequency for phase detrending used in the phase scintillation index definition. In a single case study based on Galileo data taken by a GNSS ionospheric scintillation monitor receiver (ISMR) in Concordia Station (Antarctica), we investigate how to step ahead of the cutoff frequency optimization. We show how the FIF-based detrending allows deriving adaptive cutoff frequencies, whose value changes minute-by-minute. They are found to range between 0.4 and 1.2 Hz. This allows better accounting for diffractive effects in phase scintillation index calculation and provides a GNSS-based estimation of the relative velocity between satellite and ionospheric irregularities. |
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2021_Spogli_et_al_MinuteCutoffFrequency_GRSL.pdf | Open Access | 1.06 MB | Adobe PDF | View/Open |
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