UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 17:48

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Atomic and Molecular Physics. Astrophysics. Applications


Title:
Local Ionospheric Scintillations Above Romania


Authors:
Andrei Ieronim CONSTANTINESCU (1,2), Eugeniu Mihnea POPESCU (1), Ana CARAMETE (1), Gabriel CHIRIȚOI (1), Florin Ioan CONSTANTIN (1,2), Eduard NĂSTASE (3), Alexandra MUNTEAN (3)


Affiliation:
1) Institute of Space Science, Măgurele, Romania

2) University of Bucharest, Faculty of Physics, Măgurele, Romania

3) National Institute for Earth Physics, Măgurele, Romania



E-mail
aiconstantinescu@spacescience.ro


Keywords:
Ionosphere, scintillations, GNSS, space weather


Abstract:
Radio signals coming from the Global Navigation Satellite Systems (GPS, GLONASS, BeiDou and Galileo) may suffer rapid and intensive fluctuations in amplitude and phase as they pass through the small‐scale plasma density irregularities in the ionosphere, on their way to ground receiving stations. These fluctuations are called radio scintillations and they are described by two indices, namely S4, representing the amplitude fluctuation and σφ, representing the phase fluctuation of a GNSS signal received by a ground station. It is essential to permanently monitor these scintillations, as they can seriously alter the satellite signal transmission, leading to poor communication between the satellites and ground stations or even permanent loss of the satellite signal lock. This presentation describes our current work on computing the S4 and σφ indices using GPS data in RINEX format provided by ground stations located across the territory of Romania.


References:

[1] Ouassou, Mohammed & Kristiansen, Oddgeir & G. O. Gjevestad, Jon & Jacobsen, Knut & Andalsvik, Yngvild, “Estimation of Scintillation Indices: A Novel Approach Based on Local Kernel Regression Methods”, International Journal of Navigation and Observation, 1-18, 10.1155/2016/3582176(2016).

[2] Shanmugam, Surendran & Jones, Jason & MacAulay, Allan & J. Van Dierendonck, A, “Evolution to modernized GNSS ionoshperic scintillation and TEC monitoring”, Record - IEEE PLANS, Position Location and Navigation Symposium, 265-273, 10.1109/PLANS.2012.6236891(2012)

[3] „RINEX – The Receiver Independent Exchange Format Version 3.03”, International GNSS Service (IGS), RINEX Working Group and Radio Technical Commission for Maritime Services Special Committee 104 (RTCM-SC104), 14 iulie (2015)



Acknowledgement:
This work was supported by a grant of the Romanian Ministery of Research and Innovation, CCCDI - UEFISCDI, project number PN-III-P1-1.2-PCCDI-2017-0266/16PCCDI/2018, within PNCDI III.