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Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24

Kriegel, Martin and Jakowski, Norbert and Berdermann, Jens and Sato, Hiroatsu and Wassaie Mersha, Mogese (2017) Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24. Annales Geophysicae. Copernicus Publications. ISSN 0992-7689

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Abstract

Small-scale ionospheric disturbances may cause severe radio scintillations of signals transmitted from global navigation satellite systems (GNSSs). Consequently, small-scale plasma irregularities may heavily degrade the performance of current GNSSs such as GPS, GLONASS or Galileo. This paper presents analysis results obtained primarily from two high-rate GNSS receiver stations designed and operated by the German Aerospace Center (DLR) in cooperation with Bahir Dar University (BDU) at 11.6° N, 37.4° E. Both receivers collect raw data sampled at up to 50 Hz, from which characteristic scintillation parameters such as the S4 index are deduced. This paper gives a first overview of the measurement set-up and the observed scintillation events over Bahir Dar in 2015. Both stations are located close to one another and aligned in an east–west, direction which allows us to estimate the zonal drift velocity and spatial dimension of equatorial ionospheric plasma irregularities. Therefore, the lag times of moving electron density irregularities and scintillation patterns are derived by applying cross-correlation analysis to high-rate measurements of the slant total electron content (sTEC) along radio links between a GPS satellite and both receivers and to the associated signal power, respectively. Finally, the drift velocity is derived from the estimated lag time, taking into account the geometric constellation of both receiving antennas and the observed GPS satellites.

Item URL in elib:https://elib.dlr.de/110691/
Document Type:Article
Title:Scintillation measurements at Bahir Dar during the high solar activity phase of solar cycle 24
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kriegel, MartinMartin.Kriegel (at) dlr.dehttps://orcid.org/0000-0001-5543-180X
Jakowski, NorbertNorbert.Jakowski (at) dlr.deUNSPECIFIED
Berdermann, JensJens.Berdermann (at) dlr.dehttps://orcid.org/0000-0002-3308-4584
Sato, HiroatsuHiroatsu.Sato (at) dlr.deUNSPECIFIED
Wassaie Mersha, MogeseMogese.WassaieMersha (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:Copernicus Publications
ISSN:0992-7689
Status:Published
Keywords:ionosphere, scintillation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation
Deposited By: Kriegel, Martin
Deposited On:14 Feb 2017 16:48
Last Modified:08 Mar 2018 18:47

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