Signature of ionospheric irregularities under different geophysical conditions on SBAS performance in the western African low-latitude region

被引：12

作者：

Abe, Oladipo Emmanuel ^{[1
,2
]}

Villamide, Xurxo Otero ^{[1
]}

Paparini, Claudia ^{[1
]}

Ngaya, Rodrigue Herbert ^{[1
]}

Radicella, Sandro M. ^{[1
]}

Nava, Bruno ^{[1
]}

机构：

[1] Abdus Salam Int Ctr Theoret Phys ICTP, Trieste, Italy

[2] Fed Univ Oye Ekiti, Dept Phys, Oye Ekiti, Ekiti State, Nigeria

来源：

ANNALES GEOPHYSICAE | 2017年 / 35卷 / 01期

关键词：

Radio science; space and satellite communication; EQUATORIAL-SPREAD-F; L-BAND SCINTILLATIONS; DRIFT;

D O I：

10.5194/angeo-35-1-2017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Rate of change of TEC (ROT) and its index (ROTI) are considered a good proxy to characterize the occurrence of ionospheric plasma irregularities like those observed after sunset at low latitudes. SBASs (satellite-based augmentation systems) are civil aviation systems that provide wide-area or regional improvement to single-frequency satellite navigation using GNSS (Global Navigation Satellite System) constellations. Plasma irregularities in the path of the GNSS signal after sunset cause severe phase fluctuations and loss of locks of the signals in GNSS receiver at low-latitude regions. ROTI is used in this paper to characterize plasma density ionospheric irregularities in central-western Africa under nominal and disturbed conditions and identified some days of irregularity inhibition. A specific low-latitude algorithm is used to emulate potential possible SBAS message using real GNSS data in the western African low-latitude region. The performance of a possible SBAS operation in the region under different ionospheric conditions is analysed. These conditions include effects of geomagnetic disturbed periods when SBAS performance appears to be enhanced due to ionospheric irregularity inhibition. The results of this paper could contribute to a feasibility assessment of a European Geostationary Navigation Overlay System-based SBAS in the sub-Saharan African region.

引用

页码：1 / 9

页数：9

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