GNSS and SAR Signal Delay in Perturbed Ionospheric D-Region During Solar X-Ray Flares

被引：16

作者：

Nina, Aleksandra ^{[1
]}

Nico, Giovanni ^{[2
,3
]}

Odalovic, Oleg ^{[4
]}

Cadez, Vladimir M. ^{[5
]}

Todorovic Drakul, Miljana ^{[4
]}

Radovanovic, Milan ^{[6
,7
]}

Popovic, Luka C. ^{[5
,8
]}

机构：

[1] Univ Belgrade, Inst Phys Belgrade, Belgrade 11080, Serbia

[2] CNR, Ist Applicazioni Calcolo IAC, I-70126 Bari, Italy

[3] St Petersburg State Univ SPSU, Dept Cartog & Geoinformat, Inst Earth Sci, St Petersburg 199034, Russia

[4] Univ Belgrade, Fac Civil Engn, Dept Geodesy & Geoinformat, Belgrade 11000, Serbia

[5] Astron Observ, Belgrade 11060, Serbia

[6] SASA, Geog Inst Jovan Cvijic, Belgrade 11000, Serbia

[7] South Ural State Univ, Inst Sports Tourism & Serv, Chelyabinsk 454080, Russia

[8] Univ Banja Luka, Fac Sci, Banja Luka 78000, R Srpska, Bosnia & Herceg

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2020年 / 17卷 / 07期

关键词：

Global navigation satellite system; Delays; Synthetic aperture radar; Ionosphere; Perturbation methods; Satellites; Atmospheric modeling; Global navigation satellite systems (GNSS); ionosphere; synthetic aperture radar (SAR) interferometry (InSAR); very-low-frequency (VLF) radio signals; WATER-VAPOR; AMPLITUDE; PHASE; INSAR;

D O I：

10.1109/LGRS.2019.2941643

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We investigate the influence of the perturbed (by a solar X-ray flare) ionospheric D-region on the global navigation satellite systems (GNSS) and synthetic aperture radar (SAR) signals. We calculate a signal delay in the D-region based on the low ionospheric monitoring by very-low-frequency (VLF) radio waves. The results show that the ionospheric delay in the perturbed D-region can be important and, therefore, should be taken into account in modeling the ionospheric influence on the GNSS and SAR signal propagation and in calculations relevant for space geodesy. This conclusion is significant because numerous existing models ignore the impact of this ionospheric part on the GNSS and SAR signals due to its small electron density which is true only in quiet conditions and can result in significant errors in space geodesy during intensive ionospheric disturbances.

引用

页码：1198 / 1202

页数：5

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