Study of ionospheric irregularities during intense magnetic storms

Rezende, L. F. C.; Paula, E. R. de; Batista, I. S.; Kantor, I. J.; Muella, M. T. A. H.

doi:10.1590/s0102-261x2007000600017

Cited by 20 publications

(1 citation statement)

References 8 publications

(9 reference statements)

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“…É importante destacar que os efeitos na ionosfera brasileira, decorrentes da tempestade geomagnética de 29 de outubro de 2003, já têm sido amplamente estudados por pesquisadores da área da Geofísica Espacial/Aeronomia (exemplos: Sahai et al, 2005;Batista et al, 2006;Abdu et al, 2007;Rezende et al, 2007).…”

Section: Introductionunclassified

Posicionamento por GPS na Região Brasileira Durante a Intensa Tempestade Geomagnética de 29 de Outubro de 2003

2008

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The error due to the ionosphere in the GPS observables depends on the Total Electron Content (TEC) in the ionospheric layer. The TEC varies regularly in time and space in relation to the sunspot number, the season, the local time, the geographic position, and others. However, the TEC can suffer abrupt modifications in its behavior due to the occurrence of intense magnetic storm. On 28 October 2003, at 1110 UT, a major solar flare took place from a sunspot directly in line with the Earth. A coronal mass ejection was observed to leave the Sun in the direction of the Earth, causing an intense magnetic storm that started at 0611 UT of the following day. In this paper, GPS data from RBMC and IGS network and Digisonde data were used, to analyze the influence of the intense magnetic storm that occurred on October 29, 2003 in the behavior of TEC and in the performance of the point positioning in the Brazilian region

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Section: Introductionunclassified

Posicionamento por GPS na Região Brasileira Durante a Intensa Tempestade Geomagnética de 29 de Outubro de 2003

2008

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Impact of equatorial ionospheric irregularities on GNSS receivers using real and synthetic scintillation signals

Ghafoori

Skone

2015

Radio Science

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The impact of L-band equatorial ionospheric scintillation on Global Navigation Satellite Systems (GNSS) receivers is investigated in this paper using both real and synthetic scintillation data. To this end, various low-latitude data sets, recorded during the most recent solar maximum, are exploited in post-processing to develop and verify realistic simulation tools and evaluate GNSS receiver performance. A scintillation simulation model is implemented based on the phase screen formulation of Dr. Charles Rino (1979Rino ( , 1982Rino ( , and 2011) which allows oblique signal propagation in an anisotropic propagation medium with multiple irregularity layers (or phase screens) for multiple GNSS frequencies. The observed real scintillation parameters are used to drive GNSS signal simulations. The subsequent simulated GNSS signal time series are verified through comparison with real data for different signal tracking states including the most severe and challenging tracking scenarios. Using both real and synthetic data sets, the impact of scintillation on observation quality and receiver performance is evaluated in terms of probability of loss of phase and frequency lock, as well as the correlation of disturbed L-band signals transmitted by GNSS satellites on the same transionsopheric path.

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Formation of ionospheric irregularities over Southeast Asia during the 2015 St. Patrick's Day storm

et al. 2016

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We investigate the geospace response to the 2015 St. Patrick's Day storm leveraging on instruments spread over Southeast Asia (SEA), covering a wide longitudinal sector of the low‐latitude ionosphere. A regional characterization of the storm is provided, identifying the peculiarities of ionospheric irregularity formation. The novelties of this work are the characterization in a broad longitudinal range and the methodology relying on the integration of data acquired by Global Navigation Satellite System (GNSS) receivers, magnetometers, ionosondes, and Swarm satellites. This work is a legacy of the project EquatoRial Ionosphere Characterization in Asia (ERICA). ERICA aimed to capture the features of both crests of the equatorial ionospheric anomaly (EIA) and trough (EIT) by means of a dedicated measurement campaign. The campaign lasted from March to October 2015 and was able to observe the ionospheric variability causing effects on radio systems, GNSS in particular. The multiinstrumental and multiparametric observations of the region enabled an in‐depth investigation of the response to the largest geomagnetic storm of the current solar cycle in a region scarcely reported in literature. Our work discusses the comparison between northern and southern crests of the EIA in the SEA region. The observations recorded positive and negative ionospheric storms, spread F conditions, scintillation enhancement and inhibition, and total electron content variability. The ancillary information on the local magnetic field highlights the variety of ionospheric perturbations during the different storm phases. The combined use of ionospheric bottomside, topside, and integrated information points out how the storm affects the F layer altitude and the consequent enhancement/suppression of scintillations.

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Study of ionospheric irregularities during intense magnetic storms

Cited by 20 publications

References 8 publications

Posicionamento por GPS na Região Brasileira Durante a Intensa Tempestade Geomagnética de 29 de Outubro de 2003

Posicionamento por GPS na Região Brasileira Durante a Intensa Tempestade Geomagnética de 29 de Outubro de 2003

Impact of equatorial ionospheric irregularities on GNSS receivers using real and synthetic scintillation signals

Formation of ionospheric irregularities over Southeast Asia during the 2015 St. Patrick's Day storm

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