Connors, Martin

Danskin, Donald W.

Durgonics, Tibor

G. Thomas, Evan

Ghoddousi-Fard, Reza

Oksavik, Kjellmar

Prikryl, Paul

Ruohoniem, Mike

Thayyil Jayachandran, P.

Weygand, James M.

Zhang, Yongliang

Ionospheric irregularities cause rapid fluctuations of radio wave amplitude and phase that candegrade GPS positional accuracy and affect performance of radio communication and navigation systems. The ionosphere becomes particularly disturbed during geomagnetic storms caused by impacts of coronal mass ejections compounded by high-speed plasma streams from coronal holes. Geomagnetic storm of March 17, 2015 was the largest in the current solar cycle. The high-latitude ionosphere dynamics is studied using arrays of ground-based instruments including GPS receivers, HF radars, ionosondes, riometers and magnetometers. GPS phase scintillation index is computed for L1 signal sampled at the rate of 50 Hz by specialized GPS scintillation receivers of the Expanded Canadian High Arctic Ionospheric Network (ECHAIN). To further extend the geographic coverage, the phasescintillation proxy index is obtained from geodetic-quality GPS data sampled at 1 Hz. In the context of solar wind coupling to the magnetosphere-ionosphere system, it has been demonstrated that GPS phase scintillation is primarily enhanced in the cusp, tongue of ionization (TOI) broken into patches drawn into the polar cap from the dayside storm-enhanced plasma density (SED) and in the auroral oval during energetic particle precipitation events, substorms and pseudo-breakups in particular. In this paper we examine the relation to auroral electrojet currents observed by arrays of ground-based magnetometers and energetic particle precipitation observed by DMSP satellites. Equivalent ionospheric currents (EICs) are obtained from ground magnetometer data using the spherical elementary currents systems (SECS) technique developed by Amm and Viljanen (1999) that has been applied over the entire North American ground magnetometer network by Weygand et al.(2011)

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GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation toauroral electrojet currents - DTU Orbit (08/11/2017) GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currentsIonospheric irregularities cause rapid fluctuations of radio wave amplitude and phase that candegrade GPS positionalaccuracy and affect performance of radio communication and navigation systems. The ionosphere becomes particularlydisturbed during geomagnetic storms caused by impacts of coronal mass ejections compounded by high-speed plasmastreams from coronal holes. Geomagnetic storm of March 17, 2015 was the largest in the current solar cycle. The high-latitude ionosphere dynamics is studied using arrays of ground-based instruments including GPS receivers, HF radars,ionosondes, riometers and magnetometers. GPS phase scintillation index is computed for L1 signal sampled at the rate of50 Hz by specialized GPS scintillation receivers of the Expanded Canadian High Arctic Ionospheric Network (ECHAIN). Tofurther extend the geographic coverage, the phasescintillation proxy index is obtained from geodetic-quality GPS datasampled at 1 Hz. In the context of solar wind coupling to the magnetosphere-ionosphere system, it has beendemonstrated that GPS phase scintillation is primarily enhanced in the cusp, tongue of ionization (TOI) broken intopatches drawn into the polar cap from the dayside storm-enhanced plasma density (SED) and in the auroral oval duringenergetic particle precipitation events, substorms and pseudo-breakups in particular. In this paper we examine the relationto auroral electrojet currents observed by arrays of ground-based magnetometers and energetic particle precipitationobserved by DMSP satellites. Equivalent ionospheric currents (EICs) are obtained from ground magnetometer data usingthe spherical elementary currents systems (SECS) technique developed by Amm and Viljanen (1999) that has beenapplied over the entire North American ground magnetometer network by Weygand et al.(2011). General informationState: PublishedOrganisations: National Space Institute, Geodesy, University of New Brunswick, Natural Resources Canada, AthabascaUniversity, University of California, Los Angeles, Virginia Tech, Johns Hopkins University, University of BergenAuthors: Prikryl, P. (Ekstern), Ghoddousi-Fard, R. (Ekstern), Connors, M. (Ekstern), Weygand, J. M. (Ekstern), Danskin,D. W. (Ekstern), Thayyil Jayachandran, P. (Ekstern), G. Thomas, E. (Ekstern), Ruohoniem, M. (Ekstern), Durgonics, T.(Intern), Oksavik, K. (Ekstern), Zhang, Y. (Ekstern)Number of pages: 1Publication date: 2016Event: Abstract from Japan Geoscience Union Meeting 2016, Chiba-city, Japan.Main Research Area: Technical/natural sciencesSource: PublicationPreSubmissionSource-ID: 120931728Publication: Research - peer-review › Conference abstract for conference – Annual report year: 2016 

GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currents

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GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currents

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