GPS scintillation in the high arctic associated with an auroral arc

Smith, Andrew M.; Mitchell, Cathryn N.; Watson, Robert J.; Meggs, Robert W.; Kintner, P. M.; Kauristie, K.; Honary, F.

doi:10.1029/2007sw000349

Cited by 68 publications

(52 citation statements)

References 13 publications

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“…The scintillations are more common in the auroral oval during geomagnetic disturbed conditions and were registered close to the noon and the midnight (Spogli et al, 2009;Moen et al, 2013). Some authors found that the strong correlations between the GPS phase scintillation and fluctuations of optical auroral emissions is occurred during investigation of the auroral arcs (Kinrade et al, 2013;Smith et al, 2008). In the auroral ionosphere the increasing of the fluctuations intensity followed after the auroral activity was observed (Aarons, 1997;Shagimuratov et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of TEC fluctuations and GPS positioning errors at different longitudes during auroral disturbances

Шагимуратов¹,

Chernouss²,

Despirak³

et al. 2018

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In this work we analyzed the occurrence of the GPS TEC fluctuations associated with auroral disturbances during the storm on January 7, 2015. The impact of the disturbance on GPS precise positioning were considered. For this purpose, we used the observations of GPS stations located at the European, American and Asian sectors. The auroral activity was determined by data of the IMAGE magnetometers network. The rate of TEC (ROT) used as measure of the TEC fluctuation activity. The intensity fluctuations evaluated by index ROTI. The behavior of fluctuations on different longitudes is very similar. The comparison of substorm activity and the time evolution of the TEC fluctuations showed good consistency. The maximum intensity of TEC fluctuations was observed simultaneously (at the same UT time) over GPS stations which were located at different longitudes. In our work an impact of the geomagnetic disturbances on the Precise Point Positioning (PPP) errors was analyzed. The positioning errors were determined using the GIPSY-OASIS software (APS-NASA). The 3D position errors (P3D) reached the large values (more than 10 m) during storm, while they did not exceed 30 cm during quiet geomagnetic conditions. Our analysis showed the close relation between ROTI and the positioning errors. The positioning errors increased rapidly with increasing of ROTI.

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Section: Introductionmentioning

confidence: 99%

Occurrence of TEC fluctuations and GPS positioning errors at different longitudes during auroral disturbances

Шагимуратов¹,

Chernouss²,

Despirak³

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The phase scintillation is often collocated with bright auroras (Smith et al, 2008Kinrade et al, 2013, fast-drifting irregularities and steep density gradients in the cusp (Prikryl et al, 2011a), and TOI and patches in the polar cap; more recently, weak to moderate scintillation was observed collocated with SAPS at subauroral latitudes (Prikryl et al, 2013b(Prikryl et al, , 2015b. Interhemispheric comparison of high-latitude ionospheric scintillation during geomagnetic storms has revealed similarities as well as asymmetries between the northern and southern auroral zones, cusps and polar caps (Prikryl et al, 2011b, Kinrade et al, 2012Prikryl et al, 2013a).…”

Section: P Prikryl Et Al: Gps Scintillation -Part 2: Interhemisphermentioning

confidence: 99%

GPS phase scintillation at high latitudes during geomagnetic storms of 7–17 March 2012 – Part 2: Interhemispheric comparison

et al. 2015

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Abstract. During the ascending phase of solar cycle 24, a series of interplanetary coronal mass ejections (ICMEs) in the period 7-17 March 2012 caused geomagnetic storms that strongly affected high-latitude ionosphere in the Northern and Southern Hemisphere. GPS phase scintillation was observed at northern and southern high latitudes by arrays of GPS ionospheric scintillation and TEC monitors (GISTMs) and geodetic-quality GPS receivers sampling at 1 Hz. Mapped as a function of magnetic latitude and magnetic local time (MLT), the scintillation was observed in the ionospheric cusp, the tongue of ionization fragmented into patches, sun-aligned arcs in the polar cap, and nightside auroral oval and subauroral latitudes. Complementing a companion paper (Prikryl et al., 2015a) that focuses on the highlatitude ionospheric response to variable solar wind in the North American sector, interhemispheric comparison reveals commonalities as well as differences and asymmetries between the northern and southern high latitudes, as a consequence of the coupling between the solar wind and magnetosphere. The interhemispheric asymmetries are caused by the dawn-dusk component of the interplanetary magnetic field controlling the MLT of the cusp entry of the storm-enhanced density plasma into the polar cap and the orientation relative to the noon-midnight meridian of the tongue of ionization.

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“…One of these concerns the study of the physical processes in the polar region, needed to understand the fundamental aspects of the coupling between the solar wind and the Earth's magnetosphere and ionosphere. The other focuses on the space-related technical applications, as the presence of the ionospheric irregularities can impact variety of trans-ionospheric radio communication and even distort the performance of the global navigation systems (e.g., Smith et al 2008). So, study of morphology and spatio-temporal dynamics of the ionospheric irregularities, their dependences on geophysical factors for proper specification by an empirical model is actual for both fundamental and applied tasks.…”

Section: Introductionmentioning

confidence: 99%

Dependence of the high-latitude plasma irregularities on the auroral activity indices: a case study of 17 March 2015 geomagnetic storm

Cherniak

Zakharenkova

2015

Earth Planet Sp

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The magnetosphere substorm plays a crucial role in the solar wind energy dissipation into the ionosphere. We report on the intensity of the high-latitude ionospheric irregularities during one of the largest storms of the current solar cycle-the St. Patrick's Day storm of 17 March 2015. The database of more than 2500 ground-based Global Positioning System (GPS) receivers was used to estimate the irregularities occurrence and dynamics over the auroral region of the Northern Hemisphere. We analyze the dependence of the GPS-detected ionospheric irregularities on the auroral activity. The development and intensity of the high-latitude irregularities during this geomagnetic storm reveal a high correlation with the auroral hemispheric power and auroral electrojet indices (0.84 and 0.79, respectively). Besides the ionospheric irregularities caused by particle precipitation inside the polar cap region, evidences of other irregularities related to the storm enhanced density (SED), formed at mid-latitudes and its further transportation in the form of tongue of ionization (TOI) towards and across the polar cap, are presented. We highlight the importance accounting contribution of ionospheric irregularities not directly related with particle precipitation in overall irregularities distribution and intensity.

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GPS scintillation in the high arctic associated with an auroral arc

Cited by 68 publications

References 13 publications

Occurrence of TEC fluctuations and GPS positioning errors at different longitudes during auroral disturbances

Occurrence of TEC fluctuations and GPS positioning errors at different longitudes during auroral disturbances

GPS phase scintillation at high latitudes during geomagnetic storms of 7–17 March 2012 – Part 2: Interhemispheric comparison

Dependence of the high-latitude plasma irregularities on the auroral activity indices: a case study of 17 March 2015 geomagnetic storm

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