Analysis of GPS phase rate variations in response to geomagnetic field perturbations over the Canadian auroral region

Ghoddousi‐Fard, Reza; Nikitina, Lidia; Danskin, D. W.; Prikryl, P.; Lahaye, F.

doi:10.1016/j.asr.2014.12.021

Cited by 8 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the auroral ionosphere the increasing of the fluctuations intensity followed after the auroral activity was observed (Aarons, 1997;Shagimuratov et al, 2015). The GPS scintillation was observed during events of energetic particle precipitation, substorms and pseudo-breakups in the auroral oval (Skone et al, 2008;Kinrade et al, 2013;Prikryl et al, 2013aPrikryl et al, , 2013b and it was correlated with ground magnetic field disturbances (Ghoddousi-Fard 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

View full text Add to dashboard Cite

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.

show abstract

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

“…In the context of solar wind coupling to the magnetosphere-ionosphere system, it has been shown that GPS phase scintillation is primarily enhanced in the cusp, where a tongue of ionization (TOI) is broken into patches and is drawn into the polar cap from the dayside storm-enhanced plasma density (SED) [Aarons, 1997;Aarons et al, 2000;Basu et al, 1987Basu et al, , 1995Basu et al, , 1998Spogli et al, 2009;Li et al, 2010;Prikryl et al, 2011aPrikryl et al, , 2011bPrikryl et al, , 2014Prikryl et al, , 2015aPrikryl et al, , 2015bMoen et al, 2013;Sreeja and Aquino, 2014;van der Meeren et al, 2014;Jin et al, 2015;Oksavik et al, 2015]. In the auroral oval, GPS scintillation has been observed during energetic particle precipitation events, substorms, and pseudo-breakups [Skone et al, 2008;Kinrade et al, 2013;Prikryl et al, 2013aPrikryl et al, , 2013b and correlated with ground magnetic field perturbations [Skone and Cannon, 1999;Prikryl et al, 2011a;Ghoddousi-Fard et al, 2015]. The present paper focuses on the GPS phase scintillation in relation to the auroral electrojets as observed in the North American and North European sectors during this geomagnetic storm.…”

Section: Introductionmentioning

confidence: 99%

GPS phase scintillation at high latitudes during the geomagnetic storm of 17–18 March 2015

et al. 2016

View full text Add to dashboard Cite

The geomagnetic storm of 17–18 March 2015 was caused by the impacts of a coronal mass ejection and a high‐speed plasma stream from a coronal hole. The high‐latitude ionosphere dynamics is studied using arrays of ground‐based instruments including GPS receivers, HF radars, ionosondes, riometers, and magnetometers. The phase scintillation index is computed for signals sampled at a rate of up to 100 Hz by specialized GPS scintillation receivers supplemented by the phase scintillation proxy index obtained from geodetic‐quality GPS data sampled at 1 Hz. In the context of solar wind coupling to the magnetosphere‐ionosphere system, it is shown that GPS phase scintillation is primarily enhanced in the cusp, the tongue of ionization that is broken into patches drawn into the polar cap from the dayside storm‐enhanced plasma density, and in the auroral oval. In this paper we examine the relation between the scintillation and auroral electrojet currents observed by arrays of ground‐based magnetometers as well as energetic particle precipitation observed by the DMSP satellites. Equivalent ionospheric currents are obtained from ground magnetometer data using the spherical elementary currents systems technique that has been applied over the ground magnetometer networks in North America and North Europe. The GPS phase scintillation is mapped to the poleward side of strong westward electrojet and to the edge of the eastward electrojet region. Also, the scintillation was generally collocated with fluxes of energetic electron precipitation observed by DMSP satellites with the exception of a period of pulsating aurora when only very weak currents were observed.

show abstract

“…Mapped to zenith mean and standard deviation of the rate of the so-called geometry-free GPS dual frequency phase at two consecutive epochs calculated over 30 sec intervals referred here as mDPR and sDPR [2] are used to monitor and detect events of ionospheric irregularities affecting GPS measurements. These indices are found to be well correlated at high latitudes with phase scintillation index from dedicated scintillation receivers [2] and are also responding to geomagnetic field perturbations when compared with collocated magnetic observations [3]. Case studies have shown the link between GPS phase irregularities, high-speed solar wind streams and coronal mass ejections causing geomagnetic storms (see e.g.…”

Section: Characterization Of High Latitiude Ionospheric Gps Phasementioning

confidence: 94%

High latitude ionospheric disturbances: Characterization and effects on GNSS precise point positioning

Ghoddousi‐Fard

Lahaye

2015

2015 International Association of Institutes of Navigation World Congress (IAIN)

Self Cite

View full text Add to dashboard Cite

High latitude ionospheric irregularities of various scale sizes, which are mostly driven by the coupling processes between the solar wind and Earth's magnetic field, frequently result in phase scintillations over auroral oval and polar cap regions. Strong phase scintillations may cause a GNSS receiver to lose track of some satellites in view. Furthermore, rapid fluctuations in the ionospheric electron content may interfere with cycle slip detection and repair algorithms. These can result in degraded GNSS positioning accuracy. Similar to moving receivers, precise epoch solutions for static stations are also crucial for reliable interpretation of position estimates in applications such as earthquake monitoring. Depending on the scale size of the ionospheric irregularities causing phase scintillations, multi constellation GNSS processing can be effective to overcome decreased number of locked satellites. This is also relevant in high latitude regions with the lack of high elevation angle GPS satellites. High rate GPS phase rate measurements are monitored by the Canadian Geodetic Survey of Natural Resources Canada resulting in enhanced understanding of ionospheric irregularities' spatial and temporal characteristics. About 160 globally distributed 1-Hz GPS stations are used in near-real-time to derive inter-frequency phase rate variation statistics. Analysis of these measurements has confirmed that ionospheric GPS phase disturbances are expected at night side of auroral oval and dayside of polar cap. However during geomagnetic storm periods such irregularities can occur during local day time over auroral zone as well as sub-auroral latitudes.This study assesses the effects of ionospheric irregularities, detected through the monitoring system, on GNSS precise point positioning (PPP) estimates. Ionospheric phase scintillation events may results in degraded repeatability in position components processed in kinematic mode. Correlation of repeatability of position estimates of stations in Canadian auroral zone with auroral electrojet (AE) index and solar wind speed are examined.

show abstract

Analysis of GPS phase rate variations in response to geomagnetic field perturbations over the Canadian auroral region

Cited by 8 publications

References 16 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 the geomagnetic storm of 17–18 March 2015

High latitude ionospheric disturbances: Characterization and effects on GNSS precise point positioning

Contact Info

Product

Resources

About