Geomagnetic storms, super‐storms, and their impacts on GPS‐based navigation systems

Astafyeva, Elvira; Yasyukevich, Yury; Максиков, Алексей; Zhivetiev, I. V.

doi:10.1002/2014sw001072

Cited by 109 publications

(76 citation statements)

References 45 publications

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“…The ROTI characterizes the severity of the GPS phase fluctuations and detects the presence of the ionospheric irregularities, and it measures the irregular structure of the TEC spatial gradient. Today, the ROT/ROTI indices, derived from the ground-based GPS data, are widely used in near real-time services of the space weather monitoring (e.g., SWACI 2016) and in investigations of the ionospheric irregularities occurrence at high-and low-latitude regions (e.g., Aarons and Lin 1999;Ma and Maruyama 2006;Jakowski et al 2012;Astafyeva et al 2014;Cherniak et al 2014;.…”

Section: Methodsmentioning

confidence: 99%

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

2016

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Here we study the global distribution of the plasma density irregularities in the topside ionosphere by using the concurrent GPS and Langmuir probe measurements onboard the Swarm satellites. We analyze 18 months (from August 2014 till January 2016) of data from Swarm A and B satellites that flew at 460 and 510 km altitude, respectively. To identify the occurrence of the ionospheric irregularities, we have analyzed behavior of two indices ROTI and RODI based on the change rate of total electron content and electron density, respectively. The obtained results demonstrate a high degree of similarities in the occurrence pattern of the seasonal and longitudinal distribution of the topside ionospheric irregularities derived from both types of the satellite observations. Among the seasons with good data coverage, the maximal occurrence rates for the post-sunset equatorial irregularities reached 35-50 % for the September 2014 and March 2015 equinoxes and only 10-15 % for the June 2015 solstice. For the equinox seasons the intense plasma density irregularities were more frequently observed in the Atlantic sector, for the December solstice in the South American-Atlantic sector. The highest occurrence rates for the post-midnight irregularities were observed in African longitudinal sector during the September 2014 equinox and June 2015 solstice. The observed differences in SWA and SWB results could be explained by the longitude/LT separation between satellites, as SWB crossed the same post-sunset sector increasingly later than the SWA did.

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Section: Methodsmentioning

confidence: 99%

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

2016

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“…Strong TEC fluctuations can complicate the phase ambiguity resolution and increase the number of the undetected and uncorrected cycle slips and the loss of the signal lock in the GPS navigation and positioning errors (Skone and de Jong, 2000;Kintner et al, 2007;Chernouss, Kalitenkov, 2011;Astafyeva et al, 2014;Jacobsen and Dähnn, 2014).…”

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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“…Besides the storm‐time activity, the third ionization peak was shown to occur under geomagnetically quiet conditions caused by solstice‐time enhanced thermospheric winds [ Valladares , ; Maruyama et al , ]. It should be noted that such intensive and localized density enhancements can cause disruptions in work of radio communication and navigation systems [e.g., Afraimovich et al , ; Rama Rao et al , ; Demyanov et al , ; Astafyeva et al , ; Kelly et al , ]; therefore, study of such effects has an importance for all radio‐communication system users, in addition to the principal fundamental scientific interest.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of the dayside three‐peak density structure in the F₂ and the topside ionosphere

2016

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In this work, we discuss the occurrence of the dayside three‐peak electron density structure in the ionosphere. We first use a set of ground‐based and satellite‐borne instruments to demonstrate the development of a large‐amplitude electron density perturbation at the recovery phase of a moderate storm of 11 October 2008. The perturbation developed in the F2 and low topside ionospheric regions over the American sector; it was concentrated on the north from the equatorial ionization anomaly (EIA) but was clearly separated from it. At the F2 region height, the amplitude of the observed perturbation was comparable or even exceeded that of the EIA. Further analysis of the observational data together with the Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics model simulation results showed that a particular local combination of the thermospheric wind surges provided favorable conditions for the generation of the three‐peak EIA structure. We further proceed with a statistical study of occurrence of the three‐peak density structure in the ionosphere in general. Based on the analysis of 7 years of the in situ data from CHAMP satellite, we found that such three‐peak density structure occurs sufficiently often during geomagnetically quiet time. The third ionization peak develops in the afternoon hours in the summer hemisphere at solstice periods. Based on analysis of several quiet time events, we conclude that during geomagnetically quiet time, the prevailing summer‐to‐winter thermospheric circulation acts in similar manner as the storm‐time enhanced thermospheric winds, playing the decisive role in generation of the third ionization peak in the daytime ionosphere.

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Geomagnetic storms, super‐storms, and their impacts on GPS‐based navigation systems

Cited by 109 publications

References 45 publications

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

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

Occurrence of the dayside three‐peak density structure in the F₂ and the topside ionosphere

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Geomagnetic storms, super‐storms, and their impacts on GPS‐based navigation systems

Cited by 109 publications

References 45 publications

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphere

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

Occurrence of the dayside three‐peak density structure in the F2 and the topside ionosphere

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Occurrence of the dayside three‐peak density structure in the F₂ and the topside ionosphere