GNSS — Global Navigation Satellite Systems

Hofmann-Wellenhof, Bernhard; Lichtenegger, Herbert; Wasle, Elmar

doi:10.1007/978-3-211-73017-1

Cited by 216 publications

(50 citation statements)

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“…The advantage of GLONASS, as compared to GPS, is that GLONASS has an orbit inclination of~65°that is 10°higher than the GPS orbit inclination [see Hofmann-Wellenhof et al, 2008;ICD GLONASS, 2008;Jeffrey, 2015]. We process and analyze GPS and GLONASS raw measurements provided by a number of regional and global networks of GNSS receivers: the International GNSS Service, the University NAVSTAR Consortium, the Continuously Operating Reference System (CORS), the Scripps Orbit and Permanent Array Center, the EUREF Permanent GNSS network, the Federal Agency for Cartography and Geodesy in Germany, Institut Geographique National in France, the Finnish Reference Network (FGI-FinnRef), the NOANET GNSS Network in Greece, the Natural Resources Canadaˈs Canadian Geodetic Survey, the Canadian High Arctic Ionospheric Network, Red Geodesica Nacional Activa (Instituto Nacional de Estadística y Geografía) in Mexico, the Brazilian Network for Continuous Monitoring (RBMC), and the Red Argentina de Monitoreo Satelital Continuo (RAMSAC CORS).…”

Section: Data and Methods Usedmentioning

confidence: 99%

GPS and GLONASS observations of large‐scale traveling ionospheric disturbances during the 2015 St. Patrick's Day storm

2016

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Using a comprehensive database of ~5300 ground‐based Global Navigation Satellite Systems (GNSS) stations we have investigated large‐scale traveling ionospheric disturbances (LSTIDs) during 17–18 March 2015 (St. Patrick's Day storm). For the first time, the high‐resolution, two‐dimensional maps of the total electron content perturbation were made using not only GPS but also GLONASS measurements. Several LSTIDs originated from the auroral regions in the Northern and Southern Hemispheres were observed simultaneously over Europe, North America, and South America. This storm is considered as a two‐step main phase storm. During the first main phase LSTIDs propagated over the whole daytime European region and over high latitudes of North America. During the second main phase we report (1) intense LSTIDs propagated equatorward in North America and Europe, (2) convergence of several LSTIDs originated from the opposite hemispheres in the interference zone over geomagnetic equator in South America, and (3) “super” LSTIDs with the wavefront length of more than 10,000 km observed simultaneously in North America and Europe. LSTIDs observed in three sectors had wavelength of ~1200–2500 km and wave periods of ~50–80 min. During the recovery phase on the background of the negative ionospheric storm developed over North America we detect signatures of the stream‐like structures elongated within the latitudinal range of 29°N–42°N across the U.S. These structures persisted through the nighttime to the early morning from 04 UT to 13 UT on 18 March 2015, and they were associated with the subauroral polarization stream‐induced nighttime ionospheric flows.

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Section: Data and Methods Usedmentioning

confidence: 99%

GPS and GLONASS observations of large‐scale traveling ionospheric disturbances during the 2015 St. Patrick's Day storm

2016

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“…The dispersive property of the ionosphere makes it possible to estimate TEC from the linear combination of carrier phase and code dual-frequency GNSS measurements (e.g., Calais & Minster, 1995;Hofmann-Wellenhof et al, 2008). TEC is measured in TEC units (TECU), with 1 TECU equal to 10 16 electrons/m 2 .…”

Section: Ionospheric Response To the Sanriku-oki Earthquake Of 9 Marcmentioning

confidence: 99%

Ionospheric GNSS Imagery of Seismic Source: Possibilities, Difficulties, and Challenges

Astafyeva

Shults

2019

JGR Space Physics

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Up to now, the possibility to obtain images of seismic source from ionospheric Global Navigation Satellite Systems (GNSS) measurements ( seismo‐ionospheric imagery ) has only been demonstrated for giant earthquakes with moment magnitude Mw ≥ 9.0. In this work, we discuss difficulties and restrictions of this method, and we apply for the first time the seismo‐ionospheric imagery for smaller earthquakes. The latter is done on the example of the Mw7.4 Sanriku‐oki earthquake of 9 March 2011. Analysis of 1‐Hz data of total electron content (TEC) shows that the first coseismic ionospheric disturbances (CID) occur ~470–480 s after the earthquake as TEC enhancement on the east‐northeast from the epicenter. The location of these first CID arrivals corresponds to the location of the coseismic uplift that is known as the source of tsunamis. Our results confirm that despite several difficulties and limitations, high‐rate ionospheric GNSS data can be used for determining the seismic source parameters for both giant and smaller/moderate earthquakes. In addition to these seismo‐ionospheric applications, we raise several fundamental questions on CID nature and evolution, namely, one of the most challenging queries—can moderate earthquake generate shock‐acoustic waves?

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“…At the moment, the second fully deployed GNSS is the Russian system-GLONASS (GLObal Navigational Satellite System) (see Hofmann-Wellenhof et al 2008;ICD-GLONASS 2008;Jeffrey 2015). The full orbital constellation consists of 24 satellites into three orbit planes.…”

Section: Introductionmentioning

confidence: 99%

New advantages of the combined GPS and GLONASS observations for high-latitude ionospheric irregularities monitoring: case study of June 2015 geomagnetic storm

Cherniak

Zakharenkova

2017

Earth Planets Space

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Monitoring, tracking and nowcasting of the ionospheric plasma density disturbances using dual-frequency measurements of the Global Positioning System (GPS) signals are effectively carried out during several decades. Recent rapid growth and modernization of the ground-based segment gives an opportunity to establish a great database consisting of more than 6000 stations worldwide which provide GPS signals measurements with an open access. Apart of the GPS signals, at least two-third of these stations receive simultaneously signals transmitted by another Global Navigation Satellite System (GNSS)-the Russian system GLONASS. Today, GLONASS signal measurements are mainly used in navigation and geodesy only and very rarely for ionosphere research. We present the first results demonstrating advantages of using several independent but compatible GNSS systems like GPS and GLONASS for improvement of the permanent monitoring of the high-latitude ionospheric irregularities. For the first time, the high-resolution twodimensional maps of ROTI perturbation were made using not only GPS but also GLONASS measurements. We extend the use of the ROTI maps for analyzing ionospheric irregularities distribution. We demonstrate that the meridional slices of the ROTI maps can be effectively used to study the occurrence and temporal evolution of the ionospheric irregularities. The meridional slices of the geographical sectors with a high density of the GPS and GLONASS measurements can represent spatio-temporal dynamics of the intense ionospheric plasma density irregularities with very high resolution, and they can be effectively used for detailed study of the space weather drivers on the processes of the ionospheric irregularities generation, development and their lifetimes. Using a representative database of ~5800 ground-based GNSS stations located worldwide, we have investigated the occurrence of the high-latitude ionospheric plasma density irregularities during the geomagnetic storm of June 22-23, 2015.

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GNSS — Global Navigation Satellite Systems

Cited by 216 publications

References 0 publications

GPS and GLONASS observations of large‐scale traveling ionospheric disturbances during the 2015 St. Patrick's Day storm

GPS and GLONASS observations of large‐scale traveling ionospheric disturbances during the 2015 St. Patrick's Day storm

Ionospheric GNSS Imagery of Seismic Source: Possibilities, Difficulties, and Challenges

New advantages of the combined GPS and GLONASS observations for high-latitude ionospheric irregularities monitoring: case study of June 2015 geomagnetic storm

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