Détail de l'auteur
Auteur Anthea Coster |
Documents disponibles écrits par cet auteur (3)



There's an app for that : using a smartphone for GNSS ionospheric data collection / Andrew Kennedy in GPS world, vol 27 n° 6 (June 2016)
![]()
[article]
Titre : There's an app for that : using a smartphone for GNSS ionospheric data collection Type de document : Article/Communication Auteurs : Andrew Kennedy, Auteur ; Ryan Kingsbury, Auteur ; Anthea Coster, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 58 - 65 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] acquisition de données
[Termes IGN] Androïd
[Termes IGN] application informatique
[Termes IGN] ionosphère
[Termes IGN] récepteur GNSS
[Termes IGN] téléphone intelligent
[Termes IGN] teneur totale en électronsRésumé : (éditeur) [...] In this month’s column, we take a look at the use of a smartphone app to collect GNSS ionospheric data. Why would you want to do that? In the experience of the developers of the app, GNSS receivers are often characterized by a complex, proprietary data interface that differs for each manufacturer. In practice, this leads to significant investments in understanding interfaces and software tools. Human operators must familiarize themselves with the commands used to configure each receiver as well as with proprietary graphical user interfaces and tools specific to each receiver. The authors’ app-centric approach provides a software framework and output format that remain the same for different receivers. Receiver-specific commands are configurable within the app, so users can easily attach new receivers while reusing the existing infrastructures for data collection and processing. And smartphones have more than enough power and connectivity to do the job and can be easily moved from site to site. The smartphone as a handheld device to help scientists study the ionosphere? Probably not even Clive Sinclair foresaw that. Numéro de notice : A2016-333 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/innovation-theres-an-app-for-that/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80984
in GPS world > vol 27 n° 6 (June 2016) . - pp 58 - 65[article]Monitoring storm-enhanced density using IGS reference station data / Anthea Coster in Journal of geodesy, vol 83 n° 3-4 (March - April 2009)
![]()
[article]
Titre : Monitoring storm-enhanced density using IGS reference station data Type de document : Article/Communication Auteurs : Anthea Coster, Auteur ; S. Skone, Auteur Année de publication : 2009 Article en page(s) : pp 345 - 351 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] GPS en mode différentiel
[Termes IGN] International GNSS Service
[Termes IGN] ionosphère
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] prévention des risques
[Termes IGN] tempête magnétique
[Termes IGN] traitement de données GNSSRésumé : (Auteur) Storm-enhanced density (SED) is a geomagnetic storm phenomenon, characterized by a plume of enhanced total electron content (TEC) that initially moves poleward and sunward extending out from a larger region of enhanced TEC in the mid-latitudes. SED is associated with extreme mid-latitude space weather effects. Sharp gradients in the TEC are found along the borders of SED plumes and at the boundaries of the larger TEC region (the base of the plume). These large TEC gradients can cause significant errors in DGPS and WADGPS positioning and can result in serious consequences for applications such as railway control, highway traffic management, emergency response, commercial aviation and marine navigation, all of which require high precision, real-time positioning. Data from the global IGS network of GPS receivers have enabled the spatial and temporal visualization of these SED plumes, allowing ionospheric researchers to study this phenomenon and investigate the potential for developing prediction techniques and real-time warning systems. GPS TEC maps provided by analysis of the data from the IGS network have now been widely disseminated throughout the atmospheric research community and have become one of the standard means of studying the effects of geomagnetic storms on the ionosphere. These maps have enabled researchers to identify that the SED phenomenon occurs globally, is associated with large TEC gradients (at times greater than 100 TEC units per degree latitude), and is a magnetically conjugate phenomenon. This paper reports on the recent advances in our understanding of the SED phenomenon enabled by GPS observations. Copyright Springer Numéro de notice : A2009-197 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-008-0272-3 En ligne : https://doi.org/10.1007/s00190-008-0272-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29827
in Journal of geodesy > vol 83 n° 3-4 (March - April 2009) . - pp 345 - 351[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-09031 RAB Revue Centre de documentation En réserve L003 Disponible Monitoring the ionosphere with GPS: space weather / Anthea Coster in GPS world, vol 14 n° 5 (May 2003)
[article]
Titre : Monitoring the ionosphere with GPS: space weather Type de document : Article/Communication Auteurs : Anthea Coster, Auteur ; J. Foster, Auteur ; P. Erickson, Auteur Année de publication : 2003 Article en page(s) : pp 42 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] données GPS
[Termes IGN] ionosphère
[Termes IGN] magnétosphère
[Termes IGN] rayonnement ultraviolet
[Termes IGN] surveillance météorologique
[Termes IGN] tempête
[Termes IGN] teneur totale en électronsRésumé : (Auteur) Here on Earth, high winds, heavy rains, deep snow, and other forms of severe weather can disrupt our daily lives. Conditions on the Sun and in the solar wind, magnetosphere, and the ionosphere can also affect our lives through the effects they have on satellites, communications, navigation, and power systems. Scientists are now studying space weather with a wide range of tools to try to learn more about the physical and chemical processes taking place in the upper atmosphere and beyond. One of these tools is GPS. The signals from the GPS satellites travel through the ionosphere on their way to receivers on or near Earth's surface. The free electrons populating this region of the atmosphere affect the propagation of the signals, changing their speed and direction of travel. By processing the data from a dual-frequency GPS receiver, it's actually possible to estimate just how many electrons were encountered by the signal along its travel path - the total electron content (TEC). TEC is the number of electrons in a column with a cross-sectional area of one square meter centered on the signal path. If a regional network of ground-based GPS receivers is used, then a map of TEC above the region can be constructed. The TEC normally varies smoothly from day to night as Earth's dayside atmosphere is ionized by the Sun's extreme ultraviolet radiation, while the nightside ionosphere electron content is reduced by chemical recombination. But the ionosphere can experience stormy weather just as the lower atmosphere does. Smooth variations in TEC are replaced by rapid fluctuations, and some regions experience significantly higher or lower TEC values than normal. In this month's column, we look at how GPS is being used to study such storms and how it is furthering our understanding of the Earth-Sun environment. Numéro de notice : A2003-421 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26501
in GPS world > vol 14 n° 5 (May 2003) . - pp 42 - 49[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 067-03051 RAB Revue Centre de documentation En réserve L003 Disponible