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A-GNSS: a different approach / Isabelle Kraemer in Inside GNSS, vol 4 n° 5 (September - October 2009) 

Public [article]  inInside GNSS > vol 4 n° 5 (September - October 2009) . - 10 p. ; pp 52 - 61 Titre : A-GNSS: a different approach Type de document : Article/Communication Auteurs : Isabelle Kraemer, Auteur ; Bernd Eissfeller, Auteur Année de publication : 2009 Article en page(s) : 10 p. ; pp 52 - 61 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] Bluetooth [Termes IGN] filtre de Kalman [Termes IGN] GPS assisté pour la navigation (technologies) [Termes IGN] navigation à l'estime [Termes IGN] positionnement en intérieur [Termes IGN] positionnement par GNSS Résumé : (Auteur) More and more mobile devices are integrating GNSS technology — and this increases the pressure to improve positioning capabilities in difficult environments. In this column, the authors introduce a novel use of peer-to-peer transfer of position information that combines GNSS and dead-reckoning techniques with Bluetooth communications to assist positioning indoors. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-666 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33557 [article]

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Remote sensing with reflected signals: GNSS-R data processing software and test analysis / D. Yang in Inside GNSS, vol 4 n° 5 (September - October 2009) 

Public [article]  inInside GNSS > vol 4 n° 5 (September - October 2009) . - 6 p. ; pp 40 - 45 Titre : Remote sensing with reflected signals: GNSS-R data processing software and test analysis Type de document : Article/Communication Auteurs : D. Yang, Auteur ; Y. Zhou, Auteur ; Y. Wang, Auteur Année de publication : 2009 Article en page(s) : 6 p. ; pp 40 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] bande L [Termes IGN] humidité du sol [Termes IGN] mer [Termes IGN] prairie [Termes IGN] réflexion (rayonnement) [Termes IGN] signal GNSS [Termes IGN] signal GPS [Termes IGN] télédétection aérienne Résumé : (Auteur) Authors from a leading Chinese university describe how reflected GNSS signals can be used in sea-wind retrieval, seawater salinity detection, ice-layer density measurement and other remote sensing applications. They introduce the GNSS-R concept, demonstrate the characteristics of the GPS reflected signal, and describe their data-processing method for exploiting the reflected signals. The article includes test results from field trials gathering data over maritime and grassland areas. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-667 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33558 [article]

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Signal authentication: a secure civil GNSS for today / S. Lo in Inside GNSS, vol 4 n° 5 (September - October 2009) 

Public [article]  inInside GNSS > vol 4 n° 5 (September - October 2009) . - 10 p. ; pp 30 - 39 Titre : Signal authentication: a secure civil GNSS for today Type de document : Article/Communication Auteurs : S. Lo, Auteur ; D. De Lorenzo, Auteur ; P. Enge, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : 10 p. ; pp 30 - 39 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] anti-leurrage [Termes IGN] architecture de système [Termes IGN] authentification [Termes IGN] brouillage [Termes IGN] interférence [Termes IGN] leurrage [Termes IGN] positionnement par GNSS [Termes IGN] sécurité [Termes IGN] signal GPS [Termes IGN] utilisateur civil Résumé : (Auteur) Many civil GNSS applications need secure, assured information for asset tracking, fleet management and the like. But there is also a growing demand for geosecurity location-based services such as hardware configuration and management, virtual site licenses, digital rights management and geofencing. Unfortunately, GNSS is vulnerable to malicious intrusion and spoofing. How can users be sure the information they receive is authentic? This article introduces a new method that uses hidden attributes fundamental to the GPS satellite broadcast — and cross-compared between two receivers — to authenticate signals and the location solutions they generate. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-668 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33560 [article]

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The soft approach: a recipe for a multi-system, multi-frequency GNSS receiver / Cillian O'Driscoll in Inside GNSS, vol 4 n° 5 (September - October 2009) 

Public [article]  inInside GNSS > vol 4 n° 5 (September - October 2009) . - 6 p. ; pp 46 - 51 Titre : The soft approach: a recipe for a multi-system, multi-frequency GNSS receiver Type de document : Article/Communication Auteurs : Cillian O'Driscoll, Auteur ; Daniele Borio, Auteur ; Mark Petovello, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : 6 p. ; pp 46 - 51 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] application informatique [Termes IGN] récepteur GNSS Résumé : (Auteur) PC-based software GNSS receivers, which have served as powerful research tools for many years, are beginning to find applications outside the laboratory — in such areas as atmospheric modeling and synthetic aperture radar. The article describes the design of a multi-channel software receiver developed by the University of Calgary — challenges, trade-offs, results, and plans for further capabilities. A sidebar describes how the PLAN software receiver worked as a signal-monitoring tool to analyze the L5 signal broadcast by GPS satellite SVN 49. [summary] The modular design adapted for PLAN's software receiver greatly facilitates research in many areas of GNSS signal and navigation processing. The ability to quickly add new signals, new systems, and new signal processing techniques was a fundamental goal of the design process, and the success of this approach has been demonstrated through a number of examples. A common misconception suggests that a software receiver designed entirely in C++ would be too cumbersome and slow to operate in real time. On the contrary, the PLAN receiver can operate in real-time with up to 12 channels at sampling rates of over 16 Msps. Much research and development work remains to be done, even within the constraints of the software receiver as defined in Figure 2, and certainly a whole world of possibility exists beyond this specific definition. Signal quality monitoring, high-sensitivity operation, atmospheric modelling, and synthetic aperture radar applications are only a few of the potential further uses of the software receiver. We also recently commenced development of a graphical user interface (GUI) to replace the current console interface. Although this development does not contribute directly to the research goals of the PLAN group, the ability to visualize receiver data at run-time can be very useful for quick identification of interesting phenomena, such as RF interference. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-669 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33561 [article]

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