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Getting There by Tuning In: Using HD Radio Signals for Navigation / Ananta Vidyarthi in GPS world, vol 26 n° 9 (September 2015)  

Public [article]  inGPS world > vol 26 n° 9 (September 2015) . - pp Titre : Getting There by Tuning In: Using HD Radio Signals for Navigation Type de document : Article/Communication Auteurs : Ananta Vidyarthi, Auteur ; H. Howard Fan, Auteur ; Stewart DeVilbiss, Auteur Année de publication : 2015 Article en page(s) : pp Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes descripteurs IGN] GNSS assisté pour la navigation [Termes descripteurs IGN] modulation d'amplitude [Termes descripteurs IGN] onde radioélectrique [Termes descripteurs IGN] signal GNSS Résumé : (éditeur) In this month’s column, our authors tell us about some extensive simulation work they have carried out to demonstrate the feasibility of using digital radio signals for navigation. In the future, you may be able to turn on your radio and tune in to get to where you’re going. Numéro de notice : A2015-494 Thématique : POSITIONNEMENT Nature : Article En ligne : http://gpsworld.com/innovation-getting-there-by-tuning-in/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77304 [article]

Positioning in challenging environments using ultra-wideband sensor networks / Zoltan Koppanyi in GPS world, vol 26 n° 3 (March 2015)  

Public [article]  inGPS world > vol 26 n° 3 (March 2015) Titre : Positioning in challenging environments using ultra-wideband sensor networks Type de document : Article/Communication Auteurs : Zoltan Koppanyi, Auteur ; Charles K. Toth, Auteur ; Dorota A. Grejner-Brzezinska, Auteur Année de publication : 2015 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes descripteurs IGN] GNSS assisté pour la navigation [Termes descripteurs IGN] onde radioélectrique [Termes descripteurs IGN] positionnement en intérieur [Termes descripteurs IGN] réseau de capteurs Résumé : (auteur) [...] Conventional radio transmissions use a variety of modulation techniques but most involve varying the amplitude, frequency and/or phase of a sinusoidal carrier wave. But in the late 1960s, it was shown that one could generate a signal as a sequence of very short pulses, which results in the signal energy being spread over a large part of the radio spectrum. Initially called pulse radio, the technique has become known as impulse radio ultra-wideband or just ultra-wideband (UWB) for short and by the 1990s a variety of practical transmission and reception technologies had been developed. The use of large transmission bandwidths offers a number of benefits, including accurate ranging and that application in particular is being actively developed for positioning and navigation in environments that are challenging to GNSS such as indoors and built-up areas. In this month’s column, we take a look at the work being carried out in this area by a team of researchers at The Ohio State University. Numéro de notice : A2015-265 Thématique : POSITIONNEMENT/SOCIETE NUMERIQUE Nature : Article En ligne : http://gpsworld.com/innovation-where-are-we/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76315 [article]

Essential astrophysics / Kenneth R. Lang (2013)  

Public Titre : Essential astrophysics Type de document : Monographie Auteurs : Kenneth R. Lang, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2013 Importance : 657 p. ISBN/ISSN/EAN : 978-3-642-35963-7 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Astrophysique [Termes descripteurs IGN] champ de pesanteur terrestre [Termes descripteurs IGN] champ électromagnétique [Termes descripteurs IGN] étoile [Termes descripteurs IGN] force de gravitation [Termes descripteurs IGN] loi de Képler [Termes descripteurs IGN] marée lunaire [Termes descripteurs IGN] marée terrestre [Termes descripteurs IGN] neutron [Termes descripteurs IGN] onde radioélectrique [Termes descripteurs IGN] proton [Termes descripteurs IGN] rayonnement solaire [Termes descripteurs IGN] rotation de la Terre [Termes descripteurs IGN] SYSTEME STELLAIRE [Termes descripteurs IGN] téléscope [Termes descripteurs IGN] trou noir Résumé : (éditeur) Essential Astrophysics is a book to learn or teach from, as well as a fundamental reference volume for anyone interested in astronomy and astrophysics. It presents astrophysics from basic principles without requiring any previous study of astronomy or astrophysics. It serves as a comprehensive introductory text, which takes the student through the field of astrophysics in lecture-sized chapters of basic physical principles applied to the cosmos. This one-semester overview will be enjoyed by undergraduate students with an interest in the physical sciences, such as astronomy, chemistry, engineering or physics, as well as by any curious student interested in learning about our celestial science. The mathematics required for understanding the text is on the level of simple algebra, for that is all that is needed to describe the fundamental principles. The text is of sufficient breadth and depth to prepare the interested student for more advanced specialised courses in the future. Astronomical examples are provided throughout the text, to reinforce the basic concepts and physics, and to demonstrate the use of the relevant formulae. In this way, the student learns to apply the fundamental equations and principles to cosmic objects and situations. Astronomical and physical constants and units as well as the most fundamental equations can be found in the appendix. Essential Astrophysics goes beyond the typical textbook by including references to the seminal papers in the field, with further reference to recent applications, results, or specialised literature. Note de contenu : 1- Observing the Universe 2- Radiation 3- Gravity 4- Cosmic Motion 5- Moving Particles 6- Detecting Atoms in Stars 7- Transmutation of the Elements 8- What Makes the Sun Shine? 9- The Extended Solar Atmosphere 10- The Sun Amongst the Stars 11- The Material Between the Stars 12- Formation of the Stars and Their Planets 13- Stellar End States 14- A Larger, Expanding Universe 15- Origin, Evolution, and Destiny of the Observable Universe Numéro de notice : 25760 Thématique : POSITIONNEMENT Nature : Monographie En ligne : https://doi.org/10.1007/978-3-642-35963-7 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94955

Indoor positioning technologies / R. Mautz (2012)    

Public Titre : Indoor positioning technologies Type de document : Thèse/HDR Auteurs : R. Mautz, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2012 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 86 Importance : 122 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-31-4 Note générale : Bibliographie Habilitation Thesis Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes descripteurs IGN] analyse comparative [Termes descripteurs IGN] caméra vidéo [Termes descripteurs IGN] GNSS assisté pour la navigation [Termes descripteurs IGN] GNSS-INS [Termes descripteurs IGN] navigation inertielle [Termes descripteurs IGN] onde radioélectrique [Termes descripteurs IGN] positionnement en intérieur [Termes descripteurs IGN] précision métrique [Termes descripteurs IGN] pseudolite [Termes descripteurs IGN] rayonnement infrarouge [Termes descripteurs IGN] réseau local sans fil Résumé : (Auteur) In the age has of automation the ability to navigate persons and devices in indoor environments has become increasingly important for a rising number of applications. With the emergence of global satellite positioning systems, the performance of outdoor positioning has become excellent, but many mass market applications require seamless positioning capabilities in all environments. Therefore indoor positioning has become a focus of research and development during the past decade. It has by now become apparent that there is no overall solution based on a single technology, such as that provided outdoors by satellite-based navigation. We are still far away from achieving cheap provision of global indoor positioning with an accuracy of 1 meter. Current systems require dedicated local infrastructure and customized mobile units. As a result, the requirements for every application must be analyzed separately to provide an individually tailored solution. Therefore it is important to assess the performance parameters of all technologies capable of indoor positioning and match them with the user requirements which have to be described precisely for each application. Such descriptions must be based on a market analysis where the requirements parameters need to be carefully weighed against each other. The number of relevant requirements parameters is large (e.g. accuracy, coverage, integrity, availability, update rate, latency, costs, infrastructure, privacy, approval, robustness, intrusiveness etc.). But also the diversity of different technologies is large, making it a complex process to match a suitable technology with an application. At the highest level, all technologies can be divided into categories employing three different physical principles: inertial navigation (accelerometers and gyroscopes maintaining angular momentum), mechanical waves (i.e. audible and ultra-sound) and electromagnetic waves (i.e. using the visible, infrared, microwave and radio spectrum). Systems making use of the radio spectrum include FM radios, radars, cellular networks, DECT phones, WLAN, ZigBee RFID, ultra-wideband, high sensitives GNSS and pseudolite systems. This thesis categorizes all sighted indoor positioning approaches into 13 distinct technologies and describes the measuring principles of each. Individual approaches are characterized and key performance parameters are quantified. For a better overview, these parameters are briefly compared in table form for each technology. Note de contenu : 1 Introduction 1.1 Motivation 1.2 Previous Surveys 1.3 Overview of Technologies 1.4 Indoor Positioning Applications 1.5 Structure of this Work 2 User 2.1 Requirements Parameters Overview 2.2 Positioning Requirements Parameters Definition 2.3 Man Machine Interface Requirements 2.4 Security and Privacy Requirements 2.5 Costs 2.6 Generic Derivation of User Requirements. 2.7 Requirements for Selected Indoor Applications 3 Definition of Terms 3.1 Disambiguation of Terms for Positioning 3.2 Definition of Technical Terms 3.3 The Basic Measuring Principles 3.4 Positioning Methods 4 Cameras 4.1 Reference from 3D Building Models 4.2 Reference from Images 4.3 Reference from Deployed Coded Targets 4.4 Reference from Projected Targets 4.5 Systems without Reference 4.6 Reference from Other Sensors 4.7 Summary on Camera Based Indoor Positioning Systems 5 Infrared 5.1 Active Beacons 5.2 Imaging of Natural Infrared Radiation 5.3 Imaging of Artificial Infrared Light 5.4 Summary on Infrared Indoor Positioning Systems 6 Tactile and Combined Polar Systems 6.1 Tactile Systems 6.2 Combined Polar Systems 6.3 Summary on Tactile and Combined Polar Systems 7 Sound 7.1 Ultrasound 7.2 Audible Sound 7.3 Summary on Sound Systems 8 WLAN / Wi-Fi 8.1 Propagation Modeling 8.2 Cell of Origin 8.3 Empirical Fingerprinting 8.4 WLAN Distance Based Methods (PathlossBased Positioning) 8.5 Summary on WLAN Systems 9 Radio Frequency Identification 9.1 Active RFID 9.2 Passive RFID 9.3 Summary on RFID Systems 10 Ultra-Wideband 10.1 Range Estimation Using UWB 10.2 Multipath Mitigation Using UWB 10.3 Positioning Methods Using UWB 10.4 Commercial UWB Systems 10.5 Summary on UltraWideband Systems 11 High Sensitive GNSS / Assisted GNSS 11.1 Signal Attenuation 11.2 Assisted GNSS 11.3 Long Integration and Parallel Correlation 11.4 Summary on High Sensitive GNSS 12 Pseudolites 12.1 Pseudolites Using Signals Different to GNSS 12.2 GNSS Repeaters 12.3 Summary on Pseudolite Systems 13 Other Radio Frequency Technologies 13.1 ZigBee 13.2 Bluetooth 13.3 DECT Phones 13.4 Digital Television 13.5 Cellular Networks 13.6 Radar 13.7 FM Radio 13.8 Summary on Radio Systems 14 Inertial Navigation Systems 14.1 INS Navigation without External Infrastructure 14.2 Pedestrian Dead Reckoning 14.3 INS Pedestrian Navigation Using Complementary Sensors 14.4 Foot Mounted Pedestrian Navigation 14.5 Summary on INS Based Systems 15 Magnetic Localization 15.1 Systems Using the Antenna Near Field 15.2 Systems Using Magnetic Fields from Currents 15.3 Systems Using Permanent Magnets 15.4 Systems Using Magnetic Fingerprinting 15.5 Summary on Magnetic Localization 16 Infrastructure Systems 16.1 Power Lines 16.2 Floor Tiles 16.3 Fluorescent Lamps 16.4 Leaky Feeder Cables 16.5 Summary on Infrastructure Systems 17 Concluding Remarks 17.1 Conclusion 17.2 Outlook Numéro de notice : 15548 Thématique : POSITIONNEMENT Nature : Monographie DOI : 10.3929/ethz-a-007313554 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-86.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62760

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Cartographie de l'exposition aux champs radioélectriques / Françoise de Blomac in SIG la lettre, n° 120 (octobre 2010)

Public [article]  inSIG la lettre > n° 120 (octobre 2010) . - pp 12 - 13 Titre : Cartographie de l'exposition aux champs radioélectriques Type de document : Article/Communication Auteurs : Françoise de Blomac, Auteur Année de publication : 2010 Article en page(s) : pp 12 - 13 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes descripteurs IGN] cartographie thématique [Termes descripteurs IGN] logiciel de cartographie [Termes descripteurs IGN] onde radioélectrique [Termes descripteurs IGN] rayonnement radioélectrique [Termes descripteurs IGN] risque sanitaire Résumé : (Auteur) Les ondes radioélectriques qui nous entourent suscitent inquiétudes et, parfois, fantasmes. Collectivités, services de l'Etat et opérateurs téléphoniques manquent d'outils pour anticiper l'exposition des personnes à l'amont des projets et nourrir les débats avec des informations validées et acceptées. Pour les aider, le Centre d'études Scientifiques et Techniques du Bâtiment (CSTB) et Geomod proposent désormais MITHRA-REM, présenté le 22 septembre dernier à Paris. Numéro de notice : A2010-412 Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30605 [article]

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Challenged positions: Dynamic sensor network, distributed GPS aperture, and inter-nodal ranging signals / Dorota A. Grejner-Brzezinska in GPS world, vol 21 n° 9 (September 2010)

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Radio technology in the fiels: get the best out of your radios / A. Kluft in Geoinformatics, vol 11 n° 7 (01/11/2008)

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Tropospheric delay modelling at radio wavelengths for space geodetic techniques / Johannes Böhm (2007) 

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Satellite constellation with direct radio measurements for atmospheric studies : WATS mission case / G. Alberti in International Journal of Remote Sensing IJRS, vol 25 n° 18 (September 2004)

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ATDI, le SIG appliqué à la radio : le mariage de la géomatique et de la radio / Anonyme in Géomatique expert, n° 14 (01/03/2002)

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L'impact des servitudes hertziennes et aériennes sur la constructibilité / M.S. DEL Priore (1996)

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Simulation de propagation d'ondes radioélectriques au moyen d'un modèle numérique de terrain / Omar Labidi (1994)

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VHF propagation characterization during atmospheric disturbances / J. Das in International Journal of Remote Sensing IJRS, vol 10 n° 7 (July 1989)

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Ondes électromagnétiques en radioélectricité et en optique / Robert Petit (1989)

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