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Titre : Precise relative positioning of formation flying spacecraft using GPS Type de document : Thèse/HDR Auteurs : Remco Kroes, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2006 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 61 Importance : 163 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-296-2 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] ambiguïté entière
[Termes IGN] compensation Lambda
[Termes IGN] erreur systématique
[Termes IGN] filtre de Kalman
[Termes IGN] GPS-INS
[Termes IGN] GRACE
[Termes IGN] image TerraSAR-X
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] méthode des moindres carrés
[Termes IGN] navigation spatiale
[Termes IGN] orbitographie par GNSS
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement par GPS
[Termes IGN] précision millimétrique
[Termes IGN] qualité des données
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal GPSIndex. décimale : 30.70 Navigation et positionnement Résumé : (Auteur) Spacecraft formation flying is currently considered as a key technology for advanced space missions. Compared to large individual spacecraft, the distribution of Sensor systems amongst multiple platforms offers improved flexibility and redundancy, shorter times to mission and the prospect of being more cost effective. Besides these advantages, satellite formations in low Earth orbit provide advanced science opportunities that cannot, or not easily, be realized with single spacecraft. One of the fundamental issues of spacecraft formation flying is the determination of the relative state (position and velocity) between the satellite vehicles within the formation. Knowledge of these relative states in (near) real-time is important for operational aspects. In addition, some of the scientific applications, such as high resolution interferometry, require an accurate post-facto knowledge of these States. The goal of this dissertation is therefore to develop, implement and test a method for high precise post-facto relative positioning of formation flying spacecraft, using GPS observation data. The need for such a methodology comes from scientific satellite formation flying missions that are currently being planned. A good example here is the Synthetic Aperture Radar (SAR) interferometry formation consisting of the TerraSAR-X and TanDEM-X satellites. The primary mission objective here requires the relative position to be known within a 2 mm precision (1-dimensional).
GPS receivers are often considered as the primary instruments for precise relative navigation in future satellite formation flying missions. As is commonly known, precise relative positioning between GPS receivers in geodetic networks is exercised on a routine basis. Furthermore, GPS receivers are already frequently used onboard satellites to perform all kinds of navigational tasks, are suitable for real-time applications and provide measurements with a 3-dimensional nature.
Previous studies carried out in this research area focussed on the real-time or operational aspects, and all used GPS data obtained from software or hardware-in-the-loop simulations. This dissertation clearly distinguishes itself due to the fact that the developed methodology has been tested using real-world GPS data from the GRACE mission, which in addition also provides a precise way to validate the obtained results by means of the GRACE K/Ka-Band Ranging System (KBR) observations.
One of the key aspects of any GPS positioning application is the quality of the observation data used. To this extent an in-flight performance analysis of the used GRACE (and CHAMP) GPS data bas been carried out. The results show that the GRACE GPS pseudorange observations, on the individual frequencies, are subject to systematic errors in the order of 10-15 cm. Furthermore, an assessment of the noise of both the GPS pseudorange and carrier phase data demonstrates that the noise of the GRACE B observation data is significantly lower.
When using GPS for precise relative spacecraft positioning, the trajectory or orbit of one of the spacecraft, serving as the reference, has to be known to the best possible extent. In order to facilitate this, a total of three precise orbit determination strategies, using undifferenced ionosphere free GPS pseudorange and carrier phase observations, have been implemented and tested. They comprise a kinematic and reduced dynamic batch LSQ estimation method, as well as an extended Kalman filter/smoother (EKF), that also form the conceptual basis for the relative spacecraft positioning strategies. Each of the precise orbit determination concepts has been tested using GPS data from the CHAMP and GRACE missions. The reduced dynamic batch LSQ orbits were validated with Satellite Laser Ranging data, where the residuals showed an RMS of 3-4 cm.
Out of a total of four possible processing strategies that have been identified for relative spacecraft positioning, only an extended Kalman filter/smoother has proven to work satisfactorily when tested on the real-world GRACE GPS data. The EKF processes single difference GPS pseudorange and carrier phase observations and uses (pseudo) relative spacecraft dynamics to propagate the relative satellite state over the observation epochs. Despite its single difference parametrization the EKF can still resolve and incorporate the integer double difference carrier phase ambiguities, which is commonly regarded as, and has proven to be in this dissertation, the key to precise GPS based relative positioning. Estimation of the integer ambiguities is accomplished by the well known Least Squares Ambiguity Decorrelation Adjustment (LAMBDA) method. Due to the presence of systematic errors in the GRACE GPS data, a relatively conservative validation of the estimated integer ambiguity parameters was found to be required prior to their incorporation in the filter. When validating the daily ambiguity fixed GRACE relative position solutions from the EKF with the KBR observations, it has been shown that an actual overall relative position precision of 0.9 mm (1-dimensional) over a 101 day data arc is achieved. This dissertation is the first that proves that such precision can be truly obtained for real-world relative spacecraft positioning applications.Note de contenu : 1 Introduction
1.1 Spacecraft formation flying using GPS
1.2 Research objective and motivation
1.3 The CHAMP and GRACE satellite missions
1.4 Outline
2 GPS observations
2.1 Observation types
2.3 Linear data combinations
2.4 Linearization for positioning
2.5 Relative positioning models
2.6 GPS data quality
3 Precise orbit determination
3.1 GPS orbit and clock products
3.2 Reference frame transformations.
3.3 Kinematic orbit determination.
3.4 Reduced dynamic orbit determination
3.5 GHOST toolkit
3.6 POD results
4 Relative spacecraft positioning
4.1 Integer ambiguity resolution
4.2 Proposed processing strategies
4.3 Details of the extended Kalman filter
4.4 Extended Kalman filter results.
4.5 Some words on
5 Conclusions and outlookNuméro de notice : 15179 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : sans En ligne : https://www.ncgeo.nl/downloads/61Kroes.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55089 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15179-01 30.70 Livre Centre de documentation Géodésie Disponible 15179-02 30.70 Livre Centre de documentation Géodésie Disponible Reliability of direct georeferencing: An overview of the current approaches and possibilities / Jan Skaloud (2006)
Titre : Reliability of direct georeferencing: An overview of the current approaches and possibilities : Final report on phase 1 Type de document : Rapport Auteurs : Jan Skaloud, Auteur Editeur : Dublin : European Spatial Data Research EuroSDR Année de publication : 2006 Collection : EuroSDR official publication, ISSN 0257-0505 num. 51 Importance : pp 143 - 148 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] capteur spatial
[Termes IGN] centrale inertielle
[Termes IGN] contrôle qualité
[Termes IGN] données GNSS
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] filtre de Kalman
[Termes IGN] géoréférencement direct
[Termes IGN] GPS-INS
[Termes IGN] orientation du capteur intégrée
[Termes IGN] Receiver Autonomous Integrity MonitoringRésumé : (auteur) After some initial hesitations, the direct georeferencing (DG) of airborne sensors by GPS/INS is now a widely accepted approach in the airborne mapping industry. Implementing DG not only speeds up the mapping process and thus increases the productivity, but also opens the door to new monitoring applications. Although the system manufactures tend to claim that DG is a well established technique and no longer a research topic, the technology users often encounter pitfalls due to undetected sensor behavior, varying data quality and consistency. One could almost claim that the reliability of DG is the Achilles’ heel of this otherwise revolutionary approach in civil airborne mapping. EuroSDR has recognized this problem and would like to address it in several phases. First phase of this effort are some preliminary investigations, charting the current situation and making suggestions for further research. The investigations are divided into the following technology fields: GNSS, inertial sensors and estimation methods, integrity and communication, calibration and integrated sensor orientation. Each field describes the current situation with respect to DG and discusses additional existing possibilities. These do not claim to be complete or exhaustive; however, they claim to address the essential features, methods and processes, the combination of which could increase the reliability of DG substantially without setting large side penalties. Numéro de notice : H2006-002 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Chapître / contribution En ligne : http://www.eurosdr.net/publications/official-publication-no-51-2006 Format de la ressource électronique : URL bulletin Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93668 Documents numériques
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Reliability of Direct Georeferencing... - pdf auteurAdobe Acrobat PDF
Titre : Status of DORIS Stations in Antarctica for Precise Geodesy Type de document : Article/Communication Auteurs : Martine Amalvict, Auteur ; Pascal Willis , Auteur ; K. Shibuya, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 130 Conférence : IAG 2005, IAG Symposium IAG conference Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools 22/08/2005 26/08/2005 Cairns Australie Proceedings Springer Importance : pp 94 - 102 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Adélie, Terre
[Termes IGN] Antarctique
[Termes IGN] données DORIS
[Termes IGN] données GPS
[Termes IGN] données ITGB
[Termes IGN] gravimètre absolu
[Termes IGN] interférométrie à très grande base
[Termes IGN] levé gravimétrique
[Termes IGN] vitesse de déplacementRésumé : (auteur) Polar regions and especially Antarctica are nowadays recognised as exerting a major control upon the global Mean Sea Level (MSL) directly linked to climate changes. Monitoring and understanding the geodynamical behaviour of these regions is then of critical importance. The long-term displacement (or velocity) of reference sites helps constraining the ice sheet evolution prediction models. Several geodetic space techniques, such as GPS, observe displacements of such reference sites. In Antarctica, in addition to numerous GPS stations, four DORIS stations are permanently operating: Belgrano, Rothera, Syowa, Terre Adélie. In addition to the permanent DORIS stations, episodic DORIS campaigns took also place at Dome C / Concordia and on Sorsdal and Lambert glaciers. In this paper, we first present general information concerning the stations and the campaigns (exact location, period of measurements, etc). We then discuss the solutions obtained by different analysis centres (when available) for all DORIS stations in the Antarctic region. In particular, we use several ITRFs (from the early ITRF96 to ITRF2000) to see their impact on the derived velocities in Antarctica. An emphasis is given to the investigation and possible explanation of differences observed between each solution. Finally, we compare at these stations, the results of DORIS observations to the solutions from other geodetic techniques (GPS, VLBI) and to the results of repeated absolute gravity measurements (when available). Numéro de notice : C2005-042 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-49350-1_17 En ligne : https://doi.org/10.1007/978-3-540-49350-1_17 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102723 To locate a phone or PDA: GNSS/UMTS prototype for mass-market applications / G. Heinrichs in GPS world, vol 17 n° 1 (January 2006)
[article]
Titre : To locate a phone or PDA: GNSS/UMTS prototype for mass-market applications Type de document : Article/Communication Auteurs : G. Heinrichs, Auteur ; J. Winkel, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 20 - 27 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] Galileo
[Termes IGN] géonavigateur
[Termes IGN] navigation
[Termes IGN] PDA
[Termes IGN] positionnement en intérieur
[Termes IGN] positionnement par GNSS
[Termes IGN] signal Galileo
[Termes IGN] signal GPS
[Termes IGN] télécommunication sans fil
[Termes IGN] téléphonie mobileRésumé : (Auteur) An important market step for Galileo will be timely availability of hybrid Galileo/GPS receivers in combination with wireless communications network positioning capabilities for consumer applications. The GAWAIN project has investigated these advanced receiver concepts, and this article presents initial ideas regarding an integrated GNSS/UMTS receiver architecture to meet the important requirements of seamless indoor/outdoor navigation. Copyright Questex Media Group Inc Numéro de notice : A2006-009 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27736
in GPS world > vol 17 n° 1 (January 2006) . - pp 20 - 27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-06011 RAB Revue Centre de documentation En réserve L003 Disponible Understanding GPS / Elliott D. Kaplan (2006)
Titre : Understanding GPS : principles and applications, second edition Type de document : Monographie Auteurs : Elliott D. Kaplan, Éditeur scientifique ; Christopher Hegarty, Éditeur scientifique Mention d'édition : 2 Editeur : Londres, Washington : Artech House Année de publication : 2006 Importance : 703 p. Format : 18 x 26 cm ISBN/ISSN/EAN : 978-1-58053-894-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Galileo
[Termes IGN] Global Navigation Satellite System
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] signal GPSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) This thoroughly updated second edition of an Artech House bestseller brings together a team of leading experts who provide a current and comprehensive treatment of the Global Positioning System (GPS). The book covers all the latest advances in technology, applications, and systems. The second edition includes new chapters that explore the integration of GPS with vehicles and cellular telephones, new classes of satellite broadcast signals, the emerging GALILEO system, and new developments in the GPS marketplace. This single-source reference provides a quick overview of GPS essentials, an in-depth examination of advanced technical topics, and a review of emerging trends in the GPS industry. Engineers can use this book to build GPS receivers and integrate them into navigational and communications equipment. Executives can turn to this book to determine how technology is affecting markets and how best to invest their companies’ resources. The book also serves as a handy resource for electrical engineering students looking to advance their studies and careers in GPS. Note de contenu : HAPTER 1
Chapitre 1 : Introduction
1.1 Introduction
1.2 Condensed GPS Program History
1.3 GPS Overview
1.4 GPS Modernization Program
1.5 GALILEO Satellite System
1.6 Russian GLONASS System
1.7 Chinese BeiDou System
1.8 Augmentations
1.9 Markets and Applications
1.10 Organization of the Book References
CHAPTER 2
Chapitre 2 : Fundamentals of Satellite Navigation
2.1 Concept of Ranging Using TOA Measurements
2.2 Reference Coordinate Systems
2.3 Fundamentals of Satellite Orbits
2.4 Position Determination Using PRN Codes
2.5 Obtaining User Velocity
2.6 Time and GPS
References
CHAPTER 3
Chapitre 3 : GPS System Segments
3.1 Overview of the GPS System
3.2 Space Segment Description
3.3 Control Segment
3.4 User Segment
References
CHAPTER 4
Chapitre 4 : GPS Satellite Signal Characteristics
4.1 Overview
4.2 Modulations for Satellite Navigation
4.3 Legacy GPS Signals
4.4 Navigation Message Format
4.5 Modernized GPS Signals
4.6 Summary
References
CHAPTER 5
Chapitre 5 : Satellite Signal Acquisition, Tracking, and Data Demodulation
5.1 Overview
5.2 GPS Receiver Code and Carrier Tracking
5.3 Carrier Tracking Loops
5.4 Code Tracking Loops
5.5 Loop Filters
5.6 Measurement Errors and Tracking Thresholds
5.7 Formation of Pseudorange, Delta Pseudorange, and Integrated Doppler
5.8 Signal Acquisition
5.9 Sequence of Initial Receiver Operations
5.10 Data Demodulation
5.11 Special Baseband Functions
5.12 Use of Digital Processing
5.13 Considerations for Indoor Applications
5.14 Codeless and Semicodeless Processing
References
CHAPTER 6
Chapitre 6 : Interference, Multipath, and Scintillation
6.1 Overview
6.2 Radio Frequency Interference
6.3 Multipath
6.4 Ionospheric Scintillation
References
CHAPTER 7
Chapitre 7 : Performance of Stand-Alone GPS
7.1 Introduction
7.2 Measurement Errors
7.3 PVT Estimation Concepts
7.4 GPS Availability
7.5 GPS Integrity
7.6 Continuity
7.7 Measured Performance
References
CHAPTER 8
Chapitre 8 : Differential GPS
8.1 Introduction
8.2 Spatial and Time Correlation Characteristics of GPS Errors
8.3 Code-Based Techniques
8.4 Carrier-Based Techniques
8.5 Message Formats
8.6 Examples
References
CHAPTER 9
Chapitre 9 : Integration of GPS with Other Sensors and Network Assistance
9.1 Overview
9.2 GPS/Inertial Integration
9.3 Sensor Integration in Land Vehicle Systems
9.4 Network Assistance
References
CHAPTER 10
Chapitre 10 : GALILEO
10.1 GALILEO Program Objectives
10.2 GALILEO Services and Performance
10.3 GALILEO Frequency Plan and Signal Design
10.4 Interoperability Between GPS and GALILEO
10.5 System Architecture
10.6 GALILEO SAR Architecture
10.7 GALILEO Development Plan
References
CHAPTER 11
Chapitre 11 : Other Satellite Navigation Systems
11.1 The Russian GLONASS System
11.2 The Chinese BeiDou Satellite Navigation System
11.3 The Japanese QZSS Program
References
CHAPTER 12
Chapitre 12 : GNSS Markets and Applications
12.1 GNSS: A Complex Market Based on Enabling Technologies
12.2 Civil Navigation Applications of GNSS
12.3 GNSS in Surveying, Mapping, and Geographical Information Systems
12.4 Recreational Markets for GNSS-Based Products
12.5 GNSS Time Transfer
12.6 Differential Applications and Services
12.7 GNSS and Telematics and LBS
12.8 Creative Uses for GNSS
12.9 Government and Military Applications
12.10 User Equipment Needs for Specific Markets
12.11 Financial Projections for the GNSS Industry
References
APPENDIX A
Appendix A : Least Squares and Weighted Least Squares Estimates
Reference
APPENDIX B
Appendix B : Stability Measures for Frequency Sources
B.1 Introduction
B.2 Frequency Standard Stability
B.3 Measures of Stability
B.3.1 Allan Variance
B.3.2 Hadamard Variance
References
APPENDIX C
Appendix C : Free-Space Propagation Loss
C.I Introduction
C.2 Free-Space Propagation Loss
C.3 Conversion Between PSDs and PFDs
ReferencesNuméro de notice : 16717 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55232 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16717-01 30.61 Livre Centre de documentation Géodésie Disponible 16717-02 DEP-PMT Livre SGM Dépôt en unité Exclu du prêt Analysis of long-range network RTK during a severe ionospheric storm / Pawel Wielgosz in Journal of geodesy, vol 79 n° 9 (December 2005)PermalinkIs there utility in rigorous combinations of VLBI and GPS Earth orientation parameters? / Jim Ray in Journal of geodesy, vol 79 n° 9 (December 2005)PermalinkLa modernisation du GPS / B. Fosburgh in XYZ, n° 105 (décembre 2005 - février 2006)PermalinkLe point sur les traitements de données GNSS en réseau pour un positionnement centimétrique temps réel de meilleure qualité / Romain Legros in XYZ, n° 105 (décembre 2005 - février 2006)PermalinkEarly results are in testing a prototype Galileo receiver / N. Gerein in GPS world, vol 16 n° 11 (November 2005)PermalinkLe réseau déploie ses ailes / Anne Fantuzzi in Géomètre, n° 2020 (novembre 2005)PermalinkA tsunami early-warning system: the Paris [passive reflectometry and interferometry system] concept / M. Martin-Neira in ESA bulletin, n° 124 (November 2005)Permalink1er forum de topographie le 17 mars 2005 : la table ronde, animée par M. Kasser, a été consacrée au thème suivant : vers l'achèvement d'un cycle de modifications majeures dans le domaine de la topométrie ? / Michel Kasser in XYZ, n° 104 (septembre - novembre 2005)PermalinkNaviguer dans le monde sans fil : un aperçu de l'influence exercée par la technologie sans fil sur les topographes / N. Pugh in XYZ, n° 104 (septembre - novembre 2005)PermalinkPrime time positioning: using broadcast TV signals to fill GPS acquisition gaps / M. Martone in GPS world, vol 16 n° 9 (September 2005)PermalinkLe GPS : comment ça marche ? / Jean-Mathieu Nocquet in Géochronique, n° 94 (juin - août 2005)PermalinkL'intégration complète du GPS et d'un tachéomètre : le Smartstation de Leica / F. Kadded in XYZ, n° 103 (juin - août 2005)PermalinkIonospheric modeling: the key to GNSS ambiguity resolution / T. Richert in GPS world, vol 16 n° 6 (June 2005)PermalinkTechnique de lever par véhicule équipé de récepteurs GPS et d'une station totale / Hervé Gontran in XYZ, n° 103 (juin - août 2005)PermalinkL'utilisation du GPS pour l'imagerie de l'ionosphère / J. Artru in Géochronique, n° 94 (juin - août 2005)PermalinkValidation expérimentale du logiciel de lancer de rayons Ergospace et estimation de la précision du MNE requise pour son utilisation (article) / Thomas Tirtaine in XYZ, n° 102 (mars - mai 2005)PermalinkGalileo, un projet de plus en plus mondial / Françoise de Blomac in SIG la lettre, n° 64 (février 2005)PermalinkAnalyse des stochastischen Modells von GPS-Trägerphasenbeobachtungen / J. Howind (2005)PermalinkApplied satellite navigation using GPS, Galileo, and augmentation systems / R. Prasad (2005)PermalinkClustérisation des calculs quotidiens du réseau GPS permanent, Volume 1. Rapport de stage / Yannick Carré (2005)PermalinkEtude d’une méthode de sondage de la vapeur d’eau dans la troposphère appliquée à la correction de mesures GPS pour l’altimétrie de haute précision / Jérôme Tarniewicz (2005)PermalinkPermalinkEtude au sein de la division des travaux spéciaux de l'IGN / M.E. Duret (2005)PermalinkGPS-Anwendungen in der Sportwissenschaft / T. Blumenbach (2005)PermalinkGuide pratique du GPS / Paul Correia (2005)PermalinkQuantification de la vapeur d'eau troposphérique par GPS (modèles 2D et tomographies 3D) - Application aux précipitations intenses / Cédric Champollion (2005)PermalinkLes satellites traquent les voleurs de sapins ! / Françoise de Blomac in SIG la lettre, n° 63 (janvier 2005)PermalinkPermalinkPermalinkVerbesserung des Datenmanagements in inhomogenen rechnernetzen geodätischer Messeinrichtungen auf des Basis von Middleware und Dateisystemen am Beispiel der Fundamentalstation Wettzell / A. Neidhardt (2005)PermalinkSingle frequency processing of atmospheric radio occultations / M. De La Torre Juarez in International Journal of Remote Sensing IJRS, vol 25 n° 18 (September 2004)PermalinkMapping the atmospheric water vapor by integrating microwave radiometer and GPS measurements / P. Basili in IEEE Transactions on geoscience and remote sensing, vol 42 n° 8 (August 2004)PermalinkSpacecraft formation flying: relative positioning using dual-frequency carrier phase / Remco Kroes in GPS world, vol 15 n° 7 (July 2004)PermalinkGPS modernization: impact on the surveying profession / B. Fosburgh in GIM international, vol 18 n° 5 (May 2004)PermalinkJamming protection of GPS receivers: part 2 antenna enhancements / S. Rounds in GPS world, vol 15 n° 2 (February 2004)PermalinkGPS satellite surveying / Alfred Leick (2004)PermalinkGravity, geoïd and geodynamics 2000 GGG 2000, IAG international symposium, Banff, Alberta, Canada, July 31 - August 4, 2000 / Michael G. Sideris (2004)PermalinkJamming protection of GPS receivers: part 1 receiver enhancements / S. Rounds in GPS world, vol 15 n° 1 (January 2004)PermalinkMise en place d'un SIG pour la gestion du contrôle qualité de la grille de référence des altitudes françaises RAF 98 = [mémoire de] Projet de fin d'études, Universitatea Tehnica de Constructii Bucuresti UTCB / P.D. Dumitru (2004)PermalinkPermalinkPhase ambiguity determination for the positioning of interferometric SAR data / A. Sowter in Photogrammetric record, vol 18 n° 104 (December 2003 - February 2004)PermalinkCurrent GPS data analysis at CLDG for the IGS TIGA Pilot Project / Guy Wöppelmann in Cahiers bleus du Centre Europeen de Geodynamique et de Séismologie, vol 23 (2003)PermalinkDegradation of GPS performance in geomagnetically disturbed conditions / E.L. Afraimovitch in GPS solutions, vol 7 n° 2 (August 2003)PermalinkOptimizing a network-based RTK method for OTF [on-the-fly] positioning / L.P. Fortes in GPS solutions, vol 7 n° 2 (August 2003)PermalinkGPS + INS + pseudolites: an integrated positioning system / Y. Yi in GPS world, vol 14 n° 7 (July 2003)PermalinkGalileo frequency and signal design / Günter W. Hein in GPS world, vol 14 n° 6 (June 2003)PermalinkGalileo performance: GPS interoperability and discriminators for urban and indoor environments / M. O'donnell in GPS world, vol 14 n° 6 (June 2003)PermalinkMultipath mitigation: how good can it get with new signals ? / L.R. Weill in GPS world, vol 14 n° 6 (June 2003)PermalinkMonitoring the ionosphere with GPS: space weather / Anthea Coster in GPS world, vol 14 n° 5 (May 2003)PermalinkSynergetic fusion of GPS and photogrammetrically generated elevation models / Jon P. Mills in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)PermalinkDéveloppement d'un lidar Raman pour le sondage de la vapeur d'eau et la correction des délais troposphériques en GPS / Olivier Bock in Bulletin d'information scientifique et technique de l'IGN, n° 74 (mars 2003)PermalinkAmélioration de la précision de la localisation différentielle temps réel par mesure de phase des systèmes GNSS / Stéphane Durand (2003)PermalinkAnalyse und Optimierung geodätischer Messanordnungen unter besonderer Berücksichtigung des Intervallansatzes / S. Schön (2003)PermalinkPermalinkGPS : Theory, algorithms and applications / Guochang Xu (2003)PermalinkJamming GPS: susceptibility of some civil GPS receivers / B. Forssell in GPS world, vol 14 n° 1 (January 2003)PermalinkMaîtriser la topographie : des observations au plan / Michel Brabant (2003)PermalinkSatellite geodesy : foundations, methods and applications / Günter Seeber (2003)PermalinkZur Bestimmung der GPS-Phasenmehrdeutigkeiten in großräumigen Netzen / K. Wienholz (2003)PermalinkThe effect of broadleaf canopies on survey-grade horizontal GPS-GLONASS measurements / Thomas H. Meyer in Surveying and land information systems, vol 62 n° 4 (01/12/2002)Permalink0,99999999 confidence ambiguity resolution with GPS and Galileo / Christian Tiberius in GPS solutions, vol 6 n° 1-2 (November 2002)PermalinkRadiofrequency interference and GPS: a growing concern / F. Butsch in GPS world, vol 13 n° 10 (October 2002)PermalinkÉtude de la flexion continentale sous la charge océanique à partir des données RGP / Marie-Noëlle Bouin in Bulletin d'information de l'Institut géographique national, n° 73 (septembre 2002)PermalinkFuture GPS and Galileo signal / K. de Jong in Geoinformatics, vol 5 n° 6 (01/09/2002)PermalinkGrid, ground, and globe : Distances in the GPS era / Thomas H. Meyer in Surveying and land information science, vol 62 n° 3 (01/09/2002)PermalinkImprovement of GPS phase ambiguity resolution using prior height information as a quasi-observation / Jianjun Zhu in Geomatica, vol 56 n° 3 (September 2002)PermalinkCurrent strain regime in the Western Alps from continuous Global Positioning System measurements, 1996–2001 / Eric Calais in Geology, vol 30 n° 7 (July 2002)PermalinkGPS signal multipath: a software simulator / S.H. Byun in GPS world, vol 13 n° 7 (July 2002)PermalinkNew trends for the realization of the international terrestrial reference system / Zuheir Altamimi in Advances in space research, vol 30 n° 2 (July 2002)PermalinkVariation in point positioning accuracies for single frequency GPS users during solar maximum / S. Skone in Geomatica, vol 56 n° 2 (June 2002)PermalinkSearching for silent earthquakes with geodetic data / Takeshi Sagiya in Bulletin of the Geographical survey institute, vol 48 (March 2002)PermalinkThe effect of inhomogeneities in the lower atmosphere on coordinates determined from GPS measurements / Olivier Bock in Physics and chemistry of the Earth (A/B/C), vol 27 n° 4-5 ([01/03/2002])PermalinkMapping the low-latitude ionosphere with GPS / M. Fedrizzi in GPS world, vol 13 n° 2 (February 2002)PermalinkApplication des méthodes de résolution d'ambigüités sur la mesure de phase GPS à l'approche de précision / J.P. Chauveau (2002)PermalinkPermalinkStatistische Untersuchung ganzzahliger und reellwertiger unbekannter Parameter im GPS-Modell / B. Gundlich (2002)PermalinkUtilisation du logiciel de l'université de Berne pour le traitement de données GPS en production / Juliette Legrand (2002)PermalinkOn the accuracy of kinematic carrier phase GPS for airborne mapping / A.M. Bruton in Geomatica, vol 55 n° 4 (December 2001)PermalinkAtmospheric modeling in GPS data analysis for high accuracy positioning / Olivier Bock in Physics and chemistry of the Earth, Part A: Solid Earth and Geodesy, vol 26 n° 6-8 (2001)PermalinkAirborne GPS photogrammetry comes of age (Part One) / Peter Kuntu-Mensah in Surveying and land information systems, vol 61 n° 2 (01/06/2001)PermalinkStudy of external path delay correction techniques for high accuracy height determination with GPS / Olivier Bock in Physics and chemistry of the Earth, Part A: Solid Earth and Geodesy, vol 26 n° 3 ([01/03/2001])PermalinkAn overview of multi-reference station methods for cm-level positioning / Georgia Fotopoulos in GPS solutions, vol 4 n° 3 (January 2001)PermalinkEvaluation d'un système de positionnement d'un véhicule sur route basé sur la fusion de données / E. Helou Helo (2001)PermalinkIntérêts scientifiques de la campagne GLONASS IGEX-98 / Muhammad Ali Sammuneh (2001)PermalinkSpatial and temporal distribution of atmospheric water vapor using space geodetic techniques / Lars Peter Kruse (2001)PermalinkThe use of global navigation satellite systems (GNSS) signals in numerical weather prediction (NWP) / Lidia Cucurull Molina (2001)PermalinkNew constraints on Antarctic plate motion and deformation from GPS data / Marie-Noëlle Bouin in Journal of geophysical research : Solid Earth, vol 105 n° B12 ([10/12/2000])PermalinkTransformation des réceptions GPS en coordonnées cartographiques (suite) : GPS et coordonnées en projection / Henri Marcel Dufour in XYZ, n° 83 (juin - août 2000)PermalinkPermalinkGPS, GLONASS and GALILEO : GNSS research at Delft University of Technology / Frank Kleijer in Geoinformatics, vol 3 n° 2 (01/03/2000)PermalinkCombinations of Earth orientation measurements / Richard S. Gross (2000)PermalinkDer Mittelmeerraum. Numerische Modellierung der Lithosphärendynamik im Vergleich mit Ergebnissen aus der Satellitengeodäsie / O. Heidbach (2000)PermalinkDeutsche Beiträge zu GPS-Kampagnen des Scientific Committee on Antarctic Research (SCAR) 1995-1998 / R. Dietrich (2000)PermalinkEinfluß von Auflasteffekten auf präzise GPS-Messungen / Rolf Dach (2000)PermalinkGeodetic applications of the global navigation satellite system (GLONASS) and of GLONASS-GPS combinations / H. Habrich (2000)Permalink