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GOCE: assessment of GPS-only gravity field determination / Adrian Jäggi in Journal of geodesy, vol 89 n° 1 (January 2015)
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[article]
Titre : GOCE: assessment of GPS-only gravity field determination Type de document : Article/Communication Auteurs : Adrian Jäggi, Auteur ; Heike Bock, Auteur ; U. Meyer, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 33 - 48 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] champ géomagnétique
[Termes IGN] données GOCE
[Termes IGN] données GPS
[Termes IGN] erreur systématique
[Termes IGN] ionosphère
[Termes IGN] orbite précise
[Termes IGN] positionnement cinématiqueRésumé : (auteur) The GOCE satellite was orbiting the Earth in a Sun-synchronous orbit at a very low altitude for more than 4 years. This low orbit and the availability of high-quality data make it worthwhile to assess the contribution of GOCE GPS data to the recovery of both the static and time-variable gravity fields. We use the kinematic positions of the official GOCE precise science orbit (PSO) product to perform gravity field determination using the Celestial Mechanics Approach. The generated gravity field solutions reveal severe systematic errors centered along the geomagnetic equator. Their size is significantly coupled with the ionospheric density and thus generally increasing over the mission period. The systematic errors may be traced back to the kinematic positions of the PSO product and eventually to the ionosphere-free GPS carrier phase observations used for orbit determination. As they cannot be explained by the current higher order ionospheric correction model recommended by the IERS Conventions 2010, an empirical approach is presented by discarding GPS data affected by large ionospheric changes. Such a measure yields a strong reduction of the systematic errors along the geomagnetic equator in the gravity field recovery, and only marginally reduces the set of useable kinematic positions by at maximum 6 % for severe ionosphere conditions. Eventually it is shown that GOCE gravity field solutions based on kinematic positions have a limited sensitivity to the largest annual signal related to land hydrology. Numéro de notice : A2015-328 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0759-z Date de publication en ligne : 10/09/2014 En ligne : https://doi.org/10.1007/s00190-014-0759-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76653
in Journal of geodesy > vol 89 n° 1 (January 2015) . - pp 33 - 48[article]
Titre : GPS for land surveyors Type de document : Guide/Manuel Auteurs : Jan Van Sickle, Auteur Mention d'édition : 4ème édition Editeur : Boca Raton, New York, ... : CRC Press Année de publication : 2015 Importance : 349 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-1-4665-8310-8 Note générale : Glossaire et bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] coordonnées GPS
[Termes IGN] erreur systématique
[Termes IGN] Global Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] GPS en mode statique
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement statique
[Termes IGN] récepteur GPS
[Termes IGN] secteur spatial
[Termes IGN] signal GPS
[Termes IGN] système d'extension
[Termes IGN] temps réelIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) For more than a decade, GPS for Land Surveyors has been unique among other books on this topic due to its clear, straightforward treatment of the subject matter. Completely revised and updated, this fourth edition of a perennial bestseller maintains the user-friendly format that made previous editions so popular while addressing changes in hardware, software, and procedures. Neither simplistic nor overly technical, this book introduces the concepts needed to understand and use GPS and Global Navigation Satellite Systems (GNSS). See What’s New in the Fourth Edition: - Up-to-date information on GNSS and GPS modernization, - Changes in hardware, software, and procedures, - Comprehensive treatment of novel signals on new blocks of satellites (L5 and L2C). The book minimizes your reliance on mathematical explanations and maximizes use of illustrations and examples that allow you to visualize and grasp key concepts. The author explains the progression of ideas at the foundation of satellite positioning and delves into some of the particulars. He keeps presentation practical, providing a guide to techniques used in GPS, from their design through observation, processings, real-time kinematic (RTK), and real-time networks. These features and more make it easier for you to meet the challenge of keeping up in this field. Note de contenu :
1. Global Positioning System (GPS) Signal
- GPS Signal Structure
- Two Observables
- Pseudoranging
- Carrier Phase Ranging
2. Biases and Solutions
- Biases
- Receiver Noise
- Solutions
- Summary
3. Framework
- Technological Forerunners
- GPS Segments
- GPS Constellation
4. Receivers and Methods
- Common Features of Global Positioning System (GPS) Receivers
5. Coordinates
- A Few Pertinent Ideas about Geodetic Datums for Global Positioning Systems
- State Plane Coordinates
- Heights
6. Static Global Positioning System Surveying
- Planning
- National Geodetic Survey (NGS) Control
- Control from Continuously Operating Networks
- Static Survey Project Design
- Preparation
- Some GPS Survey Design Facts
- Drawing the Baselines
- Static GPS Control Observations
7. Real-Time Global Positioning System Surveying
- Real-Time Kinematic (RTK) and Differential GPS (DGPS)
- General Idea
- Radial GPS
- DGPS
- Local and Wide Area DGPS
- Geographic Information Systems (GIS) Application
- Integer Cycle Ambiguity Fixing
- Wireless Link
- Vertical Component in RTK
- Some Practical RTK Suggestions
- Real-Time Network Services
- Real-Time GPS Techniques
- Precise Point Positioning (PPP)
8. Global Positioning System Modernization and Global Navigation Satellite System
- Global Positioning System (GPS) Modernization
- Satellite Blocks
- Power Spectral Density Diagrams
- New Signals
- Global Navigation Satellite System (GNSS)
- GLONASS
- Galileo
- Interoperability between GPS, GLONASS, and GALILEO
- BeiDou
- Quasi-Zenith Satellite System (QZSS)
- IRNSS
- The Future
- InteroperabilityNuméro de notice : 22522 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81497 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 22522-01 30.61 Livre Centre de documentation Géodésie Disponible
Titre : GPS satellite surveying Type de document : Guide/Manuel Auteurs : Alfred Leick, Auteur ; Lev Rapoport, Auteur ; Dmitry Tatarnikov, Auteur Mention d'édition : 4th edition Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2015 Importance : 807 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-1-118-67557-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GNSS
[Termes IGN] compensation Lambda
[Termes IGN] Global Positioning System
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] positionnement par GNSS
[Termes IGN] troposphèreIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) This book is the classic text on the subject, providing the most comprehensive coverage of global navigation satellite systems applications for surveying. Fully updated and expanded to reflect the field's latest developments, this new edition contains new information on GNSS antennas, Precise Point Positioning, Real-time Relative Positioning, Lattice Reduction, and much more. New contributors offer additional insight that greatly expands the book's reach, providing readers with complete, in-depth coverage of geodetic surveying using satellite technologies. The newest, most cutting-edge tools, technologies, and applications are explored in-depth to help readers stay up to date on best practices and preferred methods, giving them the understanding they need to consistently produce more reliable measurement. Global navigation satellite systems have an array of uses in military, civilian, and commercial applications. In surveying, GNSS receivers are used to position survey markers, buildings, and road construction as accurately as possible with less room for human error. This book provides complete guidance toward the practical aspects of the field, helping readers to: - Get up to speed on the latest GPS/GNSS developments, - Understand how satellite technology is applied to surveying, - Examine in-depth information on adjustments and geodesy, - Learn the fundamentals of positioning, lattice adjustment, antennas, and more. The surveying field has seen quite an evolution of technology in the decade since the last edition's publication. This new edition covers it all, bringing the reader deep inside the latest tools and techniques being used on the job. Surveyors, engineers, geologists, and anyone looking to employ satellite positioning will find GPS Satellite Surveying to be of significant assistance. Note de contenu : 1. INTRODUCTION
2. LEAST-SQUARES ADJUSTMENTS
2.1 Elementary Considerations
2.2 Stochastic and Mathematical Models
2.3 Mixed Model
2.4 Sequential Mixed Model
2.5 Model Specifications
2.6 Minimal and Inner Constraints
2.7 Statistics in Least-Squares Adjustment
2.8 Reliability
2.9 Blunder Detection
2.10 Examples
2.11 Kalman Filtering
3. RECURSIVE LEAST SQUARES
3.1 Static Parameter
3.2 Static Parameters and Arbitrary Time-Varying Variables
3.3 Dynamic Constraints
3.4 Static Parameters and Dynamic Constraints
3.5 Static Parameter, Parameters Subject to Dynamic Constraints, and Arbitrary Time-Varying Parameters
4. GEODESY
4.1 International Terrestrial Reference Frame
4.2 International Celestial Reference System
4.3 Datum
4.4 3D Geodetic Model
4.5 Ellipsoidal Model
4.6 Conformal Mapping Model
4.7 Summary
5. SATELLITE SYSTEMS
5.1 Motion of Satellites
5.2 Global Positioning System
5.3 GLONASS
5.4 Galileo
5.5 QZSS
5.6 Beidou
5.7 IRNSS
5.8 SBAS: WAAS, EGNOS, GAGAN, MSAS, and SDCM
6. GNSS POSITIONING APPROACHES
6.1 Observables
6.2 Operational Details
6.3 Navigation Solution
6.4 Relative Positioning
6.5 Ambiguity Fixing
6.6 Network-Supported Positioning
6.7 Triple-Frequency Solutions
6.8 Summary
7. REAL-TIME KINEMATICS RELATIVE POSITIONING
7.1 Multisystem Considerations
7.2 Undifferenced and Across-Receiver Difference Observations
7.3 Linearization and Hardware Bias Parameterization
7.4 RTK Algorithm for Static and Short Baselines
7.5 RTK Algorithm for Kinematic Rovers and Short Baselines
7.6 RTK Algorithm with Dynamic Model and Short Baselines
7.7 RTK Algorithm with Dynamic Model and Long Baselines
7.8 RTK Algorithms with Changing Number of Signals
7.9 Cycle Slip Detection and Isolation
7.10 Across-Receiver Ambiguity Fixing
7.11 Software Implementation
8. TROPOSPHERE AND IONOSPHERE
8.1 Overview
8.2 Tropospheric Refraction and Delay
8.3 Troposphere Absorption
8.4 Ionospheric Refraction
9. GNSS RECEIVER ANTENNAS
9.1 Elements of Electromagnetic Fields and Electromagnetic Waves
9.2 Antenna Pattern and Gain
9.3 Phase Center
9.4 Diffraction and Multipat
9.5 Transmission Lines
9.6 Signal-to-Noise Ratio
9.7 Antenna TypesNuméro de notice : 22434 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79696 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 22434-01 30.61 Livre Centre de documentation Géodésie Disponible Intégrité d'un système de navigation inertielle hybridé GNSS / B. Deleaux in Navigation aérienne, maritime, spatiale, terrestre, vol 62 n° 246 (janvier 2015)
[article]
Titre : Intégrité d'un système de navigation inertielle hybridé GNSS Type de document : Article/Communication Auteurs : B. Deleaux, Auteur ; M. Destelle, Auteur ; C. Chalignes, Auteur ; Sagem Défense Sécurité, Auteur Année de publication : 2015 Article en page(s) : pp 34 - 43 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] centrale inertielle
[Termes IGN] couplage GNSS-INS
[Termes IGN] positionnement par GNSS
[Termes IGN] précision du positionnementRésumé : (auteur) Depuis des années, la croissance continue du trafic aérien a conduit à réduire l'espace entre les avions tout en améliorant la sécurité. Pour ce faire il est nécessaire de connaître avec précision la position de l'avion, avec un système de surveillance et d'alarme - intégrité conforme au principe de RNP (requested navigation performance).
Le GNSS/INS (Hybrid inertial navigation system) permet déjà d'obtenir des résultats de positionnement de haute performance, mais les nouvelles contraintes d'intégrité nécessitent de développer des architectures et des algorithmes associés plus évolués. [...]Numéro de notice : A2015-007 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75142
in Navigation aérienne, maritime, spatiale, terrestre > vol 62 n° 246 (janvier 2015) . - pp 34 - 43[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 094-2015011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Korrektur stationsabhängiger Fehler bei GNSS Type de document : Thèse/HDR Auteurs : Andreas Knöpfler, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2015 Collection : DGK - C, ISSN 0065-5325 num. 744 Importance : 177 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5156-0 Note générale : bibliographie
akademisches Grades eines Doktor-Ingenieurs von der Fakultüt für Bauingenieur-, Geo- und Umweltwissenschaften des Karlsruher Instituts für TechnologieLangues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GNSS
[Termes IGN] centre de phase
[Termes IGN] erreur systématique
[Termes IGN] étalonnage d'instrument
[Termes IGN] modèle d'erreur
[Termes IGN] positionnement ponctuel précis
[Termes IGN] positionnement statique
[Termes IGN] résidu
[Termes IGN] traitement de données GNSS
[Termes IGN] trajet multipleMots-clés libres : stacking map Index. décimale : 30.60 Géodésie spatiale Résumé : (auteur) Highly precise positioning techniques based on Global Navigation Satellite Systems (GNSS) have become a standard tool for numerous disciplines, benefitting from the continuous development of receiver equipment and the appearance of additional GNSS. In addition to the classical differential processing approach, the Precise Point Positioning (PPP) method is able to derive station coordinates with the same accuracy as a baseline setup, when sufficient observation time is available. The basis for PPP is the improved quality of external products for the GNSS data processing, for example the orbit and especially the satellite clock products of the International GNSS Service (IGS) and its analysis centers.
The increased usage of GNSS comes along with higher demands on accuracy. Therefore, the modelling of important error sources in GNSS is continuously upgraded. Intensive research led to a refinement of both the functional and the stochastic model in GNSS data processing in order to enable the correction of specific error components, for example the antenna behaviour or the tropospheric delay. Despite of the improvements in GNSS modelling, multipath effects still remain as a main error source in highly precise GNSS positioning. Within this work, stacking techniques are used to correct for multipath effects and further site dependent errors, for example residual errors in the calibration values of the receiving GNSS antenna. The method developed in this work is based on zero difference PPP residuals, which are accumulated over defined azimuth-elevation cells and over a fixed period of time (here: 10 d) and introduced as correction (so-called stacking maps) in a second PPP processing run. The main purpose of this approach aims for the improvement of data, recorded on continuously operating reference stations.
Within this work, two scenarios for the implementation of the corrections were investigated in detail: the combination of the stacking maps joined with the calibration information of the GNSS receiving antennas and in contrast to this approach the separate modelling of both aspects in a separate file. In order to check the effectivity of this method, the results (e.g., coordinates, residuals) before and after the introduction of the stacking maps were intensively analyzed. Within the second scenario (introduction of the correction in a separate file), the behaviour of the stacking maps over time was investigated by the analysis of so-called sliding stacking maps. Sliding stacking maps are generated as follows: calculation of a first stacking map from the residuals for example for day of year (DoY) 121 to 130 and introduction as correction for DoY 131, the next stacking map is computed from the residuals for DoY 122 to 131 and introduced for DoY 132 and so on. Especially sites with poor data quality show a significant improvement of the residual values after the implementation of stacked information. Furthermore, observations remain in the used data set, whereas they were eliminated in the processing without the introduction of stacking maps.
In addition, the necessity of expensive, site-dependent individual antenna calibration was checked. The focus was on the compensating level of the stacking approach with respect to unmodelled antenna effects based on the replacement of individual receiving antenna calibrations by type mean values of the IGS in combination with stacking maps. Therefore, data of selected sites were processed using both the existing individual antenna calibration sets and the IGS type mean values. In a second processing run, the calibration sets were introduced taking the corresponding stacking information into account. Differences in the phase center variations of the antennas can be corrected by the stacking maps. Discrepancies due to differences in the phase center offsets remain in the estimated site coordinates.Numéro de notice : 14920 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Note de thèse : PhD : Géodésie : Karlsruhes Institut für Technologie : 2015 DOI : 10.5445/KSP/1000045959 En ligne : https://doi.org/10.5445/KSP/1000045959 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76931 La mesure du niveau de la mer par bouées GPS : l'expérience multi-capteurs de l'île d'Aix / Gaël André in Navigation aérienne, maritime, spatiale, terrestre, vol 62 n° 246 (janvier 2015)
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