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GOCE: assessment of GPS-only gravity field determination / Adrian Jäggi in Journal of geodesy, vol 89 n° 1 (January 2015)
[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]GPS for land surveyors / Jan Van Sickle (2015)
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 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22522-01 30.61 Livre Centre de documentation Géodésie Disponible Impact of vertical deflection on direct georeferencing of airborne images / M. Pepe in Survey review, vol 47 n° 340 (January 2015)
[article]
Titre : Impact of vertical deflection on direct georeferencing of airborne images Type de document : Article/Communication Auteurs : M. Pepe, Auteur ; G. Prezioso, Auteur ; Raffaele Santamaria, Auteur Année de publication : 2015 Article en page(s) : pp 71 - 76 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] distorsion d'image
[Termes IGN] erreur systématique
[Termes IGN] géoréférencement direct
[Termes IGN] verticaleRésumé : (auteur) This paper is aimed at analysing the influence of the vertical deflection (DOV) in direct georeferencing (DG) of image data from an aerial digital frame camera. Without considering the value of the DOV, a systematic error is involved in the determination of the point position. This investigation has been carried out considering several values of the vertical deviation and, for each of them, the vertical and horizontal error obtained by varying the FOV (Field of View) over the altitude has been analysed. Numéro de notice : A2015-961 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270614Y.0000000087 En ligne : https://doi.org/10.1179/1752270614Y.0000000087 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79949
in Survey review > vol 47 n° 340 (January 2015) . - pp 71 - 76[article]
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 Positioning configurations with the lowest GDOP and their classification / Shuqiang Xue in Journal of geodesy, vol 89 n° 1 (January 2015)
[article]
Titre : Positioning configurations with the lowest GDOP and their classification Type de document : Article/Communication Auteurs : Shuqiang Xue, Auteur ; Yuanxi Yang, Auteur Année de publication : 2015 Article en page(s) : pp 49 - 71 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] affaiblissement géométrique de la précision
[Termes IGN] constellation GNSS
[Termes IGN] équation linéaire
[Termes IGN] erreur systématique
[Termes IGN] optimisation (mathématiques)
[Termes IGN] orbitographie
[Termes IGN] polyèdre
[Termes IGN] pseudoliteRésumé : (auteur) The positioning configuration optimization is a basic problem in surveying, and the geometric dilution of precision (GDOP) is a key index to handle this problem. Simplex graphs as regular polygons and regular polyhedrons are the well-known configurations with the lowest GDOP. However, it has been proved that there are at most five kinds of regular polyhedrons. We analytically solve the GDOP minimization problem with arbitrary observational freedom to extend the current knowledge. The configuration optimization framework established is composed of the algebraic and geometric operators (including combination, reflection, collinear mapping, projection and three kinds of equivalence relations), basic properties to GDOP minimization (including continuity, combination invariant, reflection invariant, rotation invariant and collinear invariant) and the lowest GDOP configurations (including cones, regular polygons, regular polyhedrons, Descartes configuration, helical configuration and generalized Walker configuration, and their reflections and combinations). GDOP minimization criterion and D-maximization criterion both reduce to the same criterion matrices that the optimization becomes the problem for solving an underdetermined quadratic equation system. Making use of the concepts for solving underdetermined linear equation system, the concepts of base configuration (single classification) and general configuration (combined classification) are applied to the GDOP minimization to analytically solve the quadratic equation system. Firstly, the problems are divided into two subproblems by two kinds of GDOP to reveal the impact of the clock-offset on the configuration optimization, and it shows that the symmetry and uniformity play a key role in identifying the systematic errors. Then, the solution of the GDOP minimization is classified by the number of symmetry axes, that the base configurations with at least one symmetry axis and the general configurations without symmetry axis are categorized to be two large classifications. Complex configurations can be then generated by the combination and the reflection of those base configurations with simplex structure, and this indicates that completely solving the GDOP minimization needs to solve the simplex classifications primarily. Ultimately, constrained or unconstrained configuration optimization examples including GDOP distribution analysis, single-global satellite navigation system (GNSS) or multi-GNSS constellation design, configuration optimization of pseudolites and configuration design of buoys for underwater positioning are performed by employing the properties, lemmas, theorems and corollaries proposed. Numéro de notice : A2015-330 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0760-6 Date de publication en ligne : 14/10/2014 En ligne : https://doi.org/10.1007/s00190-014-0760-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76655
in Journal of geodesy > vol 89 n° 1 (January 2015) . - pp 49 - 71[article]A precise state transition model for aircraft navigation / Abhijit Sinha in Geomatica, vol 68 n° 4 (December 2014)PermalinkDetection of systematic displacements in spatial databases using linear elements / A. Mozas-Calvache in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)PermalinkSingle frequency GPS/Galileo precise point positioning using un-differenced and between-satellite single difference measurements / Akram Afifi in Geomatica, vol 68 n° 3 (September 2014)PermalinkA high-quality, homogenized, global, long-term (1993–2008) DORIS precipitable water data set for climate monitoring and model verification / Olivier Bock in Journal of geophysical research : Atmospheres, vol 119 n° 12 (2014)PermalinkPermalinkComparaison des dendromètres Vertex III et Trupulse 200b pour la mesure de la hauteur totale des arbres / Sylvain Gaudin in Revue forestière française, vol 66 n° 2 (mars - avril 2014)PermalinkPermalinkCalibration of the clock-phase biases of GNSS networks: the closure-ambiguity approach / A. Lannes in Journal of geodesy, vol 87 n° 8 (August 2013)PermalinkEffects of national forest inventory plot location error on forest carbon stock estimation using k-nearest neighbor algorithm / Jaehoon Jung in ISPRS Journal of photogrammetry and remote sensing, vol 81 (July 2013)PermalinkImpact of seasonal station motions on VLBI UT1 intensives results / Zinovy Malkin in Journal of geodesy, vol 87 n° 6 (June 2013)PermalinkGeometric calibration of a terrestrial laser scanner with local additional parameters: An automatic strategy / D. Garcia-San-Miguel in ISPRS Journal of photogrammetry and remote sensing, vol 79 (May 2013)PermalinkA laser scanning-based method for fast estimation of seismic-induced building deformations / Arianna Pesci in ISPRS Journal of photogrammetry and remote sensing, vol 79 (May 2013)PermalinkAccuracy assessment of commercial self-calibrating bundle adjustment routines applied to archival aerial photography / Manuel Angel Aguilar in Photogrammetric record, vol 28 n° 141 (March - May 2013)PermalinkGSICS inter-calibration of infrared channels of geostationary imagers using Metop-IASI / Tim J. Hewison in IEEE Transactions on geoscience and remote sensing, vol 51 n° 3 Tome 1 (March 2013)PermalinkOverview of Intercalibration / Gyanesh Chander in IEEE Transactions on geoscience and remote sensing, vol 51 n° 3 Tome 1 (March 2013)PermalinkFirst, do no harm : Eliminating systematic error in analytical results of GIS applications / Nicholas Chrisman (2013)PermalinkGlobal height system unification with GOCE: a simulation study on the indirect bias term in the GBVP approach / C. Gerlach in Journal of geodesy, vol 87 n° 1 (January 2013)PermalinkManual of photogrammetry, sixth edition / J. Chris Mcglone (2013)PermalinkPermalinkPermalink