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GPS satellite surveying / Alfred Leick (2004)
Titre : GPS satellite surveying Type de document : Guide/Manuel Auteurs : Alfred Leick, Auteur Mention d'édition : 3 Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2004 Importance : 436 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-0-471-05930-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] compensation de coordonnées
[Termes IGN] compensation Lambda
[Termes IGN] compensation par moindres carrés
[Termes IGN] correction ionosphérique
[Termes IGN] correction troposphérique
[Termes IGN] Galileo
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] mesurage de phase
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] orbitographie
[Termes IGN] phase GPS
[Termes IGN] positionnement absolu
[Termes IGN] positionnement cinématique
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement dynamique
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] positionnement statique
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] signal GPS
[Termes IGN] surface de référence
[Termes IGN] système de positionnement par satellites
[Termes IGN] système de référence géodésique
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) This new edition is thoroughly updated to reflect extensive changes in Global Positioning Systems, and is the first GPS book to integrate data from Russian GLONASS and European GALILEO GPS systems into U.S GPS data and procedures. Note de contenu : Preface. Acknowledgements. Abbreviations.
Chapter 1. Introduction.
Chapter 2. Geodetic Reference Systems.
Chapter 3. Satellite Systems.
Chapter 4. LSQ Adjustments.
Chapter 5. Pseudorange and Career Phase Observiables.
Chapter 6. Troposphere and Ionosphere.
Chapter 7. Processing Pseudoranges and Career Phases.
Chapter 8. Network Adjustments.
Chapter 9. Two-Dimensional Geodetic Models.
Appendix A. General Background.
Appendix B. The Ellipsoïd.
Appendix C. Conformal Mapping. References. Spelling Dictionary.Numéro de notice : 12163 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54566 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 12163-01 30.61 Livre Centre de documentation Géodésie Disponible 12163-04 30.61 Livre Centre de documentation Géodésie Disponible 12163-02 DEP-ELG Livre Marne-la-Vallée Dépôt en unité Exclu du prêt 12163-03 DEP-ELG Livre Marne-la-Vallée Dépôt en unité Exclu du prêt Ionospheric effects on SAR imaging: a numerical study / J. Liu in IEEE Transactions on geoscience and remote sensing, vol 41 n° 5 (May 2003)
[article]
Titre : Ionospheric effects on SAR imaging: a numerical study Type de document : Article/Communication Auteurs : J. Liu, Auteur ; Y. Kuga, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 939 - 947 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] correction ionosphérique
[Termes IGN] dégradation d'image
[Termes IGN] image radar moirée
[Termes IGN] propagation ionosphériqueRésumé : (Auteur) There has been an increasing interest in the use of spaceborne very high frequency ultra high frequency (VHFUHF) synthetic aperture radar (SAR) for measuring forest biomass and for detecting underground facilities. The propagation characseristics of the lowfrequency electromagnetic wave are severely affected by the ionosphere. Recently, Faraday rotation effects and SAR image degradation have been studied using an analytical model and a homogeneous ionosphere. In this paper, a numerical model is developed to investigate the SAR image degradation caused by an inhomogeneous ionosphere. Both horizontal and a vertical structures of the ionosphere are considered in this model. Three different cases are studied. The first is a vertically homogemous ionosphere, where the simulation condition is the same as in the analytical study by Ishimaru and others. The second is a vertical profile, which is introduced using the Chapman formula. The raybending effect is added for the ionosphere with a layered structure. Finally, both the vertical profile in electron density and the horizontal gradient in total electron content are considered b the simulation. Simulation results show good agreement with the theoretical analysis under the same conditions of the ionosphere. When both horizontal and vertical structures and the inhomogeneity of the ionosphere are considered in the model, the simulation result shows further image degradation and shift caused by the raybending effect. The simulation results also show the strong frequency dependence of the SAR image resolution. Numéro de notice : A2003-203 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.811813 En ligne : https://doi.org/10.1109/TGRS.2003.811813 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22499
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 5 (May 2003) . - pp 939 - 947[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-03051 RAB Revue Centre de documentation En réserve L003 Disponible GPS : Theory, algorithms and applications / Guochang Xu (2003)
Titre : GPS : Theory, algorithms and applications Type de document : Guide/Manuel Auteurs : Guochang Xu, Auteur Mention d'édition : 1srt edition Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2003 Importance : 315 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-3-540-67812-0 Note générale : DOCUMENT RARE - voir aussi edition 2016 https://link.springer.com/book/10.1007/978-3-662-50367-6 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] anti-leurrage
[Termes IGN] centre de phase
[Termes IGN] compensation par moindres carrés
[Termes IGN] effet atmosphérique
[Termes IGN] élément orbital
[Termes IGN] erreur systématique
[Termes IGN] filtre de Kalman
[Termes IGN] GPS en mode cinématique
[Termes IGN] GPS en mode statique
[Termes IGN] horloge atomique
[Termes IGN] orbite képlerienne
[Termes IGN] orbitographie
[Termes IGN] positionnement cinématique
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] résolution d'ambiguïté
[Termes IGN] système de coordonnées
[Termes IGN] traitement de données GNSS
[Termes IGN] trajet multipleIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) This reference and handbook describes Global Positioning system (GPS) theory, algorithms and applications. It is primarily based on source-code descriptions of the KSGSoft program developed by the author at the GFZ in Postdam. The theory and algorithms are revised and extended for a new development of a multiple functional GPS software. New concepts suchs as the unified GPS data processing method and ambiguity-ionospheric algorithm, as well as general ambiguity search criteria, are reported for the first time. Mathematically rigorous, the book begins with the basics of coordinate and time systems and satellite orbits, as well as GPS observables, and deals with topic such as physical influences, observation equation, adjustment and filtering, ambiguity resolution, data processing, kinematic positioning, and, the determination of perturbed orbits. Numéro de notice : 15064 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55056 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15064-01 30.61 Livre Centre de documentation Géodésie Disponible 15064-02 DEP-PMA Livre SGM Dépôt en unité Exclu du prêt Zur Bestimmung der GPS-Phasenmehrdeutigkeiten in großräumigen Netzen / K. Wienholz (2003)
Titre : Zur Bestimmung der GPS-Phasenmehrdeutigkeiten in großräumigen Netzen Titre original : [Vers la résolution des ambiguïtés de phase GPS dans les réseaux à grande échelle] Type de document : Thèse/HDR Auteurs : K. Wienholz, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2003 Collection : DGK - C Sous-collection : Dissertationen num. 566 Importance : 102 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5005-1 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] ligne de base
[Termes IGN] logiciel de post-traitement GPS
[Termes IGN] mesurage de phase
[Termes IGN] modèle mathématique
[Termes IGN] phase GPS
[Termes IGN] propagation ionosphérique
[Termes IGN] résolution d'ambiguïté
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) The development and the results of the TUB method are presented in this paper. This special method serves in resolving GPS phase ambiguities in small-range and large-range networks. It is characterized by taking into account the correlates as quality criteria, thus enabling an assessment of the calculated ambiguities. First of all : by simulating an example to mediate the adjustment of conditions between unknown quantities it can be shown that every incorrect condition exerts a major constraint on the adjustment system. This constraint is reflected by the pertaining Lagrange factors (or correlates), the value of which increases rapidly in line with the magnitude of error in the equation of condition. This knowledge can be used in the TUB method to investigate various parameters. However, in this paper the emphasis is on the investigation of ambiguities.
The TUB method is based on a special parameterization of the observation equations so that several unknown parameters are combined in one newly established time-dependent auxiliary parameter and in one timeindependent auxiliary parameter. By reduction of the unknown parameters a stable equation system is brought about which can be solved without resulting in differences and linear combinations. The direct analysis of original phase observations prevents the error-propagation of accidental errors and hence an artificial increase in phase noise. Therefore the confidence intervals, characterized by integer numbers, can be kept rather small. In finding these integer numbers the time-dependent auxiliary parameters must first be separated in different ways, depending on the lengths of the base lines, from the ionospheric refraction. Then the ambiguities in the form of double differences, related to a base satellite and a base station (or in the form of L1/L2 ambiguity pairs), can be solved in an iterative process. As a controlling device equations of condition are formed with the help of L1/L2 ambiguity pairs and inserted in the adjustment process. A subsequent analysis of the correlates gives information about the qualities of the ambiguities found.
To begin with the potential of the TUB method is tested by means of a data set with base line lengths ranging from 13 to 48 km. By analyzing the correlates incorrect double difference ambiguities can be identified and among several integer numbers the correct one is filtered out. In two further nets with base line lengths from 26 to 106 km the influences of various more or less accurate orbits on the parameters of the observation equations are investigated. In the aforementioned examples a resolution of the ambiguities is possible at a success rate of 100 percent while an observation time of about two hours is sufficient. When terrain points are between 700 and 1000 km apart the model shows consider-able inaccuracies. The evaluation of data stemming from various IGS stations evidences that in about 20 percent of all ambiguities integer numbers cannot be found. In these cases the confidence intervals either do not provide any integer number or too many of them. In the latter case there are, instead of a single one, several LI/L2 ambiguity pairs that do not differ very much from one another. When these ambiguity pairs are inserted in the equation system the values of the correlates do not differ very much either. For the time being no satisfactory results can be achieved for base lines ranging between 1000 and 2000 km.
The analysis of the correlates proves to be a useful tool in evaluating the quality of ambiguities. The correlates with the highest values occur when incorrect ambiguities exert major constraints on the equations of condition. In these cases errors can be detected, e.g., those arising from the use of broad-cast ephemerides. When several integer numbers are found in the confidence intervals the values of the correlates suggest values matching the normal equation system. Considerable interdependencies of the equations of condition are evident. Consequently there is an increase in the values that are linked to an incorrect condition via satellite and station. Therefore the correlations between the Lagrange factors should be investigated more closely. It is useful to determine the ambiguities of a data set by observation times of different lengths. By comparing the double difference ambiguities calculated from these solutions an additional examination of the results is made possible. Particularly when base lines of more than 1000 km are used it turns out that with data resulting from shorter observation times integer numbers can be calculated that would either not result at all or only inaccurately from longer measurements. The use of correlates as indicators for incorrect conditions is not only suitable for evaluating ambiguities in GPS analysis. Moreover, all parameters that can be formulated in appropriate conditions may be examined in any case of problems regarding the analysis of data.Numéro de notice : 13191 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54906 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13191-02 30.61 Livre Centre de documentation Géodésie Disponible 13191-01 30.61 Livre Centre de documentation Géodésie Disponible Mapping the low-latitude ionosphere with GPS / M. Fedrizzi in GPS world, vol 13 n° 2 (February 2002)
[article]
Titre : Mapping the low-latitude ionosphere with GPS Type de document : Article/Communication Auteurs : M. Fedrizzi, Auteur ; et al., Auteur Année de publication : 2002 Article en page(s) : pp 41 - 47 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] données GPS
[Termes IGN] électron
[Termes IGN] ionosphère
[Termes IGN] propagation ionosphériqueRésumé : (Auteur) Use of GPS-based techniques to measure total electron count in the ionosphere has provided researchers with a greater understanding of meteorology and atmospheric effects on radio signals. But most of this research has focused on the nothern hemisphere where the GPS monitoring network is dense. Now a group of geophysists is using a brazilian network to produce similar benefits in the southern hemisphere. Numéro de notice : A2002-015 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21932
in GPS world > vol 13 n° 2 (February 2002) . - pp 41 - 47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-02021 RAB Revue Centre de documentation En réserve L003 Disponible Fast precise GPS positioning in the presence of ionospheric delays / Dennis Odijk (2002)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])PermalinkPermalinkMapping and predicting the Earth's ionosphere using the Global Positioning System / Stefan Schaer (1999)Permalink1998 Analysis center workshop proceedings, Darmstadt, February 9-11, 1998 / John M. Dow (1998)PermalinkReal-time estimation of ionospheric delay using GPS measurements / L.S. Lin (1998)PermalinkEtude du comportement du contenu électronique total et de ses irrégularités dans une région de latitude moyenne / René Warnant (1996)PermalinkGenauigkeitssteigerung bei kurzzeit-statischen und kinematischen Satellitenmessungen bis hin zur Echtzeitanwendung / M. Gianniou (1996)PermalinkSéminaire Géodésie Spatiale par méthode dynamique : applications au positionnement Doris, 1. Première partie [du] 4/4/1996 : Géodésie Spatiale par méthode dynamique / Pascal Willis (1996)PermalinkNew GPS measurement modeling techniques of orbit determination and precise kinematic positioning / M. Yang (1995)Permalink