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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 Quantitative remote sensing of land surfaces / Shunlin Liang (2004)
Titre : Quantitative remote sensing of land surfaces Type de document : Monographie Auteurs : Shunlin Liang, Auteur Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2004 Collection : Wiley Series in Remote Sensing Importance : 534 p. Format : 16 x 24 cm + un cédérom ISBN/ISSN/EAN : 978-0-471-28166-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] correction atmosphérique
[Termes IGN] données 4D
[Termes IGN] image Landsat-TM
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image optique
[Termes IGN] manteau neigeux
[Termes IGN] occupation du sol
[Termes IGN] optique géométrique
[Termes IGN] réflectance du solIndex. décimale : 35.40 Applications de télédétection - généralités Numéro de notice : 20073 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62899 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20073-01 35.40 Livre Centre de documentation Télédétection Disponible
Titre : Troposphere modeling and filtering for precise GPS leveling Type de document : Thèse/HDR Auteurs : Frank Kleijer, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2004 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 56 Importance : 262 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-284-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Rayonnement électromagnétique
[Termes IGN] correction troposphérique
[Termes IGN] filtre de Kalman
[Termes IGN] modèle stochastique
[Termes IGN] nivellement par GPS
[Termes IGN] positionnement par GNSS
[Termes IGN] propagation troposphérique
[Termes IGN] simulation
[Termes IGN] traitement de données GNSS
[Termes IGN] troposphèreIndex. décimale : 24.30 Rayonnement électromagnétique Résumé : (Auteur) Precision : In the Netherlands, a precision of 5 rnm for estimated GPS height differ ences is required to achieve comparable accuracy as geoid height differences. This precision can be achieved for 24-hour data sets when applying a proper modeling. Precise levelling with GPS requires a judicious modeling of tropospheric delays, which has physical, functional, and stochastic aspect.
Modeling aspects : The physical modeling comprises zenith delays for the hydrostatic and wet component and zenith angle dependent mapping functions. Because the amount of water vapor in the atmosphere fluctuates widely and because the water-vapor aspect induced signal delays affect the height component strongly, a-priori modeling of these delays results in an insufficient precision of height differences. Parameterizing the tropospheric delay in the functional model is therefore necessary, at least for medium and long baselines. The observation model can further be strengthened by pseudo-observations. These pseudo-observations may be spatiotemporal constraints on tropospheric delay differences, or constraints on residual slant delays. With the latter type of constraint the isotropy assumption is loosened. An existing theoretical model is revised to obtain the corresponding covariance matrix. The stochastic modeling of both types of constraints is based on the assumption of Kohnogorov turbulence.
Filtering : The observation models can be implemented in a recursive filter like the Kalman Filter or the SRIF Several variations of these filters are described. For fast computations the most suitable recursive filtering technique is the Kalman-Cholesky Filter with pre-elimination of temporal GPS parameters, such as clock errors and ionospheric delays. Some tests and reliability descriptions are worked out for this filter. For practical implementation the temporal behavior of the zenith wet delay is to be assumed a random-walk process, which gives a fair description. The zenith wet delay can be estimated every epoch or every pre-defined batch of epochs.
Impact of model components : The effect of several model components on mainly the height is analyzed by simulation software. Special attention is given to the residual-slant-delay model because it is potentially precision and reliability improving. The impact of this model does however depend on the precision level of the observations and it still needs to be validated. Although observations to low-elevation satellites have a large contribution to the precision of the height, the residual-slant-delay model implies a strong down weighting of observations to satellites below ten degrees elevation. The highest accuracy can be obtained when the phase ambiguities are fixed. Even for long observation time spans this makes a difference of up effect on the formal precision of the height, but they have, a large influence on the precision of the filtered zenith delays. Because overconstraining (with constraints that are too tight) can have a large precision-deteriorating effect, spat iotemporal constraints are not recommended for GPS leveling. Further, short batches are preferred to avoid biases. To prevent the presence of near rank deficiencies, the zenith delays of one station are often fixed. From a precision point of view this is not necessary and is not recommended because this can also introduce biases. Even larger biases can be introduced when the zenith delays of all stations are fixed to their a-priori values. For very short baselines (< ±1 kin), this model is however justifiable because the formal precision improves considerately, keeping the effect of the biases in balance. to 15-20%. Batch size and spatiotemporal constraints turned out to have little effect on the formal precision of the height, but they have, a large influence on the precision of the filtered zenith delays. Because overconstraining (with constraints that are too tight) can have a large precision-deteriorating effect, spat iotemporal constraints are not recommended for GPS leveling. Further, short batches are preferred to avoid biases. To prevent the presence of near rank deficiencies, the zenith delays of one station are often fixed. From a precision point of view this is not necessary and is not recommended because this can also introduce biases. Even larger biases can be introduced when the zenith delays of all stations are fixed to their a-priori values. For very short baselines (< ±1 kin), this model is however justifiable because the formal precision improves considerately, keeping the effect of the biases in balance.Note de contenu : General introduction
I) Troposphere delay modeling for space geodetic measurements
Symbols and units in Part I
3 Introduction to Part I
4 Physics of the atmosphere
5 Zenith-delay models
6 Slant-delay models
7 Azimuthal asymmetry and gradient parameters
8 Conclusions of Part 1
A Temperature lapse rate
B Saastamoinen integrals
C Effective height
Bibliography
II) Paramerization of the tropospheric delay in GPS observation models
Symbols of Part II
9 Introduction to Part II
10 GPS observation equations
11 Eliminating rank deficiencies in troposphere-fixed models
12 Troposphere-float and weighted models
13 Near rank deficiencies
14 Pre-elimination transformations
15 Conclusions of Part II
III) Stochastic modeling of (slant) tropospheric delays observed by GPS
Symbols of Part III
16 Introduction to Part III
17 Power-law processes
18 Stochastic modeling of troposphere constraints
19 Conclusions of Part III
IV) Recursive GPS data processing
Symbols of Part IV
20 Introduction to Part IV
21 Kalman filtering with pre-elimination
22 Pre-elimination in a recursive SRIF
23 Implementation aspects
24 Condition equations, testing, and reliability
25 Conclusions of Part IV
V) Simulations
Symbols of Part V
26 Introduction to Part V
27 Software implementation
28 Means of quality assessment
29 Simulation scenarios
30 The troposphere-fixed model
31 Conclusions of Part V
32 Conclusions and recommendationsNuméro de notice : 16056 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère En ligne : https://ncgeo.nl/downloads/56Kleijer.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55149 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16056-01 30.64 Livre Centre de documentation Géodésie Disponible 16056-02 24.30 Livre Centre de documentation Physique Disponible Documents numériques
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Troposphere modeling and filteringAdobe Acrobat PDF Multipath mitigation: how good can it get with new signals ? / L.R. Weill in GPS world, vol 14 n° 6 (June 2003)
[article]
Titre : Multipath mitigation: how good can it get with new signals ? Type de document : Article/Communication Auteurs : L.R. Weill, Auteur Année de publication : 2003 Article en page(s) : pp 106 - 106 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] bruit blanc
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] code GPS
[Termes IGN] correction du signal
[Termes IGN] densité spectrale de puissance
[Termes IGN] signal GPS
[Termes IGN] trajet multipleRésumé : (Auteur) Answer: The winner of the 1971 Nobel Prize for Physics. The question? Who defined the most important signal parameter for controlling GPS multipath? The British/Hungarian physicist Dennis Gabor won the prize for the invention of holography. However, Gabor was also one of a handful of mathematicians and scientists who developed communication theory during the 1940s. Communication theory, also called information theory, is the branch of mathematics that deals with the efficient and accurate transmission of information-bearing signals from one place to another. Key to the theory is the concept of signal bandwidth. Now bandwidth can be defined in a number of different ways, but the particular bandwidth named after Cabor determines, in part, how accurately a GPS receiver can measure pseudorange or carrier phase in the presence of multipath. The Gabor bandwidth is determined by the particular shape of the signal's power spectral density function, and the larger the bandwidth the more resistant is the signal to multipath. The GPS receiver must have a processor that takes advantage of this resistance to provide measurements with minimal multipath contamination. Here, Dr Lawrence Weill outlines an implementation of a multipath mitigation algorithm based on the statistical theory of maximum likelihood and describes its expected performance with the new GPS signals soon to be available - signals characterized by a higher Cabor bandwidth than those currently transmitted. Numéro de notice : A2003-424 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26504
in GPS world > vol 14 n° 6 (June 2003) . - pp 106 - 106[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-03061 RAB Revue Centre de documentation En réserve L003 Disponible 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 Méthode de correction des effets troposphériques en interferométrie différentielle multi date / F. Chaabane in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 170 (Avril 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)PermalinkPermalinkIncorporating surface emissivity into a thermal atmospheric correction / N.A. Brunsell in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 12 (December 2002)PermalinkRadiofrequency interference and GPS: a growing concern / F. Butsch in GPS world, vol 13 n° 10 (October 2002)PermalinkPermalinkOn the accuracy of kinematic carrier phase GPS for airborne mapping / A.M. Bruton in Geomatica, vol 55 n° 4 (December 2001)PermalinkAirborne Kinematic GPS atmospheric effects a limiting factor / K. de Jong in Geoinformatics, vol 3 n° 4 (01/06/2000)PermalinkIntroductory remote sensing / P.J. Gibson (2000)PermalinkPräzise Positionierung in regionalen GPS-Referenzstationsnetzen / Lambert Wanninger (2000)Permalink