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Einfluß von Auflasteffekten auf präzise GPS-Messungen / Rolf Dach (2000)
Titre : Einfluß von Auflasteffekten auf präzise GPS-Messungen Titre original : [Influence des effets de surcharge sur les mesures précises par GPS] Type de document : Thèse/HDR Auteurs : Rolf Dach, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 519 Importance : 134 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9558-8 Note générale : Bibliographie 5 PAGES Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] données GPS
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] surcharge océanique
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) The Global Positioning System (GPS) has entered many sectors of the Geodesy. The accuracy of the analysis results could be greatly improved by developments of the receiver technology, the analysis modeling techniques as well as by the continuous work of international, scientific services, e.g. the International GPS Service (IGS). This leads to the fact that phenomena, mostly neglected up to now, attain the range of verifiability. An example for this is the vertical, loading deformation of the earth crust induced by the ocean tides, the vertical ocean loading effect. The subject of this thesis is the question, if, and to what degree the results from an analysis meeting the highest requirements of accuracy, existing, e.g., in the field of geodynamics, axe affected by the vertical ocean loading effect. Therefore, the investigations are mainly focused on the height component. Since it is known from experience, that solutions for the vertical component are heavily affected by the influence of the multipath, the selection of the elevation mask, the influence of the antenna phase center variation, and related effects, corresponding investigations are included into the thesis. As a result of this analysis, it can be concluded that it is possible to verify the vertical ocean loading effect in GPS data and to validate corresponding models using GPS measurements. Therefore, an adequate modeling of the ocean loading effect is recommended for the high accuracy GPS analysis. Provided that GPS observations are available over 24 hours and a sufficient number of observations can be included in the solution, the impact of neglected ocean loading effect on station heights and their repeatibilities may be low. On the other hand, the influence on non geometric results can become large if they are correlated with the station height and if they are to be obtained with a high resolution in time. Numéro de notice : 69614 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62244 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 69614-01 30.61 Livre Centre de documentation Géodésie Disponible 69614-02 30.61 Livre Centre de documentation Géodésie Disponible
Titre : Elements of GPS precise point positioning Type de document : Thèse/HDR Auteurs : Boonsap Witchayangkoon, Auteur ; Alfred Leick, Directeur de thèse Editeur : Maine [Etats-Unis] : University of Maine Année de publication : 2000 Importance : 286 p. Note générale : bibliographie
A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (in Spatial Information Science and Engineering)Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] éphémérides de satellite
[Termes IGN] filtre de Kalman
[Termes IGN] géodésie spatiale
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] Global Positioning System
[Termes IGN] horloge
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] marée océanique
[Termes IGN] orbite
[Termes IGN] positionnement ponctuel précis
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] récepteur bifréquence
[Termes IGN] récepteur monofréquence
[Termes IGN] surcharge atmosphérique
[Termes IGN] surcharge océanique
[Termes IGN] tectonique des plaquesRésumé : (auteur) The International GPS Service (IGS) now regularly makes accurate GPS ephemeris and satellite clock information available over the Internet. The satellite coordinates are given in the International Terrestrial Reference Frame (ITRF). This thesis investigates Precise Point Positioning (PPP) using dual and single frequency pseudorange and carrier phase observations. Both the static and kinematic modes are investigated. The static PPP solution examples use six-hour data sets from four stations. The observations were made while Selective Availability (SA) was active and after it had been discontinued. The static solutions agree to within 10 cm with published coordinates or with solutions obtained from the Jet Propulsion Laboratory (JPL) PPP Internet service. The kinematic solutions show a discrepancy of less than one meter, mostly around half a meter. For observations with low multipath, the research shows that single-frequency ionosphere-free PPP solutions are equivalent to the dual-frequency solutions. In case of single-frequency observations the pseudorange dominates the solution. Using a priori tropospheric information does not seem to improve dual-frequency PPP solutions as compared to the case when the vertical tropospheric delay is estimated as part of the Kalman filter solution. However, a priori tropospheric information seems to provide benefits to single-frequency kinematic PPP. The Saastamoinen model is used when computing the zenith tropospheric delay. In all cases, the Neill's mapping function is applied. The studies show high correlation between receiver clock and the up coordinate. The troposphere has a high negative correlation with receiver clock and the up coordinate. However, the troposphere is more correlated with the receiver clock than the up component. All solutions incorporate corrections for solid earth tides, relativity, and satellite antenna phase center offsets. Corrections have not been applied for the phase wind-up angle. The widelane and ionospheric functions are used to detect and fix cycle slips in a semigraphical manner. Since even a single cycle slip significantly falsifies PPP solutions, it is suggested that between-satellite carrier phases be used as another way of detecting slips (now since SA has been discontinued). The software consists mostly of highly modular Mathcad functions that form an excellent base for continued research of PPP. Note de contenu : 1. Introduction
1.1. Research goals
1.2. Motivation
1.3. Previous relevant works
1.4. Approach
1.5. Thesis organization
2. Background
2.1. The GPS system
2.2. The GLONASS system
2.3. Components of PPP
3. Geophysical models
3.1. Deformable Earth
3.2. Solid Earth tides
3.3. Ocean loading
3.4. Plate tectonic motion
3.5. Atmospheric tides
4. International terrestrial reference frame (ITRF)
4.1. General statements on reference frames
4.2. The ITRF
4.3. Transformation between ITRFs
4.4. Orientation and origin of the ITRF
4.5. The draft ITRF-2000 reference frame
4.6. GPS WGS-84
4.7. Agreement between WGS-84 and ITRF
5. Troposphere and ionosphere
5.1. Standard atmosphere
5.2. Troposhpere
5.3. Ionosphere
6. Precise IGS orbit and satellite clock
6.1. IGS orbital analysis and its products
6.2. The SP3 ephemeris
6.3. Lagrange interpolation
7. Mathematical implementations
7.1. Dilution of precision
7.2. Cycle slip detection and removal
7.3. Kalman filter
8. Numerical study and results
8.1. Data sets
8.2. A priori Kalman filter settings
8.3. Analysis Example
8.4. Experiments
9. Conclusions and recommendations
9.1. Conclusions
9.2. RecommendationsNuméro de notice : 19800 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Note de thèse : PhD thesis : Spatial Information Science and Engineering : Maine : 2000 Organisme de stage : The University of Maine DOI : sans En ligne : https://www.academia.edu/583010/Elements_of_GPS_precise_point_positioning Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85126 Documents numériques
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Elements of gps precise point positioningAdobe Acrobat PDF
Titre : IERS standards (1996) Type de document : Monographie Auteurs : D.D. Mccarthy, Éditeur scientifique Editeur : Paris, Meudon et Nançay : Observatoire de Paris Année de publication : 1996 Collection : IERS Technical note num. 21 Importance : 95 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] éphémérides de satellite
[Termes IGN] International Earth Rotation Service
[Termes IGN] marée océanique
[Termes IGN] marée terrestre
[Termes IGN] modèle de géopotentiel
[Termes IGN] propagation troposphérique
[Termes IGN] surcharge océanique
[Termes IGN] système de référence céleste
[Termes IGN] système de référence géodésique
[Termes IGN] système de référence terrestre conventionnel
[Termes IGN] transformation de coordonnéesIndex. décimale : 30.10 Systèmes de référence et réseaux géodésiques Numéro de notice : 14526 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40573 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14526-01 30.10 Livre Centre de documentation Géodésie Disponible Documents numériques
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14526_iers-tn21.pdfAdobe Acrobat PDF Untersuchungen zu Erddeformationsmodellen für die Auswertung von geodätischen VLBI-Messungen / Rüdiger Haas (1996)
Titre : Untersuchungen zu Erddeformationsmodellen für die Auswertung von geodätischen VLBI-Messungen Titre original : [Recherches sur les modèles de déformation de la terre pour l'utilisation des mesures géodésiques d'interférométrie de très longue base] Type de document : Thèse/HDR Auteurs : Rüdiger Haas, Auteur Editeur : Francfort sur le Main : Institut für Angewandte Geodäsie Année de publication : 1996 Collection : DGK - C Sous-collection : Dissertationen num. 466 Importance : 103 p. Format : 21 x 30 cm Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données ITGB
[Termes IGN] interférométrie à très grande base
[Termes IGN] marée terrestre
[Termes IGN] résonance
[Termes IGN] rotation de la Terre
[Termes IGN] surcharge atmosphérique
[Termes IGN] surcharge océaniqueIndex. décimale : 30.63 Télémétrie laser sur satellite, Télémétrie laser sur lune, VLBI Résumé : (Auteur) Within the last 20 years geodetic Very Long Baseline Interferometry [VLBI] has been developed as an important technique for geodesy and geophysics. The primary purpose of geodetic VLBI is the establishment of terrestrial and celestial reference frames, measurement of present day tectonic motion and monitoring of Earth rotation.
The accuracy in modeling the theoretical observations for the analysis of space geodetic measurements should ideally be higher than the instrumental precision. Latter is for today's VLBI-system in the millimeter range while the accuracy of modeling is in the centimeter range.
For this reason international efforts endeavor to raise the accuracy of modeling to the millimeter level. As part of this effort this thesis investigates the modeling of Earth deformation effects for the analysis of geodetic VLBI observations. Existing theoretical models for Earth tides, ocean loading and atmospheric loading and their actual application in the analysis of VLBI data are considered.
In a first step worst case simulations are computed in order to evaluate the magnitude of the effects when neglecting them in the analysis.
Then parameters of the Earth deformation models are estimated from VLBI data to test the sensitivity of the VLBI observations to these neglections. In the results the theoretically predicted resonance of the Earth tides is clearly visible. However, the empirical resonance period is significantly different from the theoretical one with a tendency towards an independently inferred value from gravimetry. The estimates for ocean loading show a tendency towards the values of a newly developed loading model. Estimates for atmospheric loading show good agreement with theoretical values. Based upon these considerations recommendations for the treatment of Earth deformation effects in the analysis of space geodetic observations are developed.
As a consequence the VLBI analysis software is extended following these recommendations. The results of these extensions are tested in the analysis of VLBI observations in three different VLBI networks. Results for baseline lengths and Earth rotation parameters are compared with the results that are achieved using the standard analysis software. The comparisons show, that short time and long time repeatability of baseline length measurements improves with the use of the extended analysis software. The accuracy of Earth rotation parameters can be improved, too. The use of the extended software removes diurnal and sub diurnal parts from high frequency Earth rotation parameters, which have been misinterpreted as Earth rotation variations.Numéro de notice : 27066 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=56315 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 27066-01 30.63 Livre Centre de documentation Géodésie Disponible A parametrized solid Earth tide model and ocean tide loading effects for global geodetic baseline measurements / H. Scherneck in Geophysical journal international, vol 106 n° 3 (September 1991)
[article]
Titre : A parametrized solid Earth tide model and ocean tide loading effects for global geodetic baseline measurements Type de document : Article/Communication Auteurs : H. Scherneck, Auteur Année de publication : 1991 Article en page(s) : 18 p. ; pp 677 - 694 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] données ITGB
[Termes IGN] données TLS (télémétrie)
[Termes IGN] fonction de Green
[Termes IGN] interférométrie à très grande base
[Termes IGN] ligne de base
[Termes IGN] marée océanique
[Termes IGN] marée terrestre
[Termes IGN] modèle mathématique
[Termes IGN] surcharge océaniqueRésumé : (Auteur) An observation model for earth tide displacements in application to very Long Baseline Interferometry and similar precise geodetic techniques is developed. It incorporates effects from an-elasticity, ellipsoidal figure, and fluid core resonance. Based on a harmonic development of the external potential, the model follows the familiar Love number concept. The transfer function of the earth to each harmonic is formulated in terms of coupled harmonics in the space domain and fulfils the causality condition in the time domain. The aim of accuracy for tide displacements prediction is below 1 mm. Being the major perturbation of the solid earth tide, ocean tide loading effects are computed, and the accuracy of the models involved is discussed. Numéro de notice : A1991-016 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1111/j.1365-246X.1991.tb06339.x Date de publication en ligne : 01/09/1991 En ligne : https://doi.org/10.1111/j.1365-246X.1991.tb06339.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33573
in Geophysical journal international > vol 106 n° 3 (September 1991) . - 18 p. ; pp 677 - 694[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14199-01 30.40 Tiré à part Centre de documentation Géodésie Disponible Earth rotation : theory and observation / Helmut Moritz (1988)PermalinkMethods of tidal loading computation / Trevor Baker in Bulletin international des marées terrestres, n° 94 (juin 1985)Permalink