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Robust determination of station positions and Earth orientation parameters by VLBI intra-technique combination / S. Böckmann (2012)
Titre : Robust determination of station positions and Earth orientation parameters by VLBI intra-technique combination Type de document : Thèse/HDR Auteurs : S. Böckmann, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2012 Collection : DGK - C Sous-collection : Dissertationen num. 684 Importance : 70 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5096-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse combinatoire (maths)
[Termes IGN] données ITGB
[Termes IGN] interférométrie à très grande base
[Termes IGN] méthode robuste
[Termes IGN] orientation de la Terre
[Termes IGN] valeur aberranteRésumé : (Auteur) In this thesis, it is shown that combining contributions of different VLBI analysis centers, a so called intra-technique combination, improves the robustness and stability of the final VLBI results. For this purpose, a refined combination method has been developed which is in many theoretical and practical aspects superior to combination approaches currently used for comparable geodetic combination tasks. For example, datum-free normal equation systems are used as input, which ensure that the contributions are not deformed by any constraints at all, and the same underlying terrestrial reference frame can be applied during the combination process. Furthermore, a statistically rigorous variance component estimation approach for the relative weighting of the contributions is used. The combination process implies detailed comparisons and analyses of the individual ACs' contributions. From these, as one of the outcomes of this thesis, several systematic differences between the individual contributions were detected and eliminated. The adherence to standards was considerably improved. The combination process itself reduces the "analyst's noise" and damps the impact of outliers. Validations with independent results of other space-geodetic techniques confirm a benefit of up to 15% more accurate results than from individual solutions. Another aspect of this thesis is the general problem of any intra-technique combination, the correlations between the individual contributions. So far, the contributions of different ACs are always treated as independent data sets, although they have been derived from virtually the same set of original observations. It is shown that correlations between the individual ACs' contributions can be determined and rigorously taken in account during the combination process if the combination is performed directly on the level of the observation equations, instead on the level of normal equation systems. The main effect of considering these correlations is that the formal errors of the estimated combined parameters are considerably more realistic, but the parameters as such remain unchanged within their formal errors. Numéro de notice : 14620 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : sans En ligne : https://nbn-resolving.org/urn:nbn:de:hbz:5N-23152 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62671
Titre : Conflation of provisional cadastral and topographical datasets Type de document : Thèse/HDR Auteurs : David Nyangau Siriba, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2011 Collection : DGK - C, ISSN 0065-5325 num. 673 Importance : 120 p. ISBN/ISSN/EAN : 978-3-7696-5085-3 Note générale : Bibliographie
PhD DissertationLangues : Anglais (eng) Allemand (ger) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] appariement de données localisées
[Termes IGN] base de données foncières
[Termes IGN] base de données topographiques
[Termes IGN] cadastre étranger
[Termes IGN] conflation
[Termes IGN] Kenya
[Termes IGN] qualité des données
[Termes IGN] réseau routier
[Termes IGN] transformation géométriqueRésumé : (auteur) This dissertation investigated the use of a data conflation approach to improve the geometric quality of provisional cadastral datasets using existing higher quality topographical datasets. The main idea is that if there are similar features in both the provisional cadastral datasets and topographical datasets, then geometric quality improvement of provisional cadastres is possible through data conflation techniques. A data conflation approach was developed that consists of four main steps: processing, derivation of a road network usually represented implicitly in cadastral datasets, road network matching, and local geometric transformation of the cadastral datasets. Note de contenu : 1. Introduction
1.1. Background and motivation
1.2. Geometric quality improvement of cadastres
1.3. Overwiew of the proposed approach
1.4. Objectives and focus
1.5. Outline of the thesis
2. Land Management and the Cadastral Concept
2.1. The modern land management paradigm
2.2. The cadastral concept
2.3. Casatral boundaries
2.4. Homogeneous cadastral framework
2.5. Evolution of the cadastral concept
3. The Kenyan Cadastre and Modern Land Administration
3.1. Historical outline of the Kenyan cadastre
3.2. Land tenure and land tenure patterns
3.3. The Kenyan cadastre
3.4. Nationwide topographical mapping
3.5. The Kenyan cadastre and modern land administration
3.6. Summary of challenges and suggested solutions
4. Quality Improvement and Spatial Data Integration
4.1. Spatial data quality and uncertainty
4.2. Geometric quality improvement of different cadastral datasets
4.3. Quality improvement of provisional graphical cadastres
4.4. Interoperability and data intergration
4.5. Basic concepts in spatial data integration
4.6. Heterogeneities in spatial data
4.7. Spatial data integration workflow
5. Conflation of Provisional Cadastral Datasets
5.1. Data conflation of graphical cadastres
5.2. Pre-processing
5.3. Derivation of a road network from a cadastral dataset
5.4. Feature matching
5.5. Geometric transformation
5.6. Piece-wise affine transformation
5.7. Assessment of quality improvement
6. Experimentation and Analysis
6.1. Experimental data
6.2. Goal and organization of the analysis
6.3. Derivation of the road polygons
6.4. Road network matching
6.5. Geometric transformation and aligment
7. Conclusion
7.1. Discussion
7.2. OutlookNuméro de notice : 19785 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Note de thèse : PhD Dissertation : : Stuttgart : 2011 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84899 Documents numériques
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Conflation of Provisional Cadastral and Topographical DatasetsAdobe Acrobat PDF Die Entwicklung photogrammetrischer Verfahren und Instrumente bei Carl Zeiss in Oberkochen / Dierk Hobbie (2010)
Titre : Die Entwicklung photogrammetrischer Verfahren und Instrumente bei Carl Zeiss in Oberkochen Titre original : [Le développement de méthodes et d'instruments photogrammétriques chez Carl Zeiss à Oberkochen] Type de document : Monographie Auteurs : Dierk Hobbie, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2010 Collection : DGK - E Sous-collection : Geschichte und Entwicklung der Geodäsie num. 030 Importance : 144 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9673-8 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Photogrammétrie ancienne
[Termes IGN] appareil de restitution
[Termes IGN] caméra numérique
[Termes IGN] chambre de prise de vues argentique
[Termes IGN] DMC
[Termes IGN] image aérienne
[Termes IGN] instrument ancien
[Termes IGN] instrument de photogrammétrie
[Termes IGN] instrumentation Zeiss
[Termes IGN] photogrammétrie aérienne
[Termes IGN] photogrammétrie terrestre
[Termes IGN] photographie aérienne
[Termes IGN] planimat
[Termes IGN] vingtième siècleIndex. décimale : 33.01 Photogrammétrie ancienne (postérieure à 1939 et en bon état) Note de contenu : 1. Einleitung
2. Vorgeschichte
3. Wiederbeginn in Oberkochen
4. Rekonstruktion
4.1 Stereoskope und Luftbildumzeichner
4.2 Radialschlitzstanzen
4.3 Laborgeräte
4.4 stereoplanigraph
5. Ergänzung durch Neukonstruktion
5.1 stereotop
5.2 Entzerrungsgerät SEG
5.3 RMK 21/18 mit TOPAR 4/210
5.4 RMK 15/23 mit PLEOGON 5,6/153
5.5 Statoskop S 2 c
5.6 reduktor
6. Neuentwicklungen nach 1956
7. Luftbildaufnahme
7.1 RMK-Familie mit A-Charakteristik
7.2 Uberweitwinkelkammer RMK A 8,5/23
7.3 Geräte zur Kammersteuerung
7.4 RMK A im Weltraumeinsatz
7.5 Bildwanderungskompensation
7.6 RMK TOP und T-AS
7.7 Bildflugnavigation T-Flight
7.8 DMC
7.9 Kammerkalibrierung
8. Luftbildauswertung photographisch
8.1 Orthoprojektor GlGAS ZEISS (GZ 1)
8.2 Optische Interpolation im GZ l
8.3 Höhendarstellung im GZ l
8.4 ITEK Korrektor EC 5
8.5 ORTHO-3-PROJEKTOR
8.6 orthocomp Z 2
8.7 Programmsystem HIFI
8.8 PHODIS-OP
9. Luftbildauswertung numerisch
9.1 Koordinatenregistrierung
9.2 Präzisions-Stereokomparator PSK
9.3 Präzisionskomparator PK l
9.4 Punktmarkiergeräte
10. Luftbildauswertung graphisch
10.1 Prototypentwicklungen 1960- 1963
10.2 Doppelprojektor DP
10.3 Planimat
10.4 Planicart
10.5 Planitop
10.6 Graphische Ausgabe
10.7 Graphische Datenerfassung
11. Luftbildauswertung analytisch
11.1 stereocord
11.2 planicomp C 100
11.3 Weiterentwicklung C 100
11.4 "Z1P" - zeiss-intergraph Projekt
11.5 planicomp P-Serie
12. Luftbildauswertung digital
12.1 photoscan
12.2 scai
12.3 phodis
13. Terrestrische Photogra mmetrie
13.1 Terrestrische Messkammern
13.2 terragraph
13.3 Sonstiges
14. Sonderanwendungen
14.1 Ballistische Messkammern
14.2 Stereo-Röntgenkomparator StR
14.3 Differenzen-Sichtprüfgerät vitest
14.4 GEOS-1
15. Fernerkundung & Aufklärung
15.1 Reihenbildner KRb und TRb
15.2 Modulares Aufklärungssystem KS-153
15.3 Fernerkundung
16. Die Photogrammetrie-Entwicklung und ihre Mitarbeiter
16.1 Die Entwicklung in einigen Zahlen
16.2 Patente und Publikationen
16.3 Sonstige Tätigkeiten
16.4 Mitarbeiter und Abteilungen
16.5 Der Weg in die Zukunft
17. LiteraturverzeichnisNuméro de notice : 13938 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62583 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13938-01 33.01 Livre Centre de documentation En réserve M-103 Disponible Physically consistent system model for the study of the Earth's rotation, surface deformation and gravity field parameters / A. Hense (2009)
Titre : Physically consistent system model for the study of the Earth's rotation, surface deformation and gravity field parameters : scientific results of the DFG project Type de document : Monographie Auteurs : A. Hense, Auteur ; J. Sündermann, Auteur ; Hermann Drewes, Auteur ; et al., Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2009 Collection : DGK - B Sous-collection : Angewandte Geodäsie num. 317 Importance : 53 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8596-1 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] circulation atmosphérique
[Termes IGN] circulation océanique
[Termes IGN] déformation de la croute terrestre
[Termes IGN] modèle hydrographique
[Termes IGN] modèle physique
[Termes IGN] pesanteur terrestre
[Termes IGN] rotation de la Terre
[Termes IGN] surcharge océanique
[Termes IGN] terme de ChandlerIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) [introduction] This report is the final report of a serie of projects which studied the Earth's rotational parameters angular momentum, tensor of inertia as well as related variables of the Earth's gravitational field. A system view has been taken by trying to incorporate the contributions from the various subsystems of the Earth system in a physically consistent way. This introduction will highlight the project history and performance since 1996 and the state of the art in 2000. Note de contenu : 1. Introduction
1.1 The projects
1.2 Historical overview and motivations
2. Models of subsystems
2.1 Atmosphere models ECHAM
2.1.1 ECHAM5
2.1.2 Stand-alone atmosphere 20th century simulation
2.1.3 Results
2.2 Ocean model OMCT
2.3 Hydrological Discharge Model HDM
2.3.1 Continental hydrology modelling
2.3.1.1 SLS model component
2.3.1.2 HDM model component
2.3.1.3 Atmospheric forcing data
2.3.2 Results
2.3.2.1 Implementation of a 3-D relief model
2.3.2.2 Calculation of gravity field coefficients
2.3.2.3 Test simulations and validation of continental discharge with ECHAM4 and NCEP
2.3.2.4 Verification of simulated continental runoff (control runs)
2.3.2.5 Interface adaptation and verification of mass conservation at the boundaries in the coupled model system
2.3.2.6 Validation and analysis of continental water mass transports of ECOCTH
2.3.2.7 Statistical analysis and validation of simulated gravity field variations
2.3.2.8 Global water balance
2.3.3 Summary
3. Models of the coupled system
3.1 Coupled atmosphere-hydrosphere model ECOCTH
3.1.1 Model description
3.1.2 Validation
3.1.2.1 The lunisolar ocean tides
3.1.2.2 Global ocean circulation
3.1.2.3 Tropical variability and global warming
3.1.3 Results
3.1.3.1 Inter-annual variations and secular trends in length of day
3.2 Dynamic model of Earth rotation, gravity and surface deformation DyMEG
3.2.1 Numerical solution of the Liouville differential equation
3.2.2 Inverse model for surface deformations of the solid Earth due to mass loads
4. Results for Earth rotation, surface deformation and gravity
4.1 Validation of DyMEG with NCEP and ECCO
4.2 Results of DyMEG with ECOCTH forcing
5. Scientific highlights
5.1 Tidal mixing
5.1.1 Tidal mixing in OMCT2
5.1.2 Effect of tidal mixing on ocean water mass properties
5.2 Secular and decadal variations
5.2.1 Coupled simulation of Earth Rotation Parameters
5.2.2 Axial AAM long-term trends in 21st century scenario runs
5.3 Forcing mechanisms of the Chandler oscillation
5.3.1 Atmospheric and hydrospheric excitation of the Chandler oscillation
5.3.2 Noise as excitation mechanism of the Chandler oscillation
6. Conclusions and outlook
7. ReferencesNuméro de notice : 15454 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62723 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15454-01 30.40 Livre Centre de documentation Géodésie Disponible Multi-dimensional B-spline modeling of spatio-temporal Ionospheric signals / C. Zeilhofer (2008)
Titre : Multi-dimensional B-spline modeling of spatio-temporal Ionospheric signals Type de document : Monographie Auteurs : C. Zeilhofer, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2008 Collection : DGK - A Sous-collection : Theoretische Geodäsie num. 123 Importance : 86 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8203-8 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] B-Spline
[Termes IGN] décomposition
[Termes IGN] géodésie spatiale
[Termes IGN] ionosphère
[Termes IGN] modélisation 3D
[Termes IGN] signal GPS
[Termes IGN] traitement du signalIndex. décimale : 24.20 Traitement du signal Résumé : (Auteur) Nowadays, ionospheric phenomena can be monitored globally from data of various satellite missions with an unprecedented accuracy. In many applications, like modeling the equatorial anomaly, regional processes are of special interest. To study regional phenomena multi-dimensional mathematical tools may be applied. In this report a regional multi-dimensional representation based on quadratic B-splines is derived and applied to spatio-temporal data sets.
At first the theory of a multiscale analysis is introduced, i.e. the decomposition of signals into a smoother version arid a number of detail signals for the 1-dimensional case. To develop a multiscale analysis we introduce B-splines as scaling functions. The corresponding base functions, i.e. the B-spline wavelets can be computed via the so-called two-scale relations from the scaling functions. Series coefficients of the B-spline expansion can be computed by evaluating inner products using the dual base functions or by applying parameter estimation procedures. To generalize a 1-dimensional B-spline representation to the multi-dimensional case tensor product techniques are used. A data compression algorithm is derived from the multiscale analysis, i.e. we gain a tool to handle huge digital data sets.
In our applications we decompose ionospheric functions, e.g. the electron density or the vertical total electron content, into a reference part and an unknown correction term. We apply our approach regionally to the correction term, i.e. we expand it in a multi-dimensional series expansion in terms of B-splines. Since our observations are located rather unbalanced with respect to space and time finer structures are modelable only in regions with a sufficient number of observation sites. The multiscale analysis derived from the wavelet analysis allows monitoring the ionospheric signals at different resolution levels.Numéro de notice : 15413 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62713 Réservation
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