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Affiner la recherche Interroger des sources externesProceedings of the IERS Workshop on site co-location, Matera, Italy, 23 - 24 October 2003 / Bernd Richter (2005)
Titre : Proceedings of the IERS Workshop on site co-location, Matera, Italy, 23 - 24 October 2003 Type de document : Actes de congrès Auteurs : Bernd Richter, Éditeur scientifique ; Wolfgang R. Dick, Éditeur scientifique ; W. Schwegmann, Éditeur scientifique Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2005 Collection : IERS Technical note, ISSN 1019-4568 num. 33 Conférence : IERS 2003, Workshop on site co-location 23/10/2003 24/10/2003 Matera Italie Importance : 148 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-793-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] co-positionnement
[Termes IGN] station de référenceNote de contenu : Preface
Co-location sites in ITRF
Ø ITRF, Combinations and Site Co-locations / Claude Boucher
Ø ITRF and Co-location Sites / Zuheir Altamimi
Ø Status of the International GPS Service in Terms of Co-Location and Local Ties / Angelyn W. Moore
Ø Co-Location and Local Tie Information at the International Laser Ranging Service (ILRS) / Carey Noll
Ø Local Ties at IVS Sites / Axel Nothnagel
Ø Co-locations and Monumentation in the DORIS Network / Hervé Fagard
Ø Analysis of Local Ties from Multi-year Solutions of Different Techniques / Manuela Krügel and Detlef Angermann
Site Surveys
Ø Surveying the GPS-VLBI Eccentricity at Medicina: Methodological Aspects and Practicalities / Luca Vittuari, Pierguido Sarti, Patrick Sillard, Paolo Tomasi, and Monia Negusini
Ø Precision Surveys at Australian Geodetic Observatories / Gary Johnston, John Dawson, and Bob Twilley
Ø The 2002 Local Tie Survey at the Onsala Space Observatory / Rüdiger Haas and Cornelia Eschelbach
Ø Local Ties Between the Reference Points at the Fundamentalstation Wettzell / Wolfgang Schlüter, Rudolf Zernecke, Swetlana Becker, Thomas Klügel, and Daniela Thaller
Ø GPS Monitoring of the Footprint Network of the Fundamental Station Wettzell / Wolfgang Schlüter, Markus Rothacher, and Veit Lechner
Ø Local Ties Between the Reference Points at the Transportable Integrated Geodetic Observatory (TIGO) in Concepcion/Chile / Wolfgang Schlüter, Hayo Hase, Rudolf Zernecke, Swetlana Becker, Thomas Klügel, and Daniela Thaller
Ø Determination of Local Ties at Ny-Ålesund / Christoph Steinforth, Rüdiger Haas, Martin Lidberg, and Axel Nothnagel
Ø Activities of the IGN Special Works Department / Thierry Person and Valérie Michel
Ø Hartebeesthoek Co-location Survey / Valérie Michel, Georgia Roesch, and Jim Long
Ø Some Do's and Don't's in Terrestrial Surveying of Site Excentricities / Axel Nothnagel
Ø Co-location Surveys & Results in GSI's Space Geodetic Network / Shigeru Matsuzaka, Hiromitchi Tsuji, Yuki Hatanka, and Kazuhiro Takashima
Analysis and SINEX
Ø Terrestrial Data Analysis and SINEX Generation / Pierguido Sarti and Detlef Angermann
Ø The Determination of Telescope and Antenna Invariant Point (IVP) / John Dawson, Gary Johnston, and Bob Twilley
Reporting
Ø The Australian Survey Report Format / Gary Johnston, Jim Steed, and John Dawson
Ø Layout of Local Tie Report / Axel Nothnagel
Ø RecommendationsNuméro de notice : 14604 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes En ligne : https://www.iers.org/IERS/EN/Publications/TechnicalNotes/tn33.html?nn=94912 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34674 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 14604-01 CG2003 Livre Centre de documentation Congrès Disponible Documents numériques
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Titre : Ein eingebettetes ExpertSystem zur Automatisierung der VLBI-Auswertung Titre original : An embedded expert system for the automation of the VLBI data analysis Type de document : Monographie Auteurs : W. Schwegmann, Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2004 Collection : Mitteilungen des Bundesamtes für Kartographie und Geodäsie, ISSN 1436-3445 num. 30 Importance : 178 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-880-6 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse de données
[Termes IGN] données ITGB
[Termes IGN] système expertIndex. décimale : 30.63 Télémétrie laser sur satellite, Télémétrie laser sur lune, VLBI Résumé : (Auteur) Since its first application in the seventies geodetic Very Long Baseline Interferometry (VLBI) has become an important technique for geodesy, astronomy and geophysics. The main focus of geodetic VLBI is the realization of terrestrial and celestial reference frames, measurement of present day tectonic motion as well as monitoring of Earth rotation. Among the geodetic space techniques only VLBI is capable of deriving at the same time all Earth orientation parameters over a longer time span without any hypotheses. The main disadvantage compared to other geodetic space techniques is the delay between the time of observation and the availability of results. One reason is the complicated analysis procedure, requiring well-founded expertise. In addition, the automation of the VLBI analysis procedure should receive more attention considering the steadily increasing amount of VLBI experiments. Because of the complicated analysis procedure, which is highly interactive and requires a lot of expert knowledge, the automation can hardly be achieved applying only conventional programming techniques.
The goal of this thesis is the design and implementation of a system to automate the entire VLBI analysis procedure. On the one hand this allows to close the gap between the time of observation and the availability of results, on the other hand the few existing experts will be relieved from their routine burdens. To achieve this, knowledge-based methods from the field of research of artificial intelligence are used. An Intelligent Assistant for Data Analysis in VLBI (IADA) is developed as an embedded expert system. Expert systems are software systems that are designed to reproduce the special knowledge and the expert's capability of reasoning within a narrow application area. Thus, expert systems make use of knowledge-based methods that allow the representation and processing of knowledge. Based on the explicit utilisation of the expert knowledge needed for the VLBI data analysis the automation of the analysis procedure can be realized. The term ,embedded" is of particular interest, because embedding expert systems in the existing data processing environment is critical for the success of such a system. Embedding IADA in the existing analysis software by building a powerful interface guarantees the automation of the whole VLBI analysis procedure. The strong connection between the existing analysis software and the expert system developed here is an important contribution of the thesis, because generally expert systems suffer from the missing connections to the existing data processing environment.
To develop a successful expert system a large number of boundary conditions have to be taken into account. Thus, the fundamentals of expert systems are investigated more extensively. Moreover, the development of the so-called structured model of the VLBI analysis procedure is described in greater detail. Next to the realization as an embedded system this model can be regarded as the most important component for the successful implementation of IADA. The structured model represents the complicated analysis procedure with all the required knowledge and analysis strategies and allows to implement this knowledge within an expert system.
The successful application of IADA in the analysis of about 80 experiments validates the specific approach of this thesis. IADA is the first system that allows the automation of the entire VLBI analysis procedure for any geodetic VLBI experiment. The results can be compared to those obtained by manual analysis by an expert. Thus, in cooperation with the VLBI group of the Federal Agency for Cartography and Geodesy the system is presently being upgraded to an operational system for analysing the so-called INTENSIVE experiments, that are operated four times a week. Finally, this thesis has provided general insights that may be of value for the automation of other complex geodetic problems as well.Numéro de notice : 13205 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54915 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 13205-01 30.63 Livre Centre de documentation Géodésie Disponible
Titre : Proceedings of the IERS Workshop on Combination Research and Global Geophysical Fluids, Bavarian Academy of Sciences, Munich, Germany, 18 - 21 November 2002 Type de document : Actes de congrès Auteurs : Bernd Richter, Éditeur scientifique ; W. Schwegmann, Éditeur scientifique ; Wolfgang R. Dick, Éditeur scientifique Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2003 Collection : IERS Technical note, ISSN 1019-4568 num. 30 Conférence : IERS 2002, Workshop on Combination Research and Global Geophysical Fluids 18/11/2002 21/11/2002 Munich Allemagne OA Proceedings Importance : 235 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-877-6 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] erreur systématique
[Termes IGN] longueur du jour
[Termes IGN] mouvement du pôle
[Termes IGN] orientation de la Terre
[Termes IGN] repère de référence céleste
[Termes IGN] rotation de la Terre
[Termes IGN] vitesseNote de contenu : Introduction
Towards a Rigorous Combination of Space Geodetic Techniques / M. Rothacher
Combination Strategies and Issues for TRF / CRF / EOPs
Ø Combination of Station Positions and Velocities / Z. Altamimi, C. Boucher, H. Drewes, R. Ferland, K. Larson, J. Ray, M. Rothacher
Ø ITRS Center Views on Combination Issues / C. Boucher, Z. Altamimi
Ø Remarks on Some Problems in the Combination of Station Coordinate and Velocity Solutions / H. Drewes, D. Angermann
Ø TRF Combination at NRCan: Status Report / R. Ferland
Ø Celestial Reference Frame Issues / J. Souchay, C. Ma, M. Feissel-Vernier
Ø General Combination of EOP Series / D. Gambis, T. Johnson, R. Gross, J. Vondrak
Ø EOP Alignment Campaign, IDS/IGS/ILRS/IVS EOP Combinations, Systematic Errors / A. Nothnagel, R. Dill, M. Feissel-Vernier, R. Ferland, R. Noomen, P. Willis
Ø Consistency Analysis Between EOP Series and Reference Frames / D. Gambis, C. Bizouard
Issues of a Rigorous Combination
Ø Conventions and Combinations / D. D. McCarthy, G. Petit
Ø Impact of IAU Resolutions on Earth Rotation Parameters / N. Capitaine, D. D. McCarthy
Ø Issues of a Rigorous Combination / J. Ray, S. Y. Zhu
Ø Combination of Multi-Satellite Techniques at the Observation Level / S. Zhu, Ch. Reigber, F.-H. Massmann, H. Neumayer, H. Meixner, F. Flechtner
Ø On Systematic Differences in Individual Solutions and IERS Products / Z. Malkin
Ø Numerical Aspects of Combination at the Observation Equation and Normal Equation Level / M. Gerstl
Ø IERS SINEX Combination Campaign / D. Angermann, D. Thaller, M. Rothacher
Ø Multi-technique Combination of Time Series of Station Positions and Earth Orientation Parameters / Z. Altamimi, C. Boucher
Ø Combination of Loosely Constrained Solutions / G. Bianco, R. Devoti, V. Luceri
Ø IERS SINEX Combination Campaign: First Results at NRCan / R. Ferland
Ø Rank Defect Analysis and Variance Component Estimation for Inter-Technique Combination / R. Kelm
Global Geophysical Fluids
Ø The Global Geophysical Fluids Center (GGFC) of the International Earth Rotation and Reference Systems Service / B. F. Chao, V. Dehant, R. S. Gross, H.-P. Plag, R. D. Ray, D. A. Salstein, T. van Dam, T. van Hoolst, M. M. Watkins, C. R. Wilson
Ø The GGFC Special Bureau for the Atmosphere of the International Earth Rotation and Reference Systems Service / D. A. Salstein
Ø Reliability of Atmospheric Torque for Geodesy / O. de Viron, V. Dehant
Ø Time Variable Atmospheric and Oceanic Signals in Excitation Functions of Polar Motion / J. Nastula, D. A. Salstein, B. Koaczek
Ø The GGFC Special Bureau for the Oceans: Past Progress and Future Plans / R. S. Gross
Ø Comparison of Oceanographic Signals with SLR-Derived Gravity Observations / C. M. Cox, A. Au, J.-P. Boy, B. Chao
Ø Oceanic Excitation of Polar Motion and Nutation: An Overview / A. Brzezinski
Ø Possible Role of the Oceans in the Variations of Length of Day at High Frequencies / T. J. Johnson
Ø The Hydrology Bureau of the Global Geophysical Fluids Center / C. R. Wilson, J. Chen
Ø Time Variable Gravity Field: Using Future Earth Observation Missions for High Frequency De-Aliasing / T. Gruber, T. Peters
Ø GGFC Special Bureau for Tides / R. Ray
Ø Recent Work on Theoretical Modeling of Nutation / J. M. Ferrándiz, A. Escapa, J. F. Navarro, J. Getino
Ø GGFC Special Bureau for the Core / T. Van Hoolst, V. Dehant, W. Kuang
Ø GGFC Special Bureau for Loading: Current Status and Plans / T. Van Dam, H.-P. Plag, O. Francis, P. Gegout
Posters
Ø Time Series of Site Positions and Datum Parameters / D. Angermann, B. Meisel, M. Krügel, H. Müller, V. Tesmer
Ø IVS Pilot Project Tropospheric Parameters / J. Boehm, H. Schuh
Ø SINEX File Implementation in the VLBI Calc/Solve Analysis System / C. Ma, L. Petrov
Ø Some Problems in the IERS Products from User's Point of View / Z. Malkin
Ø Comparison and Combination of the Earth Orientation Parameters Submitted to the IERS Alignment >Campaign 2002 / E. Messerer, J. Boehm, H. Schuh
Ø Combination of Terrestrial Reference Frames and ERP at University of Newcastle / K. Nurutdinov, P. J. Clarke, Ph. Moore
Ø Determination of Station Coordinates and EOP from Combination of Different Techniques / J. Kosteleck, I. Peek
Ø Electromagnetic Core-Mantle Coupling / S. Ponsar, V. Dehant, T. Van Hoolst
Ø Environmental Loadings: Effects on Height and Gravity / S. Zerbini, C. Romagnoli, L. Lago, B. Richter, D. Simon
Ø IDS Analysis Campaign: current combination activity / J. J. Valette, L. Soudarin, Z. Altamimi
Conclusions
Ø Recommendations and Action ItemsNuméro de notice : 14603 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34673
- Combination of Station Positions and Velocities / Zuheir Altamimi (2003)
- ITRS Center Views on Combination Issues / Claude Boucher (2003)
- EOP Alignment Campaign, IDS/IGS/ILRS/IVS EOP Combinations, Systematic Errors / Axel Nothnagel (2003)
- Celestial Reference Frame Issues / Jean Souchay (2003)
- Multi-technique combination of time series of station positions and Earth orientation parameters / Zuheir Altamimi (2003)
- IDS Analysis Campaign: current combination activity / Jean-Jacques Valette (2003)
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Code-barres Cote Support Localisation Section Disponibilité 14603-01 CG2002 Livre Centre de documentation Congrès Disponible Documents numériques
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