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Schwerefeldfunktionale im Gebirge / J. Flury (2002)
Titre : Schwerefeldfunktionale im Gebirge : Modellierungsgenauigkeit, Messpunktdichte und Darstellungsfehler am Beispiel des Testnetzes Estergebirge Titre original : [Fonction du champ de pesanteur en montagne : exactitude de la modélisation et erreur de représentation, exemple du réseau test des montagnes Estergebirge] Type de document : Thèse/HDR Auteurs : J. Flury, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2002 Collection : DGK - C Sous-collection : Dissertationen num. 557 Importance : 114 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9596-0 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] alpes orientales
[Termes IGN] anomalie de pesanteur
[Termes IGN] Bavière (Allemagne)
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] géoïde gravimétrique
[Termes IGN] géoïde local
[Termes IGN] hauteur ellipsoïdale
[Termes IGN] levé gravimétrique
[Termes IGN] montagne
[Termes IGN] nivellement
[Termes IGN] nivellement par GPSIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) In this work the question is examinated, which geoid accuracies can be achieved from gravity field functions which are measured at discrete, but very dense points. The difficult conditions for the required modelling of the topography in mountainous terrain have been considered.
In the Estergebirge mountains in the Bavarian Alps since the year 1994 a very dense network of gravity measurements, precision levelling, precise GPS height measurements and deflections of the vertical has been created, covering all height zones of the terrain. These measurements and their accuracies are described in this work. From levelling, gravity measurements and GPS measurements height anomalies and geoid heights have been determined, analyzed and compared to the german ECG97 geoid model. A precise modelling of the topographic attraction is described for gravity and the deflections of the vertical, based on a high resolution terrain model and a terrain survey of the very near zone of each data point. After the topographic reduction different disturbing bodies with anomalous densities have been detected, with typical characteristics for mountainous areas. Some of these bodies have been modelled taking into account various geophysical data. The models have been used in an adjustment to determine the densities of the topography and the disturbing bodies.
In the second part a statistical analysis of gravity disturbances from the Estergebirge and from other data sets from the Alps is carried out. Empirical signal covariance functions and spectral representations of signal power are shown. The comparison of the different data sets shows good agreement of signal properties. Using measurements in independent control points realistic errors for the continuous representation of the gravity disturbances have been obtained, depending on the density of data points. It is shown, that for high point densities the high frequent parts of the signal are still dominating the representation error, whereas errors of measurement and modelling play a minor role. The representation error computed for selected data point densities have been propagated to geoid errors and errors of spherical harmonic coefficients. The error volume is used as an intermediate step, assuming homogeneous signal properties all over the earth. By this approach it can be shown, that for a geoid error standard deviation of 1 cm the spacing of gravity measurements may not exceed about 5 km.Numéro de notice : 13161 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54898 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13161-01 30.40 Livre Centre de documentation Géodésie Disponible Die Satellitengradiometriemission GOCE - Theorie, technische Realisierung und wissenschaftliche Nutzung / J. Muller (2001)
Titre : Die Satellitengradiometriemission GOCE - Theorie, technische Realisierung und wissenschaftliche Nutzung Titre original : [La mission satellitaire de gradiométrie GOCE : théorie, réalisation technique et utilisation scientifique] Type de document : Thèse/HDR Auteurs : J. Muller, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2001 Collection : DGK - C Sous-collection : Dissertationen num. 541 Importance : 87 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9580-9 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] GOCE
[Termes IGN] gradiomètre
[Termes IGN] gradiométrie
[Termes IGN] limite de résolution géométrique
[Termes IGN] pesanteur terrestreIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) In 1999, the ESA mission GOCE has been approved, the first satellite mission at all applying gradiometry. The gravity gradients will be observed with an accuracy at the mE-level, which enables the determination of the Earth gravity field with high accuracy. With GOCE, one achieves a geoid error of 1 cm at a spatial resolution of 100 km on the surface of the Earth resp. a gravity anomaly error of less than 1 mGal. Here we describe, how a satellite gradiometry mission works, which payload is absolutely necessary (e.g. accelerometers, star trackers, GPS) and what control systems are required. The formulas to analyse the observations are derived. The effect of the main error sources (e.g. misalignments, scale factor error, pointing error) are estimated and their spectral behaviour as well as their possible effect onto the mission goals are shown. Also the needed calibration strategies are discussed. Additionaly some aspects are addressed, which are important for the realisation of a gradiometer mission, especially for COCE: is a relativistic treatment needed, has one to distinguish between COM and COG, have the third derivatives of the potential to be used in the gradiometer equation, how has the angular velocity about the cross-track axis to be determined, where should a KALMAN-Filter be implemented or which analysis methods for the determination of the Earth gravity field are used ? Finally the wide range of applications for a global gravity field with high spatial resolution is mentioned. Beside geodesy (e.g. leveling with GPS), oceanography (by the combination with altimetry data), solid Earth physics (the gravitational potential as one of the few mirrors in the Earth's interior) and ice research benefit from the GOCE gravity field. Secondary goals are the investigation of sea surface variations and climate models. Numéro de notice : 13065 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54865 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13065-01 30.40 Livre Centre de documentation Géodésie Disponible Combinations of Earth orientation measurements / Richard S. Gross (2000)
Titre : Combinations of Earth orientation measurements : Space99, Comb99, and Pole99 Type de document : Rapport Auteurs : Richard S. Gross, Auteur Editeur : Pasadena : Jet Propulsion Laboratory JPL Année de publication : 2000 Collection : JPL Publications num. 00-5 Importance : 18 p. Format : 22 x 28 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] données GPS
[Termes IGN] filtre de Kalman
[Termes IGN] intégration de données
[Termes IGN] mouvement du pôle
[Termes IGN] orientation de la Terre
[Termes IGN] télémétrie laser sur la Lune
[Termes IGN] télémétrie laser sur satellite
[Termes IGN] temps universelIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) Independent Earth orientation measurements taken by the spacegeodetic techniques of lunar and satellite laser ranging, very long baseline interferometry, and the global positioning system have been combined using a Kalman filter. The resulting combined, Earth orientation series, SPACE99, consists of values and uncertainties for universal. time, polar motion, and their rates that span from September 28.0, 1976 to January 22.0, 2000 at daily intervals. The space-geodetic measurements used to generate SPACE99 have then been combined. with optical astrometric measurements to form two additional combined Earth orientation series: (1) COMB99 consisting of values and uncertainties for universal time, polar motion, and their rates that span from January 20.0, 1962 to January 21.0, 2000 at 5-day intervals, and (2) POLE99 consisting of values and uncertainties for polar motion and its rate that span from January 20, 1900 to January 21,2000 at 30.4375day intervals. Numéro de notice : 68747 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44764 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 68747-01 30.40 Livre Centre de documentation Géodésie Disponible
Titre : High frequency to subseasonal variations in Earth rotation Type de document : Monographie Auteurs : B. Kolaczek, Éditeur scientifique ; Harald Schuh, Éditeur scientifique ; Daniel Gambis, Éditeur scientifique Editeur : Paris, Meudon et Nançay : Observatoire de Paris Année de publication : 2000 Collection : IERS Technical note num. 28 Importance : 90 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] rotation de la Terre
[Termes IGN] variation temporelleIndex. décimale : 30.40 Géodésie physique Note de contenu : Introduction
Updated model of short-period tidal variations in Earth rotation / Ray Richard D., Space Geodesy Branch, NASA Goddard Space Flight, USA
Diurnal and sub-diurnal variations of the Earth rotation / Zharov Vladimir E. (1), Gambis Daniel (2), Bizouard Christian (2),
(1) Sternberg State Astronomical Institute, Moscow, Russia,
(2) Observatoire de Paris, IERS, Paris, France
Estimation of subdiurnal tidal terms in UT1-UTC from VLBI data analysis / Titov Oleg, Saint-Petersburg University, Russia
Interpretation of high frequency polar motion and length of day variations / Arfa-Kaboodvand K.(l), Groten Erwin (1), Varga Peter (2), Zavoti J.(2),
(1) Darmstadt University of Technology, Institute for Physical Geodesy, Germany,
(2) Geodetic and Geophysical Research Institute of Hungarian Acad. of Sciences, Hungary
The short period nutations of the Earth / Souchay Jean (1) and Marta Folgueira (2),
(1) Observatoire de Paris, Paris, France,
(2) Instituto de Astronomia y Geodesia (UCM-CSIC), Madrid, Spain
Short periods in Earth rotation seen in VLBI data analysed by the least-squares collocation method / Titov Oleg(l) and Schuh Harald (2),
(1) Saint-Petersburg University, Russia,
(2) Institut für Geodäsie und Geophysik, Technische Universität Wien, Austria
Contribution of the GPS to monitor Earth Orientation Parameters / Weber Robert (1), Rothacher Markus (2), Beutler Gerhardt (3),
(1) University of Geodesy and Geophysics, TU-Vienna,
(2) Forschungseinrichtung Satellitengeodäsie, TU-Munich, Germany,
(3) Astronomical Institute, University of Berne
High frequency atmospheric excitation of Earth rotation / Brzezinski Aleksander
Space Research Centre, Polish Acad. of Sciences, Warsaw, Poland
Irregulär short period variations in Earth rotation / Kosek Wieslaw
Space Research Centre, Polish Academy of Sciences, Warsaw, Poland
Wavelet analysis of stochastic Signals / Michael Schmidt
Deutsches Geodaetisches Forschungsinstitut, Germany
Abilities of wavelet analysis for investigating short-period variations of Earth rotation / Michael Schmidt, Harald Schuh, Deutsches Geodaetisches Forschungsinstitut, Germany
Comparison between spectro-temporal analysis methods on the Earth rotation Parameters and their atmospheric excitation functions / Kosek Wieslaw (1), Popinski Waldemar (2)
(1) Space Research Centre, Polish Academy of Sciences Warsaw, Poland
(2) Department of Standards, Central Statistical Office, Warsaw, Poland 81
Modes of variability in high-frequency atmospheric excitation for polar motion / Nastula Jolanta (1) and David A. Salstein (2)
(1) Space Research Centre, Polish Acad. Of Sciences, Warsaw, Poland
(2) Atmospheric and Environmental Research, Inc. Cambridge, MA, USANuméro de notice : 14530 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif En ligne : http://www.iers.org/nn_11216/IERS/EN/Publications/TechnicalNotes/tn28.html Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40577 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14530-01 30.40 Livre Centre de documentation Géodésie Disponible Documents numériques
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14530_iers-tn28.pdfAdobe Acrobat PDF Quality assessment of satellite-based global gravity fields models / Johannes Bouman (2000)
Titre : Quality assessment of satellite-based global gravity fields models Type de document : Monographie Auteurs : Johannes Bouman, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2000 Collection : Netherlands Geodetic Commission Publications on Geodesy Sous-collection : New series num. 48 Importance : 114 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-6132-270-2 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] erreur moyenne quadratique
[Termes IGN] erreur systématique
[Termes IGN] estimation statistique
[Termes IGN] qualité des donnéesIndex. décimale : 30.40 Géodésie physique Note de contenu : 1 INTRODUCTION
2 Parameter estimation and the associated mean square error
2.1 Introduction
2.2 Inverse problems and regularisation
- 2.2.1 Illposed problems
- 2.2.2 Global regularisation methods
2.3 Choice of regularisation parameters
- 2.3.1 Minimum MSE
- 2.3.2 Single regularisation parameter
- 2.3.3 Multiple regularisation parameters
3 QUALITY, MEASURES
3.1 Introduction
3.2 Spherical harmonic expansion of the gravitational potential
3.3 Biased and unbiased estimation
3.4 Error propagation
- 3.4.1 Full error matrix
- 3.4.2 Blockdiagonal error matrix
3.5 Ratio measures
3.6 Contribution measures
- 3.6.1 Contribution measure for the unbiased solution
- 3.6.2 Contribution measure for the biased solution
4 GRAVITY FIELD OBSERVATIONS
4.1 Introduction
4.2 Observation model and iterative solution
4.3 Series expansion of the potential in orbital coordinates
4.4 Satellite gravity gradiometry
- 4.4.1 Principle
- 4.4.2 Timewise approach
- 4.4.3 Blockdiagonal normal matrix
4.5 Satellite to satellite tracking
- 4.5.1 Hill equations
- 4.5.2 Observation equations
- 4.5.3 Blockdiagonal normal matrix
4.6 Airborne gravimetry
- 4.6.1 Observation model
- 4.6.2 Structure of the normal matrix
5 GRAVITY FIELD MODELS FROM SGG ONLY
5.1 Introduction
5.2 Synthesis and analysis.
- 5.2.1 Synthesis
- 5.2.2 Analysis
5.3 Observations without noise.
- 5.3.1 Circular polar orbit
- 5.3.2 Circular inclined orbit
- 5.3.3 Noncircular GOCE orbit
5.4 Noisy observations
- 5.4.1 Tikhonov regularisation
- 5.4.2 Biased estimation
6 COMBINED SOLUTIONS
6.1 Introduction
6.2 SGG results for different mission scenarios
6.3 Combination of SW, and SST
6.4 Combination of SW and airborne gravimetry
6.5 Combination of SGG, SST and gravimetry
7 CONCLUSIONS AND RECOMMENDATIONS
A Compact operators and spectral decomposition.
B A few remarks on local regularisation methods
C Synthesis of SGG observations
D Additional resultsNuméro de notice : 11430 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54404 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 11430-01 30.40 Livre Centre de documentation Géodésie Disponible Analytical and numerical methods in gravity field modelling of ideal and real masses / Dimitrios Tsoulis (1999)PermalinkBeschreibung von Deformationsprozessen durch Volterra- und Fuzzy-Modelle sowie neuronale Netze / K. Heine (1999)PermalinkPermalinkThe impact of El Nino and other low-frequency signals on Earth rotation and global Earth systems parameters / David A. Salstein (1999)PermalinkCollected papers of Raimundo O. Vicente on geodynamics, geodesy and astronomy / R.O. Vicente (1998)PermalinkZwei Abhandlungen zu den mathematischen Grundlagen der Geodäsie / E. Martensen (1998)PermalinkAnalyse und Vergleich unterschiedlicher Modelle der dreidimensionalen Geodäsie / U. Klein (1997)PermalinkChamp de pesanteur, géoïde et altimétrie / Henri Duquenne (1997)PermalinkEllipsoidische und topographische Effekte im geodätischen Randwertproblem / Kurt Seitz (1997)PermalinkGravitational Viscoelastodynamics for a Hydrostatic Planet [Viscoélastodynamique gravitationnelle pour une planète hydrostatique] / D. Wolf (1997)Permalink