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Titre : Nicht-gravitative Störeinflüsse bei der Modellierung von GPS-Erdumlaufbahnen Titre original : [L'influence des forces non gravitationnelles dans la modélisation de la trajectoire de satellites GPS] Type de document : Thèse/HDR Auteurs : J. Feltens, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1991 Collection : DGK - C Sous-collection : Dissertationen num. 371 Importance : 418 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9418-5 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Fortran
[Termes IGN] orbitographie
[Termes IGN] phase GPS
[Termes IGN] satellite GPSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) This dissertation will be concerned with a detailed consideration of the force field influencing a GPS satellite's orbital motion around the Earth. Special attention will be paid to the so-called "non-gravitational" forces acting on GPS spacecraft. Starting with a small introduction in Chapter 1, Chapter 2 follows with some basics that are generally needed for the mathematical description and computation of earth-satellite orbits. In Chapter 3, a detailed consideration of all gravitational disturbing forces, that are relevant for GPS orbits, will be performed. Concerning the orbital disturbances coming from the Moon's gravitational attraction, the formula for the description of third-body attractions of point masses will be extended to account for inhomogenities in the lunar gravitational field. Chapter 4 is the largest one of the dissertation and deals with different non-gravitational forces that may act on an earth-satellite, especially on GPS spacecraft. In the first part of Chapter 4, a general analysis will be done to look, which of these non-conservative forces might be relevant for high altitude satellites, such as GPS satellites. Based on a comparison and the analysis of different existing solar radiation pressure models, currently being used for GPS orbit computations, a new extended solar pressure model will be developed. Considerable improvements, especially in thermal emission modelling will be done. In addition, some further non-gravitational force components, coming from the emission of radiowave beams and of heat, are included too. Also the modelling of Earth- and Moon-shadow passages will be considered in detail, including cooling off - and heating up processes during - and after shadow passes. From its general conception, this new solar radiation pressure model is applicable to others than GPS spacecraft too. Chapter 4 ends with an application of this new, extended solar pressure model to GPS BLOCK I und BLOCK II satellites as well as to Soviet GLONASS spacecraft and a simple cylindrically shaped satellite construction. Chapter 5 shall give an overview over some principles of GPS phase observation evaluations. Such observables can be used for the performance of GPS orbit improvements and may therefore serve for the verification of the GPS force model fidelity. In Chapter 6 some numerical results will be presented. For the performance of the computations, a complete orbit integration program, including the integration of the variational equations as well as the selection between - and the invocation of different solar radiation pressure models, has been established, together with a GPS phase evaluation program. Both codes are written in FORTRAN language. Unfortunately, the GPS phase data provided to the author, needs a pre-processing with pseudorange data for the determination of satellite- and receiver clock behaviour. Since such a pseudorange evaluation program has not been available, a lot of numerical tests had to be dropped. Other numerical tests will be done, looking for some possible resonance effects that might come from solar radiation pressure. Further numerical tests shall give an insight, whether - and if yes - how the inhomogeneous lunar gravitational field may influence the orbital motion of an earth-orbiting satellite. Several constellations between spacecraft, Earth and Moon will be considered in this analysis. Finally Chapter 7 will give some conclusions and in this way finish the Ph.D. Thesis. Numéro de notice : 28099 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63446 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28099-01 30.61 Livre Centre de documentation Géodésie Disponible 28099-02 30.61 Livre Centre de documentation Géodésie Disponible
Titre : Proceedings of the AUG Chapman conference on geodetic VLBI : monitoring global change Type de document : Actes de congrès Auteurs : William E. Carter, Éditeur scientifique Editeur : Rockville (Maryland) : National Oceanic and Atmospheric Administration NOAA Année de publication : 1991 Collection : NOAA Technical Report num. 1 Conférence : AUG 1991, Chapman conference on geodetic VLBI : monitoring global change 22/04/1991 26/04/1991 Washington Washington - Etats-Unis Importance : 440 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] changement climatique
[Termes IGN] interférométrie à très grande base
[Termes IGN] précision millimétrique
[Termes IGN] surveillance météorologique
[Termes IGN] système de référence géodésiqueNuméro de notice : 67656 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=37150 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 67656-01 CG.91 Livre Centre de documentation En réserve M-103 Disponible
Titre : Proceedings of the international seminar GPS in Europe Type de document : Actes de congrès Auteurs : Jozsef Adam, Auteur Editeur : Budapest : Fömi Satellite Geodetic Observatory Année de publication : 1991 Conférence : international seminar GPS in Europe 12/03/1991 14/03/1991 Penc Hongrie Importance : 222 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] géodynamique
[Termes IGN] Global Positioning System
[Termes IGN] positionnement cinématiqueNuméro de notice : 67531 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=37075 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 67531-01 CG.91 Livre Centre de documentation En réserve M-103 Disponible Proceedings of the working meeting on European VLBI for geodesy and astrometry / Survey department of rijkwaterst (1991)
Titre : Proceedings of the working meeting on European VLBI for geodesy and astrometry Type de document : Actes de congrès Auteurs : Survey department of rijkwaterst, Auteur Editeur : Delft : Survey department of Rijkswatestaat Année de publication : 1991 Collection : Report MDTNO-R num. 9243 Conférence : EVGA 1991, 8th working meeting on European VLBI for geodesy and astrometry 13/06/1991 14/06/1991 Dwingeloo Pays-Bas Importance : 140 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] interférométrie à très grande baseNuméro de notice : 67661 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=37152 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 67661-01 CG.91 Livre Centre de documentation En réserve M-103 Disponible Radiointerferometrische Beobachtungen zur Bestimmung der Polbewegung unter Benutzung langer Nord-Süd-Basislinien / Axel Nothnagel (1991)
Titre : Radiointerferometrische Beobachtungen zur Bestimmung der Polbewegung unter Benutzung langer Nord-Süd-Basislinien Titre original : [Observations radiointerférométriques pour déterminer le mouvement polaire en utilisant les longues bases nord-sud] Type de document : Thèse/HDR Auteurs : Axel Nothnagel, Auteur Editeur : Francfort sur le Main : Institut für Angewandte Geodäsie Année de publication : 1991 Collection : DGK - C Sous-collection : Dissertationen num. 368 Importance : 93 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données ITGB
[Termes IGN] interférométrie à très grande baseIndex. décimale : 30.63 Télémétrie laser sur satellite, Télémétrie laser sur lune, VLBI Résumé : (Auteur) For more than 15 years the technique of geodetic very long baseline interferometry (VLBI) 1s used for the determination of geodetic parameters. Pairs of radio telescopes as far apart as more than an Earth radius observe extragalactic radio sources, like quasars, which form an Ideal reference frame for studies of the Earth's rotation. The difference in arrival times of the signals at the stations yields a time delay, which is the principle observable in geodetic VLBI. A certain number of individual observations is necessary to allow the estimation of geodetic parameters like station coordinates and Earth orientation parameters. The geometry distribution of the observations within the segment of the sky mutually visible by pairs of radio telescopes is important for the quality of the least squares adjustment. This thesis describes a method of displaying both the observations and the horizon limitations of two stations forming a baseline in a unified System. This technique serves as a tool for improving the quality of observing schedules and it was used for the scheduling of two sets of measurements employing the Hartebeesthoek Radio Astronomy Observatory (HartRAO) in South Africa. In a series of 6 measurements separated by 5 to 10 days HartRAO observed together with two stations in the US and one station in Europe for Earth orientation determinations. These measurements had duration of 24 hours each. In the second series, daily measurements of only 2-3 hours duration with a single north-south baseline were performed for polar motion monitoring filling the gaps between the network measurements. Both series were observed in two consecutive years, 1986 and 1987, for periods of about 6 weeks each. In the first year the observing schedules were prepared with a conventional approach while in 1987 the technique of displaying the observations relative to a baseline reference point was used. The analysis of the data as described in this thesis showed that the standard deviations of the Earth orientation parameters improved by up to 30% by the use of the modified scheduling strategy. Numéro de notice : 28102 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63449 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28102-01 30.63 Livre Centre de documentation Géodésie Disponible PermalinkSolid Earth science in the 1990s, 1. Volume 1 Program plan / National Aeronautics and Space Administration NASA (1991)
PermalinkSolid Earth science in the 1990s, 2. Volume 2 Panel reports / National Aeronautics and Space Administration NASA (1991)
PermalinkSolid Earth science in the 1990s, 3. Volume 3 Measurement techniques and technology / National Aeronautics and Space Administration NASA (1991)
PermalinkSurvey report for positioning of PULSE-8 2 offshore navigation chains of South China sea and Java sea with reference to the geodetic datums of Indonesia, east and west Malaysia, 2. Volume 2 Appendice A: station descriptions / Racal survey (1991)
PermalinkPermalinkPermalinkVingt ans de recherche en géodésie spatiale, Actes du colloque scientifique du GRGS / Martine Feissel-Vernier (1991)
PermalinkZur Datumsfestlegung und Short-Arc Bahnverbesserung bei der Auswertung von GPS-Beobachtungen / Detlef Angermann (1991)
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