Détail de l'auteur
Auteur D. Zhong |
Documents disponibles écrits par cet auteur (1)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
![Tris disponibles](./images/orderby_az.gif)
Datumsprobleme und stochastische Aspekte beim GPS-Nivellement für lokale Ingenieurnetze / D. Zhong (1997)
Titre : Datumsprobleme und stochastische Aspekte beim GPS-Nivellement für lokale Ingenieurnetze Titre original : Datum problems and stochastic aspects in GPS leveling for local engineering networks Type de document : Monographie Auteurs : D. Zhong, Auteur Editeur : Munich : Universität der Bundeswehr Année de publication : 1997 Collection : Schriftenreihe des Instituts für Geodäsie, ISSN 0173-1009 num. 58 Importance : 160 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] altitude orthométrique
[Termes IGN] compensation de coordonnées
[Termes IGN] modèle stochastique
[Termes IGN] positionnement par GPS
[Termes IGN] système de coordonnées
[Termes IGN] système de référence géodésique
[Termes IGN] transformation de coordonnéesIndex. décimale : 30.11 Transformation de coordonnées Résumé : (Auteur) With the wide use of the Global Positioning System (GPS) in geodetic positioning and engineering surveying, the research on combination models and methods for local terrestrial and satellite aided network observations has become one of the most fashionable and interesting tasks in the field of geodesy and engineering surveying. Considering especially the accurate determination of levelling heights with the help of GPS (GPS Levelling), the solution of this problem is critical to the exploitation of the full capacity of GPS for engineering surveying purposes.
The satellite aided observation results are coordinates of geometric nature in a geocentric coordinate system, while terrestrial network coordinates result from directions, zenith angles, spatial distances and height differences which are related to the gravity field. These two types of observations are different not only from their reference systems and datum information, but also from their height definitions. In order to combine these different heterogeneous observations to a homogeneous network, it is necessary to solve the following problems :
* hybrid datum problems : The different observation types contain different datum information which has to be unified for a consistent datum definition.
* The heterogeneous observations have different stochastic characteristics. To combine them optimally, a "correct" determination method of the stochastic model is to be found out.
* To combine different heights accurately, the influence of the local gravity field has to be studied and a local geoid model for the transformation between ellipsoidal GPS heights and terrestrial levelling heights has to be developed.
Only by solving these problems, it is possible to combine terrestrial and satellite aided network observations correctly and to achieve an accurate result. Different solution concepts for these problems are intensively discussed and studied by the means of theoretical considerations and practical numerical results. The principle solution concept is a synergetic integration of the adjustment results of different network observations (GPS-network, terrestrial network and information about local geoid). The numerical results of the practical adjustments of two engineering networks of high accuracy with different observation types show that the methods presented are efficient and significant to accuracy improvement of the combined adjustment results.Numéro de notice : 59257 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60542 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 59257-01 30.11 Livre Centre de documentation Géodésie Disponible