Détail de l'éditeur
|
Documents disponibles chez cet éditeur (22)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
The application of Radon transformation for improved analysis of sparsely sampled data / R.H. Hanssen (1993)
Titre : The application of Radon transformation for improved analysis of sparsely sampled data : a feasibility study Type de document : Monographie Auteurs : R.H. Hanssen, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 1993 Importance : 145 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Statistiques
[Termes IGN] analyse de données
[Termes IGN] échantillonnage de données
[Termes IGN] étude de faisabilité
[Termes IGN] méthode des moindres carrés
[Termes IGN] transformation de RadonNuméro de notice : 11761 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54490 Réservation
Réserver ce documentExemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 11761-01 23.60 Livre Centre de documentation Mathématiques Disponible 11761-02 23.60 Livre Centre de documentation Mathématiques Disponible The lambda method for integer ambiguity estimation / P.J. de Jonge (1993)
Titre : The lambda method for integer ambiguity estimation : implementation aspects Type de document : Monographie Auteurs : P.J. de Jonge, Auteur ; Christian Tiberius, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 1993 Collection : LGR-SERIES num. 12 Importance : 49 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Statistiques
[Termes IGN] ambiguïté entière
[Termes IGN] compensation Lambda
[Termes IGN] décorrélation
[Termes IGN] méthode des moindres carrés
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal GPSRésumé : (Auteur) High precision relative GPS positioning is based on the very precise carrier phase measurements. In order to achieve high precision results within a short observation time span, the integer nature of the ambiguities has to be exploited. In this report the full procedure for parameter estimation based on the model of double difference GPS observations is reviewed, but the emphasis will be on the integer estirnation of the GPS double difference ambiguities. The LAMBDA method will be used for the integer estimation. LAMBDA stands for Least-squares AMBiguity Decorrelation Adjustment. By means of the Z-transformation, the ambiguities are decorrelated prior to the integer estimation. The integer minimization problem is then attacked by a discrete search over an ellipsoidal region, the ambiguity search ellipsoid. The shape and orientation of the ellipsoid are governed by the variance covariance matrix of the ambiguities. The decorrelation realizes an ellipsoid that is very much sphere-like. It can be searched through very efficiently. The size of the ellipsoid can be controlled prior to the search using the volume function. The volume gives an indication of the number of candidates contained in the ellipsoid. A request for only a few candidates can be made, and this enables a straightforward implementation of the search. A limited number of candidates will be output of which one is the integer least-squares estimate for the vector of ambiguities. The LAMBDA method provides, based on the float ambiguities and their variance covariance matrix, the integer least-squares estimate for the ambiguities. Therewith, the fixed solution can be computed. By the decorrelation, the integer estimation can be carried out very fast and efficiently. The total procedure typically takes 30 ms or less on a 486-66 MHz PC for a baseline with 12 ambiguities. The method has been introduced in [1]. Preliminary fast positioning results using the LAMBDA method are given in [8], [9] and [10]. In this report, the implementation aspects of the method are discussed. A detailed description of the method is given, as well as the algorithms in the stylized Matlab notation of [7]. Numéro de notice : 18213 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55353 Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18213-01 23.60 Livre Centre de documentation Mathématiques Disponible Publications 1991 [of the Delft geodetic computing centre] / Delft university of technology (1992)
Titre : Publications 1991 [of the Delft geodetic computing centre] Type de document : Monographie Auteurs : Delft university of technology, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 1992 Collection : LGR-SERIES num. 2 Importance : 166 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale Index. décimale : 30.60 Géodésie spatiale Numéro de notice : 18205 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=41438 Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18205-01 30.60 Livre Centre de documentation Géodésie Disponible Investigations on the use of GPS for geodetic and orbit determination applications / E.T. Hesper (1991)
Titre : Investigations on the use of GPS for geodetic and orbit determination applications Type de document : Monographie Auteurs : E.T. Hesper, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 1991 Importance : 89 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-6275-660-5 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Bernese
[Termes IGN] GIPSY-OASIS
[Termes IGN] Global Positioning System
[Termes IGN] Hermès (navette)
[Termes IGN] mécanique orbitale
[Termes IGN] mesurage de phase
[Termes IGN] modèle atmosphérique
[Termes IGN] orbitographieIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Numéro de notice : 18219 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55355 Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18219-01 30.61 Livre Centre de documentation Géodésie Disponible Quality control and integration aspects of vehicle locations systems / Christian Tiberius (1991)
Titre : Quality control and integration aspects of vehicle locations systems Type de document : Monographie Auteurs : Christian Tiberius, Auteur Editeur : Delft [Pays-Bas] : Delft University of Technology Année de publication : 1991 Collection : LGR-SERIES num. 1 Importance : 92 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] Cinématique
[Termes IGN] compas magnétique
[Termes IGN] contrôle qualité
[Termes IGN] filtre de Kalman
[Termes IGN] modèle mathématique
[Termes IGN] navigation automobile
[Termes IGN] odomètre
[Termes IGN] positionnement dynamique
[Termes IGN] positionnement par GPS
[Termes IGN] simulation
[Termes IGN] temps réelIndex. décimale : 30.70 Navigation et positionnement Résumé : (Auteur) This thesis deals with quality control and integration aspects of vehicle location systems. The feasibility of an integrated navigation system for vehicle location applications has been studied. The data handling of such an integrated navigation system is implemented by means of a Kalman filter. The Kalman filter model consists of a dynamic model, which describes the motions of the vehicle, and a measurement model, which relates all kinds of observables to the system. The final result of this implementation is a procedure for the real time estimation of the state (e.g. position, heading and speed) of the dynamic vehicle. Under the assumptions that the mathematical model is valid the Kalman filter produces optimal estimators of the state. Especially the topic of dynamic models for vehicles has been extensively researched. As a result an appropriate dynamic model has been derived. The theory of quality control in geodetic networks, developed by prof. Baarda, is also applicable to the Kalman filter. Quality encompasses precision and reliability. The real time mathematical model validation in integrated navigation systems is known as the DIA-procedure (detection, identification and adaptation). It is important to validate the mathematical model in real time, because the optimality of the estimators is only guaranteed as long as the assumptions in the mathematical model hold. Simulations have been carried out in order to gain insight in the process of designing an optimal filter, optimal in the sense of precision and reliability. The theory of quality control appears to be feasible to operate in vehicle navigation. The navigation system considered in this thesis consists of an arbitrary radio or satellite positioning system (coordinate observables), an (differential) odometer (observable velocity or distance traveled) and a magnetic compass (observable heading). The results of this system may serve as an indication of how to design well a vehicle location system. Note de contenu : 1. INTRODUCTION
2. MATHEMATICAL MODEL
2.1. Review of mathematical model
2.2. Dynamic model
2.3. Extension of dynamic model
2.4. Measurement model
2.5. Summary
3. QUALITY CONTROL IN VEHICLE NAVIGATION
3.1. Precision
3.2. Reliability and testing
- Model validation - Testing - DIA-procedure- Reliability
3.3. Summary
4. DESIGN AND FILTER COMPUTATIONS
4.1. Objectives
4.2. Simulation
4.3. Reference model COM
- Model parameters - Testing parameters - Design computations - Filter computations - Conclusions
4.4. Alternative models for vehicle navigation
- Integration - Design of the filter - Instrumental parameters - Conclusions
4.5. Summary
5. CONCLUSIONS AND RECOMMENDATIONSNuméro de notice : 18204 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55348 Réservation
Réserver ce documentExemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18204-01 30.70 Livre Centre de documentation Géodésie Disponible Precise orbit computation, gravity model adjustment and altimeter data processing for the ERS-1 altimetry mission / K.F. Wakker (1987)PermalinkGeodetic applications of VLBI [Very Long Baseline Interferometry] / J.J. Brouwer (1981)PermalinkFacilities for satellite geodesy in the Netherlands, prepared for the international symposium on satellite and terrestrial triangulation of the International Association of Geodesy / T.J. Poelstra (01/06/1972)Permalink