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Ein integritätswahrendes Messsystem für kinematische Anwendungen / W. Stempfhuber (2004)
Titre : Ein integritätswahrendes Messsystem für kinematische Anwendungen Titre original : [Un système de mesure intégré pour des applications cinématiques] Type de document : Thèse/HDR Auteurs : W. Stempfhuber, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2004 Collection : DGK - C Sous-collection : Dissertationen num. 576 Importance : 128 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-5015-0 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] agriculture de précision
[Termes IGN] étalonnage d'instrument
[Termes IGN] GPS en mode cinématique
[Termes IGN] GPS en mode différentiel
[Termes IGN] guidage de véhicules
[Termes IGN] lever tachéométrique
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] tachéomètre électroniqueIndex. décimale : 30.70 Navigation et positionnement Résumé : (Auteur) By combining individual components with intelligent analytical algorithms, modern measuring systems such as robot tacheometer or the " Global Positioning System, (GPS) " allow many new areas of application in modern engineering surveying. Use of this equipment is initially limited to static, quasi-static or stop-and-go techniques. Today, these efficient measuring sensors are used increasingly for kinematic measuring tasks.
Different applications for the precise description of the movement track and for optimizing the horizontal and vertical availability require a combination of these measuring sensors, which operate separately. Normally both these measuring instruments cannot be combined without changing hardware or software (firmware). This thesis presents a method that allows a synchronization of independent measuring systems without a common basis through a comprehensive observation of all factors of disturbance and influence. Calibration of terrestrial and global measuring sensors for kinematic applications is also discussed in detail.
With respect to the description of dynamic movement processes, a calibration of this kind of kinematic measuring sensors requires an expansion of conventional geodetic strategies. Based on static characteristics, these sensors must be tested using kinematic testing methods relating to the type, size and behavior of target points affected by measuring uncertainty. In addition, the real time capability of the measuring system and the synchronization of individual subsystems must be verified and, if required, minimized by corresponding calibration functions.
The result is a hybrid measuring system for kinematic applications that, independent of the type of movement, allows a precise derivation of the movement path based on discrete measuring points on a millimeter scale. For example, these hybrid measuring systems can be employed for the following: 1- as a high precision positioning system for navigation and control of process flows in road and railways track construction (machine guidance), 2- for special applications involving maximum availability and accuracy requirements for land and water vehicles or aircraft, 3- as a reference system to verify the feasible accuracy of positioning and application techniques, and 4- to analyze technical reaction times of partial and overall systems in the precision farming sector.
The descriptions of selected applications in this thesis are limited to testing of section specific land use with the " Landwirtschaftlichen BUS System LBS, (DIN 9684 and ISO 11783) " with respect to position accuracy, precision, quality, and size of disturbances occurring. Investigations have been partly funded by a joint research project within the " Forschungsverbund Agrarökosysteme München, (FAM) " research alliance, which took place at the Chair for Geodesy in cooperation with the Department for Bio Resources and Land Use Technology, Crop Production Engineering (both at the Technical University of Munich).Numéro de notice : 13276 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54955 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13276-01 30.70 Livre Centre de documentation Géodésie Disponible Near real-time geocoding of SAR imagery with orbit error removal / A.J.E. Smith in International Journal of Remote Sensing IJRS, vol 24 n° 24 (December 2003)
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Titre : Near real-time geocoding of SAR imagery with orbit error removal Type de document : Article/Communication Auteurs : A.J.E. Smith, Auteur Année de publication : 2003 Article en page(s) : pp 5219 - 5228 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] correction géométrique
[Termes IGN] erreur aléatoire
[Termes IGN] géoréférencement
[Termes IGN] image radar moirée
[Termes IGN] orbitographie
[Termes IGN] station de terrain mobile
[Termes IGN] temps réel
[Termes IGN] trajectographie (positionnement)Résumé : (Auteur) When utilizing knowledge of the spacecraft trajectory for near realtime geocoding of Synthetic Aperture Radar (SAR) images, the main problem is that predicted satellite orbits have to be used, which may be in error by several kilometres. As part of the development of a Dutch autonomous mobile ground station to receive and process satellite SAR data, a method has been developed that removes the effects of orbit errors from the computed azimuth and slantrange coordinates, whilst maintaining the realtime character. Results show that predicted orbits can be used to geocode SAR imagery in near real time with the same accuracy as when using precise orbits, i.e. 30-40 m. Numéro de notice : A2003-342 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000114815 En ligne : https://doi.org/10.1080/0143116031000114815 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22637
in International Journal of Remote Sensing IJRS > vol 24 n° 24 (December 2003) . - pp 5219 - 5228[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-03241 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Applying differential InSAR to orbital dynamics: a new approach for estimating ERS trajectories / A.O. Kohlhase in Journal of geodesy, vol 77 n° 9 (December 2003)
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Titre : Applying differential InSAR to orbital dynamics: a new approach for estimating ERS trajectories Type de document : Article/Communication Auteurs : A.O. Kohlhase, Auteur ; F.K. Massonnet, Auteur Année de publication : 2003 Article en page(s) : pp 493 - 502 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Techniques orbitales
[Termes IGN] ERS
[Termes IGN] géophysique interne
[Termes IGN] interferométrie différentielle
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] résidu conjugué
[Termes IGN] séisme
[Termes IGN] trajectographie (positionnement)Résumé : (Auteur) A new approach for tuning the trajectories of the European remote sensing (ERS) satellites is developed and assessed. Differential dualpass interferometry is applied to calculate interferograms from the phase difference of synthetic aperture radar (SAR) images acquired by the ERS satellites over the site of the 1992 earthquake in Landers, California. These interferograms contain information about orbital trajectories and geophysical deformation. Beginning with good prior estimates of the orbital trajectories, a radial and an across-track orbital adjustment is estimated at each epoch. The data are the fringe counts along distance and azimuth. Errors in the acrosstrack and radial components of the orbit estimates produce fringes in the interferograms. The spacing between roughly parallel fringes gives the gradients in distance and azimuth coordinates. The approach eliminates these fringes from interferometric pairs spanning relatively short time intervals containing few topographic residuals or atmospheric artefacts. An optimum interferometric path with six SAR acquisitions is selected to study post and inter-seismic deformation fields. In order to regularize the problem, it is assumed that the radial and across-track adjustments both sum to zero. Applying the adjustment approach to the prior estimates of trajectory from the Delft Institute for Earth-Orientated Space Research (DEOS), root mean squares of 7.3 cm for the across-track correction components and 2.4 cm for the radial ones are found. Assuming 0.1 fringes for the a priori standard deviation of the measurement, the approach yields mean standard deviations of 2.4 cm for the across-track and 4.5 cm for the radial components. The approach allows an 'interval by interval' improvement of a set of orbital estimates from which post-fit interferograms of different time intervals spanning a total 3.8 year inter-seismic time interval can be created. The interferograms calculated with the post-fit orbital estimates compare favorably with those corrected with a conventional orbital tuning approach. Using the adjust-ment approach, it is possible to distinguish between orbital and deformation contributions to interferometric SAR (InSAR) phase gradients. Surface deformation changes over an inter-seismic time interval longer than one year can be measured. This approach is, however, limited to wellcorrelated interferograms where it is possible to measure the fringe gradient. Numéro de notice : A2003-366 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-003-0336-3 En ligne : https://doi.org/10.1007/s00190-003-0336-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26446
in Journal of geodesy > vol 77 n° 9 (December 2003) . - pp 493 - 502[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-03101 RAB Revue Centre de documentation En réserve L003 Disponible 266-03102 RAB Revue Centre de documentation En réserve L003 Disponible L'offre cartographique et GPS à destination du grand public / Anonyme in Géomatique expert, n° 29 (01/11/2003)
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Titre : L'offre cartographique et GPS à destination du grand public Type de document : Article/Communication Auteurs : Anonyme, Auteur Année de publication : 2003 Article en page(s) : pp 28 - 33 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] altimètre
[Termes IGN] géonavigateur
[Termes IGN] grand public
[Termes IGN] guidage de véhicules
[Termes IGN] information cartographique
[Termes IGN] PDA
[Termes IGN] positionnement par GPS
[Termes IGN] précision métriqueRésumé : (documentaliste) le marché grand public s'intéresse de plus en plus aux applications de la cartographie. Plusieurs récepteurs GPS terrestres principalement sont proposés ; leur précision, tant planimétrique qu'altimétrique, est faible et correspond à l'usage personnel qui en est fait. Le secteur des systèmes de guidage par PDA, en terme d'applications conduite automobile est en pleine expansion. Numéro de notice : A2003-405 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26485
in Géomatique expert > n° 29 (01/11/2003) . - pp 28 - 33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-03081 RAB Revue Centre de documentation En réserve L003 Disponible A comparison of two methods to create tracks of moving objects: linear weighted distance and constrained random walk [distance linéaire pondérée et trajet aléatoire contraint] / E.A. Wentz in International journal of geographical information science IJGIS, vol 17 n° 7 (october 2003)
[article]
Titre : A comparison of two methods to create tracks of moving objects: linear weighted distance and constrained random walk [distance linéaire pondérée et trajet aléatoire contraint] Type de document : Article/Communication Auteurs : E.A. Wentz, Auteur ; A.F. Campbell, Auteur ; R. Houston, Auteur Année de publication : 2003 Article en page(s) : pp 623 - 645 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] distance pondérée
[Termes IGN] incertitude des données
[Termes IGN] objet mobile
[Termes IGN] positionnement cinématique
[Termes IGN] Simiiformes
[Termes IGN] trajectographie (positionnement)
[Termes IGN] trajet (mobilité)
[Termes IGN] variable aléatoireRésumé : (Auteur) As an object moves through space, it creates a track (or path) representing the object's past and present position and associated attributes. If data capture falls, then positions along the tracks are unknown. The particular problem we address in this paper is to create tracks of moving objects with missing data. We implement and test two techniques that create continuous tracks of two primate species (Ateles geoffroyi, the red spider monkey, and Cebus capucinus, the whitefaced capuchin). Continuous tracks were needed to calculate home range and to analyze daily ranging patterns for each species. Establishing continuous tracks of primates through field data alone, however, was impossible due to challenging field conditions. The results of the analysis using tracks with interpolated positions helped establish that Ateles tend to move directly to their destination while Cebus tended to follow a more wandering track. Numéro de notice : A2003-257 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/1365881031000135492 En ligne : https://doi.org/10.1080/1365881031000135492 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22552
in International journal of geographical information science IJGIS > vol 17 n° 7 (october 2003) . - pp 623 - 645[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-03071 RAB Revue Centre de documentation En réserve L003 Disponible 079-03072 RAB Revue Centre de documentation En réserve L003 Disponible Navigation : principles of positioning and guidance / Bernhard Hofmann-Wellenhof (2003)PermalinkTopographic SAR interferometry formulation for high-précision DEM generation / R. Abdelfattah in IEEE Transactions on geoscience and remote sensing, vol 40 n° 11 (November 2002)PermalinkGPS at Ground zero: tracking world trade center recovery / R.J. Menard in GPS world, vol 13 n° 9 (September 2002)PermalinkEnv-KPI, environnemental key performance indicators / S. Chesneau (2002)PermalinkCouplage d'un logiciel de trajectographie et du SIG ARC-INFO / I. Koua (2001)PermalinkEvaluation d'un système de positionnement d'un véhicule sur route basé sur la fusion de données / E. Helou Helo (2001)PermalinkModélisation et estimation du frottement atmosphérique sur les satellites Spot2 et Spot3 dans le cadre du système DORIS / R. Garmier (2001)PermalinkSpace gravity spectroscopy - The sensitivity analysis of GPS-tracked satellite missions (case study CHAMP) / C. Schäfer (2001)PermalinkLa visualisation des données Greenstar / L. Dufy (2001)PermalinkLe point sur l'évolution des techniques de guidage utilisées aujourd'hui / C. Maraget in XYZ, n° 84 (septembre - novembre 2000)Permalink