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On improving navigation accuracy of GPS/INS systems / Dorota A. Grejner-Brzezinska in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 4 (April 2005)
[article]
Titre : On improving navigation accuracy of GPS/INS systems Type de document : Article/Communication Auteurs : Dorota A. Grejner-Brzezinska, Auteur ; Charles K. Toth, Auteur ; Y. Yi, Auteur Année de publication : 2005 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] capteur à balayage
[Termes IGN] capteur imageur
[Termes IGN] centrale inertielle
[Termes IGN] élément d'orientation externe
[Termes IGN] filtrage du bruit
[Termes IGN] géoréférencement direct
[Termes IGN] GPS-INS
[Termes IGN] modèle d'erreur
[Termes IGN] modèle stochastique
[Termes IGN] orientation du capteur
[Termes IGN] pesanteur terrestre
[Termes IGN] point d'appui
[Termes IGN] positionnement par GPS
[Termes IGN] précision de localisation
[Termes IGN] système de numérisation mobileRésumé : (Auteur) Direct georeferencing, also referred to as direct platform orientation (DPO), is defined as direct measurement of the imaging sensor external orientation parameters (EOP), using positioning and orientation sensors, such as the Global Positioning System (GPS) and Inertial Navigation System (INS) or Inertial Measurement Unit (Imu). Imaging sensors, most frequently supported by the Dpo technique, are digital cameras, lidar systems, multi-spectral or hyper-spectral scanners, or interferometric synthetic aperture radar (INSAR). While for scanning sensors, the use of Dpo is compulsory, frame digital cameras can also directly benefit from this modern technique of sensor orientation. With direct sensor orientation, the requirement for ground control, tie-point matching and aerotriangulation (AT) is significantly reduced, or even entirely eliminated, resulting in shorter times of data acquisition and processing, and streamlined and highly automated data workflow and quality control. Most of the time, the requirement for ground control points is limited to periodic system calibrations and quality control check. Direct georeferencing is considered a fundamental technology of conventional mobile mapping systems (MMS). Despite significant progress in GSP/INS-based direct georeferencing technology in the last decade, there is still room for improvement in terms of better accuracy and better tolerance to GPS outages. This paper is focused on three error modeling and compensation techniques that could potentially improve GPS/INS system's performance on both land-based and airborne platforms : (1) extended gravity compensation, (2) IMU signal de-noising, and (3) stochastic modeling of IMU errors. Numéro de notice : A2005-158 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.14358/PERS.71.4.377 En ligne : https://doi.org/10.14358/PERS.71.4.377 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27296
in Photogrammetric Engineering & Remote Sensing, PERS > vol 71 n° 4 (April 2005)[article]Redefining the paradigm of modern mobile mapping: an automated high-precision road centerline mapping system / Charles K. Toth in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 6 (June 2004)
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Titre : Redefining the paradigm of modern mobile mapping: an automated high-precision road centerline mapping system Type de document : Article/Communication Auteurs : Charles K. Toth, Auteur ; Dorota A. Grejner-Brzezinska, Auteur Année de publication : 2004 Article en page(s) : pp 685 - 694 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] axe médian
[Termes IGN] caméra numérique
[Termes IGN] capteur imageur
[Termes IGN] centrale inertielle
[Termes IGN] GPS-INS
[Termes IGN] lever direct
[Termes IGN] positionnement par GPS
[Termes IGN] précision centimétrique
[Termes IGN] réseau routier
[Termes IGN] système de numérisation mobile
[Termes IGN] temps réelRésumé : (Auteur) A high-precision land-based integrated mapping system has been developed at The Ohio State University to support road centerline mapping operations at the Ohio Department of Transportation District & Office. The system represents a transition from the traditional mobile mapping paradigm towards a highly automated and autonomous design following the trends of modem geoinformatics. The two key components of the custom-designed system are a high-precision integrated GPS-INS navigation system and a fully digital and automated imaging subsystem. The van-based mapping system was designed to deliver the road centerline positions at subdecimeter accuracy in a highly automated manner with limited human interaction in near real time. The paper presents the system's concept and design, followed by an individual performance evaluation of the navigation and imaging components; and finally road test results, representing an operational environment, are also reported. Copyright ASPRS Numéro de notice : A2004-203 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.6.685 En ligne : https://doi.org/10.14358/PERS.70.6.685 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26730
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 6 (June 2004) . - pp 685 - 694[article]GPS + INS + pseudolites: an integrated positioning system / Y. Yi in GPS world, vol 14 n° 7 (July 2003)
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Titre : GPS + INS + pseudolites: an integrated positioning system Type de document : Article/Communication Auteurs : Y. Yi, Auteur ; Dorota A. Grejner-Brzezinska, Auteur ; Charles K. Toth, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 42 - 49 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] GPS assisté pour la navigation (technologies)
[Termes IGN] GPS-INS
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] pseudolite
[Termes IGN] signal GPS
[Termes IGN] véhicule automobileRésumé : (Auteur) Kinematic positioning has become a standard GPS technique for precision navigation that supports surveying and mapping systems. One application for which the high accuracy and reliability of kinematic positioning are required is mobile mapping, whose market has significantly expanded in the past 10 years. Inertial navigation systems (INS) normally augment GPS to provide continuous and accurate trajectory and attitude information from the imaging sensors of mobile mapping systems. GPS contributes high accuracy and long-term stability (with properly resolved integer ambiguities and no losses of lock) and provides a means of error estimation for the INS sensor. A GPS-calibrated INS provides reliable bridging during GPS outages and supports ambiguity resolution after the CPS signal lock is re-established. Thus, high navigation accuracy normally can be achieved even if GPS signals are subject to occasional block-ages. But what if GPS signals are lost for extended periods of time or the visible constellation is limited to four or fewer satellites, which can often happen in urban canyons? Pseudo-satellites (pseudolites) may be the answer. This month's column discusses an experimental GPS/INS/pseudolite system, with special emphasis on the error spectrum and the navigation performance analysis based on a medium-accuracy and highly reliable INS, limited GPS constellation availability, and a varying number of pseudolites. It also describes simulated and actual pseudolite data in typical noisy environments and analyses their impact on navigation accuracy. Copyright Advanstar Communications Numéro de notice : A2003-441 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26520
in GPS world > vol 14 n° 7 (July 2003) . - pp 42 - 49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-03071 RAB Revue Centre de documentation En réserve L003 Disponible Sensor integration for improved surface modelling: DEM extraction from high-resolution digital imagery and laser altimetry / Charles K. Toth in GIM international, vol 13 n° 6 (June 1999)
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Titre : Sensor integration for improved surface modelling: DEM extraction from high-resolution digital imagery and laser altimetry Type de document : Article/Communication Auteurs : Charles K. Toth, Auteur ; Dorota A. Grejner-Brzezinska, Auteur Année de publication : 1999 Article en page(s) : pp 42 - 45 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] données laser
[Termes IGN] modèle numérique de surface
[Termes IGN] télémétrie laser aéroportéNuméro de notice : A1999-125 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26325
in GIM international > vol 13 n° 6 (June 1999) . - pp 42 - 45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-99061 RAB Revue Centre de documentation Revues en salle Disponible
Titre : Experiences with frame CCD arrays and direct georeferencing Type de document : Article/Communication Auteurs : Charles K. Toth, Auteur Editeur : Karlsruhe, Heidelberg, ... : Wichmann Année de publication : 1999 Conférence : PhoWo 1999, 47th Photogrammetric Week 20/09/1999 24/09/1999 Stuttgart Allemagne OA proceedings Importance : pp 95 - 107 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] chambre DTC
[Termes IGN] chambre métrique
[Termes IGN] étalonnage de chambre métrique
[Termes IGN] GPS-INS
[Termes IGN] orientation du capteur
[Termes IGN] système de numérisation mobileRésumé : (Auteur) The rapid technological developments of the 90's have completely redefined the mapping practice as a whole. In less than a decade, digital techniques have come to outnumber the traditionally analog data acquisition and processing methods. Supported by unprecedented demand for large-volume, accurate spatial data, these new digital techniques emerged as dominant mapping technologies by the end of the decade. Technological change has also recently reached the analog camera-based aerial surveying practice, which supplies about two-thirds of spatial data for mapping and was the last stronghold of analog techniques. Two key components of this emerging technology are the electronic sensor-based digital camera and GPS/INS-based direct platform orientation. In fact, these new platform orientation systems are rapidly becoming a core component of modern airborne mapping and remote sensing systems.
This paper investigates the calibration and performance validation aspects of a GPS/INS/CM prototype system, including the digital camera calibration and the boresighting misalignment calibration of the positioning component. The calibration performance of the system is evaluated based on data collected during several test flights.Numéro de notice : C1999-065 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans En ligne : https://phowo.ifp.uni-stuttgart.de/publications/phowo99/toth.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65829 A PC based version of the Planicomp analytical plotter / A. Schenk (02/04/1989)Permalink