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Termes IGN > 1- Outils - instruments et méthodes > instrument > instrument de mesure
instrument de mesureSynonyme(s)instrument de mesurage ;appareil de mesure appareil de mesurageVoir aussi |
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Analysis of full-waveform LiDAR data for classification of an orange orchard scene / Karolina D. Fieber in ISPRS Journal of photogrammetry and remote sensing, vol 82 (August 2013)
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Titre : Analysis of full-waveform LiDAR data for classification of an orange orchard scene Type de document : Article/Communication Auteurs : Karolina D. Fieber, Auteur ; Ian J. Davenport, Auteur ; James M. Ferryman, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 63 - 82 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] Citrus sinensis
[Termes IGN] classification
[Termes IGN] données lidar
[Termes IGN] lidar à retour d'onde complète
[Termes IGN] vergerRésumé : (Auteur) Full-waveform laser scanning data acquired with a Riegl LMS-Q560 instrument were used to classify an orange orchard into orange trees, grass and ground using waveform parameters alone. Gaussian decomposition was performed on this data capture from the National Airborne Field Experiment in November 2006 using a custom peak-detection procedure and a trust-region-reflective algorithm for fitting Gauss functions. Calibration was carried out using waveforms returned from a road surface, and the backscattering coefficient Y was derived for every waveform peak. The processed data were then analysed according to the number of returns detected within each waveform and classified into three classes based on pulse width and Y. For single-peak waveforms the scatterplot of Y versus pulse width was used to distinguish between ground, grass and orange trees. In the case of multiple returns, the relationship between first (or first plus middle) and last return Y values was used to separate ground from other targets. Refinement of this classification, and further sub-classification into grass and orange trees was performed using the Y versus pulse width scatterplots of last returns. In all cases the separation was carried out using a decision tree with empirical relationships between the waveform parameters. Ground points were successfully separated from orange tree points. The most difficult class to separate and verify was grass, but those points in general corresponded well with the grass areas identified in the aerial photography. The overall accuracy reached 91%, using photography and relative elevation as ground truth. The overall accuracy for two classes, orange tree and combined class of grass and ground, yielded 95%. Finally, the backscattering coefficient Y of single-peak waveforms was also used to derive reflectance values of the three classes. The reflectance of the orange tree class (0.31) and ground class (0.60) are consistent with published values at the wavelength of the Riegl scanner (1550 nm). The grass class reflectance (0.46) falls in between the other two classes as might be expected, as this class has a mixture of the contributions of both vegetation and ground reflectance properties. Numéro de notice : A2013-412 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.05.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.05.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32550
in ISPRS Journal of photogrammetry and remote sensing > vol 82 (August 2013) . - pp 63 - 82[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2013081 RAB Revue Centre de documentation En réserve L003 Disponible Calibration of the clock-phase biases of GNSS networks: the closure-ambiguity approach / A. Lannes in Journal of geodesy, vol 87 n° 8 (August 2013)
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Titre : Calibration of the clock-phase biases of GNSS networks: the closure-ambiguity approach Type de document : Article/Communication Auteurs : A. Lannes, Auteur ; J.L. Prieur, Auteur Année de publication : 2013 Article en page(s) : pp 709 - 831 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] erreur systématique
[Termes IGN] étalonnage d'instrument
[Termes IGN] horloge
[Termes IGN] phase GNSS
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement ponctuel précis
[Termes IGN] réseau géodésique permanentRésumé : (Auteur) In global navigation satellite systems (GNSS), the problem of retrieving clock-phase biases from network data has a basic rank defect. We analyse the different ways of removing this rank defect, and define a particular strategy for obtaining these phase biases in a standard form. The minimum-constrained problem to be solved in the least-squares (LS) sense depends on some integer vector which can be fixed in an arbitrary manner. We propose to solve the problem via an undifferenced approach based on the notion of closure ambiguity. We present a theoretical justification of this closure-ambiguity approach (CAA), and the main elements for a practical implementation. The links with other methods are also established. We analyse all those methods in a unified interpretative framework, and derive functional relations between the corresponding solutions and our CAA solution. This could be interesting for many GNSS applications like real-time kinematic PPP for instance. To compare the methods providing LS estimates of clock-phase biases, we define a particular solution playing the role of reference solution. For this solution, when a phase bias is estimated for the first time, its fractional part is confined to the one-cycle width interval centred on zero; the integer-ambiguity set is modified accordingly. Our theoretical study is illustrated with some simple and generic examples; it could have applications in data processing of most GNSS networks, and particularly global networks using GPS, Glonass, Galileo, or BeiDou/Compass satellites. Numéro de notice : A2013-480 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-013-0641-4 Date de publication en ligne : 18/06/2013 En ligne : https://doi.org/10.1007/s00190-013-0641-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32618
in Journal of geodesy > vol 87 n° 8 (August 2013) . - pp 709 - 831[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-2013081 SL Revue Centre de documentation Revues en salle Disponible Comparison of IASI water vapour products over complex terrain with COPS campaign data / Guido Masiello in Meteorologische Zeitschrift, vol 22 n° 4 (August 2013)
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Titre : Comparison of IASI water vapour products over complex terrain with COPS campaign data Type de document : Article/Communication Auteurs : Guido Masiello, Auteur ; Carmine Serio, Auteur ; Thomas Deleporte, Auteur ; Hervé Herbin, Auteur ; Paolo Di Girolamo, Auteur ; Cédric Champollion, Auteur ; Andreas Behrendt, Auteur ; Pierre Bosser , Auteur ; Olivier Bock
, Auteur ; V. Wulfmeyer, Auteur ; Matthieu Pommier, Auteur ; Cyrille Flamant, Auteur
Année de publication : 2013 Article en page(s) : pp 471 - 487 Note générale : bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] image MetOp-IASI
[Termes IGN] lidar Raman
[Termes IGN] positionnement par GPS
[Termes IGN] Rhin (bassin)
[Termes IGN] teneur en vapeur d'eau
[Termes IGN] troposphèreRésumé : (auteur) In this work, we compare IASI-retrieved vertical water vapour profiles and related precipitable water over a complex region, namely the Rhine Valley area, during the pre-operational period of IASI exploitation (June–August 2007). Both IASI water vapour mixing ratio profiles and integrated water vapour content are retrieved from L1C radiances spectra using two techniques and compared with water vapour related observations acquired during the Convective and Orographically-induced Precipitation Study (COPS) field campaign that took place in this area at that time (i.e. lidars, radiosoundings and a global positioning system - GPS - station network). This work addresses the issue of IASI vertical spatial resolution and its capability to detect two-layer water vapour structures such as those observed in a mountainous area and which play an important role in convective initiation or inhibition. We found that this capability mostly relies on the type of a-priori background vector (climatology or space-time colocated ECMWF analysis), which is used within the retrieval scheme. Systematic comparison of water vapour products derived from 71 IASI spectra confirms that IASI can retrieve water vapour amounts in 2 km width layers, in the lower troposphere, with an accuracy of approximately 10%. Numéro de notice : A2013-817 Affiliation des auteurs : LASTIG LOEMI+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article DOI : 10.1127/0941-2948/2013/0430 Date de publication en ligne : 01/08/2013 En ligne : http://dx.doi.org/10.1127/0941-2948/2013/0430 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80103
in Meteorologische Zeitschrift > vol 22 n° 4 (August 2013) . - pp 471 - 487[article]Amélioration de la position GNSS en ville par la méthode des tranchées urbaines / M. Voyer in Géomatique expert, n° 93 (01/07/2013)
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Titre : Amélioration de la position GNSS en ville par la méthode des tranchées urbaines Type de document : Article/Communication Auteurs : M. Voyer, Auteur ; D. Betaille, Auteur ; François Peyret, Auteur Année de publication : 2013 Article en page(s) : pp 36 - 49 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] canyon urbain
[Termes IGN] détection du signal
[Termes IGN] GPS assisté pour la navigation (technologies)
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] modèle numérique du bâti
[Termes IGN] odomètre
[Termes IGN] positionnement par GNSSRésumé : (Auteur) [introduction] [...] Cet article s'intéresse aux problèmes de localisation GNSS en milieu urbain où la connaissance a priori du bâti est disponible sous la forme d'une base de données numériques. Numéro de notice : A2013-459 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32597
in Géomatique expert > n° 93 (01/07/2013) . - pp 36 - 49[article]Exemplaires(3)
Code-barres Cote Support Localisation Section Disponibilité 265-2013041 RAB Revue Centre de documentation En réserve L003 Disponible IFN-001-P001477 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt IFN-001-P001477-1 PER Revue Nogent-sur-Vernisson Salle périodiques Disponible Assessing lidar accuracy with hexagonal retro-reflective targets / Roberto Canavosio-Zuzelski in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 7 (July 2013)
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Titre : Assessing lidar accuracy with hexagonal retro-reflective targets Type de document : Article/Communication Auteurs : Roberto Canavosio-Zuzelski, Auteur ; James Hogarty, Auteur ; Craig Rodarmel, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 663 - 670 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] cible réfléchissante
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] instabilité du vecteur (télédétection)
[Termes IGN] Lidar
[Termes IGN] ligne de visée
[Termes IGN] points homologues
[Termes IGN] précision du positionnementRésumé : (Auteur) Airborne lidar systems have the potential to produce extremely accurate terrain information at high spatial densities. However, to meet stringent accuracy requirements and minimize systematic errors, proper calibration of the lidar system is required. "Boresighting" is a technique used to correct for some of these systematic errors and improve the spatial alignment of lidar passes. One challenge with boresighting is the mensuration accuracy to which a known point can be located in overlapping low density lidar strips. To address this issue, a raised Hexagonal Retro-Reflective Lidar ground Target (hrrt) is introduced. The target was optimized for precise mensuration at low point densities. The mensuration model is based on a least squares hexagon fitting approach and is proven to produce mensuration accuracies of 5 cm horizontal and 4 cm vertical (1-sigma) at ~2 pts/m2. To demonstrate a practical application, the hrrt's are used as tie points in a rigorous boresight adjustment to compute lidar strip misalignment parameters (roll, pitch, heading, and range bias). The adjustment results show that accurate boresight parameters are recovered along with their associated uncertainties. Numéro de notice : A2013-395 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.79.7.663 En ligne : https://doi.org/10.14358/PERS.79.7.663 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32533
in Photogrammetric Engineering & Remote Sensing, PERS > vol 79 n° 7 (July 2013) . - pp 663 - 670[article]Implantation d'un projet de desserte forestière en forêt de montagne : les apports du lidar aérien / Alain Munoz in Rendez-vous techniques, n° 39-40 (Hiver-printemps 2013)
PermalinkGeometric calibration of a terrestrial laser scanner with local additional parameters: An automatic strategy / D. Garcia-San-Miguel in ISPRS Journal of photogrammetry and remote sensing, vol 79 (May 2013)
PermalinkStochastic modeling of high-stability ground clocks in GPS analysis / Kang Wang in Journal of geodesy, vol 87 n° 5 (May 2013)
PermalinkThe influence of scanner parameters on the extraction of tree metrics from FARO Photon 120 terrestrial laser scans / Pyare Pueschel in ISPRS Journal of photogrammetry and remote sensing, vol 78 (April 2013)
PermalinkLe positionnement par satellites et les maths / Jonathan Chenal in Tangente, n° 151 (mars-avril 2013)
PermalinkMeet Dr Johannes Riegl / P. Ftizgibbon in GEO: Geoconnexion international, vol 12 n° 2 (february 2013)
PermalinkAnalyse fonctionnelle du futur système de repositionnement pour les fermetures de l'expérience ATLAS / Mehdi Daakir (2013)
PermalinkAnalysis of the repeated absolute gravity measurements in the Czech Republic, Slovakia and Hungary from the period 1991–2010 considering instrumental and hydrological effects / S. Zhang in Journal of geodesy, vol 87 n° 1 (January 2013)
PermalinkPermalinkPermalinkPermalinkPermalinkPerformance of real-time precise point positioning / Junping Chen in Marine geodesy, vol 36 n° 1 (January - March 2013)
PermalinkPermalinkA 3-d laser scanning system and scan data processing method for the monitoring of tunnel deformations / K. Chmelina in Journal of applied geodesy, vol 6 n° 3-4 (November 2012)
PermalinkAirborne lidar for natural environments: research and applications in France / C. Puech in Revue Française de Photogrammétrie et de Télédétection, n° 200 (Novembre 2012)
PermalinkEstimating the uncertainty of terrestrial laser scanner measurements / M. Polo in IEEE Transactions on geoscience and remote sensing, vol 50 n° 11 Tome 2 (November 2012)
PermalinkRange camera self-calibration with scattering compensation / Derek D. Lichti in ISPRS Journal of photogrammetry and remote sensing, vol 74 (Novembrer 2012)
PermalinkThe electronically steerable flash Lidar : A full waveform scanning system for topographic and ecosystem structure applications / H. Duong in IEEE Transactions on geoscience and remote sensing, vol 50 n° 11 Tome 2 (November 2012)
PermalinkMulti-model validation of currents in the Chesapeake Bay region in June 2010 / P. Chu in Marine geodesy, vol 35 n° 4 (October - December 2012)
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