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Titre : Analysis of European forest condition data base : Euro-Landscape project Type de document : Monographie Auteurs : Nick Jewell, Auteur ; Pam Kennedy, Auteur ; Space applications institute, Auteur ; Joint research centre = Centre commun de recherche (Ispra, Italie), Auteur ; European commission, Auteur Editeur : Bruxelles : Commission Européenne = European Commission Année de publication : 2001 Collection : EUR num. 19803 Importance : 46 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] analyse spatiale
[Termes IGN] base de données localisées
[Termes IGN] eau pluviale
[Termes IGN] effet de serre
[Termes IGN] forêt
[Termes IGN] inondation
[Termes IGN] ozone
[Termes IGN] pollution atmosphérique
[Termes IGN] température au sol
[Termes IGN] Union EuropéenneNuméro de notice : 11973 Affiliation des auteurs : non IGN Thématique : FORET Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54516 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 11973-01 48.00 Livre Centre de documentation Végétation - Forêt Disponible IFN-001-001387 JEW Livre Nogent-sur-Vernisson Bibliothèque Nogent IFN Exclu du prêt Analysis of refraction influences in geodesy using image processing and turbulence models / Philipp Flach (2001)
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Titre : Analysis of refraction influences in geodesy using image processing and turbulence models Type de document : Thèse/HDR Auteurs : Philipp Flach, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2001 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 63 Importance : 175 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-05-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie
[Termes IGN] analyse spectrale
[Termes IGN] détecteur à transfert de charge
[Termes IGN] filtre de Wiener
[Termes IGN] instrument de géodésie
[Termes IGN] instrumentation Leica
[Termes IGN] méthode des moindres carrés
[Termes IGN] modèle atmosphérique
[Termes IGN] réfraction atmosphérique
[Termes IGN] spectre électromagnétique
[Termes IGN] traitement d'image
[Termes IGN] turbulence
[Termes IGN] variance
[Termes IGN] vidéothéodoliteIndex. décimale : 30.03 Instruments de géodésie Résumé : (Auteur) The propagation path of light in the atmosphere is influenced by inhomogeneities of the refractive index. These refraction effects deteriorate the accuracy of the direction and distance measurements in geodetic applications. As illustrated by two examples in this report, the refraction effects cannot be accurately corrected up to now and, therefore, solutions must be provided which can be implemented into geodetic instruments. The presented approach is based on the determination of the temperature gradient being the decisive influential parameter for angular refraction effects.
In the atmosphere, temperature gradients are related to turbulent thermal exchange processes such as the turbulent sensible heat flux. In order to describe atmospheric turbulence, the applied statistical approach uses the method of spectral analysis which states that the atmospheric turbulent velocity field can be thought to consist of many eddies of different densities. This energy spectrum of turbulence can be modelled using the structure constant of refractive index CJ and the inner scale 10 of turbulence. If these two structure parameters are measured, the temperature gradient is derived from dimensionless profile functions using the so-called Monin-Obukhov similarity description. Hereby, the fact should be kept in mind, that the Monin-Obukhov similarity description and the energy spectrum of turbulence are only valid for vertical temperature gradient profiles in the atmospheric boundary layer.
This research work investigates the determination of the required structure parameter Cn and lo by means of image sensors which can be built into geodetic instruments. To derive the structure parameters CJ and 10 from the acquired image data, the application of appropriate image processing techniques is examined. The evaluation concept is based on angle-of-arrival fluctuations and intensity fluctuations. Angle-of-arrival fluctuations are perceived as high-frequency motions of image patterns grabbed by the sensor, and intensity fluctuations are related to the temporal variation of the gray values of the pixels. As presented in this report, these two effects of optical turbulence can be used to determine the structure parameter Cn and lo. For this purpose, image processing techniques must parameterize both angle-of-arrival fluctuations and intensity fluctuations. Within this research work, the angle-of-arrival fluctuations are modelled by the variance óx characterizing the shifting of image patterns which are located using edge detection algorithms. The intensity fluctuations are modelled by the variance óx characterizing the temporal intensity spectrum of the incoming light beam. In the scope of this research work, the variance óx is provided using digital filter techniques such as the Wiener filter or least-squares template matching.
In order to validate this concept, the video theodolite Leica TM3000V and a digital line scan camera Basler L120 are used as two different imaging systems to acquire image data during various practical field experiments. These field experiments revealed a partial good agreement between the structure parameter CJ and lo obtained by the image sensors and the ones obtained by a reference system (scintillometer). Basically, the method presented here is appropriate to reduce the refraction influence. A decisive advantage of this method is based on the fact that additional sensors are not necessary (except for the image sensors which are built into the instrument). However, as the exemplary comparison of temperature gradients shows at the end of the report, further research work in the scope of the atmospheric boundary layer is still necessary.Numéro de notice : 13062 Affiliation des auteurs : non IGN Autre URL associée : http://dx.doi.org/10.3929/ethz-a-004045114 Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-004045114 En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-63.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54863 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13062-01 30.03 Livre Centre de documentation En réserve M-103 Disponible 13062-02 30.03 Livre Centre de documentation En réserve M-103 Disponible
Titre : Chemistry of the upper and lower atmosphere : theory, experiments and applications Type de document : Monographie Auteurs : B.J. Finlayson-Pitts, Auteur ; J.N. Pitts, Auteur Editeur : Londres, New York : Academic Press Année de publication : 2001 Importance : 970 p. Format : 23 x 28 cm ISBN/ISSN/EAN : 978-0-12-257060-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Atmosphère
[Termes IGN] aérosol
[Termes IGN] azote
[Termes IGN] changement climatique
[Termes IGN] gaz
[Termes IGN] pollution atmosphérique
[Termes IGN] stratosphère
[Termes IGN] troposphèreRésumé : (Editeur) This state-of-the-art book is a comprehensive treatment of atmospheric chemistry, including the application of measurements, mechanisms, and models to systems ranging from natural to highly polluted urban areas. Fundamentals are presented in a manner valuable not only to graduate students, postdoctoral fellows, and atmospheric chemists, but also to scientists and engineers in related areas. The current state of knowledge in this exciting and dynamic area is examined in depth, with emphasis on the chemical and physical interactions between the troposphere and the stratosphere. This book concludes by drawing on material in the 15 previous chapters to explore its application to the development of reliable risk assessments and effective control strategies for ozone, acids, particles, and airborne toxic chemicals. Note de contenu : 1- Overview of the Chemistry of Polluted and Remote Atmospheres
2- The Atmospheric System
3- Spectroscopy and Photochemistry: Fundamentals
4- Photochemistry of Important Atmospheric Species
5- Kinetics and Atmospheric Chemistry
6- Rates and Mechanisms of Gas-Phase Reactions in Irradiated Organic-NOx-Air Mixtures
7- Chemistry of Inorganic Nitrogen Compounds
8- Acid Deposition: Formation and Fates of Inorganic and Organic Acids in the Troposphere
9- Particles in the Troposphere
10- Airborne Polycyclic Aromatic Hydrocarbons and Their Derivatives: Atmospheric Chemistry and Toxicological Implications
11- Analytical Methods and Typical Atmospheric Concentrations for Gases and Particles
12- Homogeneous and Heterogeneous Chemistry in the Stratosphere
13- Scientific Basis for Control of Halogenated Organics
14- Global Tropospheric Chemistry and Climate Change
15- Indoor Air Pollution: Sources, Levels, Chemistry, and Fates
16- Applications of Atmospheric Chemistry: Air Pollution Control Strategies and Risk Assessments for Tropospheric Ozone and Associated Photochemical Oxidants, Acids, Particles, and Hazardous Air PollutantsNuméro de notice : 19703 Affiliation des auteurs : non IGN Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62866 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19703-01 47.50 Livre Centre de documentation En réserve M-103 Disponible Detection of storm losses in alpine forest areas by different methodical approaches using high-resolution satellite data [pixel-based classification and object-oriented classification] / Marcel Schwarz (2001)
Titre : Detection of storm losses in alpine forest areas by different methodical approaches using high-resolution satellite data [pixel-based classification and object-oriented classification] Type de document : Article/Communication Auteurs : Marcel Schwarz, Auteur ; C. Steinmeier, Auteur ; Lars T. Waser, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 2001 Conférence : EARSeL 2001, 21st international symposium, Observing our environment from space : news solutions for a new millennium 14/05/2001 16/05/2001 Paris France Importance : pp 251 - 257 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Alpes
[Termes IGN] analyse comparative
[Termes IGN] classification
[Termes IGN] dommage matériel
[Termes IGN] forêt
[Termes IGN] image Ikonos
[Termes IGN] image SPOT
[Termes IGN] risque naturel
[Termes IGN] segmentation d'image
[Termes IGN] Suisse
[Termes IGN] tempête
[Termes IGN] texture d'imageRésumé : (Auteur) Based on the detection of storm losses in Swiss alpine forest areas, two different digital classification approaches were compared. In contrast to the pixel based classification we investigated an object-oriented classification procedure. The eCognition software package of Definiens offers this possibility. The comparison was performed for images with different spatial resolution - very high resolution images of IKONOS, and images of SPOT in the sharpened mode. The evaluation of the IKONOS image indicated a significantly higher accuracy for the object-oriented classification approach than for the pixel-based method. The eCognition software handles the high level of detail and the associated high texture better than the pixelbased parallelepiped-algorithm. The quality of the pixel-based approach, which takes into account only the spectral information and some derived data-products is limited for very high resolution images. The classification of the SPOT presented approximately the same results for both methods. Numéro de notice : C2001-031 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64939
Titre : L'élévation du niveau de la mer et les espaces côtiers : le mythe et la réalité Type de document : Monographie Auteurs : R. Paskoff, Auteur Editeur : Paris : Institut Océanographique Année de publication : 2001 Collection : Propos, ISSN 1269-7435 Importance : 190 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-2-903581-27-5 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomorphologie
[Termes IGN] delta
[Termes IGN] dune
[Termes IGN] effet de serre
[Termes IGN] estuaire
[Termes IGN] falaise
[Termes IGN] lagune
[Termes IGN] littoral
[Termes IGN] marais
[Termes IGN] niveau de la mer
[Termes IGN] niveau moyen des mers
[Termes IGN] plage
[Termes IGN] risque naturelRésumé : (Editeur) L'auteur fait le point sur les problèmes que pose la perspective d'une élévation du niveau planétaire de la mer dans les prochaines décennies, si le réchauffement de l'atmosphère, attendu de l'effet de serre lié aux activités humaines, devait se confirmer. Il étudie le comportement du niveau marin au cours des cent dernières années et celui prévu pour le 21ème siècle, sur la base des plus récentes estimations du groupe intergouvernemental pour l'évolution du climat. Celles-ci indiquent une tendance à la hausse qui devrait s'accélérer. Inondation, érosion et salinisation sont les conséquences attendues de cette hausse sur différents types d'espaces côtiers : falaises, plages et dunes, marais maritimes, mangroves, récifs coralliens, estuaires, deltas et lagunes. A ces phénomènes, les sociétés se doivent de trouver les réponses adéquates : convient-il de résister ou au contraire de s'adapter, en reculant devant l'avancée de la mer ? Numéro de notice : 13019 Affiliation des auteurs : non IGN Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54851 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13019-01 47.20 Livre Centre de documentation Géographie - Géosciences Disponible Evaluating offshore wind energy resource by space borne radar sensors: toward a multi-source approach / Nicolas Fichaux (2001)
PermalinkEvaluation of "Mitch" hurricane damages in central America using satellite imagery / P. Romeijn (2001)
PermalinkPermalinkGeomatics for environmental applications, geoENV III, Avignon, France, November 22-24 2000 / Pascal Monestiez (2001)
PermalinkPermalinkPermalinkInvestigation and improvement of airborne laser scanning technique for monitoring surface elevation changes of glaciers / E. Favey (2001)
PermalinkMonitoring natural disasters and 'hot spots' of land cover change with SPOT Vegetation data to assess regions at risks / F. Lupo (2001)
PermalinkPermalinkPermalinkPermalinkPermalinkSpatial and temporal distribution of atmospheric water vapor using space geodetic techniques / Lars Peter Kruse (2001)
PermalinkTempêtes en France : cartographier les dégâts avec les données satellitaires / Spot image in SPOT magazine, n° 33 (01/01/2001)
PermalinkThe devastation of Venezuela by heavy rains in December 1999: disaster monitoring and evaluation of damages using ERS InSAR tandem data and SPOT images / E. Nezry (2001)
PermalinkThe use of global navigation satellite systems (GNSS) signals in numerical weather prediction (NWP) / Lidia Cucurull Molina (2001)
PermalinkLes changements climatiques : conséquences pour la sylviculture / Yves Bastien in Revue forestière française, Numéro spécial (2000)
PermalinkL'océan physique révélé par l'altimétrie satellitale / Y. Menard in La lettre de Medias, n° 12 (décembre 2000)
PermalinkPermalinkUne méthode pour mesurer et spatialiser une contrainte climatique : l'enneigement sur le réseau routier du Massif central / F. Serre in Espace géographique, vol 29 n° 4 (octobre - décembre 2000)
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