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Landscape controls over major nutrients and primary productivity of Arctic lakes / P. Pathak in Cartography and Geographic Information Science, vol 39 n° 4 (October 2012)
[article]
Titre : Landscape controls over major nutrients and primary productivity of Arctic lakes Type de document : Article/Communication Auteurs : P. Pathak, Auteur ; R. Stine, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 187 - 198 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Alaska (Etats-Unis)
[Termes IGN] Arctique
[Termes IGN] azote
[Termes IGN] bassin hydrographique
[Termes IGN] chlorophylle
[Termes IGN] image radar
[Termes IGN] image SPOT
[Termes IGN] interaction spatiale
[Termes IGN] lac
[Termes IGN] macrophyte
[Termes IGN] marais
[Termes IGN] occupation du sol
[Termes IGN] phosphore
[Termes IGN] plante ripicole
[Termes IGN] production primaire brute
[Termes IGN] surveillance
[Termes IGN] zone tamponRésumé : (Auteur) Increasing surface temperatures in the Arctic are affecting the dynamics between lakes and their landscapes. In this paper, we use landscape metrics for land cover and statistical analysis to explore the interactions between such measures as shape and patch density indices for land cover and lake primary productivity. The objective was to identify metrics that could be used to predict lake primary productivity, as measured by chlorophyll a, total nitrogen and total phosphorus estimates. Land cover and landscape metrics for the Toolik region of Alaska were derived using satellite imagery and Fragstats software. The metrics, treated as independent variables in a stepwise regression, were derived for two levels of land cover. The first comprised the entire watershed studied; the second was derived using buffers created around water channels within each watershed. A statistically significant model for each dependent variable was obtained. Results suggest that, of the metrics tested; those related to broad leaf vegetation complexes were most useful in predicting lake primary productivity. The Landscape Shape Index for riparian patches and the Patch Density for heath complex were the two most important metrics for predicting variation in chlorophyll a (p Numéro de notice : A2012-574 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.1559/15230406394187 En ligne : https://doi.org/10.1559/15230406394187 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32020
in Cartography and Geographic Information Science > vol 39 n° 4 (October 2012) . - pp 187 - 198[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 032-2012041 RAB Revue Centre de documentation En réserve L003 Disponible Space weather and the Australian ionospheric prediction service: ready for the Solar Max 2012 / Dave Neudegg in Space research today, n° 184 (01/08/2012)
[article]
Titre : Space weather and the Australian ionospheric prediction service: ready for the Solar Max 2012 Type de document : Article/Communication Auteurs : Dave Neudegg, Auteur Année de publication : 2012 Article en page(s) : pp 16 - 24 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] atmosphère terrestre
[Termes IGN] Australie
[Termes IGN] impact sur les données
[Termes IGN] propagation ionosphérique
[Termes IGN] signal GNSS
[Termes IGN] surveillanceRésumé : (Auteur) [Introduction] The Ionospheric Prediction Service (IPS) is the "Radio and Space services" branch of the bureau of meteorology. IPS monitors the solar-terrestrial space environment to predict its varaibility and effect on technological systems. Numéro de notice : A2012-692 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32138
in Space research today > n° 184 (01/08/2012) . - pp 16 - 24[article]
Titre : Optical survey strategies and their application to space surveillance Type de document : Rapport Auteurs : Tim Flohrer, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2012 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 87 Importance : 178 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-34-5 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] débris spatial
[Termes IGN] orbitographie
[Termes IGN] stratégie
[Termes IGN] surveillanceIndex. décimale : 30.84 Applications de géodésie spatiale à l'atmosphère Résumé : (Editeur) [préface] This publication of Tim Flohrer focuses on strategies to search for space debris using optical observations and on the application of these strategies for space surveillance. The topic covers a wide range of aspects, starting with the actual detection of space debris on frames acquired by optical telescopes, and ending with the build-up and maintenance of a catalogue of orbit of these objects. An optimum search strategy aims at maximizing the number of observed objects of a reference population defined by the sizes and the orbital elements of the objects, by optimizing the observations sequences of telescopes at one or several sites. The design of the strategies must take into account geometrical boundary conditions – the objects must be visible from a given site – as well as radiometric constraints – the objects must be bright enough to be detected against the sky background. The build-up and maintenance of an orbit catalogue require periodic acquisition of astrometric positions of the catalogue objects. This may be achieved either by scheduling dedicated follow-up observations or by designing survey strategies in a way that enough observations of all objects are gained “incidentally”. All of the above-mentioned aspects are discussed in this publication. The author developed a software tool allowing to simulate search and observation strategies starting with the generation of individual observations and ending with a full orbit determination. This combination is rather unique and was a key element for the success of the strategies developed by Tim Flohrer. In addition to strategies for ground-based networks of telescopes the paper discusses concepts for the search of small size debris and for surveys of entire orbit regions using space-based optical sensors. The strategies to search for and monitor objects in the geostationary ring and the region of the global navigation satellite systems presented in this work became widely recognized in the scientific community. Concepts currently developed in the framework of the ESA initiative to establish an European space surveillance and tracking system are based to a great extent on Tim Flohrer’s work. Note de contenu : 1. Introduction and motivation
2. Space situational awareness, space debris, and space surveillance principles
2.1 Space situational awareness
2.2 Space surveillance
2.3 Space debris and its lifecycle
2.4 Space surveillance principles
2.5 Sensors with space surveillance capabilities
3. Observation fundamentals, data reduction, and orbit modelling
3.1 Reference systems
3.2 Orbital regimes
3.3 Observations
3.4 Orbits of artificial satellites
3.5 Two-line element (TLE) sets
4. Simulation environment for optical observations
4.1 PROOF
4.2 CelMech
4.3 Simulation environment
4.4 Application of the simulation environment to a proposed space-based optical observation scenario
4.5 Conclusions
5. Ground-based optical observation strategies
5.1 Population evolution
5.2 Accessibility of population
5.3 Proposed observation strategies
6. A system proposal for space-based optical space surveillance
6.1 SSA-related observation strategies with the SBO architecture
6.2 Radiometric characteristics of the SBO observing high altitudes
6.3 Coverage of reference populations
6.4 Orbit determination based on simulations
6.5 Conclusion
7. Conclusion and recommendations
A. Performance of initial orbit determination from space-based observations
B. Simulated orbit determination results for a system proposal for space-based optical space surveillanceNuméro de notice : 15701 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport de recherche En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-87.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62764 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15701-01 30.84 Livre Centre de documentation Géodésie Disponible Review of geometric and radiometric analyses of paintings / Fabio Remondino in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
[article]
Titre : Review of geometric and radiometric analyses of paintings Type de document : Article/Communication Auteurs : Fabio Remondino, Auteur ; Luigi Barazzetti, Auteur ; Marco Scaioni, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 439 - 461 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] capteur actif
[Termes IGN] déformation d'image
[Termes IGN] image multibande
[Termes IGN] patrimoine culturel
[Termes IGN] patrimoine mobilier
[Termes IGN] peinture
[Termes IGN] photogrammétrie terrestre
[Termes IGN] qualité radiométrique (image)
[Termes IGN] restitution
[Termes IGN] surveillance
[Termes IGN] télémétrie laser terrestre
[Termes IGN] valeur radiométriqueRésumé : (Auteur) This paper presents an overview of a number of diagnostic campaigns carried out to assess the conservation state of paintings. The specific characteristics required in cultural heritage applications have been investigated and are reported, where two main fields are considered: radiometric analyses using multispectral images and 3D surveying for geometric deformation analysis by means of photogrammetry and laser scanning. The activities described were accomplished in interdisciplinary teams, composed of photogrammetrists, art-historians, restorers and experts of non-destructive diagnostic techniques. Numéro de notice : A2011-496 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2011.00664.x En ligne : http://dx.doi.org/10.1111/j.1477-9730.2011.00664.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31390
in Photogrammetric record > vol 26 n° 136 (December 2011 - February 2012) . - pp 439 - 461[article]vol 26 n° 136 - December 2011 - February 2012 - Special issue: ISPRS commission V [5] Symposium 2010 close range image measurement techniques (Bulletin de Photogrammetric record) / Remote sensing and photogrammetry society
[n° ou bulletin]
Titre : vol 26 n° 136 - December 2011 - February 2012 - Special issue: ISPRS commission V [5] Symposium 2010 close range image measurement techniques Type de document : Périodique Auteurs : Remote sensing and photogrammetry society, Auteur Année de publication : 2011 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie
[Termes IGN] acquisition d'images
[Termes IGN] archéologie
[Termes IGN] atlas numérique
[Termes IGN] champ de vitesse
[Termes IGN] édifice religieux
[Termes IGN] géomorphologie
[Termes IGN] mesure géométrique
[Termes IGN] surveillanceNuméro de notice : 106-201104 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Numéro de périodique En ligne : http://onlinelibrary.wiley.com/doi/10.1111/phor.2011.26.issue-136/issuetoc Format de la ressource électronique : URL sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=14984 [n° ou bulletin]Contient
- Aeolian beach sand transport monitored by terrestrial laser scanning / Roderik Lindenbergh in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
- Investigation of UAV systems and flight modes for photogrammetric applications / Henri Eisenbeiss in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
- Photogrammetric techniques for voxel-based flow velocity field measurement / Patrick Westfeld in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
- Review of geometric and radiometric analyses of paintings / Fabio Remondino in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
- Surveying and modelling the Main Spire of Milan Cathedral using multiple data sources / F. Fassi in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
- 3D-sutra-interactive analysis tool for a Web atlas of scanned sutra inscriptions in China / N. Schmidt in Photogrammetric record, vol 26 n° 136 (December 2011 - February 2012)
The ionosphere : effects, GPS modeling and the benefits for space geodetic techniques / Manuel Hernández-Pajares in Journal of geodesy, vol 85 n° 12 (December 2011)PermalinkICESat GLAS data for urban environment monitoring / P. Gong in IEEE Transactions on geoscience and remote sensing, vol 49 n° 3 (March 2011)PermalinkSmall satellites for global coverage: Potential and limits / R. Sandau in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 6 (November - December 2010)PermalinkModernization milestone: the GPS civil monitoring performance specification / T. Nagle in Inside GNSS, vol 5 n° 1 (January - February 2010)Permalinkvol 86 n° 1 - 01/12/2009 - Proceedings of the EGU G16 symposium "Geodetic and geodynamic programmes of the central Europe initiative", [actes], Vienna, 19 - 24 April 2009 (Bulletin de Reports on geodesy) / J. SledzinskiPermalinkResearch contibutions in the field of enginering surveying within period 2007-2008 (Bulletin de Reports on geodesy) / Witold ProszynskiPermalinkMultitemporal Satellite High resolution images for the knowledge and the monitoring of the Iraqi archaeological sites: The case of Seleucia on the Tigris / G. Scardozzi in Photo interprétation, European journal of applied remote sensing, vol 45 n° 4 (novembre 2009)PermalinkA disturbance inventory framework for flexible and reliable landscape monitoring / J. Linke in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 8 (August 2009)Permalinkvol 75 n° 8 - August 2009 - Special issue on change analysis (Bulletin de Photogrammetric Engineering & Remote Sensing, PERS) / American society for photogrammetry and remote sensingPermalinkLand-use mapping in Australia: satellite imagery and property management / L. Blacklock in Geoinformatics, vol 12 n° 4 (01/06/2009)Permalink