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Separating surface emissivity and temperature using two-channel spectral indices and emissivity composites and comparison with a vegetation fraction method / P. Dash in Remote sensing of environment, vol 96 n° 1 (15/05/2005)
[article]
Titre : Separating surface emissivity and temperature using two-channel spectral indices and emissivity composites and comparison with a vegetation fraction method Type de document : Article/Communication Auteurs : P. Dash, Auteur ; F. Göttsche, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 1 - 17 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse comparative
[Termes IGN] correction atmosphérique
[Termes IGN] données de terrain
[Termes IGN] données météorologiques
[Termes IGN] éclairement énergétique
[Termes IGN] emissivité
[Termes IGN] erreur
[Termes IGN] image NOAA-AVHRR
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] radiance
[Termes IGN] rayonnement infrarouge thermique
[Termes IGN] saison
[Termes IGN] simulation de surface
[Termes IGN] température au sol
[Termes IGN] thermal infrared multispectral scannerRésumé : (Auteur) The temperature-independent thermal infrared spectral indices (TISI) method is employed for the separation of land surface temperature (LST) and emissivity from surface radiances (atmospherically corrected satellite data). The daytime reflected solar irradiance and the surface emission at ~3.8 um have comparable magnitudes. Using surface radiances and a combination of day-night 2-channel TISI ratios, the ~3.8 um reflectivity is derived. For implementing the TISI method, coefficients for NOAA 9-16 AVHRR channels are obtained. A numerical analysis with simulated surface radiances shows that for most surface types (showing nearly Lambertian behavior) the achievable accuracy is ~0.005 for emissivity (AVHRR channel-5) and ~1.5 K for LST. Data from the European Centre for Medium-Range Weather Forecasts (ECMWF) is used for calculation of atmospheric attenuation. Comparisons are made over a part of central Europe on two différent dates (seasons). Clouds pose a major problem to surface observations; hence, monthly emissivity composites are derived. Additionally, using TISI-based monthly composites of emissivities, a normalized difference vegetation index (NDVI)-based method is tuned to the particular study area and the results are intercompared. Once the coefficients are known, the NDVI method is easily implemented but holds well only for vegetated areas. The error of the NDVI-based emissivities (with respect to the TISI results) ranges between -0.038 and 0.032, but for vegetated areas the peak of the error-histogram is at ~0.002. The algorithm for retrieving emissivity via TISI was validated with synthetic data. Due to the different spatial scales of satellite and surface measurements and the lack of homogeneous areas, which are representative for low-resolution pixels and ground measurements, ground-validation is a daunting task. However, for operational products ground-truth validation is necessary. Therefore, also an approach to identify suitable validation sites for meteorological satellite products in Europe is described. Numéro de notice : A2005-209 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.12.023 En ligne : https://doi.org/10.1016/j.rse.2004.12.023 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27346
in Remote sensing of environment > vol 96 n° 1 (15/05/2005) . - pp 1 - 17[article]L'apport des données du satellite SPOT 5 à l'étude des zones humides en Bretagne nord : application au bassin versant du Jaudy-Guindy-Bizien / S. Saloum in Photo interprétation, vol 41 n° 1 (Mars 2005)
[article]
Titre : L'apport des données du satellite SPOT 5 à l'étude des zones humides en Bretagne nord : application au bassin versant du Jaudy-Guindy-Bizien Type de document : Article/Communication Auteurs : S. Saloum, Auteur Année de publication : 2005 Article en page(s) : pp 20 - 28 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bassin hydrographique
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] détection automatique
[Termes IGN] données de terrain
[Termes IGN] flore locale
[Termes IGN] image SPOT 5
[Termes IGN] matrice de confusion
[Termes IGN] modèle hydrographique
[Termes IGN] qualité des eaux
[Termes IGN] rayonnement infrarouge moyen
[Termes IGN] rayonnement proche infrarouge
[Termes IGN] Teravue
[Termes IGN] traitement d'image
[Termes IGN] zone humideRésumé : (Auteur) Le traitement d'images issues du satellite Spot 5 constitue un outil avantagé pour localiser et quantifier les zones humides à l'échelle de bassins versants. Cet avantage réside dans sa haute résolution spatiale et dans la présence de ses quatre canaux : deux dans le visible, un dans le proche infrarouge et un dans l'infrarouge moyen. Même des zones humides de petite surface imbriquées dans un fort contexte agricole et bocager peuvent être détectées. La méthode utilisée est l'approche probabiliste de la classification par maximum de vraisemblance. Elle a été appliquée avec satisfaction sur les 520 kM2 du bassin versant du Jaudy-Guindy-Bizien (Côtes-d'Armor, 22) avec environ 90 % de points bien classés. Cette méthodologie de détection automatique des zones humides peut s'intégrer dans un programme d'enrichissement de bases de données qui visent à préciser par l'utilisation de modèles hydrologiques l'apport de chaque élément paysager dans l'amélioration de la qualité de l'eau sur les bassins versants. Numéro de notice : A2005-366 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27502
in Photo interprétation > vol 41 n° 1 (Mars 2005) . - pp 20 - 28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 104-05011 RAB Revue Centre de documentation Revues en salle Disponible Airborne experimental measurements of the angular variations in surface temperature over urban areas: case study of Marseille (France) / J.P. Lagouarde in Remote sensing of environment, vol 93 n° 4 (15/12/2004)
[article]
Titre : Airborne experimental measurements of the angular variations in surface temperature over urban areas: case study of Marseille (France) Type de document : Article/Communication Auteurs : J.P. Lagouarde, Auteur ; P. Moreau, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 443 - 462 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] correction atmosphérique
[Termes IGN] erreur de mesure
[Termes IGN] Marseille
[Termes IGN] milieu urbain
[Termes IGN] rayonnement infrarouge thermique
[Termes IGN] tâche claire
[Termes IGN] température de luminance
[Termes IGN] température de surface
[Termes IGN] thermographie aérienneRésumé : (Auteur) The directional surface temperatures over urban areas are measured using an airborne TIR camera equipped with wide-angle lenses. The experimental design is described and the possible sources of errors related to the instruments and the atmosphere are analysed and corrections proposed. The data acquisition protocol is adapted to provide directional TIR measurements in a - 60° to + 60° range for zenith and 0 to 360° for azimuth view angles. Two parts of the city of Marseille, the densely built old city centre and a built/vegetated mixture of individual houses and gardens in a suburb, have been studied during summer 2001 in the framework of the UBL-ESCOMPTE project. The results obtained reveal important hot spot effects and differences of surface brightness temperatures varying between - 5 and 7 K between nadir and off-nadir measurements, according to azimuth view angles. Acquisitions performed over the two areas also illustrate the impact of the surface structure and presence of vegetation on the hot spot. An example application for the correction of two temporal series of NOAA 14 and NOAA 16 data is given. Numéro de notice : A2004-460 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.12.011 En ligne : https://doi.org/10.1016/j.rse.2003.12.011 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26980
in Remote sensing of environment > vol 93 n° 4 (15/12/2004) . - pp 443 - 462[article]Automated detection of thermal features of active volcanoes by means of infrared AVHRR records / N. Pergola in Remote sensing of environment, vol 93 n° 3 (15/11/2004)
[article]
Titre : Automated detection of thermal features of active volcanoes by means of infrared AVHRR records Type de document : Article/Communication Auteurs : N. Pergola, Auteur ; F. Marchese, Auteur ; V. Tramutoli, Auteur Année de publication : 2004 Article en page(s) : pp 311 - 327 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse diachronique
[Termes IGN] anomalie thermique
[Termes IGN] détection automatique
[Termes IGN] éruption volcanique
[Termes IGN] Etna (volcan)
[Termes IGN] fiabilité des données
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image thermique
[Termes IGN] image TIROS-AVHRR
[Termes IGN] méthode robuste
[Termes IGN] prévention des risques
[Termes IGN] rayonnement infrarouge thermique
[Termes IGN] Stromboli (volcan)
[Termes IGN] surveillance géologique
[Termes IGN] tâche claire
[Termes IGN] test de performance
[Termes IGN] volcanRésumé : (Auteur) An innovative, Advanced Very High Resolution Radiometer (AVHRR)-based technique for improved automatic detection of volcanic Hotspots and thermal anomalies is proposed in this paper. It is mainly based on a multitemporal analysis of historical, long-term satellite records. Such a technique basically rests on the Robust AVHRR Techniques (RAT) approach, which has been already successfully applied to sevreral natural and environmental emergencies (e.g., fires, floods, earthquakes). In this work, the proposed technique has been tested on an extended set of eruptive events of Mt. Etna and Stromboli volcanoes. Results achieved, in terms of reliability (low false alarm rate) as well as of effectiveness (detection sensitivity), are described in detail. Moreover, the potential in low-level thermal anomaly detection, as possible pre-eruptive thermal signs, is also addressed and preliminary results obtained for a couple of events, discussed. The study cases here presented show the benefits of such a technique especially when different observational conditions (time/season of pass, atmospheric moisture content, solar illumination, satellite angles of view, etc.) are considered, making such a method globally applicable. The future prospects, also in terms of possible operational scenarios, coming from the implementation of such an approach on the new generation of satellite sensors (such as SEVIRI aboard Meteosat Second Generation) are also discussed. Numéro de notice : A2004-439 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.07.010 En ligne : https://doi.org/10.1016/j.rse.2004.07.010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26959
in Remote sensing of environment > vol 93 n° 3 (15/11/2004) . - pp 311 - 327[article]Derivation of a threshold function for the advanced very high resolution radiometer 3, 75um channel and its application in automatic cloud discrimination over snow/ice surfaces / X. Xiong in International Journal of Remote Sensing IJRS, vol 25 n° 15 (August 2004)
[article]
Titre : Derivation of a threshold function for the advanced very high resolution radiometer 3, 75um channel and its application in automatic cloud discrimination over snow/ice surfaces Type de document : Article/Communication Auteurs : X. Xiong, Auteur ; R. Storvold, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 2995 - 3017 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Alaska (Etats-Unis)
[Termes IGN] albedo
[Termes IGN] analyse discriminante
[Termes IGN] Arctique, océan
[Termes IGN] glace
[Termes IGN] image NOAA-AVHRR
[Termes IGN] luminance lumineuse
[Termes IGN] nébulosité
[Termes IGN] neige
[Termes IGN] nuage
[Termes IGN] rayonnement infrarouge moyen
[Termes IGN] seuillage d'imageRésumé : (Auteur) The distinct contrast between the reflectance of solar radiation in Advanced Very High Resolution Radiometer (AVHRR) channel 3 (3.75 um) by clouds and by bright surfaces provides an effective means of cloud discrimination over snow/ice surfaces. A threshold function for the top- of- atmosphere (TOA) albedo in channel 3 (r3) is derived and used to develop an improved method for cloud discrimination over snow/ice surfaces that makes explicit use of TOA r3. Corrections for radiance anisotropy and temperature effects are required to derive accurate values of r3 from satellite measurements and to utilize the threshold function. It has been used to retrieve cloud cover fractions from National Oceanic and Atmospheric Administration (NOAA)-14 AVHRR data over the Arctic Ocean and over the North Slope of Alaska (NSA) Atmospheric Radiation Measurement (ARM) site in Barrow, Alaska. The retrieved cloud fractions are in good agreement with SHEBA (Surface HEat Budget of the Arctic Ocean) surface visual observations and with NSA cloud radar and lidar observations, respectively. This method can be utilized to improve cloud discrimination over snow/ice surfaces for any satellite sensor with a channel near 3.7 um. Numéro de notice : A2004-297 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001619553 En ligne : https://doi.org/10.1080/01431160310001619553 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26824
in International Journal of Remote Sensing IJRS > vol 25 n° 15 (August 2004) . - pp 2995 - 3017[article]Exemplaires(1)
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