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Systematic corrections of AVHRR image composites for temporal studies / J. Cihlar in Remote sensing of environment, vol 89 n° 2 (30/01/2004)
[article]
Titre : Systematic corrections of AVHRR image composites for temporal studies Type de document : Article/Communication Auteurs : J. Cihlar, Auteur ; R. Latifovic, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 217 - 233 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] correction d'image
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] image en couleur composée
[Termes IGN] image Landsat-TM
[Termes IGN] image NOAA-AVHRR
[Termes IGN] réflectance végétaleRésumé : (Auteur) For quantitative studies of vegetation dynamics, satellite data need to be corrected for spurious effects. In this study, we have applied several changes to an earlier advanced very high resolution radiometer (AVHRR) processing methodology (ABC3; [Remote Sens. Environ. 60 (1997) 35; J. Geophys. Res.Atmos, 102 (1997) 29625; Can. J. Remote Sens. 23 (1997) 163]), to better represent the various physical processes causing contamination of the AVHRR measurements. These included published recent estimates of the NOAA-11 and NOAA-14 AVHRR calibration trajectories for channels 1 and 2; the best available estimates for the water vapour, aerosol and ozone amounts at the time of AVHRR data acquisition; an improved bidirectional reflectance algorithm that also takes into consideration surface topography; and an improved image screening algorithm for contaminated pixels. Unlike the previous study that compared the composite images to a single-date AVHRR image, we employed coincident TM images to approximate the AVHRR pixel field of view during the data acquisition. Compared to ABC3, the modified procedure ABOV2 was found to improve the accuracy of AVHRR pixel reflectance estimates, both in the sensitivity (slope) of the regression and in r2. The improvements were especially significant in AVHRR channel 1. In comparison with reference values derived from two full TM scenes, the corrected AVHRR surface reflectance estimates had average standard errors values of + 0.009 for AVHRR C1, + 0.019 for C2, and + 0.04 for NDVI; the corresponding r2 values were 0.55, 0.80, and 0.50, respectively. The changes in ABC3V2 were not able to completely remove interannual variability for land cover types with little or no vegetation cover, which would be expected to remain stable over time, and they increased the interannual variability of mixed forest and grassland. These results are attributed to a combination of increased sensitivity to interannual dynamics on one hand, and the inability to remove all sources of noise for barren or sparsely vegetated northern land cover types on the other. Numéro de notice : A2004-025 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2002.06.007 En ligne : https://doi.org/10.1016/j.rse.2002.06.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26553
in Remote sensing of environment > vol 89 n° 2 (30/01/2004) . - pp 217 - 233[article]Narrowband-to-broadband albedo conversion for glacier ice and snow: equations based on modeling and ranges of validity of the equations / W. Greuell in Remote sensing of environment, vol 89 n° 1 (15/01/2004)
[article]
Titre : Narrowband-to-broadband albedo conversion for glacier ice and snow: equations based on modeling and ranges of validity of the equations Type de document : Article/Communication Auteurs : W. Greuell, Auteur ; J. Oerlemans, Auteur Année de publication : 2004 Article en page(s) : pp 95 - 105 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] albedo
[Termes IGN] éclairement énergétique
[Termes IGN] erreur moyenne quadratique
[Termes IGN] glace
[Termes IGN] image Landsat-TM
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image Terra-MISR
[Termes IGN] image Terra-MODIS
[Termes IGN] neige
[Termes IGN] réflectance
[Termes IGN] transfert radiatifRésumé : (Auteur) In this paper, we propose equations for narrowband-to-broadband (NTB) albedo conversion for glacier ice and snow for four types of satellite sensors : thematic mapper (TM), advanced very high resolution radiometer (AVHRR), moderate resolution imaging spectroradiometer (MODIS), and multi-angle imaging spectroradiometer (MISR). We do this on the basis of spectral albedos and incident spectral irradiances generated with radiative-transfer models of the (sub)surface (a two-stream model) and the atmosphere, respectively. First, we establish equations for reference values of atmospheric components and the surface elevation. These equations describe measurements with root-mean-square differences of ~0.016. We then show that the "reference equations" also perform well when total ozone and aerosol optical depth are changed with respect to the reference. The negative effect of humidity and elevation variations on the performance of the equations can be eliminated by adding a correction term. We argue that narrowband albedos are much less sensitive to variations in the incident spectral irradiance than broadband albedos. Hence, our conclusions about the effects of variations in atmospheric composition and elevation are also valid for equations for NTB conversion proposed in other papers. Numéro de notice : A2004-010 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.10.010 En ligne : https://doi.org/10.1016/j.rse.2003.10.010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26538
in Remote sensing of environment > vol 89 n° 1 (15/01/2004) . - pp 95 - 105[article]Quantitative remote sensing of land surfaces / Shunlin Liang (2004)
Titre : Quantitative remote sensing of land surfaces Type de document : Monographie Auteurs : Shunlin Liang, Auteur Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2004 Collection : Wiley Series in Remote Sensing Importance : 534 p. Format : 16 x 24 cm + un cédérom ISBN/ISSN/EAN : 978-0-471-28166-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] correction atmosphérique
[Termes IGN] données 4D
[Termes IGN] image Landsat-TM
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image optique
[Termes IGN] manteau neigeux
[Termes IGN] occupation du sol
[Termes IGN] optique géométrique
[Termes IGN] réflectance du solIndex. décimale : 35.40 Applications de télédétection - généralités Numéro de notice : 20073 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Monographie DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62899 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20073-01 35.40 Livre Centre de documentation Télédétection Disponible Spatial resolution improvement of remote sensing images by fusion of subpixel-shifted multi-observation images / Y. Lu in International Journal of Remote Sensing IJRS, vol 24 n° 23 (December 2003)
[article]
Titre : Spatial resolution improvement of remote sensing images by fusion of subpixel-shifted multi-observation images Type de document : Article/Communication Auteurs : Y. Lu, Auteur ; M. Inamura, Auteur Année de publication : 2003 Article en page(s) : pp 4647 - 4660 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] conflation
[Termes IGN] fusion d'images
[Termes IGN] image à haute résolution
[Termes IGN] image Landsat-TM
[Termes IGN] image multicapteur
[Termes IGN] limite de résolution géométrique
[Termes IGN] précision infrapixellaire
[Termes IGN] qualité géométrique (image)
[Termes IGN] résolution multipleRésumé : (Auteur) Multi-observation of satellite remote-sensing provides the ability to achieve a higher spatial resolution image. Based on the relation between sensors of different spatial resolution, this paper presents a multi-observation in spatial called subpixel-shifted multi-observation, to acquire a more accurate image of higher spatial resolution than the original observations. In this kind of observation, the same area on the ground is observed repeatedly with a spatial resolution in a subpixel shifted way. All the acquired observation images are combined into a higher resolution image. This formulated as a super-resolution equation. When comparing the existing super-resolution algorithms, we find that the Iterative Back-Projection (IBP) method suggested by Peleg et al. is an appropriate and effective method for solving this problem. Based on IBP, a pratical implementation is presented. Computer experiments on remote sensing images and error analysis show its effectiveness. Some problems, such as back projection, undersampling, and fusion of observed samples, are discussed further. The resultant image from this method has both better quality and higher spatial resolution than the original observation. Numéro de notice : A2003-311 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001595064 En ligne : https://doi.org/10.1080/01431160310001595064 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22607
in International Journal of Remote Sensing IJRS > vol 24 n° 23 (December 2003) . - pp 4647 - 4660[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-03231 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Existe-t-il une "mémoire" de l'espace en Roumanie post-communiste ? / Simona Niculescu in Revue internationale de géomatique, vol 13 n° 4 (décembre 2003 – février 2004)
[article]
Titre : Existe-t-il une "mémoire" de l'espace en Roumanie post-communiste ? Type de document : Article/Communication Auteurs : Simona Niculescu, Auteur Année de publication : 2003 Article en page(s) : pp 493 - 509 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse comparative
[Termes IGN] analyse diachronique
[Termes IGN] cadastre ancien
[Termes IGN] histoire
[Termes IGN] image Landsat-TM
[Termes IGN] image SPOT
[Termes IGN] morphologie mathématique
[Termes IGN] paysage agricole
[Termes IGN] Roumanie
[Termes IGN] structure agraire
[Termes IGN] structure spatialeRésumé : (Auteur) en concevant la morphologie des paysages agricoles comme une expression des différentes formes spatiales, on se propose, dans cet article, de donner des explications géographiques diachrono-comparatives sur toute une série de " générations " des systèmes agraires roumains à partir des cadastres de 1856, d'images satellites Landsat de 1989 (du régime communiste), de 1997 (du régime post-communiste) et d'images SPOT de 1998 (du régime post-communiste). On s'y interroge aussi sur le poids du passé dans ce sens que toute génération humaine exerce son action sur un espace différencié, " lourd " d'héritage. Il s'agit de l'héritage de la mémoire de l'espace, une mémoire enregistrée par l'inscription spatiale des actions de transformation et d'aménagement de la terre. Il faut comprendre cet espace reçu comme le produit à la fois de processus naturels et des actions des générations antérieures. Numéro de notice : A2003-398 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.3166/rig.13.479-492 En ligne : https://doi.org/10.3166/rig.13.479-492 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26478
in Revue internationale de géomatique > vol 13 n° 4 (décembre 2003 – février 2004) . - pp 493 - 509[article]Réservation
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