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Comparison of L- and X-band PolSAR data for characterization of polarization orientation angle shift induced by man-made structure / K. Iribe (2007)
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Titre : Comparison of L- and X-band PolSAR data for characterization of polarization orientation angle shift induced by man-made structure Type de document : Article/Communication Auteurs : K. Iribe, Auteur ; M. Sato, Auteur Editeur : Paris : Agence Spatiale Européenne ASE / European Space Agency ESA Année de publication : 2007 Collection : ESA Specialist Panel, ISSN 1609-042X num. 644 Conférence : POLinSAR 2007, 3rd International Workshop on Science and Applications of SAR Polarimetry and Polarimetric Interferometry 22/01/2007 26/01/2007 Frascati Italie OA Proceedings Importance : 6 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] analyse comparative
[Termes IGN] bande L
[Termes IGN] bande X
[Termes IGN] détail topographique artificiel
[Termes IGN] données polarimétriques
[Termes IGN] image radar moirée
[Termes IGN] Japon
[Termes IGN] milieu urbain
[Termes IGN] polarimétrie radar
[Termes IGN] polarisation
[Termes IGN] SendaïRésumé : (Auteur) In this paper, we offer an overview of the frequency characteristics on the polarization orientation angle shifts induced by Man-made structures. Nowadays, it is recognized that this parameter is closely related to the target azimuth slope. The algorithm to estimate the orientation angle shifts from polarimetric SAR data of urban area was suggested. By means of this algorithm, we compare longer wavelength L-band and shorter wavelength X-band polarimetric SAR measurements over the same area to understand what useful information can be derived from these measurements. In addition, we examine the similarities and differences of these datasets acquired with different frequency bands. The overview is demonstrated by JAXA L-band and NICT X-band Pi-SAR data over Sendai city, Japan. Numéro de notice : 13579 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64265 Documents numériques
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13579_polinsar2007_iribe.pdfAdobe Acrobat PDFContinuum removed band depth analysis for detecting the effects of natural gas, methane and ethane reflectance / M.F. Noomen in Remote sensing of environment, vol 105 n° 3 (15/12/2006)
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[article]
Titre : Continuum removed band depth analysis for detecting the effects of natural gas, methane and ethane reflectance Type de document : Article/Communication Auteurs : M.F. Noomen, Auteur ; Andrew K. Skidmore, Auteur ; Freek Van Der Meer, Auteur ; Herbert H.T. Prins, Auteur Année de publication : 2006 Article en page(s) : pp 262 - 270 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande visible
[Termes IGN] gaz naturel
[Termes IGN] photosynthèse
[Termes IGN] réflectance végétale
[Termes IGN] santé
[Termes IGN] spectrophotométrie
[Termes IGN] végétationRésumé : (Auteur) It is known that natural gas in the soil affects vegetation health, which may be detected through analysis of reflectance spectra. Since natural gas is invisible, changes in the vegetation could potentially indicate gas leakage. Although it is known that gas in soil affects plant reflectance, the relationship between natural gas and the development and reflectance properties of plants has not been studied. The objective of this study was to test whether natural gas and its two main components, methane and ethane, affect vegetation reflectance in the chlorophyll and water absorption regions. An experiment was carried out in which maize (Zea mays) plants were grown in pots that were flushed with 10 l of gas per day for 39 + 4 days. Leaf reflectance was measured once a week with a spectrophotometer. The reflectance was analysed using continuum removal of the blue (400–550 nm), red (550–750 nm) and two water absorption features (1370–1570 nm and 1870–2170 nm), after which the band depths and normalized band depths were analyzed for each treatment. The band depth analysis showed that ethane caused an initial increase of 10% in reflectance between 560 and 590 nm, followed by a decrease during the course of the experiment. Normalized band depth analysis showed that ethane caused a reflectance shift of 1 to 5 nm towards longer wavelengths compared to the control reflectance in the visible region. All gases caused an increase in reflectance in the water absorption bands. The physiological reflectance index, PRI, which has previously linked water stress to photosynthetic activity, suggested that the hydrocarbon gases (particularly ethane) decreased the photosynthetic activity of the plants. The combination of reduced band depths in the chlorophyll and water absorption regions and the increased PRI suggests that ethane gas in the soil hampered a normal water uptake by maize plants in an early stage of their growth. Although further research is necessary to upscale the results from the laboratory to the field, the increased reflectance in the 560–590 nm region caused by ethane together with the increased PRI are promising indicators for gas leakage. Copyright Elsevier Numéro de notice : A2006-558 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.07.009 En ligne : https://doi.org/10.1016/j.rse.2006.07.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28281
in Remote sensing of environment > vol 105 n° 3 (15/12/2006) . - pp 262 - 270[article]Apport de la télédétection radar et de la géophysique aéroportée à la connaissance géologique de la province de la Nyanga (sud-ouest du Gabon) / S. Abouma Simba in Photo interprétation, vol 42 n° 4 (Décembre 2006)
[article]
Titre : Apport de la télédétection radar et de la géophysique aéroportée à la connaissance géologique de la province de la Nyanga (sud-ouest du Gabon) Type de document : Article/Communication Auteurs : S. Abouma Simba, Auteur ; J.P. Deroin, Auteur ; J.M. Regnoult, Auteur Année de publication : 2006 Article en page(s) : pp 23 - 32 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande C
[Termes IGN] bande L
[Termes IGN] bande X
[Termes IGN] carte géologique
[Termes IGN] fracturation
[Termes IGN] Gabon
[Termes IGN] géomagnétisme
[Termes IGN] géomorphologie locale
[Termes IGN] image JERS
[Termes IGN] image radar
[Termes IGN] image Radarsat
[Termes IGN] ressources minérales
[Termes IGN] télédétection en hyperfréquenceRésumé : (Auteur) L'étude comparée des images radar, aéroportée Goodyear (bande X) et satellitales RADARSAT (bande C) et JERS-1 (bande L), croisée avec des données de géophysique aéroportée (radiométrie, magnétisme) permet de cartographier les grandes structures et ensembles structuraux dans la province géologique de la Nyanga. A grande échelle, la discrimination des objets géologiques via la réalisation de la carte des faciès, est facilitée par les caractéristiques de la mosaïque RADARSAT et de l'image ternaire (U, K, Th). Dans les zones où les lithologies sont contrastées et vigoureusement structurées (chaîne du Mayombe et synclinal de la Nyanga), l'utilisation de la mosaïque RADARSAT est déterminante. L'extraction des faciès radar est difficile dans les zones telles que le massif du Chaillu (fortement pénéplané) ou le domaine affecté par l'orogenèse éburnéenne, tandis que l'apport des données de la géophysique aéroportée, notamment l'image ternaire, est plus important. Copyright Editions Eska Numéro de notice : A2006-599 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28322
in Photo interprétation > vol 42 n° 4 (Décembre 2006) . - pp 23 - 32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 104-06041 RAB Revue Centre de documentation En réserve L003 Disponible Wind resource assessment from C-band SAR / M.B. Christiansen in Remote sensing of environment, vol 105 n° 1 (15/11/2006)
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Titre : Wind resource assessment from C-band SAR Type de document : Article/Communication Auteurs : M.B. Christiansen, Auteur ; W Koch, Auteur Année de publication : 2006 Article en page(s) : pp 68 - 81 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse comparative
[Termes IGN] bande C
[Termes IGN] direction
[Termes IGN] écart type
[Termes IGN] erreur systématique
[Termes IGN] gradient
[Termes IGN] image Envisat-ASAR
[Termes IGN] image ERS-SAR
[Termes IGN] Nord, mer du
[Termes IGN] vent
[Termes IGN] vitesseRésumé : (Auteur) Using accurate inputs of wind speed is crucial in wind resource assessment, as predicted power is proportional to the wind speed cubed. First, wind speeds retrieved from a series of 91 ERS-2 SAR and Envisat ASAR images, at moderate wind speeds (2–15 m s- 1), were validated against in situ measurements from an offshore mast in the North Sea. The wind direction input, necessary for SAR wind speed retrievals, was obtained from the meteorological mast and from a local gradient analysis of wind streaks in the SAR images. A wind speed standard deviation of not, vert, similar 1.1 m s- 1 was found when in situ wind directions were used. The use of local gradient wind directions yielded a standard deviation of not, vert, similar 1.3 m s- 1. Wind speeds retrieved from three geophysical model functions (CMOD-IFR2, CMOD4, and CMOD5) were compared. The best approximation to the in situ measurements of wind speed was found for CMOD-IFR2, despite a bias on the order of - 0.3 m s- 1. CMOD4 retrievals also underestimated the wind speed, whereas the bias on CMOD5 retrievals was negligible. Then, wind resource assessments were made from the SAR-based wind observations to show how errors in wind speed from the different SAR wind retrievals were reflected in the wind statistics. The mean wind speed, obtained for all of the 91 SAR scenes, was linked closely to the bias of SAR wind retrievals. Agreement to 1 15% of the in situ measurements was found for all the wind retrieval methods tested. The accuracy of power density estimates for the entire data set was evaluated by the standard deviation of SAR wind retrievals relative to the in situ measurements. SAR wind fields retrieved with CMOD-IFR2, using in situ wind direction inputs, exactly yielded the power density predicted from in situ measurements alone. The SAR-based wind resource assessment also corresponded well to predictions from longer time series of in situ measurements. This indicates that a reliable wind resource assessment may be achieved from a series of randomly selected SAR images. The findings presented here could be useful in future wind resource assessment based on SAR images. Copyright Elsevier Numéro de notice : A2006-503 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.06.005 En ligne : https://doi.org/10.1016/j.rse.2006.06.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28227
in Remote sensing of environment > vol 105 n° 1 (15/11/2006) . - pp 68 - 81[article]Estimating volume change of mountain glaciers using SRTM and map-based topographic data / A.B. Surazakov in IEEE Transactions on geoscience and remote sensing, vol 44 n° 10 Tome 2 (October 2006)
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Titre : Estimating volume change of mountain glaciers using SRTM and map-based topographic data Type de document : Article/Communication Auteurs : A.B. Surazakov, Auteur ; V. Aizen, Auteur Année de publication : 2006 Article en page(s) : pp 2991 - 2995 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] Asie centrale
[Termes IGN] bande C
[Termes IGN] carte topographique
[Termes IGN] détection d'erreur
[Termes IGN] détection de changement
[Termes IGN] glace
[Termes IGN] glacier
[Termes IGN] image SRTM
[Termes IGN] modèle numérique de surface
[Termes IGN] volume (grandeur)Résumé : (Auteur) This paper describes a method for estimating the volume change of mountain glaciers using the Shuttle Radar Topography Mission (SRTM) C-band data (2000) and a digital elevation model (DEM) generated from topographic maps. This approach was developed with SRTM data and topographic maps of 1:25000 scale (1977) from the Akshiirak glaciers (Tien Shan, Central Asia). The DEM for 1977 was generated using 10-m contour lines from 18 map sheets covering the Akshiirak massif and surrounding area. The nominal vertical accuracy of the maps is 3.3 m. The standard deviation of the differences between the map-derived DEM and the SRTM data on glacier-free areas of less than 25$^circ$is 6.3 m. A single localized region in the western periphery of the study area with systematic error in the SRTM data from$-$20 to 12 m on a 30-km spatial scale was found and excluded from the error analysis. Assuming a 10-m map error on the upper snow-covered glacier areas, the estimated root-mean-square error of the glacier surface change is 8.2 m. From 1977 to 1999, the average glacier surface thinning is 15.1 m, and the estimated volume loss is 6.15$hboxkm^3$. The rate of the Akshiirak glacier volume loss has increased by 2.7 times, compared with historical data from 1943 to 1977. The SRTM data show an opportunity for quantifying climatic and dynamic surface elevation changes in mountain glaciers. Ice, Cloud, and land Elevation Satellite (ICESat) laser altimetry and SRTM data could also be used for the estimation of short-term surface changes of mountain glaciers. Copyright IEEE Numéro de notice : A2006-505 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2006.875357 En ligne : https://doi.org/10.1109/TGRS.2006.875357 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28229
in IEEE Transactions on geoscience and remote sensing > vol 44 n° 10 Tome 2 (October 2006) . - pp 2991 - 2995[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-06101B RAB Revue Centre de documentation En réserve L003 Disponible Landsat-7 long-term acquisition plan radiometry: evolution over the time / B. Markham in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 10 (October 2006)
PermalinkDetection of forest decline using Ikonos sensor for cork oak (Quercus suber l.) woods in south Spain / F. Cano in Geocarto international, vol 21 n° 3 (September - November 2006)
PermalinkEvaluation of hyperspectral data for geological mapping / Muneendra Kumar in Geoinformatics, vol 9 n° 6 (01/09/2006)
PermalinkTemporal influences on Landsat-5 thematic image in visible band / Y. Liu in International Journal of Remote Sensing IJRS, vol 27 n°15-16 (August 2006)
PermalinkSoil moisture mapping and AMSR-E validation using the PSR in SMEX02 / R. Bindlish in Remote sensing of environment, vol 103 n° 2 (30/07/2006)
PermalinkMapping an oil pipeline: DEMs and ortho-imagery for Colombia from dual-band side-looking radar / J. Allen in GIM international, vol 20 n° 7 (July 2006)
PermalinkA technique for generating natural colour images from false colour composite images / S.K. Patra in International Journal of Remote Sensing IJRS, vol 27 n°12-13-14 (July 2006)
PermalinkLandsat cross-calibration based on near simultaneous imaging of common targets / P.M. Teillet in Remote sensing of environment, vol 102 n° 3-4 (15 June2006)
PermalinkClassification of fully polarimetric SAR data for land use cartography / Cédric Lardeux in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
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PermalinkHigh-resolution change estimation of soil moisture using L-band radiometer and Radar observations made during the SMEX02 experiments / U. Narayan in IEEE Transactions on geoscience and remote sensing, vol 44 n° 6 (June 2006)
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