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Synergism of synthetic aperture radar and visible & infrared data for forest type discrimination / D.G. Leckie in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 9 (september 1990)
[article]
Titre : Synergism of synthetic aperture radar and visible & infrared data for forest type discrimination Type de document : Article/Communication Auteurs : D.G. Leckie, Auteur Année de publication : 1990 Article en page(s) : pp 1237 - 1246 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande infrarouge
[Termes IGN] bande visible
[Termes IGN] carte de la végétation
[Termes IGN] correction radiométrique
[Termes IGN] flore locale
[Termes IGN] forêt
[Termes IGN] image multibande
[Termes IGN] image radar
[Termes IGN] multispectral scanner
[Termes IGN] Ontario (Canada)
[Termes IGN] polarisation
[Termes IGN] radar à antenne synthétiqueNuméro de notice : A1990-123 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/1990journal/sep/1990_sep_1237-1246 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25539
in Photogrammetric Engineering & Remote Sensing, PERS > vol 56 n° 9 (september 1990) . - pp 1237 - 1246[article]Knowledge-based classification of an urban area using texture and context information in Landsat-TM imagery / L. Moller-Jensen in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 6 (june 1990)
[article]
Titre : Knowledge-based classification of an urban area using texture and context information in Landsat-TM imagery Type de document : Article/Communication Auteurs : L. Moller-Jensen, Auteur Année de publication : 1990 Article en page(s) : pp 899 - 904 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse structurale
[Termes IGN] analyse texturale
[Termes IGN] Bangkok (Thaïlande)
[Termes IGN] classification à base de connaissances
[Termes IGN] flore locale
[Termes IGN] image Landsat-TM
[Termes IGN] milieu urbain
[Termes IGN] réflectance
[Termes IGN] réseau routier
[Termes IGN] système expertNuméro de notice : A1990-151 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/1990journal/jun/1990_jun_899-904.p [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25567
in Photogrammetric Engineering & Remote Sensing, PERS > vol 56 n° 6 (june 1990) . - pp 899 - 904[article]Determination of surface reflectance and estimates of atmospheric optical depth and single scattering albedo from Landsat Thematic Mapper data / J.E. Conel in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)
[article]
Titre : Determination of surface reflectance and estimates of atmospheric optical depth and single scattering albedo from Landsat Thematic Mapper data Type de document : Article/Communication Auteurs : J.E. Conel, Auteur Année de publication : 1990 Article en page(s) : pp 783 - 828 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] albedo
[Termes IGN] diffusion du rayonnement
[Termes IGN] image Landsat-TM
[Termes IGN] modèle atmosphérique
[Termes IGN] propagation ionosphérique
[Termes IGN] propagation troposphérique
[Termes IGN] radiance
[Termes IGN] réflectance
[Termes IGN] simulation
[Termes IGN] spectromètre
[Termes IGN] traitement d'image
[Termes IGN] transmittance
[Termes IGN] Wyoming (Etats-Unis)Résumé : (Auteur) Ground reflectance data of selected targets for calibration of a Landsat Thematic Mapper (TM) image of Wind River Basin, Wyoming, acquired November 21, 1982, were analysed. The calibration lines, one for each band, are derived from linear regression analysis of scatter plots of ground bidirectional spectral reflectance versus the Thematic Mapper (TM) scanner response. The field-measured reflectances were obtained with a portable spectrometer at 10nm spectral resolution in November 1983. The empirical equations derived were used to predict the ground reflectance of five unknown targets scattered throughout the Wind River and adjacent Bighorn Basins. Subsequently, in July 1984, field measurements were made over these targets with field spectrometers and with a hand-held radiometer with filters matching those of the TM. The agreement between predicted and measured quantities, mostly within the uncertainties of the field observations, was obtained, suggesting that the ground reflectance properties of the areas studied were approximately the same in November 1982 and July 1984, and that, as suggested by visual inspection of the images themselves, the atmosphere during TM data acquisition was relatively homogeneous from place to place over the area of our field observations. In addition to determining ground reflectance, we also used these field-derived calibration relationships together with current radiometric calibration data for the TM in a simple homogeneous atmospheric model to estimate emergent radiance at the satellite. From the emergent radiance and the atmospheric model, we derived estimates, on a straightforward algebraic inversion scheme, of single scattering albedo (o>0) and optical depth (t) for the atmosphere. These relationships follow from the fact that the intercept value of a field calibration line, determined at zero surface reflectance, provides an estimate of the path radiance; the slope is a function of the two-way transmittance. To disentangle the atmospheric properties we assumed the atmosphere to be isotropically scattering. This is the only assumption that can be made considering the essentially single nadir-looking direction of TM surface observations. For this model the slope and intercept provide two functions of a>0 and t, whose numerical magnitudes together with the solar spectral irradiances are known. These equations were solved simultaneously, exactly in the single scattering approximation and iteratively with multiple scattering. Uncertainties in the derived quantities were estimated from the standard errors provided by the regression analysis. The results for optical depth variation with wavelength are 20 per cent greater than those predicted from the model of reference, a LOWTRAN 6 simulation of mid-latitude winter conditions. This led to consideration of sources of error in the analysis. All of these lead to overestimates of the optical depth, and include: (1) atmospheric scattering from the surroundings over the standard targets (adjacency effects), (2) contamination of surface targets by other components, e.g., ground by snow and snow by ground, vegetation, or shadows, and (3) the neglect of anisotropic scattering in the atmospheric model. Numéro de notice : A1990-089 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955057 En ligne : https://doi.org/10.1080/01431169008955057 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25506
in International Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 783 - 828[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-90051 RAB Revue Centre de documentation En réserve L003 Disponible Estimating suspended sediment concentrations from spectral reflectance data / L. Nanu in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)
[article]
Titre : Estimating suspended sediment concentrations from spectral reflectance data Type de document : Article/Communication Auteurs : L. Nanu, Auteur ; C. Robertson, Auteur Année de publication : 1990 Article en page(s) : pp 913 - 920 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] eaux côtières
[Termes IGN] particule
[Termes IGN] réflectance spectrale
[Termes IGN] sédiment
[Termes IGN] turbidité des eauxRésumé : (Auteur) A method for estimating sediment concentrations at different depths in coastal waters from measured spectral reflectance above the sea is proposed. The water backscattering coefficient is obtained by integrating a scattering cross section derived from Mie theory over a Junge type particle-size distribution. The results for turbid water, near an arid coast, with vertical mixing, shows a maximum of particle concentration in the middle layer, while the same method applied to reflectance data for 'blue' water, gives a relative concentration of sediment that gradually increases with depth. Numéro de notice : A1990-097 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955065 En ligne : https://doi.org/10.1080/01431169008955065 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25514
in International Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 913 - 920[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-90051 RAB Revue Centre de documentation En réserve L003 Disponible A ratio vegetation index adjusted for soil brightness / D.J. Major in International Journal of Remote Sensing IJRS, vol 11 n° 5 (May 1990)
[article]
Titre : A ratio vegetation index adjusted for soil brightness Type de document : Article/Communication Auteurs : D.J. Major, Auteur ; F. Baret, Auteur ; Gérard Guyot, Auteur Année de publication : 1990 Article en page(s) : pp 727 - 740 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] couleur du sol
[Termes IGN] humidité du sol
[Termes IGN] indice de végétation
[Termes IGN] luminance lumineuse
[Termes IGN] rayonnement proche infrarouge
[Termes IGN] réflectance du solRésumé : (Auteur) Improved parameters for a soil-adjusted vegetation index (SAVI) are derived using SAIL model output for simulated wheat canopy reflectance. The SAVI is much less sensitive than the ratio vegetation index to changes in background caused by soil colour or surface soil moisture content. The parameters are developed to minimize variability due to soil brightness over the practical range of solar elevations, leaf angle distributions (LAD) and leaf area indices (LAI). The parameters are added to the near-infrared (NIR) and red reflectances before calculating the NIR/red ratio. Three new versions of the SAVI are developed based on the theoretical consideration of the effects of wet and dry soils. All three are superior to the NIR/red ratio, the perpendicular vegetation index and a soil-adjusted vegetation index. Our simplest version requires the addition of a parameter to the red reflectance. The second and third versions require an iterative procedure to find the best parameters that are then added to the red or the NIR and red reflectances. In general, SAVI adjustment parameters required to remove soil-brightness effects decrease as factors that obscure the soil-surface increase. Low solar elevation and high LAI result in increasingly negative values for the parameters. The NIR/red ratio is the vegetation index least influenced by soil brightness at LAI greater than three. Our iterated versions have lowest overall errors but are occasionally subject to higher errors at the combination of low zenith angles and erectophile canopies. The SAVI based on the bare soil reflectance performs best on field data. Numéro de notice : A1990-085 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955053 En ligne : https://doi.org/10.1080/01431169008955053 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25502
in International Journal of Remote Sensing IJRS > vol 11 n° 5 (May 1990) . - pp 727 - 740[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-90051 RAB Revue Centre de documentation En réserve L003 Disponible Combination of digital elevation models with Spot-1 HRV multispectral imagery for reflectance factor mapping / C. Yang in Remote sensing of environment, vol 32 n° 1 (01/04/1990)PermalinkHyperspherical direction cosine transformation for separation of spectral and illumination information in digital scanner data / G.W. Pouch in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 4 (april 1990)PermalinkRadar backscatter measurements over saline ice / S. Gogineni in International Journal of Remote Sensing IJRS, vol 11 n° 4 (April 1990)PermalinkTemperature-independent spectral indices in thermal infrared bands / François Becker in Remote sensing of environment, vol 32 n° 1 (01/04/1990)PermalinkUse of narrow-band spectra to estimate the fraction of absorbed photosynthetically active radiation / F.G. Hall in Remote sensing of environment, vol 32 n° 1 (01/04/1990)PermalinkComparison of two models for simulating the soil-vegetation composite reflectance of a developing cotton canopy / A.J. Richardson in International Journal of Remote Sensing IJRS, vol 11 n° 3 (March 1990)PermalinkA model for retrieval of surface spectral reflectance from satellite radiance measurements using realistic atmospheric aerosol profiles / S. Basu in International Journal of Remote Sensing IJRS, vol 11 n° 3 (March 1990)PermalinkSignificance of the remotely sensed thermal infrared measurements obtained over a citrus orchard / J.A. Sobrino in ISPRS Journal of photogrammetry and remote sensing, vol 44 n° 6 (March 1990)PermalinkTowards a local split window method over land surface / François Becker in International Journal of Remote Sensing IJRS, vol 11 n° 3 (March 1990)PermalinkA window-based technique for combining Landsat Thematic Mapper thermal data with higher-resolution multispectral data over agricultural lands / M.S. Moran in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 3 (march 1990)Permalink