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Radiative transfer codes applied to hyperspectral data for the retrieval of surface reflectance / K. Staenz in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 3 (December 2002 - January 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 3 (December 2002 - January 2003) . - pp 194 - 203 Titre : Radiative transfer codes applied to hyperspectral data for the retrieval of surface reflectance Type de document : Article/Communication Auteurs : K. Staenz, Auteur ; J. Secker, Auteur ; B.C. Gao, Auteur ; C. Davis, Auteur ; C. Nadeau, Auteur Année de publication : 2002 Article en page(s) : pp 194 - 203 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] Airborne Visible/InfraRed Imaging Spectrometer [Termes IGN] extraction [Termes IGN] image AVIRIS [Termes IGN] image hyperspectrale [Termes IGN] réflectance de surface [Termes IGN] transfert radiatif Résumé : (Auteur) The present investigation evaluates surface reflectance retrieved from Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Compact Airborne Spectrographic Imager (casi) data using the atmospheric radiative transfer (RT) codes: atmospheric removal program (ATREM), Canadian advanced modified 5S (CAM5S) and moderate atmospheric radiance and transmittance model (MODTRAN4). The retrieved surface reflectances were compared with groundbased reflectances acquired with a GER3700-spectroradiometer for a playa and canola target. The results showed that the best overall performance was achieved with MODTRAN4 (average relative error of 2.3%), followed by ATREM (3.6%) and CAM5S (4.2%). Major differences occur in the stronger gas absorption regions. At wavelengths unaffected by strong gaseous absorption, the performance was similar for the three RT codes even though ATREM and CAM5S make extensive use of analytical expressions and, therefore, have faster execution times. Copyright ISPRS Numéro de notice : A2002-295 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00121-1 En ligne : https://doi.org/10.1016/S0924-2716(02)00121-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22206 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-02051	SL	Revue	Centre de documentation	Revues en salle	Disponible

Impact of terrain slope and aspect on radargrammetric DEM accuracy / Thierry Toutin in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 3 (December 2002 - January 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 3 (December 2002 - January 2003) . - pp 228 - 240 Titre : Impact of terrain slope and aspect on radargrammetric DEM accuracy Type de document : Article/Communication Auteurs : Thierry Toutin , Auteur Année de publication : 2002 Article en page(s) : pp 228 - 240 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] appariement d'images [Termes IGN] couple stéréoscopique [Termes IGN] image radar moirée [Termes IGN] image Radarsat [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] modèle numérique de surface [Termes IGN] pente [Termes IGN] radargrammétrie Résumé : (Auteur) This paper shows results of digital elevation models (DEMs) generated from various RADARSAT stereopairs (fine, standard, extended) over three different topographic study sites (flattorolling, rollingtomountainous, mountainoustosteep) using 31) parametric modcling developed at the Canada Centre for Remote Sensing (CCRS) and an automated image matching method. Reference topographic DEMs were first used to compute terrain slope and aspect and then to evaluate the accuracy of the stereoderived DEMs as a function of the slopes and aspects. The DEM accuracy was almost linearly correlated with the terrain slope, with the larger errors in the steepest slopes. In addition, the stronger the stereo radar geometry, the more heterogeneous the DEM is. For the aspect, the best and worse results generally occurred in the foreslopes and backslopes, respectively, and there is no specific trend in the azimuth. Finally, the more pronounced the relief, the higher the correlation between the elevation accuracy and the aspect is and the larger the variations of the elevation accuracy are. Copyright ISPRS Numéro de notice : A2002-297 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00123-5 En ligne : https://doi.org/10.1016/S0924-2716(02)00123-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22208 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-02051	SL	Revue	Centre de documentation	Revues en salle	Disponible

Calibration and validation of SAR interferometry for DEM generation / M. Crosetto in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 3 (December 2002 - January 2003)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 3 (December 2002 - January 2003) . - pp 213 - 227 Titre : Calibration and validation of SAR interferometry for DEM generation Type de document : Article/Communication Auteurs : M. Crosetto, Auteur Année de publication : 2002 Article en page(s) : pp 213 - 227 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] effet atmosphérique [Termes IGN] espace image [Termes IGN] espace objet [Termes IGN] géoréférencement [Termes IGN] image radar moirée [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] méthode des moindres carrés [Termes IGN] modèle numérique de surface [Termes IGN] modélisation géométrique de prise de vue [Termes IGN] point d'appui Résumé : Auteur) A complete interferometric SAR (InSAR) procedure for the generation of digital elevation models (DEMs) is described, stressing the InSAR geometric aspects. A new approach to transform the interferometric phases to terrain heights is presented, which aims at achieving an accurate geocoding of the InSARgenerated DEMs. It is based on a rigorous model that connects image space to object space and on a least squares (LS) calibration of the InSAR geometry with ground control points (GCPs). The procedure may include the fusion of data coming from ascending and descending pairs of SAR images. For this purpose, a simultaneous calibration of the geometry of different InSAR pairs is proposed. It allows reducing the number of required GCPs using tie points, in analogy with the photogrammetric procedures. The validation of two DEMs, one coming from an ascending ERS1 SAR pair and the other one derived by fusion of ascending and descending ERS1 data, is described paying attention to the atmospheric effects on the generated DEMs. Numéro de notice : A2002-296 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00107-7 En ligne : https://doi.org/10.1016/S0924-2716(02)00107-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80418 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-02051	SL	Revue	Centre de documentation	Revues en salle	Disponible