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Incorporating surface emissivity into a thermal atmospheric correction / N.A. Brunsell in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 12 (December 2002)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 12 (December 2002) . - pp 1263 - 1269 Titre : Incorporating surface emissivity into a thermal atmospheric correction Type de document : Article/Communication Auteurs : N.A. Brunsell, Auteur ; R. Gillies, Auteur Année de publication : 2002 Article en page(s) : pp 1263 - 1269 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] Advanced Very High Resolution Radiometer [Termes IGN] correction atmosphérique [Termes IGN] emissivité [Termes IGN] image thermique [Termes IGN] Normalized Difference Vegetation Index [Termes IGN] réflectance de surface [Termes IGN] température de surface [Termes IGN] température en altitude Résumé : (Auteur) The issue of incorporating surface emissivity into a thermal atmospheric correction of thermal remotely sensed data is addressed. The Normalized Difference Vegetation Index (NDVI) is derived using atmospherically corrected surface reflectance values, which is subsequently used to estimate the percent Q vegetation cover. Surface emissivity is approximated by a linear interpolation between a minimum bare soil emissivity and a maximum vegetation value of emissivity. An application of the method to an image over the Southern Great Plains 1997 (SGP97) Hydrology Experiment for the Advanced Very High Resolution Radiometer (AVHRR) band 4 demonstrates temperature corrections up to 8°C, with a mean correction at 3.7°C. The temperatures within the fully vegetated pixels show good agreement with air temperature measurements at the time of satellite overpass. Numéro de notice : A2002-298 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/december/2002_dec_1263 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22209 [article]

Creation of digital terrain models using an adaptative Lidar vegetation point removal process / G.T. Raber in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 12 (December 2002)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 12 (December 2002) . - pp 1307 - 1315 Titre : Creation of digital terrain models using an adaptative Lidar vegetation point removal process Type de document : Article/Communication Auteurs : G.T. Raber, Auteur ; J.R. Jensen, Auteur ; S.R. Schill, Auteur ; K. Schuckman, Auteur Année de publication : 2002 Article en page(s) : pp 1307 - 1315 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] carte de la végétation [Termes IGN] données lidar [Termes IGN] erreur [Termes IGN] lasergrammétrie [Termes IGN] modèle numérique de terrain [Termes IGN] végétation Résumé : (Auteur) Commercial small-footprint lidar remote sensing has become an established tool for the creation of digital terrain models (DTMs). Unfortunately, even ofter the application of lidar vegetation point removal algorithms, vertical DTM error is not uniform and varies according to land cover. This paper presents the results of the application of an adaptive lidar vegetation removal process to a raw lidar dataset of a small area in North Carolina. This process utilized an existing lidar vegetation point removal algorithm in which the parameters were adaptively adjusted based on a vegetation map. The vegetation map was derived through the exclusive use of the lidar dataset, making the process independent of ancillary data. The vertical error and surface form of the resulting DTM were then compared to DTMs created using traditional techniques. The results indicate that the adaptive method produces a superior DTM. Numéro de notice : A2002-299 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/december/2002_dec_1307 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22210 [article]