Centre de documentation
scientifique

Dépouillements

A first in-flight absolute calibration of the Chilean Earth Observation Satellite / C. Mattar in ISPRS Journal of photogrammetry and remote sensing, vol 92 (June 2014)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 92 (June 2014) . - pp 16 - 25 Titre : A first in-flight absolute calibration of the Chilean Earth Observation Satellite Type de document : Article/Communication Auteurs : C. Mattar, Auteur ; J. Hernandez, Auteur ; A. Santamaría-Artigas, Auteur ; M. Inzunza, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 16 - 25 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur en peigne [Termes IGN] capteur imageur [Termes IGN] Chili [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] satellite d'observation de la Terre [Termes IGN] simulation de signal Résumé : (Auteur) This work describes the first in-flight absolute calibration of the “Sistema Satelital para la Observación de la Tierra” (SSOT or Fasat-C). It was performed on January 29th 2013 at Antumapu site located in the southern area of Santiago, Chile. A description of the procedure is presented which includes both ground measurement and atmospheric characterization. The Chilean satellite for Earth observation carries on board a “New AstroSat Optical Modular Instrument” (NAOMI) high-resolution pushbroom imager which provides a 1.45 m ground sampling distance in the panchromatic (0.455–0.744 m) channel and a 5.8 m ground sampling distance for the green (0.455–0.52 m), blue (0.528–0.588 m), red (0.625–0.695 m) and near-infrared (0.758–0.881 m) channels from a 620 km orbit. Radiometric calibration was carried out in order to estimate the land leaving radiance and bidirectional reflectance at the top of the atmosphere. To correct the reflectance data for atmospheric effects, the Second Simulation of a Satellite Signal in the Solar Spectrum (6S) code was used. Aerosol Optical Depth (AOD), water vapor and ozone content were obtained from MOD04, MOD05 and MOD07 products respectively, which are derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) data. Statistical results such as BIAS, SIGMA and RMSE were calculated for the comparison between surface reflectance values and in situ measurements. Results show that the overall accuracy of the atmospherically corrected surface reflectance calculated from Fasat-C imagery can be estimated to around +5%, with a R2 coefficient of 0.939 between atmospherically corrected reflectance values and in situ measurements. The atmospheric correction applied in this work by combining MODIS data and the 6S radiative transfer code could be used for further calibration of the Fasat-C images, although in situ atmospheric irradiance measurements are necessary to estimate reliable values of surface reflectance. Future validation tasks have been considered for further applications to natural resources management and surface land cover classification. Numéro de notice : A2014-288 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2014.02.017 En ligne : https://doi.org/10.1016/j.isprsjprs.2014.02.017 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33191 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2014061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Cloud removal for remotely sensed images by similar pixel replacement guided with a spatio-temporal MRF model / Qing Cheng in ISPRS Journal of photogrammetry and remote sensing, vol 92 (June 2014)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 92 (June 2014) . - pp 54 - 68 Titre : Cloud removal for remotely sensed images by similar pixel replacement guided with a spatio-temporal MRF model Type de document : Article/Communication Auteurs : Qing Cheng, Auteur ; Huanfeng Shen, Auteur ; Liangpei Zhang, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 54 - 68 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] champ aléatoire de Markov [Termes IGN] correction automatique [Termes IGN] correction d'image [Termes IGN] image Aqua-MODIS [Termes IGN] image Landsat [Termes IGN] image multitemporelle [Termes IGN] modèle conceptuel de données spatio-temporelles [Termes IGN] nuage [Termes IGN] pixel [Termes IGN] température de surface Résumé : (Auteur) Cloud cover is generally present in remotely sensed images, which limits the potential of the images for ground information extraction. Therefore, removing the clouds and recovering the ground information for the cloud-contaminated images is often necessary in many applications. In this paper, an effective method based on similar pixel replacement is developed to solve this task. A missing pixel is filled using an appropriate similar pixel within the remaining region of the target image. A multitemporal image is used as the guidance to locate the similar pixels. A pixel-offset based spatio-temporal Markov random fields (MRF) global function is built to find the most suitable similar pixel. The proposed method was tested on MODIS and Landsat images and their land surface temperature products, and the experiments verify that the proposed method can achieve highly accurate results and is effective at dealing with the obvious atmospheric and seasonal differences between multitemporal images. Numéro de notice : A2014-289 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2014.02.015 En ligne : https://doi.org/10.1016/j.isprsjprs.2014.02.015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33192 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2014061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Unmanned aerial systems for photogrammetry and remote sensing: A review / Ismael Colomina in ISPRS Journal of photogrammetry and remote sensing, vol 92 (June 2014)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 92 (June 2014) . - pp 79 - 97 Titre : Unmanned aerial systems for photogrammetry and remote sensing: A review Type de document : Article/Communication Auteurs : Ismael Colomina, Auteur ; P. Molina, Auteur Année de publication : 2014 Article en page(s) : pp 79 - 97 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] drone [Termes IGN] état de l'art [Termes IGN] navigation aérienne [Termes IGN] photogrammétrie aérienne [Termes IGN] prise de vue aérienne [Termes IGN] télédétection aérienne Résumé : (Auteur) We discuss the evolution and state-of-the-art of the use of Unmanned Aerial Systems (UAS) in the field of Photogrammetry and Remote Sensing (PaRS). UAS, Remotely-Piloted Aerial Systems, Unmanned Aerial Vehicles or simply, drones are a hot topic comprising a diverse array of aspects including technology, privacy rights, safety and regulations, and even war and peace. Modern photogrammetry and remote sensing identified the potential of UAS-sourced imagery more than thirty years ago. In the last five years, these two sister disciplines have developed technology and methods that challenge the current aeronautical regulatory framework and their own traditional acquisition and processing methods. Navety and ingenuity have combined off-the-shelf, low-cost equipment with sophisticated computer vision, robotics and geomatic engineering. The results are cm-level resolution and accuracy products that can be generated even with cameras costing a few-hundred euros. In this review article, following a brief historic background and regulatory status analysis, we review the recent unmanned aircraft, sensing, navigation, orientation and general data processing developments for UAS photogrammetry and remote sensing with emphasis on the nano-micro-mini UAS segment. Numéro de notice : A2014-290 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2014.02.013 En ligne : https://doi.org/10.1016/j.isprsjprs.2014.02.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33193 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2014061	RAB	Revue	Centre de documentation	En réserve L003	Disponible