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Calibration of PRISM and AVNIR-2 onboard ALOS Daichi / T. Tadono in IEEE Transactions on geoscience and remote sensing, vol 47 n° 12 Tome 1 (December 2009)

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 47 n° 12 Tome 1 (December 2009) . - pp 4042 - 4050 Titre : Calibration of PRISM and AVNIR-2 onboard ALOS Daichi Type de document : Article/Communication Auteurs : T. Tadono, Auteur ; M. Shimada, Auteur ; H. Murakami, Auteur Année de publication : 2009 Article en page(s) : pp 4042 - 4050 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes descripteurs IGN] Advanced Visible & Near Infrared Radiometer [Termes descripteurs IGN] étalonnage géométrique [Termes descripteurs IGN] étalonnage radiométrique [Termes descripteurs IGN] image ALOS-PRISM [Termes descripteurs IGN] Panchromatic Remote Sensing Instrument for Stereo Mapping [Termes descripteurs IGN] rayonnement proche infrarouge Résumé : (Auteur) The Advanced Land Observing Satellite [(ALOS); nicknamed ldquoDaichirdquo] was successfully launched on January 24, 2006, and it continues to work very well. This paper describes the calibrations of two optical instruments onboard ALOS, which are the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) and Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2). PRISM consists of three panchromatic radiometers and is used to derive a digital surface model (DSM) with high spatial resolution, which is an objective of the ALOS mission. AVNIR-2 has four radiometric bands from blue to near infrared, which are used for investigating regional environment issues such as land-use and land-cover classifications, and disaster monitoring. In this paper, we introduce the calibration and validation plan, methodologies, accuracy assessments of the standard products, image quality evaluations for PRISM and AVNIR-2, and their results. Geometric calibration is important in generating a precise DSM by a stereo pair image of PRISM. The relative geometric calibrations of both PRISM and AVNIR-2 are conducted by evaluating accuracies within one scene and evaluating sensor alignments as absolute calibration. For absolute geometric accuracies, we achieved 8.1 m for nadir-looking images and 9.3 m for forward- and backward-looking images of PRISM; we also achieved 114.2 m for AVNIR-2. PRISM is also radiometrically calibrated both relatively and absolutely. PRISM relative radiometric calibration is accomplished by using acquired images over homogeneous targets, such as oceans, deserts, ice, and snow areas, as well as nighttime observation. Simultaneously observed images with calibrated AVNIR-2 are used for absolute radiometric calibration by cross-calibration. The absolute radiometric accuracy of the PRISM nadir-looking radiometer is similar to that of AVNIR-2. Copyright IEEE Numéro de notice : A2009-492 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30121 [article]

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National Spatial Data Infrastructure Act / H. Murakami in GIM international, vol 22 n° 2 (February 2008)

Public [article]  inGIM international > vol 22 n° 2 (February 2008) . - pp 15 - 17 Titre : National Spatial Data Infrastructure Act Type de document : Article/Communication Auteurs : H. Murakami, Auteur Année de publication : 2008 Article en page(s) : pp 15 - 17 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes descripteurs IGN] base de données localisées [Termes descripteurs IGN] diffusion de données [Termes descripteurs IGN] droit [Termes descripteurs IGN] infrastructure nationale des données localisées [Termes descripteurs IGN] Japon [Termes descripteurs IGN] système d'information géographique Résumé : (Auteur) In may 2007, a new bill on National Spatial Infrastructure was enacted by the japanese government, aiming to provide a legal framework for the development and distribution of geo-information based on GIS and space-based Positioning, Navigation and Timing (PNT). Copyright Reed Business Information Numéro de notice : A2008-024 Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29019 [article]

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