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PALSAR radiometric and geometric calibration / M. Shimada 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 3915 - 3932 Titre : PALSAR radiometric and geometric calibration Type de document : Article/Communication Auteurs : M. Shimada, Auteur ; O. Isoguchi, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 3915 - 3932 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] étalonnage géométrique [Termes IGN] étalonnage radiométrique [Termes IGN] image ALOS-PALSAR [Termes IGN] PALSAR Résumé : (Auteur) This paper summarizes the results obtained from geometric and radiometric calibrations of the Phased-Array L-Band Synthetic Aperture Radar (PALSAR) on the Advanced Land Observing Satellite, which has been in space for three years. All of the imaging modes of the PALSAR, i.e., single, dual, and full polarimetric strip modes and scanning synthetic aperture radar (SCANSAR), were calibrated and validated using a total of 572 calibration points collected worldwide and distributed targets selected primarily from the Amazon forest. Through raw-data characterization, antenna-pattern estimation using the distributed target data, and polarimetric calibration using the Faraday rotation-free area in the Amazon, we performed the PALSAR radiometric and geometric calibrations and confirmed that the geometric accuracy of the strip mode is 9.7-m root mean square (rms), the geometric accuracy of SCANSAR is 70 m, and the radiometric accuracy is 0.76 dB from a corner-reflector analysis and 0.22 dB from the Amazon data analysis (standard deviation). Polarimetric calibration was successful, resulting in a VV/HH amplitude balance of 1.013 (0.0561 dB) with a standard deviation of 0.062 and a phase balance of 0.612deg with a standard deviation of 2.66deg. Copyright IEEE Numéro de notice : A2009-491 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2009.2023909 En ligne : https://doi.org/10.1109/TGRS.2009.2023909 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30120 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-09121A	RAB	Revue	Centre de documentation	En réserve L003	Disponible

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 IGN] Advanced Visible & Near Infrared Radiometer [Termes IGN] étalonnage géométrique [Termes IGN] étalonnage radiométrique [Termes IGN] image ALOS-PRISM [Termes IGN] Panchromatic Remote Sensing Instrument for Stereo Mapping [Termes 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 DOI : 10.1109/TGRS.2009.2028692 En ligne : https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5256244 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30121 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-09121A	RAB	Revue	Centre de documentation	En réserve L003	Disponible