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Correction and characterization of radio frequency interference signatures in L-band synthetic aperture radar data / Franz J. Meyer in IEEE Transactions on geoscience and remote sensing, vol 51 n° 10 (October 2013)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 51 n° 10 (October 2013) . - pp 4961 - 4972 Titre : Correction and characterization of radio frequency interference signatures in L-band synthetic aperture radar data Type de document : Article/Communication Auteurs : Franz J. Meyer, Auteur ; Jeremy B. Nicoll, Auteur ; Anthony P. Doulgeris, Auteur Année de publication : 2013 Article en page(s) : pp 4961 - 4972 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] bande L [Termes IGN] étalonnage spectral [Termes IGN] image radar moirée [Termes IGN] interférence Résumé : (Auteur) Radio frequency interference (RFI) is a known issue in low-frequency radar remote sensing. In synthetic aperture radar (SAR) image processing, RFI can cause severe degradation of image quality, distortion of polarimetric signatures, and an increase of the SAR phase noise level. To address this issue, a processing system was developed that is capable of reliably detecting, characterizing, and mitigating RFI signatures in SAR observations. In addition to being the basis for image correction, the robust RFI-detection algorithms developed in this paper are used to retrieve a wealth of RFI-related information that allows for mapping, characterizing, and classifying RFI signatures across large spatial scales. The extracted RFI information is expected to be valuable input for SAR-system design, sensor operations, and the development of effective RFI-mitigation strategies. The concepts of RFI detection, analysis, and mapping are outlined. Large-scale RFI mapping results are shown. In case studies, the benefit of detailed RFI information for customized RFI filtering and sensor operations is exemplified. Numéro de notice : A2013-601 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2252469 En ligne : https://doi.org/10.1109/TGRS.2013.2252469 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32737 [article]

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Bidirectional reflectance spectrometry of gravel at the Sjökulla test field / J. Peltoniemi in ISPRS Journal of photogrammetry and remote sensing, vol 62 n° 6 (November-December 2007)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 62 n° 6 (November-December 2007) . - pp 434 - 446 Titre : Bidirectional reflectance spectrometry of gravel at the Sjökulla test field Type de document : Article/Communication Auteurs : J. Peltoniemi, Auteur ; J. Piironen, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 434 - 446 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse diachronique [Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF [Termes IGN] étalonnage radiométrique [Termes IGN] étalonnage spectral [Termes IGN] gravier [Termes IGN] image aérienne [Termes IGN] test de performance Résumé : (Auteur) The Sjökulla test site is used for testing and calibrating aerial images. The permanent test field is made of four types of gravel (dark gabbro, grey granite, red granite, white limestone) in two sizes (diameters 8–16 mm and 4–8 mm) set in various patterns. The bidirectional reflection properties of the targets together with their temporal changes must be known in order to carry out radiometric and spectral evaluation and calibration. The bidirectional reflectance distribution functions (BRF) of the gravel have been measured several times in the test fields using portable field goniospectrometers belonging Finnish Geodetic Institute (FGI), and once using the European Goniometic Facility (EGO) of the Joint Research Centre (JRC) at Ispra, Italy. Detailed BRFs have been obtained, showing features typical to particulate media, e.g. a small bowl shape, strong backscattering, and smooth wavelength dependence. Temporal range measurements over several years show that the black gabbro and red granite are fairly stable, while the grey granite has changed somewhat over the years and the white limestone has experienced dramatic darkening effects, requiring action to be taken. The measured BRF data have increased the usability of the test field considerably. The results are also useful in the development and validation of scattering models for particulate media. The site has proved to be a good test bench for goniospectrometric instruments, too. Copyright ISPRS Numéro de notice : A2007-529 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2007.07.009 En ligne : https://doi.org/10.1016/j.isprsjprs.2007.07.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28892 [article]

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Spectral calibration and atmospheric correction of ultra-fine spectral and spatial resolution remote sensing data: Application to CASI-1500 data / L. Guanter in Remote sensing of environment, vol 109 n° 1 (12 July 2007)  

Public [article]  inRemote sensing of environment > vol 109 n° 1 (12 July 2007) . - pp 54 - 65 Titre : Spectral calibration and atmospheric correction of ultra-fine spectral and spatial resolution remote sensing data: Application to CASI-1500 data Type de document : Article/Communication Auteurs : L. Guanter, Auteur ; V. Estelles, Auteur ; J. Moreno, Auteur Année de publication : 2007 Article en page(s) : pp 54 - 65 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] aérosol [Termes IGN] Castille-La Manche [Termes IGN] correction atmosphérique [Termes IGN] épaisseur optique [Termes IGN] étalonnage spectral [Termes IGN] image CASI [Termes IGN] réflectance de surface Résumé : (Auteur) Imaging spectrometers operating in the solar spectrum measure the upwelling reflected solar radiation, and are an important tool in the bio/geochemical characterization of the Earth system. Surface reflectance is usually the starting point for the retrieval of biophysical parameters from remote measurements. Reliable radiometric and spectral calibrations and accurate atmospheric correction are mandatory in the interpretation of the surface reflectance. A complete surface reflectance retrieval scheme specifically designed for ultra-fine spectral resolution (bandwidth from 10 to 2 nm) and spatial resolution (pixel size less than 10 m) imaging spectrometers is presented in this work. The assessment of the spectral calibration is coupled to the removal of the atmospheric distortion so that maps of surface reflectance are derived, as well as columnar water vapor (CWV) maps, estimations of aerosol optical thickness (AOT) and updated sensor gain coefficients and spectral calibration. Radiative transfer calculations are performed by an optimized version of the MODTRAN4 code, which is run before processing each image. The method is tested against Compact Airborne Spectrographic Imager (CASI) 1500 images acquired during the ESA SENtinel-2 and FLuorescence EXperiment (SEN2FLEX) campaigns held in the Barrax (La Mancha, Spain) study site during June and July 2005. A peak-to-peak spectral shift variation of up to 2.3 nm is detected in CASI. Concerning atmospheric products and surface reflectance retrievals, an extensive validation is performed using ground-based measurements. A good correlation between ground measurements and CASI-derived AOT and CWV is found, with a Pearson correlation coefficient r2 up to 0.71 and 0.74, respectively. The subsequent surface reflectance retrievals also hold a good correspondence with ground-based measurements. Copyright Elsevier Numéro de notice : A2007-301 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.12.005 En ligne : https://doi.org/10.1016/j.rse.2006.12.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28664 [article]

A rigorous laboratory calibration method for interior orientation of an airborne linear push-broom camera / Tianen Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 4 (April 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 4 (April 2007) . - pp 369 - 374 Titre : A rigorous laboratory calibration method for interior orientation of an airborne linear push-broom camera Type de document : Article/Communication Auteurs : Tianen Chen, Auteur ; Ryosuke Shibasaki, Auteur ; Z. Lin, Auteur Année de publication : 2007 Article en page(s) : pp 369 - 374 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] ADS40 [Termes IGN] capteur aérien [Termes IGN] capteur en peigne [Termes IGN] étalonnage de chambre métrique [Termes IGN] étalonnage radiométrique [Termes IGN] étalonnage spectral [Termes IGN] image à haute résolution [Termes IGN] limite de résolution géométrique [Termes IGN] orientation interne Résumé : (Auteur) The linear push-broom camera is one of the most important imaging systems in modern photogrammetry and remote sensing to collect high-resolution digital panchromatic and multispectral images for comprehensive evaluation of natural resources and environmental conditions. Most commercial high-resolution satellites such as SPOT-5, Ikonos-2, and QuickBird use similar sensors. Airborne sensors such as the ADS40 and STARIMAGER® also use the push-broom approach to collect multi-channel, seamless image strips for linear objects such as roads, railways, rivers, seashores, electric power lines, pipe lines, and high-rise building areas. Other commercial hyperspectral sensors also use the push-broom approach to collect digital images for remote sensing applications. High performance linear cameras require high resolution geometric, spectral, and radiometric calibration. This topic has not been covered in the scientific literature. Although the self-calibration is successful to compute the calibration parameters of frame camera, it is denied in our tests since the linear camera’s calibrated parameters are dependent on the accuracy of on-board GPS/IMU position and attitude data. In this paper, a rigorous calibration method is presented. This approach has been successfully used in our developed airborne three-line scanner (TLS) imaging system STARIMAGER® in the last five years. The method can accurately compute TLS’s focal length, principle point location, lens distortion, CCD pixel size, CCD curve deformation, and convergence angles between each CCD line sensor on the focal plane. Without any modification, it can be directly applied to single linear sensors and multi-linear sensors. Copyright ASPRS Numéro de notice : A2007-141 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.4.369 En ligne : https://doi.org/10.14358/PERS.73.4.369 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28504 [article]

MERIS in-flight spectral calibration / S. Delwart in International Journal of Remote Sensing IJRS, vol 28 n°3-4 (February 2007)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 28 n°3-4 (February 2007) . - pp 479 - 496 Titre : MERIS in-flight spectral calibration Type de document : Article/Communication Auteurs : S. Delwart, Auteur ; R. Preusker, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 479 - 496 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] absorption [Termes IGN] capteur en peigne [Termes IGN] étalonnage en vol [Termes IGN] étalonnage spectral [Termes IGN] image à moyenne résolution [Termes IGN] image spectrale [Termes IGN] Medium Resolution Imaging Spectrometer [Termes IGN] spectromètre imageur Résumé : (Auteur) This paper will describe the spectral calibration activities conducted during the MERIS commissioning phase and during operation since orbit 12000. MERIS is a medium resolution (300-1200m) push-broom imaging spectrometer covering the spectral domain 390-1040nm with 15 bands, programmable in position and width down to steps of 1.25nm. The onboard spectral calibration hardware is based on the use of an Erbium doped-diffuser panel presenting well-defined absorption peaks. In the spectral calibration mode, MERIS is configured with narrow bands centred on an Erbium absorption feature (two are used). The first orbit, the instrument is calibrated by viewing the "white" radiometric diffuser plate and the following orbit the "pink" Erbium diffuser plate is deployed. This method allows each of the MERIS detectors involved to be characterized in wavelength. The Fraunhofer absorption lines were used to complement these results by providing additional measurements in the violet and near infrared part of the spectrum. For this method, MERIS was configured both for Earth and diffuser observations and acquired data for only a limited number of orbits. This procedure was repeated for different band settings covering a number of Fraunhofer absorption lines. Finally, using Oxygen (O2A) absorption Earth observation data, two different approaches were developed, one based on the retrieval of surface pressure and one based on the shape of the O2A absorption band. Both methods were developed for clear sky land observations, but their performances are improved over bright land targets. Both methods agree to within an accuracy of 0.02 nm. The results from the different methods are analyzed in order to propose a spectral model for the MERIS instrument. Preliminary results of the spectral variation with time are reported. Except camera 4, the instrument is quite stable with time. Camera 4 needs further investigations to better understand its behaviour. Except for the use of the MERIS oxygen band, the spectral characterization of the other MERIS bands is achieved within the nominal accuracy (1 nm). Copyright Taylor & Francis Numéro de notice : A2007-089 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160600821119 En ligne : https://doi.org/10.1080/01431160600821119 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28454 [article]

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Absolute spectroradiometric calibration of the ADS40 sensor / U. Beisl in Revue Française de Photogrammétrie et de Télédétection, n° 181 (Mars 2006)  

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Activities of calibration and validation for the Kompsat-2 MSC data / D.H. Lee in Revue Française de Photogrammétrie et de Télédétection, n° 181 (Mars 2006)  

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Refinement of wavelength calibrations of hyperspectral imaging data using a spectrum-machine technique / B.C. Gao in Remote sensing of environment, vol 90 n° 4 (30/04/2004)  

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Hyperion, a space-based imaging spectrometer / J. Pearlman in IEEE Transactions on geoscience and remote sensing, vol 41 n° 6 (June 2003)  

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