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Improved atmospheric correction and chlorophyll-a remote sensing models for turbid waters in a dusty environment / Maryam R. Al Shehhi in ISPRS Journal of photogrammetry and remote sensing, vol 133 (November 2017)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 133 (November 2017) . - pp 46 - 60 Titre : Improved atmospheric correction and chlorophyll-a remote sensing models for turbid waters in a dusty environment Type de document : Article/Communication Auteurs : Maryam R. Al Shehhi, Auteur ; Imen Gherboidj, Auteur ; Hosni Gherida, Auteur Année de publication : 2017 Article en page(s) : pp 46 - 60 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] Arabie [Termes IGN] chlorophylle [Termes IGN] correction atmosphérique [Termes IGN] couleur de l'océan [Termes IGN] eau de mer [Termes IGN] image Aqua-MODIS [Termes IGN] image Terra-MODIS [Termes IGN] test de performance [Termes IGN] turbidité océanique Résumé : (Auteur) This study presents a comprehensive assessment of the performance of the commonly used atmospheric correction models (NIR, SWIR, NIR-SWIR and FM) and ocean color products (OC3 and OC2) derived from MODIS images over the Arabian Gulf, Sea of Oman, and Arabian Sea. The considered atmospheric correction models have been used to derive MODIS normalized water-leaving radiances (nLw), which are compared to in situ water nLw(λ) data collected at different locations by Masdar Institute, United Arab of Emirates, and from AERONET-OC (the ocean color component of the Aerosol Robotic Network) database. From this comparison, the NIR model has been found to be the best performing model among the considered atmospheric correction models, which in turn shows disparity, especially at short wavelengths (400–500 nm) under high aerosol optical depth conditions (AOT (869) > 0.3) and over turbid waters. To reduce the error induced by these factors, a modified model taking into consideration the atmospheric and water turbidity conditions has been proposed. A turbidity index was used to identify the turbid water and a threshold of AOT (869) = 0.3 was used to identify the dusty atmosphere. Despite improved results in the MODIS nLw(λ) using the proposed approach, Chl-a models (OC3 and OC2) show low performance when compared to the in situ Chl-a measurements collected during several field campaigns organized by local, regional and international organizations. This discrepancy might be caused by the improper parametrization of these models or/and the improper selection of bands. Thus, an adaptive power fit algorithm (R2 = 0.95) has been proposed to improve the estimation of Chl-a concentration from 0.07 to 10 mg/m3 by using a new blue/red MODIS band ratio of (443,488)/645 instead of the default band ratio used for OC3(443,488)/547. The selection of this new band ratio (443,488)/645 has been based on using band 645 nm which has been found to represent both water turbidity and algal absorption. Numéro de notice : A2017-721 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2017.09.011 En ligne : https://doi.org/10.1016/j.isprsjprs.2017.09.011 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88406 [article]

Exemplaires(3)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2017111	RAB	Revue	Centre de documentation	En réserve L003	Disponible
081-2017112	DEP-EAF	Revue	Nancy	Dépôt en unité	Exclu du prêt
081-2017113	DEP-EXM	Revue	Saint-Mandé	Dépôt en unité	Exclu du prêt

Automated subpixel photobathymetry and water quality mapping / R.L. Huguenin in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 1 (January 2004)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 1 (January 2004) . - pp 111 - 123 Titre : Automated subpixel photobathymetry and water quality mapping Type de document : Article/Communication Auteurs : R.L. Huguenin, Auteur ; M.H. Wang, Auteur ; R. Biehl, Auteur ; S. Stoodley, Auteur ; J.N. Rogers, Auteur Année de publication : 2004 Article en page(s) : pp 111 - 123 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bathymétrie [Termes IGN] carbone [Termes IGN] carte thématique [Termes IGN] chlorophylle [Termes IGN] classification [Termes IGN] image Ikonos [Termes IGN] image multibande [Termes IGN] lac [Termes IGN] Massachusetts (Etats-Unis) [Termes IGN] pollution des eaux [Termes IGN] précision infrapixellaire [Termes IGN] profondeur [Termes IGN] qualité des eaux [Termes IGN] sédiment [Termes IGN] turbidité océanique Résumé : (Auteur) New photobathymetry and water quality software is described here that utilizes subpixel analysis software (Subpixel Classifier) with an autonomous image calibration procedure and analytic retrieval algorithm to simultaneously retrieve and report bottom depth and the concentrations of suspended chlorophyll, suspended sediments, and colored dissolved organic carbon on a perpixel basis from four-band multispectral image data. From the derived composition, the QSC2 (Quantitative Shoreline Characterization, Version 2.0) software also computes and reports water column visibility parameters (vertical and horizontal subsurface sighting ranges and turbidity, each at four wavelength band passes, plus Secchi depth as a scalar) as well as depth and turbidity confidence. Qsc2 compensates for the effects of the atmosphere, sun and sky reflections from the water surface, subpixel contributions from exposed land, and variations in the bottom material properties. All information is derived automatically from the pixel data alone. The performance of the Qsc2 software was demonstrated using a four-band Ikonos image of Plymouth, Massachusetts. Accuracies of the image-derived compositions, water clarity, and depths were assessed using field and laboratory measurements for eight representative lakes in the scene. The means of the differences of the field-measured and image-derived suspended chlorophyll and colored dissolved organic carbon concentrations for the eight lakes were 1.82 ug/l and 4.34 mgC/1, respectively. The image-derived concentrations of suspended sediments were all below the threshold of detection for the field samples (5 mg/1), in agreement with the field data. The mean of the differences between field-measured and image-derived Secchi depths was 0.76 m. The mean depth difference was 0.57 m. Numéro de notice : A2004-005 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.1.111 En ligne : https://doi.org/10.14358/PERS.70.1.111 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26533 [article]

Water quality retrievals from combined Landsat TM data and ERS-2 SAR data in the Gulf of Finland / Y. Zhang in IEEE Transactions on geoscience and remote sensing, vol 41 n° 3 (March 2003)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 41 n° 3 (March 2003) . - pp 622 - 629 Titre : Water quality retrievals from combined Landsat TM data and ERS-2 SAR data in the Gulf of Finland Type de document : Article/Communication Auteurs : Y. Zhang, Auteur ; J.T. Pulliainen, Auteur ; S.S. Koponen, Auteur ; M.T. Hallikainen, Auteur Année de publication : 2003 Article en page(s) : pp 622 - 629 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Baltique, mer [Termes IGN] image ERS-SAR [Termes IGN] image Landsat-TM [Termes IGN] qualité des eaux [Termes IGN] réseau neuronal artificiel [Termes IGN] turbidité océanique Résumé : (Auteur) This paper presents the applicability of combined Landsat Thematic Mapper and European Remote Sensing 2 synthetic aperture radar (SAR) data to turbidity, Secchi disk depth, and suspended sediment concentration retrievals in the Gulf of Finland. The results show that the estimated accuracy of these water quality variables using a neural network is much higher than the accuracy using simple and multivariate regression approaches. The results also demonstrate that SAR is only a marginally helpful to improve the estimation of these three variables for the practical use in the study area. However, the method still needs to be refined in the area under study. Numéro de notice : A2003-117 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.808906 En ligne : https://doi.org/10.1109/TGRS.2003.808906 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22413 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
065-03031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Monitoring and water pollution modelling of the Bosphorus by regression analysis using multitemporal Landsat-TM data / H. Gonca Coskun (2001)

Public contenu dans Observing our environment from space / G. Begni (2002) Titre : Monitoring and water pollution modelling of the Bosphorus by regression analysis using multitemporal Landsat-TM data Type de document : Article/Communication Auteurs : H. Gonca Coskun, Auteur ; S. Ekercin, Auteur ; A. Oztopal, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 2001 Conférence : EARSeL 2001, 21st international symposium, Observing our environment from space : news solutions for a new millennium 14/05/2001 16/05/2001 Paris France Importance : pp 275 - 279 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Bosphore, détroit du [Termes IGN] image Landsat [Termes IGN] image multibande [Termes IGN] polluant [Termes IGN] pollution des mers [Termes IGN] réflectance [Termes IGN] surveillance écologique [Termes IGN] turbidité océanique Résumé : (Auteur) Environmental pollution is among the most common problems of different nations as a global problem. Especially, water pollution is a continuous threat to surface water resources and transportation routes in the world. Istanbul Straight (Bosphorus) is a model for such a situation due to water passage from the Black Sea to the Mediterranean Sea. In fact, pollution sources of the Bosphorus originate from the wastage of many nations that have costal areas along the Black Sea and Danube River in addition to the population as well as industrial pollutants from the city itself. Pollution surface measurements are carried out concerning total suspended solids JSS), humic materials (HM), chemical oxygen demand (COD), poliaromatik hydrocarbons (PAH) and hydrodynamic conditions of water. On the other hand, digital multispectral Landsat-5 satellite data were recorded and co-registered for a portion of the Bosphorus. Relationships are sought between the water quality parameters and the reflectance values by the use of regression analysis. Although such an analysis has been carried out in the past during 1986 since then there are signs of significant water pollution increment in the Bosphorus. Therefore, this paper aims at the deduction of the most recent data analysis from 1997 in comparisons with earlier studies so as to make temporal decisions in addition to the spatial features. Adaptive parameter estimation in the regression analyses provides efficient computation in an economic manner. These observed reflectance values show a strong relationship with the water quality observation. The necessary values are provided in single pixel values for each band at the station point in the Bosphorus. Satellite data provide a useful index of TSS, HM and PAH. As the reflectance (in the turbidity area) in the longer red and near IR increases faster than the reflectance in shorter blue and green wavelengths, it can be seen that turbidity levels are positively related to reflectance. Numéro de notice : C2001-034 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64942

Coastal geomorphology of Mahe island, Seychelles / B.G. Wagle in International Journal of Remote Sensing IJRS, vol 11 n° 2 (February 1990)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 11 n° 2 (February 1990) . - pp 281 - 287 Titre : Coastal geomorphology of Mahe island, Seychelles Type de document : Article/Communication Auteurs : B.G. Wagle, Auteur ; N.H. Hashimi, Auteur Année de publication : 1990 Article en page(s) : pp 281 - 287 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] érosion côtière [Termes IGN] géomorphologie [Termes IGN] linéament [Termes IGN] littoral [Termes IGN] photo-interprétation [Termes IGN] photographie aérienne [Termes IGN] rivage [Termes IGN] Seychelles [Termes IGN] terrasse [Termes IGN] turbidité océanique Numéro de notice : A1990-052 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431169008955019 En ligne : https://doi.org/10.1080/01431169008955019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25470 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-90021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Remote sensing of aerosols over the oceans using AVHRR data : theory, practice and applications / C.R.N. Rao in International Journal of Remote Sensing IJRS, vol 10 n°4-5 (May 1989)  

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The plume of the Yukon river in relation to the oceanography of the Bering sea / K.G. Dean in Remote sensing of environment, vol 28 n° 1 (April - June 1989)  

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Measurement of the surface emissivity of turbid waters / L. Wen-Yao in Remote sensing of environment, vol 21 n° 1 (01/02/1987)  

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Mapping of coastal-water turbidity using Landsat imagery / L.T. Lindell in International Journal of Remote Sensing IJRS, vol 6 n° 5 (May 1985)  

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Les turbidités de la baie du Mont-Saint-Michel (France) à partir d'une simulation SPOT / R. Zbinden in Photo interprétation, vol 1985 n° 1 (Janvier 1985)

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Etude par télédétection des températures et turbidités des eaux au large de la Loire Atlantique / Jean Cassanet (1982)

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