نتایج جستجو برای: meris

تعداد نتایج: 488  

2004
Adrianos Retalis Nicolaos Sifakis

Satellite sensors of low, high or moderate spatial resolution have started to be used in the last decade to assess and map atmospheric pollution over and around cities. This paper presents preliminary results of the ESA “AO1495” project aiming at the acquisition and examination of Envisat MERIS data for monitoring air pollution (in terms of aerosol optical thickness) in the lower troposphere of...

2005
Wolfgang von Hoyningen-Huene Alexander Kokhanovsky John P. Burrows Beatrice Berthelot Peter Regner Frederic Barèt

RESUME The MERIS L2 reflectance of the data product requires over land surface an atmospheric correction for the aerosol effect. For this purpose the determination of aerosol optical thickness will be done by the BAER (Bremen AErosol Retrieval) approach, modified for this type of data product. Validation and application of the retrieval of spectral aerosol optical thickness and its application ...

امروزه فناوری سنجش از دور در مطالعه‌های مربوط به هواویزها و ذرات گرد و غبار کاربرد فراوانی دارد و به دلیل وسعت منطقه‌‌ای که مورد پایش قرار می‌‌دهد، همواره به عنوان یکی از کارآمدترین روش‌‌ها در مطالعه‌‌ی هم‌‌زمان پدیده‌‌های مختلف اقلیمی، اتمسفری و فرآیندهای هیدرولوژیکی مد نظر محققان بوده است. این فناوری تصاویری با پوشش و تکرار زیاد در زمان‌‌های مختلف فراهم می‌‌سازد و به همین دلیل می‌‌توان از آن ...

2003
D. Ramon R. Santer J. Vidot

1 ABSTRACT Over land, the Dense Dark Vegetation is used to derive in a first stage the aerosol path radiance and in a second stage to propose an aerosol product which consists of the aerosol optical thickness at 443 nm. Air quality monitoring of the particles is based on measurements of PM10 and PM2.5 which are respectively the density of particles of diameter lesser than 10 μm, lesser than 2.5...

2008
Bernard Pinty T. Lavergne T. Kaminski N. Gobron M. Taberner

We present and evaluate results of a validation study of the MERIS Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) product delivered by the operational MGVI algorithm. Our approach is based on the application of an inversion method conducted using both MODIS and MISR derived broadband visible and nearinfrared surface albedo products available during a full seasonal cycle over a...

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