نتایج جستجو برای: modis images

تعداد نتایج: 268828  

Journal: :جنگل و فرآورده های چوب 0
فرخ پورشکوری اله ده دانشجوی دکتری جنگل‏داری، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران علی اصغر درویش صفت استاد دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران فرهاد صمدزادگان استاد دانشکدۀ فنی دانشگاه تهران، تهران، ایران پدرام عطارد دانشیار دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران

moderate resolution imaging spectroradiometer (modis) have been widely used for active fire detection in the world as the specific channels used for the fire detection have made the modis images applicable. the main objective was to explore the capability of modis images for active fire detection in the zagross forests using the modis contextual algorithm. the study was performed in the marivan...

Variation of snow cover area (SCA) in small to large scale catchment can be studied using MODIS snow products on daily to montly time step since the year 2000. However, one of the major problems in applying the MODIS snow products is cloud obscuration which limits the utilization of these products. In the current study, variation of SCA was investigated in Karoun basin, western part of Iran, us...

Journal: :international journal of advanced biological and biomedical research 2014
a. sarkargar ardakani

snow cover area is one of the most important criteria to calculate snow melt runoff. this can have an effect on the biology of the plant and the environment of a region. using the catchment basin physical characteristic to calculate snow cover area is a conventional method, though its accuracy is not good enough. most of the useful methods in calculating snow cover area are based on satellite i...

Journal: :فیزیک زمین و فضا 0
مجید رحیم زادگان دانشجوی دکتری سنجش از دور، دانشکده مهندسی نقشه¬برداری، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران محمدرضا مباشری دانشیار، دانشکده مهندسی نقشه¬برداری، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

in recent years, extraction of atmospheric temperature and humidity profiles from thermal bands of satellite images is a common practice. the most deployed images for this task have been acquired by moderate resolution imaging spectroradiometer (modis). this sensor which is onboard of terra and aqua platforms consists of a spectroradiometer with 36 bands in visible (vis), near infra-red (nir) u...

Snow cover area is one of the most important criteria to calculate snow melt runoff. This can have an effect on the biology of the plant and the environment of a region. Using the catchment basin physical characteristic to calculate snow cover area is a conventional method, though its accuracy is not good enough. Most of the useful methods in calculating snow cover area are based on satellite i...

Snow cover area is one of the most important criteria to calculate snow melt runoff. This can have an effect on the biology of the plant and the environment of a region. Using the catchment basin physical characteristic to calculate snow cover area is a conventional method, though its accuracy is not good enough. Most of the useful methods in calculating snow cover area are based on satellite i...

2006
Swarvanu Dasgupta John J. Qu

Research has shown that remote sensing in both the optical and microwave domain has the capability of estimating vegetation water content (VWC). Though lower in spatial resolution than MODIS optical bands, AMSR-E microwave measurements are typically less affected by clouds, water vapor, aerosol or solar illumination, making them complementary to MODIS real time measurements over regions of clou...

Journal: :محیط شناسی 0
الناز نوروزی اقدم سید محمودرضا بهبهانی علی رحیمی خوب حسین عقیقی

soil moisture is one of the critical parameters in climatic, ecological and hydrological modeling and vegetation growth. soil moisture is important for environmental studies but due to ground-based point measurement of soil moisture is expensive and impractical for watershed measurement, this parameter is not be used widely to simulate and predict models. overall and uniform view on different p...

Journal: :تحقیقات آب و خاک ایران 0
نادر پیرمرادیان دانشگاه گیلان مریم طاهرپرور دانشگاه گیلان مجید وظیفه دوست دانشگاه گیلان

landsat 7 etm+ data is widely used in studies of the spatial distribution kc and vegetation cover parameters in regional and global scales but slc failure has greatly reduces its usefulness. additionally, the failure is permanent and has failed subsequent attempts to recover the slc, so required and practical way to address this problem is filling the pixels of missed data in the slc-off images...

2012
Shizhi Chen YingLi Tian

In this paper, we propose a framework to detect human activities by constructing super-resolution images from the MODIS data. The highest resolution of the MODIS images is 250 meters per pixel, which is usually not enough to detect human activities. By magnifying and de-blurring the low resolution MODIS image through the SupportVector Regression, the constructed super-resolution image can achie...

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