نتایج جستجو برای: avhrr images
تعداد نتایج: 263171 فیلتر نتایج به سال:
Successive efforts have processed the Advanced Very High Resolution Radiometer (AVHRR) sensor archive to produce Normalized Difference Vegetation Index (NDVI) datasets (i.e., PAL, FASIR, GIMMS, and LTDR) under different corrections and processing schemes. Since NDVI datasets are used to evaluate carbon gains, differences among them may affect nations' carbon budgets in meeting international tar...
A new unsupervised algorithm, called CLimate and rEmote sensing Association patterns Miner, for mining association patterns on heterogeneous time series from climate and remote sensing data, integrated in a remote sensing information system is developed to improve the monitoring of sugar cane fields. The system, called RemoteAgri, consists of a large database of climate data and low-resolution ...
Near-real time sea surface current information is needed for ocean operations. On a global scale, only satellites can provide such measurements. This can be done with data from infrared radiometers, available on several satellites, thus giving several images a day. This work analyses the accuracy of such an estimation of surface current fields retrieved with the maximum cross correlation (MCC) ...
Remote sensing observations over the Marseille-Berre area were analyzed as part of the UBL/CLU ESCOMPTE experiment conducted in Marseille (France) in 2001. One hundred and fifty nine NOAA-AVHRR images, with a 1 km spatial resolution, were extracted over the period of June 4 to July 13 2001. Land Surface Temperatures (LST) and a fractional vegetation index were derived from the images. The tempo...
This paper reports a study which aims to (i) develop methodologies for global land cover classi® cations that are objective, reproducible and feasible to implement as new satellite data become available in the future and (ii) provide a global land cover classi® cation product based on the National Aeronautics and Space Administration/National Oceanic and Atmospheric Administration Path® nder La...
APRIL 2004 AMERICAN METEOROLOGICAL SOCIETY | S atellite-based surface temperature is referred to as skin temperature (Dickinson 1994). The National Research Council (NRC; 2000) and the Intergovernmental Panel on Climate Change (IPCC; Houghton et al. 2001) pointed out the urgent need for long-term remote sensing–based land surface skin temperature (LST) data in global warming studies to improve ...
جنگلها 31 درصد از سطح خشکیها را پوشش دادهاند و نقش مهمی را برای بشر و طبیعت به همراه دارند. سالانه صدها مورد آتش سوزی در سطح کشور ایران رخ میدهد و هزاران هکتار از درختان و گیاهان را طعمه خود میسازد. به دلیل قرار گرفتن کشور ایران در کمربند خشک کره زمین و ناحیه پرفشار جنب حارهای، شرایط جوی لازم جهت وقوع آتشسوزی جنگلها و مراتع فراهم میباشد. آتشسوزی اثرات زیان باری نظیر تخریب چرخه طبیعت و...
Five global monthly top-of-atmosphere (TOA) outgoing longwave radiation (OLR) products are evaluated in this study, including the derived from High-Resolution Infrared Radiation Sounder (HIRS), Clouds and Earth’s Radiant Energy System (CERES), Advanced Very High Resolution Radiometer (AVHRR), CM SAF cLoud, Albedo surface RAdiation dataset AVHRR data (CLARA), Global Water Cycle EXchanges (GEWEX)...
It is a current need of research to extensively use the freely available satellite images. The most commonly available satellite images are Moderate Resolution Imaging Spectroradiometer (MODIS) and Advanced Very High Resolution Radiometer (AVHRR). The problems with these images are their poor spatial resolution that restricts their use in various applications. This restriction may be minimized ...
The main objective of this study was to compare the adequacy of various multitemporal image compositing algorithms to produce composite images suitable for burned area analysis. Satellite imagery from the NOAA Advanced Very High Resolution Radiometer (AVHRR) from three different regions (Portugal, central Africa, and South America) were used to compare six algorithms, two of which involve the s...
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