نتایج جستجو برای: avhrr

تعداد نتایج: 1310  

ژورنال: علوم آب و خاک 2011
پریسا صابری, , سید محمود رضا بهبهانی , , علی رحیمی خوب, , محمدهادی نظری فر, ,

In this study, the remote sensing statistical approach was used to determine the global solar radiation from NOAA-AVHRR satellite data in southeast of Tehran. This approach is based on the linear correlation between a satellite derived cloud index and the atmospheric transmission measured by the clearness index on the ground. A multiple linear regression model was also used to convert the five ...

Journal: :npj climate and atmospheric science 2023

Abstract Previous studies have documented substantial advancing trends in the onset date of vegetation green-up (VGD) during 1980s and 1990s over Northern Hemisphere, while later based on data from spaceborne advanced very high-resolution radiometer (AVHRR) reported this trend stalled warming hiatus late to early 2010s. However, there is uncertainty finding a VGD advance due identification qual...

2000
David L B Jupp

Scientists at CSIRO (Australia) engage in a coordinated group of related projects involving land surface reflectance anisotropy. One of the underlying themes of the work is to test/establish the existence of a stable underlying “typology” of BRDF directly attributable to land surface spectral and structural parameters that will allow sensible selections of the “shape functions” used in correcti...

Journal: :IEEE Transactions on Geoscience and Remote Sensing 1995

Journal: :Remote Sensing 2014
Karl-Göran Karlsson Erik Johansson

The European Space Agency project for studies of cloud properties in the Climate Change Initiative programme (ESA-CLOUD-CCI) aims at compiling the longest possible time series of cloud products from one single multispectral sensor—The five-channel Advanced Very High Resolution Radiometer (AVHRR) instrument. A particular aspect here is to include corresponding products based on other existing (M...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2003
Rasim Latifovic Josef Cihlar Jing Chen

Climate change studies require consistent, long time series, surface reflectance data. The characterization of the bidirectional reflectance distribution function (BRDF) is important for normalizing the solar radiation reflected from the earth’s surface. We evaluated four BRDF models to identify the preferred approach to the normalization of multiyear National Oceanic and Atmospheric Administra...

2010
Domingo Alcaraz-Segura Elisa Liras Siham Tabik José M. Paruelo Javier Cabello

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...

2004

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 ...

2014
Y. Ma Z. Zhu L. Zhong B. Wang C. Han Z. Wang Y. Wang L. Lu P. M. Amatya W. Ma

In this study, a parameterization method based on MODIS (Moderate Resolution Imaging Spectroradiometer) data, AVHRR (Advanced Very High-Resolution Radiometer) data and in situ data is introduced and tested for estimating the regional evaporative fraction 3 over a heterogeneous landscape. As a case study, the algorithm was applied to the Tibetan Plateau (TP) area. Eight MODIS data images (17 Jan...

ژورنال: :مهندسی نقشه برداری و اطلاعات مکانی 0
امید آذری o. azari no. 1346, valiasr street, mirdamad cross, geomatics engineering faculty, k.n. toosi university of technology, tehran, iran.تهران - خیابان ولیعصر - تقاطع میرداماد - روبروی ساختمان اسکان علی محمدزاده a. mohammadzadeh no. 1346, valiasr street, mirdamad cross, geomatics engineering faculty, k.n. toosi university of technology, tehran, iran.تهران - خیابان ولیعصر - تقاطع میرداماد - روبروی ساختمان اسکان

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...

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