نتایج جستجو برای: indicating that trmm

تعداد نتایج: 6462526  

ژورنال: :آبخیزداری ایران 0
بنفشه عبداللهی banafshe abdolahi department of irrigation & reclamation engineering, university of tehran, karaj, iran.گروه مهندسی آبیاری و آبادانی، دانشگاه تهران، کرج. سید محمد حسینی موغاری seyed-mohammad hosseini-moghari department of irrigation & reclamation engineering, university of tehran, karaj, iran.گروه مهندسی آبیاری و آبادانی، دانشگاه تهران، کرج. کیومرث ابراهیمی kumars ebrahimi department of irrigation & reclamation engineering, university of tehran, karaj, iran.گروه مهندسی آبیاری و آبادانی، دانشگاه تهران، کرج.

با توجه به اهمیت داده­های بارش در علوم مختلف و عدم وجود شبکه­ ی باران ­سنجی گسترده و مناسب لازم است داده­ های بارش به نحوی برآورد شوند. یکی از بهترین راه­های برآورد بارش، استفاده از داده­ های ماهواره­ ای است. البته ضروری است که ارزیابی دقت ­این داده­ ها قبل از استفاده انجام شود. در مقاله حاضر به ارزیابی دقت داده­ های بارش ماهواره­ای cmorph و 3b42rt v7 trmm در حوضه گرگانرود پرداخته شده است. بدین...

1998
David G. Long

Abstruct-The Tropical Rain Measuring Mission (TRMM) precipitation radar (PR) is designed to measure backscatter from rain in order to map the ;mount and extent of rain in the tropical regions. The TRMM F'R also measures the normalized radar cross section (a") of the surface at a nominal resolution of approximately 4.4 km over an incidence range of 018". The Kuband NASA Scatterometer (NSCAT) mad...

2007
Yimin Ji

The version 6 TRMM rainfall products showed significant improvements on satellite rain retrievals as compared to rain gauge observations. The differences between TRMM TMI rain products and gauge observations are less than 10% over Florida, Texas, Kwajalein, and Darwin ground validation sites for the 8-year period from January 1998 to December 2005. The rain differences between Version 6 TMI and...

2007
Jian-Jian Wang Robert F. Adler Guojun Gu

In this study, nine-years (1998-2006) of monthly precipitation data from Tropical Rainfall Measuring Mission (TRMM) are used to examine the relations between tropical rainfall and surface temperature. A technique is developed to adjust the PR monthly rainfall data in the Tropics (whole ocean and whole land) to account for the effect of the TRMM orbit boost from 350 km to 402 km in August 2001. ...

Journal: :Arabian Journal of Geosciences 2021

The Moroccan High Atlas is very sensitive to soil erosion due its steep slopes, torrential rains, and degraded plant cover. degradation of fertile soils in this mountainous watershed influences negatively upon agricultural productivity. objective study quantify the Tifnout Askaoun southern Morocco. Revised Universal Soil Loss Equation (RUSLE), geographic information system (GIS) techniques, Tro...

2002
WALTER A. PETERSEN STEPHEN W. NESBITT RICHARD J. BLAKESLEE ROBERT CIFELLI PAUL HEIN STEPHEN A. RUTLEDGE

This study utilizes the Tropical Rainfall Measuring Mission (TRMM) satellite precipitation radar (PR), lightning imaging sensor (LIS), and passive microwave imager (TMI) data together with ground-based lightning data to investigate the vertical structure, lightning, and rainfall characteristics of Amazonian and subtropical South American convection for three separate wet seasons. These characte...

2013
Man Zhang Chen Sheng Youcun Qi Yi Yang

In this study, the biases and uncertainty of TRMM 3B42 estimates are investigated over the Huai-River Basin during the summer season in 2010. TRMM products of 3B42RT, 3B42V6 and 3B42V7 are cross-compared to Chinese Precipitation Analyses Products (CPAP) as the reference. It is found that the distribution of bias is closely depend on the terrain with the dry bias locates at hills/mountains and w...

ژورنال: علوم آب و خاک 2016
ابراهیمی, کیومرث, حسینی موغاری, سیدمحمد, دزفولی, دنیا,

Precipitation is an important element of the hydrologic cycle and lack of this data is one of the most serious problems facing research on hydrological and climatic analysis. On the other hand, using satellite images has been proposed by many researchers as one of practical strategies to estimate precipitation. The present paper aims to evaluate the accuracy of satellite precipitation data, pro...

Journal: :Remote Sensing 2013
Nir Y. Krakauer Soni M. Pradhanang Tarendra Lakhankar Ajay K. Jha

Precipitation in mountain regions is often highly variable and poorly observed, limiting abilities to manage water resource challenges. Here, we evaluate remote sensing and ground station-based gridded precipitation products over Nepal against weather station precipitation observations on a monthly timescale. We find that the Tropical Rainfall Measuring Mission (TRMM) 3B-43 precipitation produc...

2015
Zhong Liu Menglin Susan Jin

The NASA/JAXA Tropical Rainfall Measuring Mission (TRMM) has been in operation for over 17 years since 1997. The length of TRMM is far shorter than those from ground observations, raising a question as to whether TRMM derived climatology products are good enough for research and applications. In this study, three climatologies derived from a blended product (the TRMM Multi-Satellite Precipitati...

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