نتایج جستجو برای: سنجنده trmm

تعداد نتایج: 3016  

Journal: :Remote Sensing 2017
Zhangli Sun Xiufang Zhu Yaozhong Pan Jinshui Zhang

Floods have caused tremendous economic, societal and ecological losses in the Yangtze River Basin (YRB) of China. To reduce the impact of these disasters, it is important to understand the variables affecting the hydrological state of the basin. In this study, we used Gravity Recovery and Climate Experiment (GRACE) satellite data, flood potential index (FPI), precipitation data (Tropical Rainfa...

Journal: :Computers & Geosciences 2014
Zhong Liu Dana Ostrenga William Teng Steven Kempler Lenard Milich

New online prototypes have been developed to extend and enhance the previous effort by facilitating investigation of product characteristics and intercomparison of precipitation products in different algorithms as well as in different versions at different spatial scales ranging from local to global without downloading data and software. Several popular Tropical Rainfall Measuring Mission (TRMM...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2002
Dimitrios Charalampidis Takis Kasparis W. Linwood Jones

In this paper, we present an algorithm for the automated removal of nonprecipitation related echoes such as atmospheric anomalous propagation (AP) in the lower elevations of meteorological-radar volume scans. The motivation for the development of this technique is the need for an objective quality control algorithm that minimizes human interaction. The algorithm uses both textural and intensity...

2010
BODO BOOKHAGEN

Monsoonal rainfall in the Himalaya dominates erosion and sediment transport through the fluvial system. In addition to the strong seasonal nature of the Indian summer monsoon, striking interannual variations in monsoonal strength characterize longer records. For example, during any given year, rain may penetrate further into the orogen, even though peak rainfall amounts almost always occur at t...

2010
Ahmad Al-Dousari Adam Milewski Saif Ud Din

The Soil and Water Assessment Tool (SWAT) model was used to provide continuous (1998-2006) simulation of overland flow, channel flow, transmission losses for the for the Raudatain watershed in northern Kuwait, and the Umm Al Aish watershed in central Kuwait covering approximately 50% of the Kuwaiti landscape. Inputs required for the SWAT model were extracted from readily available global remote...

2013
Thomas SPANGEHL

The evaluation of dynamical ensemble forecast systems requires a solid validation of basic processes such as the global atmospheric water and energy cycle. The value of any validation approach strongly depends on the quality of the observational data records used. Current approaches utilize in situ measurements, remote sensing data and reanalyses. Related data records are subject to a number of...

2010
Catherine Prigent

During the last decade, satellite observations have allowed significant advances in quantifying precipitation, especially with the contribution of the TRMM mission. Observations at different wavelengths (visible, infrared, and microwaves), in both active and passivemicrowavemodes, are analyzed, and eventually coupled to produce records of precipitation estimates over the globe, with up to hourl...

ژورنال: :مخاطرات محیط طبیعی 0
سیدابوالفضل مسعودیان دانشگاه اصفهان محمدصادق کیخسروی کیانی دانشجوی دکتری، دانشگاه اصفهان

هدف از پژوهش حاضر بررسی تغییرات روزهای همراه با پوشش برف( روزهای برفپوشان) در گروه­های ارتفاعی در حوضه­ی زاینده­رود می­باشد. برای این منظور داده­های سنجنده­ی مودیس ترا و مودیس آکوا برای دوره­ی زمانی 1382 تا 1393 به صورت روزانه و در تفکیک مکانی 500 متر از تارنمای ناسا دریافت گردید. همچنین مدل رقومی ارتفاع هماهنگ با سیستم تصویر و تفکیک داده­های پوشش برف از تارنمای ناسا دریافت و بر روی حوضه استخرا...

Journal: :Remote Sensing 2023

Satellite-based precipitation (SP) data are gaining scientific interest due to their advantage in producing high-resolution products with quasi-global coverage. However, since the major reliance of is on distinctive geographical features each location, they remain at a considerable distance from station-based data. This paper examines effectiveness convolutional autoencoder (CAE) architecture p...

سنجنده‏ هاى ماهواره ‏اى فرصتى را براى اندازه ‏گیرى چندزمانه پیوست ه‏اى از ناحیه وسیع را در طى دوره زمانى چند روز تا چند دهه را فراهم مى‏ آورند. پوشش سنجنده و تکرار فاصله به وسیله ارتفاع سکوى تصویربردارى (ماهواره)، شتاب زاویه ‏اى، میل مدارى متناسب با استوا و تعیین موقعیت متناسب با برابرى بهارى تعیین مى‏ گردد. (Elachi,1987)</str...

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