نتایج جستجو برای: trmm
تعداد نتایج: 1318 فیلتر نتایج به سال:
Following the first (1991-1993) and the second (1994-1996) TRMM PR teams, and the third international TRMM PR team (1997-2000), the fourth international TRMM PR team (2001-2003) started its job in 2001 based on the NRA-99-OES-03 in 1999 and NASDA-3rd RA-TRMM in 2000. In April 2004, the fourth international TRMM PR team completed the revisions of the standard algorithms to version 6. NASA and JA...
Rain gauge and satellite-retrieved data have been widely used in basin-scale hydrological applications. While rain gauges provide accurate measurements that are generally unevenly distributed in space, satellites offer spatially regular observations and common error prone retrieval. Comparative evaluation of gauge-based and satellite-based data is necessary in hydrological studies, as precipita...
تحقیق حاضر، با هدف ارزیابی میزان دقت داده¬های باران ماهواره trmm در ایستگاه¬های سینوپتیک ایران و کالیبراسیون آن¬ها در مقیاس روزانه، ماهانه، فصلی و سالانه انجام شده است. بدین منظور، ابتدا سری داده¬های روزانه trmm-3b42 و ماهانه trmm-3b43 از سایت ناسا دانلود شد. پس از پردازش اولیه، مقایسه تطبیقی بین داده¬های ماهواره¬ای و داده¬های مشاهده¬ای باران در 87 ایستگاه سینوپتیک واقع در زون¬های اقلیمی ایران ...
The Tropical Rainfall Measuring Mission (TRMM), jointly sponsored by the National Aeronautics and Space Administration (NASA) and Japan Aerospace Exploration Agency (JAXA, previously known as National Space Development Agency, or NASDA), is the first coordinated international satellite mission to monitor and study tropical and subtropical rain systems (Simpson et al., 1988). A detail descriptio...
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Precise spatio-temporal measurements of rainfall during seasonal monsoons are critical for accurate hydrologic analyses in the tropical regions of Southeast Asia. The use of satellite precipitation data is technologically sound but requires downscaling to minimize inherent uncertainties. The uncertainties at a local climate regime that are essential to be resolved are rarely reported; consequen...
Local dry/wet conditions are of great concern in regional water resource and floods/droughts disaster risk management. Satellite-based precipitation products have greatly improved their accuracy and applicability and are expected to offer an alternative to ground rain gauges data. This paper investigated the capability of Tropical Rainfall Measuring Mission (TRMM) rainfall data for monitoring t...
This study evaluated Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) product i.e. TRMM 3B42 data, using data from 52 rain gauge stations around the Meichuan watershed, which is a representative watershed of Poyang Lake basin in China. Both the latest Version 7 (V7) and previous Version 6 (V6) of TRMM 3B42 data were compared and evaluated for a 9-year per...
The Tropical Rainfall Measuring Mission (TRMM) is a NASA satellite project initiated to address a gap in our ability to accurately observe detailed rainfall patterns over the tropical continents and oceans. To support TRMM, several field campaigns were conducted. The TRMM-LBA (Large-scale Biosphere Atmosphere) experiment was conducted over the southwestern region of the Amazon (state of Rondôni...
Benefiting from the high spatiotemporal resolution and near-global coverage, satellite-based precipitation products are applied in many research fields. However, the applications of these products may be limited due to lack of information on the uncertainties. To facilitate applications of these products, it is crucial to quantify and document their error characteristics. In this study, four sa...
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