نتایج جستجو برای: indicating that trmm
تعداد نتایج: 6462526 فیلتر نتایج به سال:
Satellite technologies provide valuable areal precipitation datasets in alpine mountains. However, coarse resolution still limits the use of satellite hydrological and meteorological research. We evaluated different time scales magnitudes Tropical Rainfall Measurement Mission 3B43 V7 (TRMM) Global Precipitation (GPM) products for regions using ground from January 2015 to June 2019 obtained 25 n...
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...
A critical evaluation of the newly released precipitation data set is very important for both the end users and data developers. Meanwhile, the evaluation may provide a benchmark for the product’s continued development and future improvement. To these ends, the four precipitation estimates including IMERG (the Integrated Multi-satellitE Retrievals for the Global Precipitation Measurement) V04A,...
in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
The overall objective of this study is to evaluate and correct the Tropical Rainfall Measuring Mission (TRMM) 3B42 algorithm for Northern Tunisia focusing on heavy rainfall events. Two types correction methods are tested. first combined scheme (CoSch) which was applied in two different ways. CoSch (1) combines satellite data with interpolated situ data. However, (2) a not map where pixel value ...
Design by Transformation (DxT) is a top-down approach to mechanically derive high-performance algorithms for dense linear algebra. We use DxT to derive the implementation of a representative matrix operation, twosided Trmm. We start with a knowledge base of transformations that were encoded for a simpler set of operations, the level-3 BLAS, and add only a few transformations to accommodate the ...
To improve the current 2A12 rain retrieval algorithm (Kummerow et al. 2001) over land, it is important to evaluate the anomalies in the retrieved product. However, it is difficult to quantify these anomalies globally because there is no single rainfall product that can represent the ground truth. Products from rain gauges have reliable estimation of rainfall only over areas with dense rain gaug...
Since the TRMM launch in 1997, global rain estimation by microwave radiometer has been improved referring the PR data. The microwave radiometer observation becomes the major observation tool for the Global Precipitation Measurement (GPM). However, there are still gaps of global rainfall distribution between PR and TMI (e.g. Berg et al., 2002). One of the major issues for rain retrieval algorith...
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