منابع مشابه
Radar Signal / Image Processing Enhancements Using Alpha - Stable Techniques
In conventional radar signal and image processing, the background clutter and noise are assumed to follow the Gaussian model. Under this assumption, it has been shown that the conventional matched filter is optimal in target detection (Reference 1). However, recent research has found that many nonhomogeneous types of clutter and noise, such as sea clutter, do not fit the Gaussian model well bec...
متن کاملA Comparison of Spotlight Synthetic Aperture Radar Image Formation Techniques
Spotlight synthetic aperture radar images can be formed from the complex phase history data using two main techniques: 1) polar-to-cartesian interpolation followed by twodimensional inverse Fourier transform (2DFFT), and 2) convolution backprojection (CBP). CBP has been widely used to reconstruct medical images in computer aided tomography, and only recently has been applied to form synthetic a...
متن کاملStatistical Analysis of Radar Rainfall Error Propagation
The prediction uncertainty of a hydrologic model is closely related to model formulation and the uncertainties in model parameters and inputs. Currently, the foremost challenges concern not only whether hydrologic model outputs match observations, but also whether or not model predictions are meaningful and useful in the contexts of land use and climate change. The latter is difficult to determ...
متن کاملRainfall Network Optimization Using Radar and Entropy
In this study, a method combining radar and entropy was proposed to design a rainfall network. Owing to the shortage of rain gauges in mountain areas, weather radars are used to measure rainfall over catchments. The major advantage of radar is that it is possible to observe rainfall widely in a short time. However, the rainfall data obtained by radar do not necessarily correspond to that observ...
متن کاملComparison of radar data versus rainfall data
Doppler radar data are increasingly used in rainfall-runoff synthesis studies, perhaps due to radar data availability, among other factors. However, the veracity of the radar data are often a topic of concern. In this paper, three Doppler radar outcomes developed by the United States National Weather Service at three radar sites are examined and compared to actual rain gage data for two separat...
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ژورنال
عنوان ژورنال: Hydrology and Earth System Sciences
سال: 2004
ISSN: 1607-7938
DOI: 10.5194/hess-8-220-2004