초록 ▼

Clutter present in radar return signals as used for wind profiling is substantially removed by carrying out a Daubechies wavelet transformation on a time series of radar return signals. The smoothly varying nature of the return from clutter provides a relatively small number of high amplitude compon

Clutter present in radar return signals as used for wind profiling is substantially removed by carrying out a Daubechies wavelet transformation on a time series of radar return signals. The smoothly varying nature of the return from clutter provides a relatively small number of high amplitude components in the wavelet transformation, which are truncated to remove the clutter. Inverse transformation yields a time series having had a significant amount of clutter removed, without distortion of the radar return from turbulence, which can then be processed to provide useful wind profile data.

대표청구항 ▼

A method of measuring wind velocity, including the step of reducing the amplitude of clutter components in a series of samples representing a radar return signal with respect to the return from meteorological reflectors, comprising the steps of: computing wavelet transforms of the series of samples

A method of measuring wind velocity, including the step of reducing the amplitude of clutter components in a series of samples representing a radar return signal with respect to the return from meteorological reflectors, comprising the steps of: computing wavelet transforms of the series of samples employing selected wavelet functions, in order to calculate a set of components; identifying relatively large components from said set of components as due to smoothly-varying radar return signals from nonmeteorological reflectors; truncating the amplitude of the identified components; computing the inverse transform with respect to the remaining components, yielding a series of processed samples having had the return from said nonmeteorological reflectors effectively removed; calculating the power spectrum of the series of processed samples; and analyzing the power spectrum to determine the velocity of meteorological reflectors contributing to the return signal.