Thales

Alia Iassamen

Jean-Paul Artis

Clémentine Costes

Henri Sauvageot

Olivier Pujol

Frédéric Mesnard

A method of correcting the reflectivity measurements performed by a radar such as a weather radar, a reflectivity measurement being associated with a resolution volume includes analyzing the current resolution volume to determine whether the plane representing the 0&#xb0; C. isotherm passes through it. When the plane representing the 0&#xb0; C. isotherm passes through the current resolution volume, the volume is split into two parts lying on either side of said plane, the attenuation associated with the resolution volume is determined by taking into account the contribution of each of the parts to the measured reflectivity. The reflectivity associated with the current resolution volume is corrected using the attenuation thus determined. An onboard weather radar implements the method.

Method of correcting reflectivity measurements by isotherm detection and radar implementing the method

A method of correcting reflectivity measurements performed by a radar, such as a weather radar, includes a reflectivity measurement being associated with a resolution volume. The method includes acquiring the reflectivity measurement Zcorresponding to the current resolution volume, estimating the attenuation kintroduced by the cloud droplets, said estimating being carried out by using an average vertical profile of the cloud liquid water content, estimating the attenuation kintroduced by dioxygen, estimating the attenuation kintroduced by the water vapor, determining the total specific attenuation k of the non-detectable components taking into account the attenuation k, the attenuation kand the attenuation kestimated in the preceding steps, and correcting the measured reflectivity taking into account the estimated total specific attenuation k. The method may be implemented by an onboard weather radar.

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Toulouse, France

Alia Iassamen