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In the scope of the EU-project VOLTAIRE (Validation of multisensors precipitation fields and numerical modelling in Mediterranean test sites) a software library for automatic and rapid radar data quality check and modification has been developed and tests have been performed with data from different countries. Automatic procedures will never replace an experienced observer, but they help him to do his work and they can be used at places, where observation is not possible.This paper gives an overview over the algorithms that have been adopted or developed during the VOLTAIRE project for radar data quality control. Two examples of these algorithms illustrate the possibilities for data correction but also their limitations. These examples are a clutter correction combined with speckle removal for Plan Position Indicator (PPI) data in particular of non-Doppler radars and a beam blockage correction for PPI data, where no Digital Elevation Model (DEM) is available.

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