Importance

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Abstract

In a radar apparatus, a processing unit calculates a wavenumber of incoming waves reflected from a target object for each of detected target objects. The processing unit calculates, as a wavenumber evaluation value, a proportion of target objects of which the calculated wavenumber is plural among the all of the detected target objects. The processing unit calculates, as a false azimuth evaluation value, a proportion of target objects including a second incoming wave of which an azimuth difference relative to an azimuth of a first incoming wave of which power of the incoming wave is maximum power is a specific azimuth difference occurring due to periodic signal errors being superimposed on the virtual array, among the target objects of which the calculated wavenumber is plural. The processing unit determines contamination of the radome based on the wavenumber evaluation value and the false azimuth evaluation value.

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First Claim