An Objective Method for Recognizing and Partially Correcting Brightband Error in Radar Images

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  • 1 U.K. Meteorological Office, Bracknell, Berkshire, United Kingdom
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Abstract

In this paper, a simple objective method for recognizing and correcting the effects of the radar bright band in weather radar images is presented. The method is based upon the finding that area-average rainfall rate can be estimated from a fractional area of rainfall rate using a threshold value of 2 mm and excluding radar data contaminated by bright band. The observed area-average rainfall rate is much larger than that estimated for brightband cases. It is shown by case studies that the method is successful for frontal rainfall systems. A simple objective method of deriving a rainfall rate within arm affected by bright band is also proposed.

Abstract

In this paper, a simple objective method for recognizing and correcting the effects of the radar bright band in weather radar images is presented. The method is based upon the finding that area-average rainfall rate can be estimated from a fractional area of rainfall rate using a threshold value of 2 mm and excluding radar data contaminated by bright band. The observed area-average rainfall rate is much larger than that estimated for brightband cases. It is shown by case studies that the method is successful for frontal rainfall systems. A simple objective method of deriving a rainfall rate within arm affected by bright band is also proposed.

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